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"abstract": "A method which computer vision technology is used to detect defect of small ceramic tubes is put forward, and the automatic testing system is developed by technologies of computer, computer vision, machine-electron and so on, and automatic detecting and classifying of small ceramic tubes are realized. The system comprises five parts which are the machine of automatically delivering and picking, PC, control unit, lamp-house, image collecting and processing. In testing, first, small ceramic tube running, and simultaneously, shooting and storing the tube images by CCD video camera; and secondly, image is preprocessed, segmented, feature extracted and sorted; finally, the inferior is eliminated by the manipulator. Taking example for the semitransparent ceramic tube that external diameter is 8 millimeter and inside diameter 6 millimeter, the testing method of small caliber and thin ceramic tube is researched by the automatic system. The outcome of the experimentation accords with the fact, this method is simple and feasible, and is of high efficiency, dependability, and high automation.",
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"title": "A New Fuzzy Inertia Weight Particle Swarm Optimization",
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"abstract": "This paper proposes a new Fuzzy tuned Inertia weight Particle Swarm Optimization (FIPSO) which remarkably outperforms the standard PSO, previous fuzzy as well as adaptive based PSO methods. Two benchmark functions with asymmetric initial range settings are used to validate the proposed algorithm and compare its performance with those of the other tuned parameter PSO algorithms. Numerical results indicate that FIPSO is competitive due to its ability to increase search space diversity as well as finding the functions’ global optima and a better convergence performance.",
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"abstract": "This paper proposes the method called Feature Selection based on the Compactness Measure from Scatterplots (FSCoMS) to select the best features extracted from medical images aiming at improving the effectiveness of Content-Based Image Retrieval. This feature selection algorithm consists in a compactness analysis of scatterplots to find the most relevant features providing high separability abilities. A high relevance value of a scatterplot means better predictability among of classes based on two features. We take advantage of this information to generate a ranking for features usefulness. We compared our method to two well-known feature selection methods using three real medical datasets. All of them were compared regarding the dimensionality of the final feature vector and the retrieval effectiveness measured by the precision and recall graphs. The performed experiments show that our method not only obtained the highest retrieval performance but also achieved the smallest number of demanded features (dimensionality) than the other methods analyzed.",
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"content": "This paper proposes the method called Feature Selection based on the Compactness Measure from Scatterplots (FSCoMS) to select the best features extracted from medical images aiming at improving the effectiveness of Content-Based Image Retrieval. This feature selection algorithm consists in a compactness analysis of scatterplots to find the most relevant features providing high separability abilities. A high relevance value of a scatterplot means better predictability among of classes based on two features. We take advantage of this information to generate a ranking for features usefulness. We compared our method to two well-known feature selection methods using three real medical datasets. All of them were compared regarding the dimensionality of the final feature vector and the retrieval effectiveness measured by the precision and recall graphs. The performed experiments show that our method not only obtained the highest retrieval performance but also achieved the smallest number of demanded features (dimensionality) than the other methods analyzed.",
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"fno": "4921a086",
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"fullName": "Gabriel Humpire-Mamani",
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"fullName": "Agma Juci Machado Traina",
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"fullName": "Caetano Traina",
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"title": "A Discussion on the Legal Issues When Selling Hotel Rooms Online: A Case of Macao",
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"abstract": "This paper aims to discuss some of the potential legal issues when hotel companies in Macao sell their hotel rooms over their own websites, namely, terms and conditions, the protection of personal information and the provision of security facilities. Little is known by way of research of potential online legal issues in the tourism industry of Macao, this paper attempts to supplement the limited existing work. The 5-star grouping of hotels in Macao is more able or willing to achieve the desired level of legal protection within their websites whereas the 3-star grouping of hotels has much more ground to cover. Attention to issues such as addressing personal data protection online and adopting appropriate security measures when taking and holding sensitive data of hotel guests should be given more considerable priority within this grouping of service providers.",
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"content": "This paper aims to discuss some of the potential legal issues when hotel companies in Macao sell their hotel rooms over their own websites, namely, terms and conditions, the protection of personal information and the provision of security facilities. Little is known by way of research of potential online legal issues in the tourism industry of Macao, this paper attempts to supplement the limited existing work. The 5-star grouping of hotels in Macao is more able or willing to achieve the desired level of legal protection within their websites whereas the 3-star grouping of hotels has much more ground to cover. Attention to issues such as addressing personal data protection online and adopting appropriate security measures when taking and holding sensitive data of hotel guests should be given more considerable priority within this grouping of service providers.",
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"abstract": "Automatic detection of retinal blood vessels and measurement of vessel diameter are very much important for the diagnosis and the treatment of different ocular diseases including diabetic retinopathy (DR), glaucoma and hypertension. In this paper, we present a novel method to detect blood vessels in the fundus retinal images. The proposed method consists of three main steps. The first step is pre-processing of retinal image to improve the retinal images by evaluation of several image enhancement techniques. In the second step, the vesselness filter is usually used to enhance the blood vessels. Finally Hessian multiscale enhancement filter is designed from the adaptive thresholding of the output of the vesselness filter for vessels detection. The performance of algorithms is compared and analyzed on three publicly available databases (DRIVE, STARE and CHASE_DB) of retinal images using a number of measures, which include accuracy, sensitivity, and specificity.",
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"abstract": "Visualization of vascular structures is a common and frequently performed task in the field of medical imaging. There exist well established and applicable methods such as Maximum Intensity Projection (MIP) and Curved Planar Reformation (CPR). However, when calcified vessel walls are investigated, occlusion hinders exploration of the vessel interior with MIP. In contrast, CPR offers the possibility to visualize the vessel lumen by cutting a single vessel along its centerline. Extending the idea of CPR, we propose a novel technique, called Centerline Reformation (CR), which is capable of visualizing the lumen of spatially arbitrarily oriented vessels not necessarily connected in a tree structure. In order to visually emphasize depth, overlap and occlusion, halos can optionally envelope the vessel lumen. The required vessel centerlines are obtained from volumetric data by performing a scale-space based feature extraction. We present the application of the proposed technique in a focus and context setup. Further, we demonstrate how it facilitates the investigation of dense vascular structures, particularly cervical vessels or vessel data featuring peripheral arterial occlusive diseases or pulmonary embolisms. Finally, feedback from domain experts is given.",
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"abstract": "We propose a fully automatic system to reconstruct and visualize 3D blood vessels in Augmented Reality (AR) system from stereo X-ray images with bones and body fat. Currently, typical 3D imaging technologies are expensive and carrying the risk of irradiation exposure. To reduce the potential harm, we only need to take two X-ray images before visualizing the vessels. Our system can effectively reconstruct and visualize vessels in following steps. We first conduct initial segmentation using Markov Random Field and then refine segmentation in an entropy based post-process. We parse the segmented vessels by extracting their centerlines and generating trees. We propose a coarse-to-fine scheme for stereo matching, including initial matching using affine transform and dense matching using Hungarian algorithm guided by Gaussian regression. Finally, we render and visualize the reconstructed model in a HoloLens based AR system, which can essentially change the way of visualizing medical data. We have evaluated its performance by using synthetic and real stereo X-ray images, and achieved satisfactory quantitative and qualitative results.",
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"abstract": "The results of study on T-wave alternans in the group of patients with ischemic heart disease are shown. The body surface potential maps were recorded with use of 67 channel high-resolution ECG system. Electrocardiographic stress test was performed during the patient examinations. The T-wave alternans ratio was calculated and results were compared with data obtained by single-photon emission computed tomography (SPECT). Significant correlations between results of T-wave alternans analysis and SPECT test have been found.",
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"content": "The results of study on T-wave alternans in the group of patients with ischemic heart disease are shown. The body surface potential maps were recorded with use of 67 channel high-resolution ECG system. Electrocardiographic stress test was performed during the patient examinations. The T-wave alternans ratio was calculated and results were compared with data obtained by single-photon emission computed tomography (SPECT). Significant correlations between results of T-wave alternans analysis and SPECT test have been found.",
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"affiliation": "Nalecz Institute of Biocybernetics and Biomedical Engineering, Warsaw, Poland",
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"title": "Cardiac SPECT restoration using MR-based support constraints",
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"abstract": "Cardiac SPECT (single photon emission computed tomography) is an important tool for evaluating heart disease in terms of diagnosis and treatment, especially for determining myocardial perfusion and thus the degree of myocardial injury. The distortion of left ventricular (LV) geometry can cause errors in defect size determination from SPECT perfusion images due to partial volume effects. Constrained iterative restoration, using an anatomic constraint from a registered magnetic resonance (MR) image of the heart, can be used to correct these errors and thus improve the interpretation and measurement of cardiac perfusion images.",
"abstracts": [
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"content": "Cardiac SPECT (single photon emission computed tomography) is an important tool for evaluating heart disease in terms of diagnosis and treatment, especially for determining myocardial perfusion and thus the degree of myocardial injury. The distortion of left ventricular (LV) geometry can cause errors in defect size determination from SPECT perfusion images due to partial volume effects. Constrained iterative restoration, using an anatomic constraint from a registered magnetic resonance (MR) image of the heart, can be used to correct these errors and thus improve the interpretation and measurement of cardiac perfusion images.",
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"normalizedAbstract": "Cardiac SPECT (single photon emission computed tomography) is an important tool for evaluating heart disease in terms of diagnosis and treatment, especially for determining myocardial perfusion and thus the degree of myocardial injury. The distortion of left ventricular (LV) geometry can cause errors in defect size determination from SPECT perfusion images due to partial volume effects. Constrained iterative restoration, using an anatomic constraint from a registered magnetic resonance (MR) image of the heart, can be used to correct these errors and thus improve the interpretation and measurement of cardiac perfusion images.",
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"Single Photon Emission Computed Tomography Image Restoration Biomedical NMR Cardiology Medical Image Processing Cardiac SPECT Restoration MR Based Support Constraints Heart Disease Evaluation Medical Diagnostic Imaging Treatment Myocardial Perfusion Determination Myocardial Injury Degree Partial Volume Effects Defect Size Determination Errors Left Ventricular Geometry Distortion Registered Magnetic Resonance Image Heart Cardiac Perfusion Images"
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"affiliation": "Dept. of Diagnostic Radiol., Yale Univ., New Haven, CT, USA",
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"title": "2015 IEEE 28th International Symposium on Computer-Based Medical Systems (CBMS)",
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"doi": "10.1109/CBMS.2015.52",
"title": "Segmentation and Registration Methods in Short Axis Cardiac MRI and SPECT Images in Chagas Disease",
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"abstract": "The relationship between the myocardial tissue damage, myocardial perfusion defects and gaps in the autonomic innervations is still poorly understood. This paper proposes methods capable of providing an integrated visualization and analysis of tissue injuries through MRI images, autonomic innervations and myocardial perfusion through SPECT images. The proposed method is based on segmentation of MRI and registration between MRI images and SPECT images using 123I-MIBG and 99mTc-MIBI as tracers. Fibrosis segmentation in MRI images was performed based on the algorithm of maximum Tsallis entropy. Nonrigid registrations method based on B-Spline were used to align image volumes. Results show correlation between fibrosis and denervation areas in the middle short axis was obtained by Spearman correlation (r=0.571, p-value&le;). The development tool provides a better understanding of te relatons injuries amd ischemia caused by Chagas disease.",
"abstracts": [
{
"abstractType": "Regular",
"content": "The relationship between the myocardial tissue damage, myocardial perfusion defects and gaps in the autonomic innervations is still poorly understood. This paper proposes methods capable of providing an integrated visualization and analysis of tissue injuries through MRI images, autonomic innervations and myocardial perfusion through SPECT images. The proposed method is based on segmentation of MRI and registration between MRI images and SPECT images using 123I-MIBG and 99mTc-MIBI as tracers. Fibrosis segmentation in MRI images was performed based on the algorithm of maximum Tsallis entropy. Nonrigid registrations method based on B-Spline were used to align image volumes. Results show correlation between fibrosis and denervation areas in the middle short axis was obtained by Spearman correlation (r=0.571, p-value&le;). The development tool provides a better understanding of te relatons injuries amd ischemia caused by Chagas disease.",
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"fno": "6775a072",
"keywords": [
"Biological Tissues",
"Biomedical MRI",
"Cardiology",
"Diseases",
"Image Registration",
"Image Segmentation",
"Injuries",
"Medical Image Processing",
"Radioisotope Imaging",
"Radioisotopes",
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"Splines Mathematics",
"Statistical Analysis",
"Short Axis Cardiac MRI Image Segmentation",
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"affiliation": "Dept. of Comput. & Math., Univ. of Sao Paulo, Ribeirao Preto, Brazil",
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"affiliation": "Med. Sch. of Ribeirao Preto, Univ. of Sao Paulo, Ribeirao Preto, Brazil",
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"affiliation": "Med. Sch. of Ribeirao Preto, Univ. of Sao Paulo, Ribeirao Preto, Brazil",
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"affiliation": "Dept. of Comput. & Math., Univ. of Sao Paulo, Ribeirao Preto, Brazil",
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"abstract": "This paper presents an automatic segmentation technique for identifying nasopharyngeal carcinoma regions in CT images. The proposed technique is based on the region growing method by which an initial seed is automatically generated. A probabilistic map representing a chance of being the tumor pixel in each CT image will be created and used for initial seed determination. This map is generated from three probabilistic functions established upon location of the tumor considered, intensities of the tumor pixels, and asymmetry of organs respectively. A representative of potential tumor pixels will be selected as an initial seed. The experimental results showed that seeds were correctly determined with the percent accuracy of 84.32%. These seeds were grown in preprocessed CT images for identifying the nasopharyngeal carcinoma regions subsequently. The results showed that, for no metastasis cases, perfect match and corresponding ratio were 85.03% and 52.44% respectively and 29.26% and 28.03% correspondingly for metastasis cases. This resulted from a single seed generated in each CT image. It was unable to identify more than one tumor region.",
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"abstract": "Chaotic theory and bifurcation of modern nonlinear science were used to study the evolution of micro-cracks under the hydraulic fracturing of the rock mass characteristics, the tensor damage variable which described the chao evolution of micro-cracks and microstructure of rock were defined, the Logistic model of localization bifurcation of intrinsic fracturer rock was built, bifurcation point of chaotic evolution of micro-cracks, bifurcation the number of crack patterns and different degree of sub-branch off were calculated. practical research block was Select, results of theoretical calculation and finite element software simulation showed: Theoretical calculation is accur, and credible.",
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"abstract": "Degradation of material properties could be considered a micro damage mechanism of concrete structures, which introduces macro behavior with stiffness delimitation and bearing loss of structural system. In this essay, a framework of damage constitutive relationship of ductile solids based on irreversible thermodynamics was presented and exploited in numerical implementation of concrete material. A yielding criterion was expressed in time discrete formulation. The algorithmic functions of stress, strain and damage variable were supplied on the ground of discrete time step. Two-step map returning method (closest project point method) based upon implicit backward Euler scheme was expressed according to the stress upgrades operation, with plastic potential being equivalent to yielding function. The plastic parameter and consistent tangent stiffness tensor were deduced which meet constitutive integral and convergent condition assumption. Comparison between experiment and simulation indicated validity and rationality of the model and algorithm described previously.",
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"content": "Degradation of material properties could be considered a micro damage mechanism of concrete structures, which introduces macro behavior with stiffness delimitation and bearing loss of structural system. In this essay, a framework of damage constitutive relationship of ductile solids based on irreversible thermodynamics was presented and exploited in numerical implementation of concrete material. A yielding criterion was expressed in time discrete formulation. The algorithmic functions of stress, strain and damage variable were supplied on the ground of discrete time step. Two-step map returning method (closest project point method) based upon implicit backward Euler scheme was expressed according to the stress upgrades operation, with plastic potential being equivalent to yielding function. The plastic parameter and consistent tangent stiffness tensor were deduced which meet constitutive integral and convergent condition assumption. Comparison between experiment and simulation indicated validity and rationality of the model and algorithm described previously.",
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"normalizedAbstract": "Degradation of material properties could be considered a micro damage mechanism of concrete structures, which introduces macro behavior with stiffness delimitation and bearing loss of structural system. In this essay, a framework of damage constitutive relationship of ductile solids based on irreversible thermodynamics was presented and exploited in numerical implementation of concrete material. A yielding criterion was expressed in time discrete formulation. The algorithmic functions of stress, strain and damage variable were supplied on the ground of discrete time step. Two-step map returning method (closest project point method) based upon implicit backward Euler scheme was expressed according to the stress upgrades operation, with plastic potential being equivalent to yielding function. The plastic parameter and consistent tangent stiffness tensor were deduced which meet constitutive integral and convergent condition assumption. Comparison between experiment and simulation indicated validity and rationality of the model and algorithm described previously.",
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"title": "Artificial Intelligence and Computational Intelligence, International Conference on",
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"title": "Visualization of Wavelet Result for Damage Detection in Arch",
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"abstract": "The more application of visualization techniques in medicine, geology and other fields is employed, but less use in structural damage detection area. The damage detection results in arch structure are visualized in this paper. First, the displacement modes of intact and damaged arch are simulated and the displacement mode changes are obtained. Next, the wavelet transformation is applied to the displacement mode changes in arch and the abrupt changes of wavelet coefficients indicate damage. Finally, the damage detection results are visualized via volume visualization techniques. The results show that wavelet coefficient module maximum of mode changes correspond to the damage placement and are influenced by damage location. At the same time, the visualized damage detection results not only contain the original structure outline, but also enable damage detection index to be displayed exactly and vividly.",
"abstracts": [
{
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"content": "The more application of visualization techniques in medicine, geology and other fields is employed, but less use in structural damage detection area. The damage detection results in arch structure are visualized in this paper. First, the displacement modes of intact and damaged arch are simulated and the displacement mode changes are obtained. Next, the wavelet transformation is applied to the displacement mode changes in arch and the abrupt changes of wavelet coefficients indicate damage. Finally, the damage detection results are visualized via volume visualization techniques. The results show that wavelet coefficient module maximum of mode changes correspond to the damage placement and are influenced by damage location. At the same time, the visualized damage detection results not only contain the original structure outline, but also enable damage detection index to be displayed exactly and vividly.",
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"normalizedAbstract": "The more application of visualization techniques in medicine, geology and other fields is employed, but less use in structural damage detection area. The damage detection results in arch structure are visualized in this paper. First, the displacement modes of intact and damaged arch are simulated and the displacement mode changes are obtained. Next, the wavelet transformation is applied to the displacement mode changes in arch and the abrupt changes of wavelet coefficients indicate damage. Finally, the damage detection results are visualized via volume visualization techniques. The results show that wavelet coefficient module maximum of mode changes correspond to the damage placement and are influenced by damage location. At the same time, the visualized damage detection results not only contain the original structure outline, but also enable damage detection index to be displayed exactly and vividly.",
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"fullName": "Cheng Liangyan",
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"fullName": "Li Guilin",
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"fullName": "Nie Zhenhua",
"givenName": "Nie",
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{
"affiliation": null,
"fullName": "Ma Hongwei",
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"abstractUrl": "/proceedings-article/iciii/2010/4279b545/12OmNrYlmAf",
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"id": "proceedings/icec/2009/3655/0/3655a143",
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"id": "proceedings/iciii/2009/3876/2/3876b039",
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"abstractUrl": "/proceedings-article/aici/2010/4225b127/12OmNvDqsNy",
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{
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"abstractUrl": "/proceedings-article/isip/2010/4261a502/12OmNxveNTq",
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"abstractUrl": "/proceedings-article/icece/2010/4031b260/12OmNyQ7FM8",
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"title": "Probability Model of Surface Corrosion Damage Ratio of Aluminum Alloy",
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"abstract": "Experiments were conducted on aluminum alloy specimens to observe the evolution of surface corrosion damage under controlled electrochemical conditions. After corrosion exposure, the optical microscope was used to measure the corrosion pits density and size on the surface of specimens. Based on the measured data sets of surface corrosion damage ratio, the probabilistic model of corrosion damage evolution was investigated. The Logistic distribution was acceptable for the data sets of the surface corrosion damage ratio. Using the probability model of corrosion damage evolution, the corrosion damage in varied environment can be forecasted.",
"abstracts": [
{
"abstractType": "Regular",
"content": "Experiments were conducted on aluminum alloy specimens to observe the evolution of surface corrosion damage under controlled electrochemical conditions. After corrosion exposure, the optical microscope was used to measure the corrosion pits density and size on the surface of specimens. Based on the measured data sets of surface corrosion damage ratio, the probabilistic model of corrosion damage evolution was investigated. The Logistic distribution was acceptable for the data sets of the surface corrosion damage ratio. Using the probability model of corrosion damage evolution, the corrosion damage in varied environment can be forecasted.",
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"normalizedAbstract": "Experiments were conducted on aluminum alloy specimens to observe the evolution of surface corrosion damage under controlled electrochemical conditions. After corrosion exposure, the optical microscope was used to measure the corrosion pits density and size on the surface of specimens. Based on the measured data sets of surface corrosion damage ratio, the probabilistic model of corrosion damage evolution was investigated. The Logistic distribution was acceptable for the data sets of the surface corrosion damage ratio. Using the probability model of corrosion damage evolution, the corrosion damage in varied environment can be forecasted.",
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{
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"fullName": "Kuan Hu",
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{
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"fullName": "Wei Zhang",
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"abstractUrl": "/proceedings-article/icmtma/2013/4932a845/12OmNwFid6p",
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"proceeding": {
"id": "12OmNyaXPPN",
"title": "2009 Second International Conference on Information and Computing Science",
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"article": {
"id": "12OmNCfSqHQ",
"doi": "10.1109/ICIC.2009.377",
"title": "Study on Repair Fatigue Damage of Axle Shaft Mechanical Parts",
"normalizedTitle": "Study on Repair Fatigue Damage of Axle Shaft Mechanical Parts",
"abstract": "Abstract—Axel shaft is a most commonly axial mechanical part. Because of bearing bending and torsion loading at the same time, fatigue damage is a kind of common form to shaft part. So repair of fatigue is very important. In this paper, a theoretical model of fatigue damage of the materials was established, the value of the damage was calculated, the mechanism of fatigue damage and repairing of the shaft were studied in macro, meso and micro aspects. It was found that the segregated distributing of particles in the second phase of materials has played an important role in initiating, nucleating of fatigue damage, forming and expansion of micro-cracks. First of all, initiation of cracks is in the place of Cr-rich particles or with the Cr carbide particles in the second phase of material. Fatigue damage of the shaft is repaired by the way of heat treatment. Tests have been done in several aspects such as the choices of tempering opportunity, temperatures, methods, cooling and so on. After analysis to the results of the tests, it was found that there are some effects on the repair of fatigue damage of the shaft is different in different materials. The effect of repairing to the fatigue damage is more evident for the shaft made of 40Cr steel than that of 45steel. The accumulated fatigue life of the shaft has been raised by tempering. It was found that the materials can remember the tempering temperature that is used in the past. There is a temperature threshold in choosing tempering temperatures when repairing fatigue damage of the materials.",
"abstracts": [
{
"abstractType": "Regular",
"content": "Abstract—Axel shaft is a most commonly axial mechanical part. Because of bearing bending and torsion loading at the same time, fatigue damage is a kind of common form to shaft part. So repair of fatigue is very important. In this paper, a theoretical model of fatigue damage of the materials was established, the value of the damage was calculated, the mechanism of fatigue damage and repairing of the shaft were studied in macro, meso and micro aspects. It was found that the segregated distributing of particles in the second phase of materials has played an important role in initiating, nucleating of fatigue damage, forming and expansion of micro-cracks. First of all, initiation of cracks is in the place of Cr-rich particles or with the Cr carbide particles in the second phase of material. Fatigue damage of the shaft is repaired by the way of heat treatment. Tests have been done in several aspects such as the choices of tempering opportunity, temperatures, methods, cooling and so on. After analysis to the results of the tests, it was found that there are some effects on the repair of fatigue damage of the shaft is different in different materials. The effect of repairing to the fatigue damage is more evident for the shaft made of 40Cr steel than that of 45steel. The accumulated fatigue life of the shaft has been raised by tempering. It was found that the materials can remember the tempering temperature that is used in the past. There is a temperature threshold in choosing tempering temperatures when repairing fatigue damage of the materials.",
"__typename": "ArticleAbstractType"
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],
"normalizedAbstract": "Abstract—Axel shaft is a most commonly axial mechanical part. Because of bearing bending and torsion loading at the same time, fatigue damage is a kind of common form to shaft part. So repair of fatigue is very important. In this paper, a theoretical model of fatigue damage of the materials was established, the value of the damage was calculated, the mechanism of fatigue damage and repairing of the shaft were studied in macro, meso and micro aspects. It was found that the segregated distributing of particles in the second phase of materials has played an important role in initiating, nucleating of fatigue damage, forming and expansion of micro-cracks. First of all, initiation of cracks is in the place of Cr-rich particles or with the Cr carbide particles in the second phase of material. Fatigue damage of the shaft is repaired by the way of heat treatment. Tests have been done in several aspects such as the choices of tempering opportunity, temperatures, methods, cooling and so on. After analysis to the results of the tests, it was found that there are some effects on the repair of fatigue damage of the shaft is different in different materials. The effect of repairing to the fatigue damage is more evident for the shaft made of 40Cr steel than that of 45steel. The accumulated fatigue life of the shaft has been raised by tempering. It was found that the materials can remember the tempering temperature that is used in the past. There is a temperature threshold in choosing tempering temperatures when repairing fatigue damage of the materials.",
"fno": "3634d264",
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"affiliation": null,
"fullName": "Tingliang Guo",
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"surname": "Guo",
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{
"affiliation": null,
"fullName": "Yanfeng Wang",
"givenName": "Yanfeng",
"surname": "Wang",
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"pubDate": "2009-05-01T00:00:00",
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"abstractUrl": "/proceedings-article/icicta/2012/4637a674/12OmNAOsMPn",
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"title": "Intelligent Computation Technology and Automation, International Conference on",
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{
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{
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"id": "proceedings/icmtma/2010/3962/3",
"title": "2010 International Conference on Measuring Technology and Mechatronics Automation",
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{
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"doi": null,
"abstractUrl": "/proceedings-article/icdma/2013/5016b160/12OmNyUFfLT",
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"title": "2013 Fourth International Conference on Digital Manufacturing & Automation (ICDMA)",
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{
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"abstractUrl": "/proceedings-article/icsps/2009/3654a989/12OmNzxyiKA",
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{
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"title": "2019 2nd World Conference on Mechanical Engineering and Intelligent Manufacturing (WCMEIM)",
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{
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"abstractUrl": "/proceedings-article/icectt/2020/992800a308/1oa5ib3KQwg",
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"id": "proceedings/icectt/2020/9928/0",
"title": "2020 5th International Conference on Electromechanical Control Technology and Transportation (ICECTT)",
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"proceeding": {
"id": "12OmNzvQI1d",
"title": "2010 International Conference on Measuring Technology and Mechatronics Automation",
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"volume": "2",
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"article": {
"id": "12OmNx0A7Kn",
"doi": "10.1109/ICMTMA.2010.248",
"title": "Pipe Damage Detection Method Based on BSWI and SVR",
"normalizedTitle": "Pipe Damage Detection Method Based on BSWI and SVR",
"abstract": "A new method for pipe damage detection is presented based on the combination of finite element method (FEM) of B-spline wavelet on the interval (BSWI) and support vector regression (SVR). The pipe with various damage location and size is modeled by wavelet-based elements to gain precise frequencies for forward problem analysis. The SVR algorithm is employed to build the prediction and analysis model trained by the frequencies with respect to damage location and size. The trained SVR model is applied to detect the location and size of an unknown damage in the pipe according to the first three measured frequencies. Numerical simulation is presented to show the accuracy of the proposed method.",
"abstracts": [
{
"abstractType": "Regular",
"content": "A new method for pipe damage detection is presented based on the combination of finite element method (FEM) of B-spline wavelet on the interval (BSWI) and support vector regression (SVR). The pipe with various damage location and size is modeled by wavelet-based elements to gain precise frequencies for forward problem analysis. The SVR algorithm is employed to build the prediction and analysis model trained by the frequencies with respect to damage location and size. The trained SVR model is applied to detect the location and size of an unknown damage in the pipe according to the first three measured frequencies. Numerical simulation is presented to show the accuracy of the proposed method.",
"__typename": "ArticleAbstractType"
}
],
"normalizedAbstract": "A new method for pipe damage detection is presented based on the combination of finite element method (FEM) of B-spline wavelet on the interval (BSWI) and support vector regression (SVR). The pipe with various damage location and size is modeled by wavelet-based elements to gain precise frequencies for forward problem analysis. The SVR algorithm is employed to build the prediction and analysis model trained by the frequencies with respect to damage location and size. The trained SVR model is applied to detect the location and size of an unknown damage in the pipe according to the first three measured frequencies. Numerical simulation is presented to show the accuracy of the proposed method.",
"fno": "3962c899",
"keywords": [
"Pipe",
"Damage Detection",
"SVR",
"BSWI"
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"authors": [
{
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"abstract": "In order to research the damage on weapon equipment by explosive shock wave, simulation experiments were carried out to study explosive impact damage on cantilever box girder. By using principal component analysis (PCA), it presented a data mining method on cantilever box girder damage. It showed that: the calculating result by using this method was agreeable with the result by using traditional method. Therefore, this damage data mining method based on PCA was feasible, it could be used in damage assessment of weapons equipment structure.",
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"content": "In order to research the damage on weapon equipment by explosive shock wave, simulation experiments were carried out to study explosive impact damage on cantilever box girder. By using principal component analysis (PCA), it presented a data mining method on cantilever box girder damage. It showed that: the calculating result by using this method was agreeable with the result by using traditional method. Therefore, this damage data mining method based on PCA was feasible, it could be used in damage assessment of weapons equipment structure.",
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"title": "Thermo Cardiosystems' Heartmate ventricular assist systems",
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"abstract": "A family of ventricular assist devices (VADs) based on a single blood pump is discussed. These devices have textured blood contacting surfaces to develop a stable biologic lining. Different versions are intended for short, intermediate, and permanent use. The temporary devices are kept simple and are pneumatically driven. The longer term device contains an implanted, low-speed, DC torque motor. The pneumatic device is driven by a console that generates shaped pulses of compressed gas with a self-contained pump. An intermediate term device combines an implanted electrically actuated VAD with an external battery pack and control unit that can be worn by the patient. Power is delivered to the implanted motor through a lead that penetrates the skin. The permanent device has no skin penetrations; power is transmitted across the skin with an air core transformer.<>",
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"abstract": "This paper presents a method for filtering binary volumes in order to reduce the aliasing artifacts that typically result when trying to visualize the surfaces described by such a binary partitioning. The proposed method is a reformulation of the technique of constrained elastic surface nets from the literature. The strategy is to estimate a 3D surface using an iterative relaxation process, which finds the surface of minimal area while treating the binary input data as a set of constraints. Unlike surface nets, the proposed method does not require the generation of any explicit surface representation; it acts directly on the volume. This is done by treating the level sets of the volume as deformable surfaces moving under a mean curvature flow constrained by a discretely sampled inside/outside function. Because the proposed method does not require generating a surface mesh, it avoids the various singularities and topological problems associated with iso-surface generation. It also avoids the artifacts that an irregular mesh topology can produce in deformation processes. If the goal is volume rendering, the proposed method avoids the time consuming process of converting surface meshes back into volumes.",
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"abstract": "In order to solve the slightly complicated structure and the big calculation of integral variable universe adaptive fuzzy controller, as well as the difficulty to choose the contraction-expansion factor, a weighted sum-type variable universe adaptive fuzzy controller is designed. At the same time the general method on how to choose contraction-expansion factor is given. First, based on weighted sum principle, a weighted sum-type variable universe adaptive fuzzy controller is designed, and then two-type contraction-expansion factors are discussed. Second, according to the different kinds of contraction-expansion factors which have been discussed above, two weighted sum-type variable universe adaptive controllers are designed on the triple inverted pendulum. Finally, the simulation results, which are derived from the triple inverted pendulum under the control of the two controllers respectively, are compared. The simulation results not only illustrate the effectiveness of the weighted sum-type variable universe adaptive fuzzy controller for dealing with nonlinear systems, but also manifest the general method on how to choose contraction-expansion factor is very reasonable.",
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"abstract": "Based on damage modes of container cranes under earthquake and the characteristic of over-span flexible structures, the anti-seismic design of such machines was investigated. Taking the first crane equipped with isolating device as an example, through dynamic analysis and simulating to anti-seismic crane flexible system under the earthquake and validating analysis and results though the earthquake table tests, efforts was made to research for suitable anti-seismic device and design method for port cranes. The calculation and analysis in the present study could be used as a new way for earthquake resistant design of large-scale flexible portal machine.",
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"content": "Based on damage modes of container cranes under earthquake and the characteristic of over-span flexible structures, the anti-seismic design of such machines was investigated. Taking the first crane equipped with isolating device as an example, through dynamic analysis and simulating to anti-seismic crane flexible system under the earthquake and validating analysis and results though the earthquake table tests, efforts was made to research for suitable anti-seismic device and design method for port cranes. The calculation and analysis in the present study could be used as a new way for earthquake resistant design of large-scale flexible portal machine.",
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"title": "Influence of Seismic Wave Frequency on Wave Passage Effect of Plane Frame",
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"abstract": "The plane frame structure of three-span, six-story reinforced concrete structure, is adopted to study whether wave passage effect should be considered in the seismic responses of frame structures or not. The influence factors of seismic wave's frequency and wave passage effect on the structure are studied. The earthquake responses of the frame structure to wave passage excitations and uniform excitations are computed respectively for the class III site seismic wave by using Midas Gen software. The results of column shear forces obtained from the wave passage excitations are compared with those of the uniform excitations. And the frequencies of seismic waves are analyzed. Numerical results showed that wave passage effect caused the shear force of the first-story column facing the seismic wave to increase remarkably for the plane frame structures. For the seismic waves with wave passage effect, the main peaks of frequency amplitude spectrum of seismic wave arise in low frequency domain.",
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"content": "The plane frame structure of three-span, six-story reinforced concrete structure, is adopted to study whether wave passage effect should be considered in the seismic responses of frame structures or not. The influence factors of seismic wave's frequency and wave passage effect on the structure are studied. The earthquake responses of the frame structure to wave passage excitations and uniform excitations are computed respectively for the class III site seismic wave by using Midas Gen software. The results of column shear forces obtained from the wave passage excitations are compared with those of the uniform excitations. And the frequencies of seismic waves are analyzed. Numerical results showed that wave passage effect caused the shear force of the first-story column facing the seismic wave to increase remarkably for the plane frame structures. For the seismic waves with wave passage effect, the main peaks of frequency amplitude spectrum of seismic wave arise in low frequency domain.",
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"normalizedAbstract": "The plane frame structure of three-span, six-story reinforced concrete structure, is adopted to study whether wave passage effect should be considered in the seismic responses of frame structures or not. The influence factors of seismic wave's frequency and wave passage effect on the structure are studied. The earthquake responses of the frame structure to wave passage excitations and uniform excitations are computed respectively for the class III site seismic wave by using Midas Gen software. The results of column shear forces obtained from the wave passage excitations are compared with those of the uniform excitations. And the frequencies of seismic waves are analyzed. Numerical results showed that wave passage effect caused the shear force of the first-story column facing the seismic wave to increase remarkably for the plane frame structures. For the seismic waves with wave passage effect, the main peaks of frequency amplitude spectrum of seismic wave arise in low frequency domain.",
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"Force",
"Earthquakes",
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{
"affiliation": null,
"fullName": "Wang Yingli",
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{
"affiliation": null,
"fullName": "Liu Tielin",
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"fullName": "Liu Hong",
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"title": "2013 Fifth International Conference on Measuring Technology and Mechatronics Automation",
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"id": "12OmNwIpNpf",
"doi": "10.1109/ICMTMA.2013.256",
"title": "Study on a Passive Control System of Structural Seismic Responses",
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"abstract": "The intention of this paper was to design an effective and feasible method to control the seismic responses of structures within a safe range. Through the Shape Memory Alloy, this is achieved. In this paper, several tests were made to find out the impacts that temperature and max strain values may make on Shape Memory Alloy pseudo-elasticity effects, then, according to the experiment result, 2 kinds of Shape Memory Alloy dampers are designed and their mechanical performances are tested, after that, a passive seismic response control system is design using the dampers, at last, the control system was installed on the model of an actual high-rise structure, and the control effect was tested and proved to be well.",
"abstracts": [
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"content": "The intention of this paper was to design an effective and feasible method to control the seismic responses of structures within a safe range. Through the Shape Memory Alloy, this is achieved. In this paper, several tests were made to find out the impacts that temperature and max strain values may make on Shape Memory Alloy pseudo-elasticity effects, then, according to the experiment result, 2 kinds of Shape Memory Alloy dampers are designed and their mechanical performances are tested, after that, a passive seismic response control system is design using the dampers, at last, the control system was installed on the model of an actual high-rise structure, and the control effect was tested and proved to be well.",
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"keywords": [
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"fullName": "Zou Ying-Xian",
"givenName": "Zou",
"surname": "Ying-Xian",
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"affiliation": null,
"fullName": "Wang She-Liang",
"givenName": "Wang",
"surname": "She-Liang",
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{
"affiliation": null,
"fullName": "Lv Gang",
"givenName": "Lv",
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"abstract": "Based on three kinds of data, such as 3D Vertical Seismic Profile (VSP), multiple directional Walkaway VSP and full azimuth seismic data, the Vertical Transverse Isotropy (VTI) characteristics of plutonic igneous rock are studied, and an approach to calculate anisotropic parameter is presented. It is concluded that the target zone has apparent VTI characteristics. And then Addition of VTI anisotropic parameter can reduce the difference between forward move out and first break observation of reflection. It is also clearly that the anisotropic parameter estimated from multiple directional Walkaway VSP data is consistent with that from 3D VSP data.",
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"content": "Based on three kinds of data, such as 3D Vertical Seismic Profile (VSP), multiple directional Walkaway VSP and full azimuth seismic data, the Vertical Transverse Isotropy (VTI) characteristics of plutonic igneous rock are studied, and an approach to calculate anisotropic parameter is presented. It is concluded that the target zone has apparent VTI characteristics. And then Addition of VTI anisotropic parameter can reduce the difference between forward move out and first break observation of reflection. It is also clearly that the anisotropic parameter estimated from multiple directional Walkaway VSP data is consistent with that from 3D VSP data.",
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"fullName": "Xiang-e Sun",
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"fullName": "Yun Ling",
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"title": "Numerical Method for Transverse Seismic Response of Bridges Considering Poundings",
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"abstract": "Earthquake-induced structural pounding may result in considerable damage or even collapse of colliding structures during severe ground motions. The aim of the paper is to conduct a detailed investigation on pounding-involved transverse seismic response of bridges, paying a special attention to modeling the energy dissipation effects taking place during impact as well as observed in the structural behavior as the result of ground motion excitation. The contact force between girder and shear key is modeled by using Kelvin force-displacement law and linear damping function based on the assumption that the impacting bodies undergo local deformations and the contact forces are continuous. In a continuous analysis, the New mark computational method is employed to solve the motion equation during the period of contact. In this way, the girder-shear key pounding effects and bridge transverse seismic response can be gained.",
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"content": "Earthquake-induced structural pounding may result in considerable damage or even collapse of colliding structures during severe ground motions. The aim of the paper is to conduct a detailed investigation on pounding-involved transverse seismic response of bridges, paying a special attention to modeling the energy dissipation effects taking place during impact as well as observed in the structural behavior as the result of ground motion excitation. The contact force between girder and shear key is modeled by using Kelvin force-displacement law and linear damping function based on the assumption that the impacting bodies undergo local deformations and the contact forces are continuous. In a continuous analysis, the New mark computational method is employed to solve the motion equation during the period of contact. In this way, the girder-shear key pounding effects and bridge transverse seismic response can be gained.",
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"content": "Unconventional multi- and many-core processors (e.g., IBM® Cell B.E. ™ and NVIDIA® GPU) have emerged as effective accelerators in trial climate and weather simulations. Yet these climate and weather models typically run on parallel computers with conventional processors (e.g., Intel®, AMD®, and IBM) using Message Passing Interface (MPI). To address challenges involved in efficiently and easily connecting accelerators to parallel computers, we investigated using IBM’s Dynamic Application Virtualization (DAV) software in a prototype hybrid computing system with representative climate and weather model components. The hybrid system comprises 2 Intel blades and 2 IBM QS22 Cell B.E. blades, connected with both InfiniBand® (IB) and 1-Gigabit Ethernet. The system significantly accelerates a solar radiation model component by offloading compute-intensive calculations to the Cell blades. Systematic tests show that DAV can seamlessly offload compute-intensive calculations from Intel blades to Cell B.E. blades in a scalable, load-balanced manner. However, noticeable communication overhead was observed, mainly due to IP over IB protocol. Full utilization of IB Sockets Direct Protocol (SDP) and the lower latency production version of DAV will reduce this overhead.",
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"abstract": "This paper proposes an adaptive Markov chain pattern detection (AMCPD) method for disclosing the climate change patterns of Singapore through meteorological data mining. Meteorological variables, including daily mean temperature, mean dew point temperature, mean visibility, mean wind speed, maximum sustained wind speed, maximum temperature and minimum temperature are simultaneously considered for identifying climate change patterns in this study. The results depict various weather patterns from 1962 to 2011 in Singapore, based on the records of the Changi Meteorological Station. Different scenarios with varied cluster thresholds are employed for testing the sensitivity of the proposed method. The robustness of the proposed method is demonstrated by the results. It is observed from the results that the early weather patterns that were present from the 1960s disappear consistently across models. Changes in temporal weather patterns suggest long-term changes to the climate of Singapore which may be attributed in part to urban development, and global climate change on a larger scale. Our climate change pattern detection algorithm is proven to be of potential use for climatic and meteorological research as well as research focusing on temporal trends in weather and the consequent changes.",
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"abstract": "Brain-computer interfaces (BCI) come with a lot of issues, such as delays, bad recognition, long training times, and cumbersome hardware. Gamers are a large potential target group for this new interaction modality, but why would healthy subjects want to use it? BCI provides a combination of information and features that no other input modality can offer. But for general acceptance of this technology, usability and user experience will need to be taken into account when designing such systems. This paper discusses the consequences of applying knowledge from Human-Computer Interaction (HCI) to the design of BCI for games. The integration of HCI with BCI is illustrated by research examples and showcases, intended to take this promising technology out of the lab. Future research needs to move beyond feasibility tests, to prove that BCI is also applicable in realistic, real-world settings.",
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"title": "Toward real time image to mesh conversion for non rigid registration",
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"abstract": "In image guided neurosurgery, Magnetic Resonance Images (MRI) obtained before the procedure (pre-operative) provide extensive information which can help surgeons to plan a resection path. Current practices of neurosurgical resection involve the opening of the scull and the dura. This results in a deformation of the brain (known as the brain shift problem) which creates discrepancies between the pre-operative imaging data and the reality during the operation. A correction is possible using non-rigid registration of intra-operative MRI with pre-operative data. In this project, we target Finite Element (FE) based approaches for non-rigid registration. Real-time Image-to-Mesh (I2M) conversion is a critical component for FE-based non-rigid registration of brain images(Figure 1). I2M conversion should address three issues that affect the speed of registration: (1) Fidelity: how well the mesh boundary resembles the image boundary (2) Quality: how small the dihedral angles of the mesh elements are (3) Size: number of elements Previous work of our team has shown that low fidelity and quality decrease the speed of solver convergence. Also, the size of the output mesh affects the speed of both mesh creation and solver completion. We propose a new three dimensional I2M conversion algorithm based on Generalized Delaunay Refinement (GDR) techniques introduced by our team. The motivation for our current work is that most existing algorithms either do not offer guarantees on fidelity and quality or produce meshes with high number of elements. Our algorithm, on the contrary, lets users define the fidelity they desire and produces a mesh with guaranteed quality. Our algorithm does not require an initial triangulated surface: it recovers the image boundary while maintaining good quality at the same time. Most importantly, the desired fidelity do not impact the quality of the final mesh: our algorithm, for the given fidelity criteria, guarantees the best possible quality. We measure fidelity as the symmetric (2-sided) Hausdorff distance. Users are able to define an upper bound for this distance which can be arbitrarily close to zero (a zero upper bound means that the mesh boundary perfectly recovers the image boundary). We measure the quality rho of an element (tetrahedron) as its circumradius-to-shortest edge ratio. Our algorithm guarantees that the ratio for every element will be smaller than 1, which implies that all planar angles will be more than 30 degrees. This guarantee removes most of the small dihedral angles from the mesh. Unfortunately, slivers may survive. A sliver is a tetrahedron with good quality, but very small dihedral angles (Figure 2). Every time a Delaunay refinement procedure removes a sliver, it may introduce very short edges, thus compromising termination. We are eliminating slivers by employing an amortization technique: we ldquobuyrdquo short edges when we split a sliver, but we ldquopayrdquo back later stopping in this way the creation of even smaller edges.",
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{
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"content": "In image guided neurosurgery, Magnetic Resonance Images (MRI) obtained before the procedure (pre-operative) provide extensive information which can help surgeons to plan a resection path. Current practices of neurosurgical resection involve the opening of the scull and the dura. This results in a deformation of the brain (known as the brain shift problem) which creates discrepancies between the pre-operative imaging data and the reality during the operation. A correction is possible using non-rigid registration of intra-operative MRI with pre-operative data. In this project, we target Finite Element (FE) based approaches for non-rigid registration. Real-time Image-to-Mesh (I2M) conversion is a critical component for FE-based non-rigid registration of brain images(Figure 1). I2M conversion should address three issues that affect the speed of registration: (1) Fidelity: how well the mesh boundary resembles the image boundary (2) Quality: how small the dihedral angles of the mesh elements are (3) Size: number of elements Previous work of our team has shown that low fidelity and quality decrease the speed of solver convergence. Also, the size of the output mesh affects the speed of both mesh creation and solver completion. We propose a new three dimensional I2M conversion algorithm based on Generalized Delaunay Refinement (GDR) techniques introduced by our team. The motivation for our current work is that most existing algorithms either do not offer guarantees on fidelity and quality or produce meshes with high number of elements. Our algorithm, on the contrary, lets users define the fidelity they desire and produces a mesh with guaranteed quality. Our algorithm does not require an initial triangulated surface: it recovers the image boundary while maintaining good quality at the same time. Most importantly, the desired fidelity do not impact the quality of the final mesh: our algorithm, for the given fidelity criteria, guarantees the best possible quality. We measure fidelity as the symmetric (2-sided) Hausdorff distance. Users are able to define an upper bound for this distance which can be arbitrarily close to zero (a zero upper bound means that the mesh boundary perfectly recovers the image boundary). We measure the quality rho of an element (tetrahedron) as its circumradius-to-shortest edge ratio. Our algorithm guarantees that the ratio for every element will be smaller than 1, which implies that all planar angles will be more than 30 degrees. This guarantee removes most of the small dihedral angles from the mesh. Unfortunately, slivers may survive. A sliver is a tetrahedron with good quality, but very small dihedral angles (Figure 2). Every time a Delaunay refinement procedure removes a sliver, it may introduce very short edges, thus compromising termination. We are eliminating slivers by employing an amortization technique: we ldquobuyrdquo short edges when we split a sliver, but we ldquopayrdquo back later stopping in this way the creation of even smaller edges.",
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"Image Guided Neurosurgery",
"Magnetic Resonance Images",
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"Finite Element Based Approaches",
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"Amortization Technique",
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"Real Time Image To Mesh Conversion"
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"affiliation": "Dept. of Comput. Sci., Coll. of William&Mary, Williamsburg, VA, USA",
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{
"proceeding": {
"id": "13bd1eJgoia",
"title": "2018 IEEE Conference on Virtual Reality and 3D User Interfaces (VR)",
"acronym": "vr",
"groupId": "1000791",
"volume": "0",
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"year": "2018",
"__typename": "ProceedingType"
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"article": {
"id": "13bd1gQYgEs",
"doi": "10.1109/VR.2018.8446450",
"title": "Augmented Reality-Based Personalized Virtual Operative Anatomy for Neurosurgical Guidance and Training",
"normalizedTitle": "Augmented Reality-Based Personalized Virtual Operative Anatomy for Neurosurgical Guidance and Training",
"abstract": "This paper presents a novel augmented reality (AR) interactive environment for neurosurgical training. Comparing with traditional virtual reality based neurosurgical simulator, our system provides a more natural and intuitive fashion for surgeons. To achieve holographic visualization of virtual brain on 3D-printed skull (workspace), the first step is to reconstruct the personalized anatomy structure from segmented MR imaging. Then, tailored to the computational power of HoloLens, we employ the mass-spring method to model the mechanical response of brain. After that, a precise registration method is employed to map the virtual-real spatial information, which can overlay the virtual operative brain on workspace. In addition, bimanual haptic interface is also integrated into our simulator, which is more similar with real neurosurgery. In experiments, we conduct accuracy validation on our registration method, as well as the validity test on the developed simulators. The results demonstrate that our simulator can provide high-accuracy augmented visualization effects and deep immersion for novice surgeons.",
"abstracts": [
{
"abstractType": "Regular",
"content": "This paper presents a novel augmented reality (AR) interactive environment for neurosurgical training. Comparing with traditional virtual reality based neurosurgical simulator, our system provides a more natural and intuitive fashion for surgeons. To achieve holographic visualization of virtual brain on 3D-printed skull (workspace), the first step is to reconstruct the personalized anatomy structure from segmented MR imaging. Then, tailored to the computational power of HoloLens, we employ the mass-spring method to model the mechanical response of brain. After that, a precise registration method is employed to map the virtual-real spatial information, which can overlay the virtual operative brain on workspace. In addition, bimanual haptic interface is also integrated into our simulator, which is more similar with real neurosurgery. In experiments, we conduct accuracy validation on our registration method, as well as the validity test on the developed simulators. The results demonstrate that our simulator can provide high-accuracy augmented visualization effects and deep immersion for novice surgeons.",
"__typename": "ArticleAbstractType"
}
],
"normalizedAbstract": "This paper presents a novel augmented reality (AR) interactive environment for neurosurgical training. Comparing with traditional virtual reality based neurosurgical simulator, our system provides a more natural and intuitive fashion for surgeons. To achieve holographic visualization of virtual brain on 3D-printed skull (workspace), the first step is to reconstruct the personalized anatomy structure from segmented MR imaging. Then, tailored to the computational power of HoloLens, we employ the mass-spring method to model the mechanical response of brain. After that, a precise registration method is employed to map the virtual-real spatial information, which can overlay the virtual operative brain on workspace. In addition, bimanual haptic interface is also integrated into our simulator, which is more similar with real neurosurgery. In experiments, we conduct accuracy validation on our registration method, as well as the validity test on the developed simulators. The results demonstrate that our simulator can provide high-accuracy augmented visualization effects and deep immersion for novice surgeons.",
"fno": "08446450",
"keywords": [
"Augmented Reality",
"Biomedical Education",
"Biomedical MRI",
"Brain",
"Computer Based Training",
"Haptic Interfaces",
"Image Registration",
"Image Segmentation",
"Medical Image Processing",
"Neurophysiology",
"Surgery",
"Augmented Reality Based Personalized Virtual Operative Anatomy",
"Neurosurgical Guidance",
"Augmented Reality Interactive Environment",
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"Holographic Visualization",
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"3 D Printed Skull",
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"Brain Modeling",
"Solid Modeling",
"Three Dimensional Displays",
"Human Centered Computing Visualization Visualization Techniques Augmented Reality",
"Human Centered Computing Visualization Surgical Simulation"
],
"authors": [
{
"affiliation": "Chinese Academy of Sciences, Shenzhen Institutes of Advanced Technology",
"fullName": "Weixin Si",
"givenName": "Weixin",
"surname": "Si",
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{
"affiliation": "Chinese Academy of Sciences, Shenzhen Institutes of Advanced Technology",
"fullName": "Xianavun Liao",
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},
{
"affiliation": "Chinese Academy of Sciences, Shenzhen Institutes of Advanced Technology",
"fullName": "Qiong Wang",
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"surname": "Wang",
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},
{
"affiliation": "Department of Computer Science and Engineering, The Chinese University of Hong Kong",
"fullName": "Phena-Ann Heng",
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"surname": "Heng",
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}
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"id": "proceedings/bibe/2017/1324/0/132401a021",
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"id": "proceedings/ismar-adjunct/2017/6327/0/6327a279",
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"abstract": "The analysis of shape-variations due to changes in facial expression and gender difference is a key problem in face recognition. In this paper, we draw on ideas from the field of statistical shape analysis to construct shape-spaces that span facial expressions and gender, and use the resulting shape-model to perform face recognition under varying expression and gender. Our novel contribution is to show how to construct shape-spaces over fields of surface normals rather than Cartesian landmark points. According to this model face needle-maps (or fields of surface normals) are points in a high-dimensional manifold referred to as a shape-space. The similarity between faces and gender difference is measured using a number of alternative geodesic, Euclidean and cosine distance between points on the manifold. In a recognition experiment we compare the perfomance distance with Euclidean, cosine and geodesic distance associated with the shape manifold. Here we explore if the distances used to distinguish gender and recognise the same for under different expressions.",
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"title": "IEEE International Conference on Shape Modeling and Applications",
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"abstract": "The distribution of geometric features is anisotropic by its nature. Intrinsic properties of surfaces such as normal curvatures, for example, varies with direction. In this paper this characteristic of a shape is used to create a new anisotropic geodesic (AG) distance map on parametric surfaces. We first define local distance (LD) from a point as a function of both the surface point and a unit direction in its tangent plane and then define a total distance as an integral of that local distance. The AG distance between points on the surface is then defined as their minimum total distance. The path between the points that attains the minimum is called the anisotropic geodesic path. This differs from the usual geodesic in ways that enable it to better reveal geometric features. Minimizing total distances to attain AG distance is performed by associating the LD function with the tensor speed function that controls wave propagation of the convex Hamilton-Jacobi (H-J) equation solver. We present two different, but related metrics for the local distance function, a curvature tensor and a difference curvature tensor. Each creates a different AG distance. Some properties of both new AG distance maps are presented, including parametrization invariance. We then demonstrate the effectiveness of the proposed geodesic map as a shape discriminator in several applications, including surface segmentation and partial shape matching.",
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"content": "The distribution of geometric features is anisotropic by its nature. Intrinsic properties of surfaces such as normal curvatures, for example, varies with direction. In this paper this characteristic of a shape is used to create a new anisotropic geodesic (AG) distance map on parametric surfaces. We first define local distance (LD) from a point as a function of both the surface point and a unit direction in its tangent plane and then define a total distance as an integral of that local distance. The AG distance between points on the surface is then defined as their minimum total distance. The path between the points that attains the minimum is called the anisotropic geodesic path. This differs from the usual geodesic in ways that enable it to better reveal geometric features. Minimizing total distances to attain AG distance is performed by associating the LD function with the tensor speed function that controls wave propagation of the convex Hamilton-Jacobi (H-J) equation solver. We present two different, but related metrics for the local distance function, a curvature tensor and a difference curvature tensor. Each creates a different AG distance. Some properties of both new AG distance maps are presented, including parametrization invariance. We then demonstrate the effectiveness of the proposed geodesic map as a shape discriminator in several applications, including surface segmentation and partial shape matching.",
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