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"abstract": "A robust globally asymptotically stabilizing feedback law is proposed for the control of rotating stall and surge in axial flow compressors. This is done in two steps. First, a globally asymptotically stabilizing parameterized feedback is proposed. Then a numerical design procedure is developed to compute the feedback parameters in accordance with some pre-specified robustness criteria. Simulations are proposed to validate the proposed schemes.",
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"abstract": "A comparison study on land cover classification and landscape characteristics, using NOAA/AVHRR digital images of 3 different spatial resolutions (1 km pixel, 4 km pixel, 8 km pixel), is performed in this paper on the vegetation in temperate grassland region in the west of the Northeast China Transect (NECT). Particular emphasis is being put on a comparison of the boundary consistency and spatial difference of the classification result from using remotely sensed data at 3 different spatial resolutions, and the difference of the landscape pattern revealed by the images. This paper establishes a basis for the further study at different scales on the landscape change process. The study shows: (1) the macro spatial pattern of the region land cover revealed by images of 3 different spatial resolutions is consistent, but the boundary of the land cover type and the shape and the number of patches of each type differs greatly. (2) It is shown by the comparison of four indexes (fractal dimension, fragmentation, diversity, and dominance) that the structure of landscape changes greatly with the decrease of spatial resolution as revealed by images. And the fractal dimension of each cover type shows the most obvious variations, which indicates the change of spatial resolution contributes most to the patch complexity.",
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"title": "Multi-modal face image super-resolutions in tensor space",
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"abstract": "Face images of non-frontal views under poor illumination with low resolution reduce dramatically face recognition accuracy. To overcome these problems, super-resolution techniques can be exploited. In this paper, we present a Bayesian framework to perform multi-modal (such as variations in viewpoint and illumination) face image super-resolutions in tensor space. Given a single modal low-resolution face image, we benefit from the multiple factor interactions of training tensor, and super-resolve its high-resolution reconstructions across different modalities. Instead of performing pixel-domain super-resolutions, we reconstruct the high-resolution face images by computing a maximum likelihood identity parameter vector in high-resolution tensor space. Experiments show promising results of multi-view and multi-illumination face image super-resolutions respectively.",
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"title": "Evaluation and enhancement of weather application performance on Blue Gene/Q",
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"abstract": "Numerical weather prediction (NWP) models use mathematical models of the atmosphere to predict the weather. Ongoing efforts in the weather and climate community continuously try to improve the fidelity of weather models by employing higher order numerical methods suitable for solving model equations at high resolutions. In realistic weather forecasting scenario, simulating and tracking multiple regions of interest (nests) at fine resolutions is important in understanding the interplay between multiple weather phenomena and for comprehensive predictions. These multiple regions of interest in a simulation can be significantly different in resolution and other modeling parameters. Currently, the weather simulations involving these nested regions process them one after the other in a sequential fashion. There exists a lot of prior work in performance evaluation and optimization of weather models, however most of this work is either limited to simulations involving a single domain or multiple nests with same resolution and model parameters such as model physics options. In this paper, we evaluate and enhance the performance of popular WRF model on IBM Blue Gene/Q system. We consider nested simulations with multiple child domains and study how parameters such as physics options and simulation time steps for child domains affect the computational requirements. We also analyze how such configurations can benefit from parallel execution of the children domains rather than processing them sequentially. We demonstrate that it is important to allocate processors to nested child domains in proportion to the work load associated with them when executing them in parallel. This ensures that the time spent in the different nested simulations is nearly equal, and the nested domains reach the synchronization step with the parent simulation together. Our experimental evaluation using a simple heuristic for allocation of nodes shows that the performance of WRF simulations can be improved by up to 14% by parallel execution of sibling domains with different configuration of domain sizes, temporal resolutions and physics options.",
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{
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"content": "Numerical weather prediction (NWP) models use mathematical models of the atmosphere to predict the weather. Ongoing efforts in the weather and climate community continuously try to improve the fidelity of weather models by employing higher order numerical methods suitable for solving model equations at high resolutions. In realistic weather forecasting scenario, simulating and tracking multiple regions of interest (nests) at fine resolutions is important in understanding the interplay between multiple weather phenomena and for comprehensive predictions. These multiple regions of interest in a simulation can be significantly different in resolution and other modeling parameters. Currently, the weather simulations involving these nested regions process them one after the other in a sequential fashion. There exists a lot of prior work in performance evaluation and optimization of weather models, however most of this work is either limited to simulations involving a single domain or multiple nests with same resolution and model parameters such as model physics options. In this paper, we evaluate and enhance the performance of popular WRF model on IBM Blue Gene/Q system. We consider nested simulations with multiple child domains and study how parameters such as physics options and simulation time steps for child domains affect the computational requirements. We also analyze how such configurations can benefit from parallel execution of the children domains rather than processing them sequentially. We demonstrate that it is important to allocate processors to nested child domains in proportion to the work load associated with them when executing them in parallel. This ensures that the time spent in the different nested simulations is nearly equal, and the nested domains reach the synchronization step with the parent simulation together. Our experimental evaluation using a simple heuristic for allocation of nodes shows that the performance of WRF simulations can be improved by up to 14% by parallel execution of sibling domains with different configuration of domain sizes, temporal resolutions and physics options.",
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"affiliation": "Universiti Brunei Darussalam, Brunei",
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"abstract": "Colors are displayed in different ways on various devices, such as cameras, screens and printers. In order to achieve consistent appearance on these devices, color management is usually used, where the core part is Gamut Mapping Algorithm (GMA). However, the widely adopted Point-wise Gamut Mapping Algorithms (PGMAs) have been restricted to compromise between color accuracy and details. In this work, we firstly split color space into small cubes through sampling colors from it. Then, we built a 26-neighbored graph with the sample colors as vertexes and perceptual color differences between adjacent vertexes as weights. Based on the above graph, a new Multi-source Shortest Paths Algorithm (MSS-PA) is proposed to establish color mapping relationships between out-of-gamut colors and colors in gamut boundary. In the MSSPA, distance of shortest path between nonadjacent vertexes are used to replace those calculated directly using CIEDE2000, which is useful to measure large color difference. Experimental results show that our method achieves superior performance on the aspect of keeping accuracy and preserving details compared with HPMinDE and SGCK.",
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"abstract": "Although traditional line illustrations are veryabstract representations, they can communicate the form of an object effectively. This is only possible by the use of perceptual cues, mastered by professional artists. To create effective line illustrations from 3D models, it is important to use these perceptual cues to avoid visual dissonance and ambiguity, and also to create visual effects like shading, emphasis and depth perception. In this paper, we propose the adaptation of a technique called Perspective Contouring, used by illustrators to create emphasis in contour line drawings. The technique uses perceptual principles to manipulate line attributes, like width,spacing and length, around regions of interest determinedby the user, creating the illusion that those regions advance towards the observer. The whole process is controlled through an intuitive sketch-based interface.",
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"content": "Although traditional line illustrations are veryabstract representations, they can communicate the form of an object effectively. This is only possible by the use of perceptual cues, mastered by professional artists. To create effective line illustrations from 3D models, it is important to use these perceptual cues to avoid visual dissonance and ambiguity, and also to create visual effects like shading, emphasis and depth perception. In this paper, we propose the adaptation of a technique called Perspective Contouring, used by illustrators to create emphasis in contour line drawings. The technique uses perceptual principles to manipulate line attributes, like width,spacing and length, around regions of interest determinedby the user, creating the illusion that those regions advance towards the observer. The whole process is controlled through an intuitive sketch-based interface.",
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"content": "In this paper, we proposed an automated load patterns classification technique to detect potentially non-safe power lines to prevent the power failure and to control the power distribution system efficiently. In operating power distribution, if there is overload in the fixed load capability of a power line, the power line will be breakdown, and that accident causes significant financial damages. For the prevention of power cut, we extracted the load shape feature according to the characteristic of electric consumption in Korea, and detected the anomalous patterns of non-safe power lines group using classifier based on EPs (emerging patterns) [1]. The discovered EPs have high support in non-safe power lines group and have low support in the normal group. In order to evaluate our classification method, power load data and information of 401 power lines are used during Feb. 2007, and compared with several existing classification methods. As a result of our experiments, the overall accuracy of EPs-based classification method about power load data was turned out to be about 91.75%. And the accuracy of non-safe power line group was about 96%.",
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"abstract": "This paper explores the relation between the structured parallelism exposed by the decomposable BSP (D-BSP) model through submachine locality and locality of reference in multi-level cache hierarchies. Specifically, an efficient cache-oblivious algorithm is developed to simulate D-BSP programs on the ideal cache model (ICM). The effectiveness of the simulation is proved by showing that optimal cache-oblivious algorithms for prominent problems can be obtained from D-BSP algorithms. Finally, a tight relation between optimality in the D-BSP and ICM models is established.",
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"content": "Virtualization is often used in systems for the purpose of offering isolation among applications running in separate virtual machines (VM). Current virtual machine monitors (VMMs) have done a decent job in resource isolation in memory, CPU and I/O devices. However, when looking further into the usage of lower-level shared cache, we notice that one virtual machine’s cache behavior may interfere with another’s due to the uncontrolled cache sharing. In this situation, performance isolation cannot be guaranteed. This paper presents a cache partitioning approach which can be implemented in the VMM. We have implemented this mechanism in Xen VMM using the page coloring technique traditionally applied to the OS. Our VMM-based implementation is fully transparent to the guest OSes. It thus shows the advantages of simplicity and flexibility. Our evaluation shows that our cache partitioning method can work efficiently and improve the performance of co-scheduled applications running within different VMs. In the concurrent workloads selected from the SPEC CPU 2006 benchmarks, our technique achieves a performance improvement by up to 19% for the most sensitive workloads",
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"fullName": "Zhenlin Wang",
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"title": "Dynamic Fair Cache Partitioning for Chip Multiprocessor",
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"abstract": "Fairness is a critical issue because of some serious problems, such as thread starvation and priority inversion, it can arise and render the Operating System (OS) scheduler ineffective if no fair cache sharing which provided by the hardware. In order to improve the fairness of shared cache between threads in a chip multiprocessor, a dynamic fair partitioning policy of shared cache is proposed in this paper. There are threads sharing cache and simulating that it runs alone with a dedicated cache. At the end of each time interval T, policy evaluates the metrics of threads on shared and dedicated cache, then repartition cache to improve the fairness. Experimental data show that the dynamic fair partitioning policy of shared cache compared with LRU or other partitioning of shared cache can effectively enhance fairness and throughput has slightly increased for chip multiprocessor.",
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"fullName": "Juan Fang",
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"affiliation": "King Abdulaziz University,Information Technology Department,Jeddah,KSA",
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"content": "Electrostatic detection devices can detect humans by measuring changes in an electrostatic field to indicate the precise location and direction of the subject entity. To analyse the principle of the electrostatic detection system, the mechanisms for generating the human beings' bioelectrical phenomenon are analysed. The human being is regarded as a point charge and constitutes a system with the obstacle and the air. Based on the principle of static induction, the human is detected through the obstacle. The distribution of the human body's electric field is studied using the image method. And the mathematical formula of the point charge's electric potential in this system is developed. Accordingly, the mathematical model of this human detection system through the medium is established and tested by using MATLAB. And the detection principle of electrostatic detector through medium is introduced. It is concluded that the thickness and dielectric constant of the medium are in an inverse relationship with the goal's electric-field intensity through the medium. It is proved by the experiment that it is feasible using electrostatic detector to detect human beings through the medium.",
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"abstract": "Lateral moving-electrode type electric field (LMEF) was a new upgrading technique for electrostatic precipitator (ESP) and obtained excellent effect in application for its advanced mechanism, feasibility and economic. Modeling on the ESP of Hebei Iron &Steel Group, this paper has numerically simulated the effect of LMEF on resistance and airflow distribution of the ESP. The results indicated that LMEF has almost no influence upon resistance increasing but market effect on airflow distribution.",
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"content": "Lateral moving-electrode type electric field (LMEF) was a new upgrading technique for electrostatic precipitator (ESP) and obtained excellent effect in application for its advanced mechanism, feasibility and economic. Modeling on the ESP of Hebei Iron &Steel Group, this paper has numerically simulated the effect of LMEF on resistance and airflow distribution of the ESP. The results indicated that LMEF has almost no influence upon resistance increasing but market effect on airflow distribution.",
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"article": {
"id": "12OmNCcbEkj",
"doi": "10.1109/CSSE.2008.822",
"title": "A New Electrostatic Field Termination Criterion for Evolutionary Algorithm",
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"abstract": "With the ideas of the classic electrostatic field, a new electrostatic field termination criterion for Evolutionary Algorithm is proposed in this paper. We get a new Electrostatic Field Evolutionary Algorithm model as follow: The searching region of the object-function is regard as a metal conductor first; then all the individuals are considered as the free metal ions; moreover we take the object-function F(x) as the electrostatic field E surrounding the metal conductor. Finally, we give a new electrostatic field termination criterion with the classic electrostatic field theory. The new algorithm is used to solve some global optimal problems and satisfactory numerical results are achieved. The results show it can converge to the global minimum quickly and reduce the evaluations effectively.",
"abstracts": [
{
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"content": "With the ideas of the classic electrostatic field, a new electrostatic field termination criterion for Evolutionary Algorithm is proposed in this paper. We get a new Electrostatic Field Evolutionary Algorithm model as follow: The searching region of the object-function is regard as a metal conductor first; then all the individuals are considered as the free metal ions; moreover we take the object-function F(x) as the electrostatic field E surrounding the metal conductor. Finally, we give a new electrostatic field termination criterion with the classic electrostatic field theory. The new algorithm is used to solve some global optimal problems and satisfactory numerical results are achieved. The results show it can converge to the global minimum quickly and reduce the evaluations effectively.",
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"normalizedAbstract": "With the ideas of the classic electrostatic field, a new electrostatic field termination criterion for Evolutionary Algorithm is proposed in this paper. We get a new Electrostatic Field Evolutionary Algorithm model as follow: The searching region of the object-function is regard as a metal conductor first; then all the individuals are considered as the free metal ions; moreover we take the object-function F(x) as the electrostatic field E surrounding the metal conductor. Finally, we give a new electrostatic field termination criterion with the classic electrostatic field theory. The new algorithm is used to solve some global optimal problems and satisfactory numerical results are achieved. The results show it can converge to the global minimum quickly and reduce the evaluations effectively.",
"fno": "3336a337",
"keywords": [
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"Electrostatic Equilibrium",
"Evolutionary Algorithm"
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"affiliation": null,
"fullName": "Sheng Peng",
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"surname": "Peng",
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"affiliation": null,
"fullName": "YuanXiang Li",
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