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"abstract": "The CORVETTE project aims at producing significant innovations in the field of collaborative virtual training. For that purpose, CORVETTE combines various technologies to enhance the effective collaboration between users and virtual humans performing a common task. First, CORVETTE proposes a model of collaborative interaction in virtual environments allowing actors to efficiently collaborate as a team whether they are controlled by a user or by a virtual human [4]. Moreover, the environment is simulated in realtime, at real scale and is using physics as well as physically-based humanoids to improve the realism of the training. Second, thanks to the interaction model, we defined a protocol of exchange of avatars [5, 3, 2]. Thus, an actor can dynamically exchange the control of his/her avatar with the one controlled by another user or by a virtual agent. Moreover, to improve the exchange protocol, we designed a new knowledge model embedded in each avatar. It allows users and virtual humans to retrieve knowledge previously gathered by an avatar following an exchange. The preservation of knowledge is indeed especially crucial for teamwork. Finally, we handle verbal communication between users and virtual humans with speech recognition and synthesis. Actors' knowledge is enhanced through dialogue and used for decision-making and conversation [1].",
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"content": "The CORVETTE project aims at producing significant innovations in the field of collaborative virtual training. For that purpose, CORVETTE combines various technologies to enhance the effective collaboration between users and virtual humans performing a common task. First, CORVETTE proposes a model of collaborative interaction in virtual environments allowing actors to efficiently collaborate as a team whether they are controlled by a user or by a virtual human [4]. Moreover, the environment is simulated in realtime, at real scale and is using physics as well as physically-based humanoids to improve the realism of the training. Second, thanks to the interaction model, we defined a protocol of exchange of avatars [5, 3, 2]. Thus, an actor can dynamically exchange the control of his/her avatar with the one controlled by another user or by a virtual agent. Moreover, to improve the exchange protocol, we designed a new knowledge model embedded in each avatar. It allows users and virtual humans to retrieve knowledge previously gathered by an avatar following an exchange. The preservation of knowledge is indeed especially crucial for teamwork. Finally, we handle verbal communication between users and virtual humans with speech recognition and synthesis. Actors' knowledge is enhanced through dialogue and used for decision-making and conversation [1].",
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"abstract": "Using analytic method to analyze the change rule of cutting force fall across hardness,because it relate to non-linear problem that is perplexing. Base on software deform, infection factors were simulated in the process of cutting.The factors cutting include deepness and reamer angle and enter measure. The Simulation get the result that include the influence of the factors and the change rule of cutting force. To The analysis and the simulation of the cuts process through the finite element software that is helpful in optimizes the geometry parameter of the cutting tool and the processing craft parameter choice, exert the efficiency of machine tool farthest. Has saved the cutting tool, the material and laboratory uses experimental expense and so on, reduced the experimental cycle. It has found the new more effective modernized tool for the cutting rule.",
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"abstract": "The diversity of osteotomy brings an obstacle to young experienceless surgeon to make preoperative plan. Computer-aided technique gives the birth of virtual osteotomy which assists surgeon with preoperative simulation of osteotomies in a visualized manner. However, the traditional cutting algorithm cannot meet the diverse demand of virtual osteotomies. This paper presents a prism cutting algorithm inspired by planar clipping. The proposed algorithm regards the cutting track of virtual surgical knife as the cutting intersection of a polygonal prism and a triangular mesh model. First, the geometrical property of cut sections of variant osteotomies is analyzed. Then, the spatial situations of triangle facet and prism constructed by interactive way are determined respectively. Finally, five kinds of craniofacial osteotomies are simulated. The results show that the proposed algorithms can handle effectively variant complex virtual osteotomies and provide further assistance with a preoperative guidance.",
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"content": "The diversity of osteotomy brings an obstacle to young experienceless surgeon to make preoperative plan. Computer-aided technique gives the birth of virtual osteotomy which assists surgeon with preoperative simulation of osteotomies in a visualized manner. However, the traditional cutting algorithm cannot meet the diverse demand of virtual osteotomies. This paper presents a prism cutting algorithm inspired by planar clipping. The proposed algorithm regards the cutting track of virtual surgical knife as the cutting intersection of a polygonal prism and a triangular mesh model. First, the geometrical property of cut sections of variant osteotomies is analyzed. Then, the spatial situations of triangle facet and prism constructed by interactive way are determined respectively. Finally, five kinds of craniofacial osteotomies are simulated. The results show that the proposed algorithms can handle effectively variant complex virtual osteotomies and provide further assistance with a preoperative guidance.",
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"fullName": "Jianyu Shi",
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"fullName": "Peifang Zhai",
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"fullName": "Yanning Zhang",
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"fullName": "Hong Zhou",
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"abstract": "Current simulations of surgical procedures do not provide haptic feedback of cutting forces felt while using surgical scissors. We have designed and tested \"haptic scissors,\" an interface that can display forces to a user grasping Metzenbaum scissor handles. By filtering and scaling cutting data obtained in previous work, we have created haptic virtual environments that can simulate the cutting of rat skin, liver, and tendon, as well as empty scissors. Preliminary perceptual experiments showed that the users rank the stiffness of real and virtual tissues similarly. Tests also demonstrated that users are not generally adept at identifying tissue types by haptic feedback in either real or virtual domains. The use of \"haptic recordings,\" rather than reality-based models, was simple and computationally efficient. However, the simulations lack flexibility because only the exact information obtained during data acquisition can be displayed.",
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"affiliation": "Georgia Institute of Technology",
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"abstract": "Based on the previous study, this paper presents a generalized simulation algorithm of cutting forces prediction for inserted cutters. The tool nose radius is taken into consideration and the average cutting coefficient model is adopted. The simulation algorithm and related software are developed. Cutting forces for milling cutters with polygon inserts, circular inserts or convex triangular inserts can be predicted. The simulation algorithm has been experimentally verified when milling Al LC4 at various cutting conditions.",
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"abstract": "Abstract: This paper discusses key techniques of the deformation and cutting in virtual surgery. It introduces a new geometry reconstruction algorithm, which can get layered tetrahedron based volume model. Based on the real physical property of soft-tissue, a simplified viscoelastic physical model is introduced, and the finite element method is used for the deformation computation. Different from the collision between rigid bodies, in virtual surgery environment the collision happens usually between rigid body and soft body. This paper brings forward a FDH based bounding volume hierarchy algorithm to handle the collision detection successfully. In order to simulate the cutting operation, a global cutting algorithm is introduced. The 3-D texture mapping is used to enhance the realistic effect.",
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"content": "Abstract: This paper discusses key techniques of the deformation and cutting in virtual surgery. It introduces a new geometry reconstruction algorithm, which can get layered tetrahedron based volume model. Based on the real physical property of soft-tissue, a simplified viscoelastic physical model is introduced, and the finite element method is used for the deformation computation. Different from the collision between rigid bodies, in virtual surgery environment the collision happens usually between rigid body and soft body. This paper brings forward a FDH based bounding volume hierarchy algorithm to handle the collision detection successfully. In order to simulate the cutting operation, a global cutting algorithm is introduced. The 3-D texture mapping is used to enhance the realistic effect.",
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"normalizedAbstract": "Abstract: This paper discusses key techniques of the deformation and cutting in virtual surgery. It introduces a new geometry reconstruction algorithm, which can get layered tetrahedron based volume model. Based on the real physical property of soft-tissue, a simplified viscoelastic physical model is introduced, and the finite element method is used for the deformation computation. Different from the collision between rigid bodies, in virtual surgery environment the collision happens usually between rigid body and soft body. This paper brings forward a FDH based bounding volume hierarchy algorithm to handle the collision detection successfully. In order to simulate the cutting operation, a global cutting algorithm is introduced. The 3-D texture mapping is used to enhance the realistic effect.",
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"fullName": "Jiao-Ying Shi",
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"fullName": "Li-Xia Yan",
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"proceeding": {
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"title": "2009 Fifth International Conference on Natural Computation",
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"doi": "10.1109/ICNC.2009.221",
"title": "Cellular Automata Algorithm for Waterjet Cutting Simulation",
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"abstract": "An improved two dimensional cellular automata (CA) algorithm for simulating the process of waterjet cutting is presented. The algorithm has three key rules, first is the evolutionary rule of the jet cell, which is deduced by the jet velocity theory, and the second is the material cell erosion rule which is concluded by the energy erosion model, another is the input rule of the waterjet energy, which is expressed with a dynamic moving algorithm. The CA algorithm designed in the paper could simulate the cutting process entirely. The simulation results are verified with several instances, and lag distance of the jet in the simulations are compared with the experiments, which show that the two dimensional CA model is an effective method to simulate waterjet cutting.",
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"fullName": "Wu Jinghua",
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"abstract": "We developed a system for augmented reality visualization of ultrasound images. This system is based on our earlier \"augmented workspace\" setup. The user wears a custom video-see-through head-mounted display (HMD). Two color video cameras attached to the HMD provide a stereo view of the scene. A third head-mounted video camera is added for tracking. A set of markers is attached to the ultrasound transducer; a set of stationary markers can be positioned above the workspace. The system runs at the full 30Hz video frame rate with a latency of about 0.1 sec, generating a stable augmentation with no apparent jitter visible in the composite images. Three SGI Visual Workstations provide the computing power for the system. In this paper we describe the details of the system, its calibration with a configuration of optical markers partially immersed in a water bath, and some system features like spatiotemporal freezing and 3D target localization that promise to be helpful for practical applications.",
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"abstract": "Visualization has been taking a role of much importance in both science and business areas. For scientists, visualization is a method to gain the meaning of and insight from scientific data and computational results; for business marketing area, computer visualization is popular as a digital signage technology. Recently, tiled display wall (TDW) has gathered users' attention and concern as a promising large-scale visualization technique. SAGE (Scalable Adaptive Graphics Environment) is a representative middleware for realizing such a TDW and experimentally used in an inquisitive way at research institutions and universities. However, this SAGE has an undesirable problem that existent X-window based visualization applications are not displayed without source code modification, although it provides a suite of APIs with which developers can write visualization applications displayed on the SAGE-enabled TDW. In this paper, we present an adapter solution that allows users to display X-window application on the SAGE-based TDW without source code modification. In our evaluation, the developed adapter solution incurred a small overhead in displaying an X application onto a SAGE-enabled TDW, in comparison with the case of modifying the source code of it.",
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"affiliation": "School of Computing and Information Sciences, Florida International University, Miami, FL 33199, U.S.A.",
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"abstract": "The Perona Malik filter forms the base for various classical diffusion filters. It takes its origin from the heat equation. The images undergo an iterative diffusion process and the noise is removed gradually after each iteration. The basic concept behind various prominent image processing methods like image smoothing, enhancement, denoising etc is mostly based upon PM equation. But the main drawback of the PM diffusion model is the new features appearing in the processed image. In this work the main focus is on alternating between linear and nonlinear smoothing according to the image features. Numerical experiments carried out prove the efficiency of this scheme for edge detection. It also gives better perceptual quality for the processed images in contrast to basic PM or TV model.",
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"abstract": "Prior work in programming-by-demonstration (PBD) has explored ways to enable end-users to create custom automation without needing to write code. We propose a new end-user specification model – asking the end-user to explicitly identify parts of their natural language query that can be generalized. We built a PBD system, ParamMacros, where users first generalize a concrete natural language question – identifying parameters and their possible values – and then create a demonstration of how to answer the question on the website of interest. ParamMacros then infers a generalized program by using the user-provided parameter values to identify relevant patterns in the website’s structure. In a lab study we found that participants were able to meaningfully parameterize natural language queries and felt such a parameterization and demonstration process would be useful for creating custom automation.",
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"doi": "10.1109/WCMEIM48965.2019.00070",
"title": "Simulation of Liquid Atomization in Cyclone Atomizer Based on VOF-DPM Coupling Model",
"normalizedTitle": "Simulation of Liquid Atomization in Cyclone Atomizer Based on VOF-DPM Coupling Model",
"abstract": "The atomizer is the key equipment in the oil mist lubrication system. Currently, the system usually use venturi tubes for atomization, but the efficiency is not high. In this paper, a cyclone atomizer was used as the research object. The vof-dpm Coupling model, the new module in Fluent 19.0, was used to simulate the atomization process of gasoline from continuous phase to discrete phase. The velocity distribution at different cross sections of the cyclone atomizer was calculated, and the velocity variation regulation of air and gasoline interation was summarized. In addition, the diameter distribution of gasoline droplets was obtained. The diameter was between 3 micrometers and 150 micrometers so that the atomization performance of cyclone atomizer is good. The results of this study provide a reference for the optimal design of the atomizer.",
"abstracts": [
{
"abstractType": "Regular",
"content": "The atomizer is the key equipment in the oil mist lubrication system. Currently, the system usually use venturi tubes for atomization, but the efficiency is not high. In this paper, a cyclone atomizer was used as the research object. The vof-dpm Coupling model, the new module in Fluent 19.0, was used to simulate the atomization process of gasoline from continuous phase to discrete phase. The velocity distribution at different cross sections of the cyclone atomizer was calculated, and the velocity variation regulation of air and gasoline interation was summarized. In addition, the diameter distribution of gasoline droplets was obtained. The diameter was between 3 micrometers and 150 micrometers so that the atomization performance of cyclone atomizer is good. The results of this study provide a reference for the optimal design of the atomizer.",
"__typename": "ArticleAbstractType"
}
],
"normalizedAbstract": "The atomizer is the key equipment in the oil mist lubrication system. Currently, the system usually use venturi tubes for atomization, but the efficiency is not high. In this paper, a cyclone atomizer was used as the research object. The vof-dpm Coupling model, the new module in Fluent 19.0, was used to simulate the atomization process of gasoline from continuous phase to discrete phase. The velocity distribution at different cross sections of the cyclone atomizer was calculated, and the velocity variation regulation of air and gasoline interation was summarized. In addition, the diameter distribution of gasoline droplets was obtained. The diameter was between 3 micrometers and 150 micrometers so that the atomization performance of cyclone atomizer is good. The results of this study provide a reference for the optimal design of the atomizer.",
"fno": "504500a323",
"keywords": [
"Computational Fluid Dynamics",
"Drops",
"Flow Simulation",
"Lubricating Oils",
"Multiphase Flow",
"Nozzles",
"Numerical Analysis",
"Petroleum",
"Sprays",
"Two Phase Flow",
"Oil Mist Lubrication System",
"Cyclone Atomizer",
"Atomization Performance",
"Liquid Atomization",
"VOF DPM Coupling Model",
"VOF Dpm Coupling Model",
"Size 3 0 A To 150 0 A",
"Analytical Models",
"Mechanical Engineering",
"Liquids",
"Numerical Simulation",
"Couplings",
"Numerical Models",
"Liquid Atomization",
"Liquid Film Fracture",
"Numerical Simulation",
"CFD Method",
"VOF DPM Coupling Model"
],
"authors": [
{
"affiliation": "Beijing University of Chemical Technology, China",
"fullName": "Yunhao Xiao",
"givenName": "Yunhao",
"surname": "Xiao",
"__typename": "ArticleAuthorType"
},
{
"affiliation": "Beijing University of Chemical Technology, China",
"fullName": "Wenbin Liu",
"givenName": "Wenbin",
"surname": "Liu",
"__typename": "ArticleAuthorType"
},
{
"affiliation": "Beijing Anlian Guoke Technology Consulting Co., Ltd., China",
"fullName": "Dequan Liu",
"givenName": "Dequan",
"surname": "Liu",
"__typename": "ArticleAuthorType"
}
],
"idPrefix": "wcmeim",
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"pubDate": "2019-11-01T00:00:00",
"pubType": "proceedings",
"pages": "323-327",
"year": "2019",
"issn": null,
"isbn": "978-1-7281-5045-1",
"notes": null,
"notesType": null,
"__typename": "ArticleType"
},
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