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检索条件"任意字段=10th International Conference on Computer-Aided Design and Computer Graphics"

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Hierarchical Mesh Segmentation Based on Quadric Surface Fitting

Hierarchical Mesh Segmentation Based on Quadric Surface Fitt...

引用

IEEE international conference on computer-aided design and computer graphics

作者： Huijuan Zhang Chong Li Leilei Gao Guoping Wang Graphics and Interaction Lab Peking University Beijing China Peking University Beijing Beijing CN Beijing Engineering Technology Research Center of Virtual Simulation and Visualization Peking University Beijing China Cooperative Medianet Innovation Center Beijing China

In this paper we introduce a hierarchical region decomposition algorithm for triangle meshes segmentation based on quadric surface fitting. Initially, the whole mesh represents a single cluster. At every iteration, the region with largest error is divided and Lloyd iteration clustering is executed following, which make sure the segmentation has the minimum error in each hierarchical level. An error control strategy is used to get finally result automatically. Besides, users also can interpose this process by specifying the segmentation level. Each segmentation region after this process has a best fitting proxy of quadric surface. We propose an improved L 2,1 distance into a hybrid error, which is used in least square fit of quadric function. By comparing with the state-of-the art methods, our method is testified to be insensitive to noise. Model optimization and hole filling based on our algorithm are demonstrated in the last.

关键词： Solid modeling Clustering algorithms Surface treatment design automation Surface fitting Computational modeling Measurement

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Interactive Sound Rendering

Interactive Sound Rendering

引用

11th IEEE international conference on computer-aided design and computer graphics(第11届IEEE国际计算机辅助设计与图形学学术会议 IEEE CAD/graphics 2009)

作者： Dinesh Manocha Ming C. Lin Department of Computer Science University of North Carolina Chapel Hill NC 27599-3175

Extending the frontier of visual computing, sound rendering utilizes auditory display to communicate information to a user and offers an alternative means of visualization. By harnessing the sense of hearing, sound rendering can further enhance a user’s experience in a multimodal virtual world. In addition to immersive environments, auditory displays can provide a natural and intuitive human-computer interface for many desktop applications. In this paper, we give a brief overview of recent work at UNC Chapel Hill on fast algorithms for sound synthesis and sound propagation. these include physically-based sound synthesis for rigid bodies and liquid sound generation, as well as numeriC and geometric algorithms for sound propagation. We highlight their performance on different benchmarks and briefly discuss some problems for future research.

关键词： Acoustic propagation Rendering (computer graphics) Auditory displays Application software Space technology Visualization Auditory system Signal processing algorithms Computational modeling Signal synthesis

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A Federated Integration of Networked Manufacturing Platforms

A Federated Integration of Networked Manufacturing Platforms

引用

international conference on computer Supported Cooperative Work in design

作者： Yun Xu Tianyuan Xiao Ce Liang Linxuan Zhang National CIMS Engineering Research Center Department of Automation Tsinghua University Beijing Beijing China

ISBN: (纸本)142440164X

Networked manufacturing platforms have been widely used for their advantages, and integration of networked manufacturing platforms can provide a large-scale distributed cooperative environment. For commercial consideration, sometimes the integration is expected to be totally decentralized. the architecture for integration of networked manufacturing platforms and the hierarchy of federations are presented. the basic states of the federations are discussed. the factory/instance pattern is used to keep the state information, which is a key element of the federation management and other functions. Both the basic factory/instance pattern and the WS-resource factory/instance pattern are proposed in detail. Finally, the implementation is illustrated with the structure of a federated node

关键词： Web services computer integrated manufacturing Production facilities Authorization computer aided manufacturing Collaborative work Network servers computer networks design engineering Large scale integration

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Exact and approximate representations of trimmed surfaces with NURBS and Bézier surfaces

Exact and approximate representations of trimmed surfaces wi...

引用

IEEE international conference on computer-aided design and computer graphics

作者： Xin Li Falai Chen Department of Mathematics University of Science and Technology Hefei Anhui China

A trimmed surface is usually represented as a parametric surface with a set of trimming curves. However, many CAD processes and algorithms cannot be applied to trimmed surfaces directly because of the complexity in manipulating trimmed surfaces. Moreover, trimmed surfaces will create gaps between different trimmed surfaces. thus it is desirable to represent a trimmed surface by a group of regular surfaces, such as NURBS or Bezier surfaces. the present paper provides an algorithm to split a trimmed NURBS surface into several NURBS or Beacutezier surfaces. the surface patches which domains are far away from the trimming curves coincide with the given trimmed NURBS surface and the patches which domains are close to the trimming curves are represented with high degree Beacutezier surface patches (exact) or bi-cubic B-spline surfaces (approximate). the algorithm is simple, efficient and easy to implement. Compared with previous approaches (and), the new algorithm doesn't change the parameterization of most regions and is easy to maintain the continuity. Since our algorithm can keep most of the patches unchanged, most of the surface patches will be C 2 continuous. Furthermore, the surface patches can be locally merged to be G 1 in the neighbor of trimming curves which is very difficult for those in and.

关键词： Spline Surface topography Surface reconstruction Surface cracks Application software computer aided manufacturing CADCAM Mathematics computer graphics Solid modeling

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10th international conference of Pioneering computer Scientists, Engineers and Educators, ICPCSEE 2024

10th International Conference of Pioneering Computer Scienti...

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10th international conference of Pioneering computer Scientists, Engineers and Educators, ICPCSEE 2024

ISBN: (纸本)9789819787425

the proceedings contain 74 papers. the special focus in this conference is on Pioneering computer Scientists, Engineers and Educators. the topics include: Study on the Coupled and Coordinated Relationships Between Social Security and Economic and Social Development in Macao;A Segmentation Network for Coastal Cegetation Guided by Category-Wighted Information from UAV Perspective Based on SAM;GAN-Based Defogging and Multiscale Fusion Approach for UAV-Based Seagrass Bed Imagery Semantic Segmentation in Challenging Marine Environments;SEBWatcher: Visual Analysis System for Subject, Environment and Behavior in Traffic Scenes;research on the Promotion and Enhancement Paths of Hainan Wenbifeng Pangu Cultural Tourist Areas Based on Network Text Analysis;based on Network Text Analysis: A Study on the Promotion Strategy of a Boundary Island for Lingshui Tourism Experience;deep Reinforcement Learning Based on Greed for the Critical Cross-Section Identification Problem;Intrusion Detection Based on Feature Selection and Transformer BiGRU;discussion on the Construction of Power 3D design Platform for Nested Virtualized Hybrid Cloud;application of Deep Learning Models Based on Chaos Modeling in Power Internet of things Forecasting Tasks;study on Compatibility of Vegetable Insulating Oils and Mineral Insulating Oils for Transformer Based on Molecular Simulation Methods;collaborative Optimization Scheduling Model for Clean Energy in Microgrid Clusters;a Distributed Multi-microgrid Intelligent Scheduling for New Power System;development and Application of Intelligent Power System Analysis Platform;A Deep Reinforcement Learning Control Strategy with Integrated Droop Control for Parallel DC-DC Buck Converters with CPLs;MST: A Comprehensive Approach for Short-Term Power Load Forecasting Based on Data Decomposition, Local and Global Modeling.

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MODES OF WAVE PROPAGATION AND DISPERSION RELATIONS IN INCLUSION REINFORCED COMPOSITE PLATES

引用

10th ASME Biennial conference on Engineering Systems design and Analysis

作者： Liu, Yu Cheng Huang, Jin Huang Feng Chia Univ Electroacoust Grad Program Taichung 40724 Taiwan

ISBN: (纸本)9780791849187

this paper mainly analyzes the wave dispersion relations and associated modal pat tens in the inclusion-reinforced composite plates including the effect of inclusion shapes, inclusion contents, inclusion elastic constants, and plate thickness. the shape of inclusion is modeled as spheroid that enables the composite reinforcement geometrical configurations ranging from sphere to short and continuous fiber Using the Mori-Tanaka mean-field theory, the effective elastic moduli which are able to elucidate the effect of inclusion's shape, stiffness, and volume fraction on the composite's anisotropic elastic behavior can be predicted explicitly then, the dispersion relations and the modal patterns of Lamb waves determined from the effective elastic moduli can be obtained by using the dynamic stiffness matrix method. Numerical simulations have been given for the various inclusion types and the resulting dispersions in various wave types on the composite plate. the types (symmetric or antisymmetric) of Lamb waves in an isotropic plate can be classified according to the wave motions about the midplane of the plate. For an orthotropic composite plate, it can also be classified as either symmetric or antisymmetric waves by analyzing the dispersion curves and inspecting the calculated modal patterns. It is also found that the inclusion contents, aspect ratios and plate thickness affect propagation velocities, higher-order mode cutoff frequencies, and modal patterns.

关键词： Dispersion relations Dispersion (Optics) Fibers Stiffness Elasticity Wave propagation Composite materials Plates (structures) Waves Shapes computer simulation Elastic moduli Elastic constants Disperse systems Anisotropy

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design and testing of a 25-stage electromagnetic coil gun

Design and testing of a 25-stage electromagnetic coil gun

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Proceedings of the 1995 10th IEEE international Pulsed Power conference. Part 1 (of 2)

作者： Cravey, W.R. Devlin, G.L. Loree, E.L. Strohl, S.T. Young, C.M. Tetra Corp Albuquerque United States

Tetra has recently designed and fabricated a 25-stage prototype electromagnetic coil gun. To date, five stages have been successfully tested. Initial results track very well with predicted values. Each coil is sequentially fired as the projectile moves down the bore. A hybrid control system is used to measure the velocity of the projectile as it enters each coil and calculates the time-to-firing. computer predictions based on this model indicate velocities greater than 3000 m/s can be achieved. Currently, the system has been tested with 10 kJ delivered to each coil. Solid dielectric switches are used to transfer the energy from each capacitor to the coils. Performance of the coil gun, computer modeling, and laboratory results are discussed.

关键词： Electromagnetic launchers

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design and implementation of a web-based smart power distribution unit 7

Design and implementation of a web-based smart power distrib...

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2014 7th international conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment and Management, HNICEM 2014 - Joint with 6th international Symposium on Computational Intelligence and Intelligent Informatics, co-located with 10th ERDT conference

作者： Manansala, Rodante O. Quino, Daren Jay A. Pedrasa, Jhoanna Rhodette I. Pedrasa, Michael Angelo A. Electrical and Electronics Engineering Institute University of the Philippines Diliman Quezon City Philippines

ISBN: (纸本)9781479940219

Monitoring energy consumption of servers is a major need in data centers for energy management. Presently, most data centers use smart Power Distribution Unit (PDU) to supply energy to their servers and at the same time to monitor the servers' energy consumption. However, these PDUs are costly since these are not manufactured in the Philippines and have to be procured overseas. Hence, this project developed a low-cost smart PDU built from cheap and locally available parts. the PDU was created using gizDuinoX development board, ENC28J60 Ethernet shield, CS5464 power and temperature measuring IC, and voltage and current sensors. Moreover, the PDU was integrated into a web-based application for monitoring energy consumption. A wired Ethernet was used for the network communication between the PDU hardware and the server computer. the smart PDU developed in this project has an accuracy error of approximately 1.5% in its power and energy measurements, which is within the benchmark set by the Energy Regulatory Commission (ERC). © 2014 IEEE.

关键词： Ethernet

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3D model feature extraction method based on the projection of principle plane

3D model feature extraction method based on the projection o...

引用

IEEE international conference on computer-aided design and computer graphics

作者： Yu Jie Liu Xiao-Dong Zhang Zong Min Li Hua Li China University Of Petroleum Dongying China School Of Computer Science And Communication Engineering China University Of Petroleum Dongying China Chinese Academy of Sciences Beijing Beijing China

With the development of computer techniques, 3D model has been used more and more widely and content-based 3D model retrieval has been a hotspot in the area of multimedia information retrieval. How to extract 3D models' feature effectively is still a difficulty. Projection based 3D model feature extraction is an important kind in feature extraction, because of its robustness against noise, simplification and its simplicity of feature extraction. Based on the theory of principle plane, a feature extraction method based on the projection of principle plane is proposed and applied to 3D model retrieval. the experiments show that the method performs well.

关键词： Feature extraction Biological system modeling Shape Solid modeling Information retrieval Histograms Content based retrieval Noise robustness Distributed computing Harmonic analysis

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Data transmission latency and sense of control

Data transmission latency and sense of control

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10th international conference on Engineering Psychology and Cognitive Ergonomics: Understanding Human Cognition, EPCE 2013, Held as Part of 15th international conference on Human-computer Interaction, HCI 2013

作者： Berberian, Bruno Le Blaye, Patrick Schulte, Christian Kinani, Nawfel Sim, Pern Ren Systems Control and Flight Dynamics Department ONERA Salon de Provence France DSO National Laboratories Singapore Singapore

ISBN: (纸本)9783642393594

Latency has been identified as a major bottleneck for usability of human-system interaction devices. However, the theoretical basis of the effect of latency on action control mechanisms remains weak. In this study, we aimed to investigate the cognitive implications of latency for Human-computer Interaction. We proposed models of agency (i.e., mechanism underlying the feeling of control) as a possible interpretative framework on the nature of the transformation induced by latency. In a series of 3 experiments, we propose to tackle this problem by (1) characterizing the effects (performance and agency) of transmission delays on UAS camera control, and (2) designing and evaluating HMI solutions to mitigate these effects with regard to the agency principle. Our results showed that (1) latency decreases sense of agency and human performance, (2) models of agency could provide HMI solution for latency compensation. Interests of agentive experience accounts for better system design are discussed. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Human computer interaction

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