Traffic congestion management is a global challenge that transportation engineers and planners,policy makers,and the public at large are likely to contend with for *** the obvious energy,health,and environmental impac...
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Traffic congestion management is a global challenge that transportation engineers and planners,policy makers,and the public at large are likely to contend with for *** the obvious energy,health,and environmental impacts,traffic congestion imposes tangible economic costs on *** the highly populated countries in the world,from Asia,Europe to Americas,traffic management is clearly becoming one of the grand challenges of the 21 century. Innovative paradigms are urgently needed to achieve breakthroughs in intelligent transportation systems and urban planning that take advantages of real-time sensing,computational reasoning, and communications to transform existing approaches to vehicle congestion ***-time visualization and traffic simulation that model and simulate vehicle flows in vibrant,dynamic scenes of real-world complexity can provide enabling technologies to such an important problem of significant societal interests.
Voronoi diagram is an elegant spatial structure which has found diverse applications in a variety of disciplines in natural *** this talk,we present study on a class of Voronoi diagrams on a triangulated 2-manifold se...
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Voronoi diagram is an elegant spatial structure which has found diverse applications in a variety of disciplines in natural *** this talk,we present study on a class of Voronoi diagrams on a triangulated 2-manifold setting *** analytic structures of iso-contours, bisectors,and Voronoi diagrams on M,based on exact geodesic metric,are studied in *** particular,compared to euclidean metric spaces,the Voronoi diagrams on M exhibit many special properties that fail all of the existing euclidean Voronoi *** provide practical algorithms for constructing geodesic metric based Voronoi diagrams on M,topology-oriented algorithms are constructed and implemented,which belong to the class of numerically robust geometric *** complexity of the construction algorithms is also ***, three interesting applications—surface sampling and reconstruction,3D skeleton extraction, and point pattern analysis—are presented that show the potential power of the proposed algorithms in pattern analysis.
In response to the increasing demands for modeling and rendering of deformable, nonrigid objects in graphics applications,and having recognized the lack of a fundamental graphics system to support the applications,we ...
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In response to the increasing demands for modeling and rendering of deformable, nonrigid objects in graphics applications,and having recognized the lack of a fundamental graphics system to support the applications,we study a new theoretical framework for nonrigid *** the core of the theory is a physically-based numerical deformation model which characterizes the elasticity and viscoelasticity of objects in geometric transformation.A tetrahedral mass-spring representation is proposed to support the physical model,in contrast to the conventional graphics architecture and systems in which rigid objects and affine transforms are *** proposed theoretic framework will pave the way to direct representations and operations on deformable objects and nonrigid transformation in future graphics systems. Furthermore,we discuss the implementation of the framework in the form of kernels on the new-generation GPU,addressing a hardware acceleration solution to modeling and rendering of the deformation processes,that is,a transform feedback architecture and the numerical process kernels on *** GPU kernels can effectively solve the problem of invisible physically-based deformation processes,via the kernel-to-kernel pipeline designed for real-time rendering.
T-spline overcomes the topological constraints of the control net of NURBS model ***,the introduction of T-junctions,L-junctions and the isolated vertices in the T-mesh makes its topological structure very *** a resul...
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T-spline overcomes the topological constraints of the control net of NURBS model ***,the introduction of T-junctions,L-junctions and the isolated vertices in the T-mesh makes its topological structure very *** a result,not only the T-mesh is hard to be represented,but the computation and local refinement of T-spline are difficult to be implemented as well. This hinders the studies and applications of T-splines in *** this paper,we develop the extended T-mesh,which can be represented in an obj-like format file,and converted into the face-edge-vertex data structure *** such data structure, the computation of T-splines can be made much ***,we develop a new local refinement algorithm,by virtue of the extended *** new algorithm is easy to be implemented,by separating the local refinement into two procedures,the mesh refinement,and blending function refinement.
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