7,032 research outputs found
GPU-based Streaming for Parallel Level of Detail on Massive Model Rendering
Rendering massive 3D models in real-time has long been recognized as a very challenging problem because of the limited computational power and memory space available in a workstation. Most existing rendering techniques, especially level of detail (LOD) processing, have suffered from their sequential execution natures, and does not scale well with the size of the models. We present a GPU-based progressive mesh simplification approach which enables the interactive rendering of large 3D models with hundreds of millions of triangles. Our work contributes to the massive rendering research in two ways. First, we develop a novel data structure to represent the progressive LOD mesh, and design a parallel mesh simplification algorithm towards GPU architecture. Second, we propose a GPU-based streaming approach which adopt a frame-to-frame coherence scheme in order to minimize the high communication cost between CPU and GPU. Our results show that the parallel mesh simplification algorithm and GPU-based streaming approach significantly improve the overall rendering performance
Optimal stopping problems with regime switching: a viscosity solution method
We employ the viscosity solution technique to analyze optimal stopping
problems with regime switching. Specifically, we obtain the viscosity property
of value functions, the uniqueness of viscosity solutions, the regularity of
value functions and the form of optimal stopping intervals. Finally, we provide
an application of the results.Comment: 29 pages, 1 figur
S-D mixing and production in annihilation and B decay and its radiative transitions
The large decay rate observed by Belle for , which is
comparable to , might indicate either an unexpectedly
large S-D mixing angle or the leading role of the
color-octet mechanism in D-wave charmonium production in B decay. By
calculating the production rate of in the continuum
annihilation at GeV with these two possible approaches (i.e.
the large S-D mixing and the color-octet mechanism), we show that the
measurement for this process at Belle and BaBar may provide a clear cut
clarification for the two approaches. In addition, the radiative E1 transition
ratio may dramatically change from 0.04 (for ) to 200 (for ) due to the large S-D
interference effect, thus the E1 transition measurement of at BES
and CLEO-c will also be very useful in clarifying this issue.Comment: final version to appear in Phys.Rev.D, discussion on uncertainties
associated with the color-octet matrix elements is added, 16 pages, 2 figure
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