<span style="font-family: Times New Roman; font-size: small;"> </span><p class="Abstract" style="margin: 0cm 0cm 0pt; layout-grid-mode: char;"><span style="font-weight: normal; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN;"><span style="font-size: x-small;"><span style="font-family: Times New Roman;">For video coding, weighing the balance between and coding rate image quality, we apply global motion search algorithm to avoid loss of image quality and parallel computing capacity of graphics processors to accelerate the encoding process. According to the heterogeneous system of CPU+GPU, and the multi-threaded parallel structure, thread synchronization features of CUDA platform, we build a proper global motion search on CUDA computing model; taking CUDA thread synchronization mechanism to solve the problem of data consistency and improve the efficiency of on-chip data communication; taking CUDA asynchronous mechanism to hide the delay caused by the CPU functions. Demonstrated by the experimental results, parallel computing model based on CUDA could significantly improve the efficiency of motion estimation algorithm and a certain improvement gains from the asynchronous parallel model based on CUDA asynchronous system.</span></span></span></p><p class="Abstract" style="margin: 0cm 0cm 0pt; layout-grid-mode: char;"><span style="font-weight: normal; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN;"></span></p>
Coupled dispersionless (CD) equation is an important integrable model since it describes the current-fed string in a certain external magnetic field. Recently, Ablowitz and Musslimani introduced a class of reverse space, reverse time and reverse space and time nonlocal integrable equations, including nonlocal nonlinear Schrödinger equation, nonlocal sine-Gordon equation and nonlocal Davey-Stewartson equation etc. In this paper we study an integrable reverse space and time nonlocal CD equation. By applying the Darboux transformation, we present the one-soliton and twosoliton solutions for the nonlocal CD equation. We also show the asymptotic analysis of the one-soliton solution from nonzero seed and two-soliton solutions.
In order to investigate the optimization of the performance and structure of a tungsten crucible CVD reactor, the CFD simulation method was used in this paper to simulate the internal flow of the tungsten crucible CVD reactor. The velocity distribution and temperature distribution in the reactor were obtained. The simulation results show that the axial and radial heat convection will occur between the susceptor and the outer wall surface, but the axial heat convection is more intense. Moreover, it was found that the temperature distribution in the CVD reactor was more uniform and reasonable when the upper gas inlet was applied, which was beneficial to the reduction and deposition processes of tungsten. The molar ratio of H 2 to WF 6 has a great influence on the deposition rate of tungsten, and excess H 2 is not conducive to the deposition of tungsten. Thermal radiation has a great influence on the temperature distribution of CVD reactors. It cannot be neglected.
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