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Fumiya Kono Naohito Nakasato Kensaku Hayashi Alexander Vazhenin Stanislav Sedukhin 《The Journal of supercomputing》2018,74(6):2747-2775
When a tsunami occurred on a sea area, prediction of its arrival time is critical for evacuating people from the coastal area. There are many problems related to tsunami to be solved for reducing negative effects of this serious disaster. Numerical modeling of tsunami wave propagation is a computationally intensive problem which needs to accelerate its calculations by parallel processing. The method of splitting tsunami (MOST) is one of the well-known numerical solvers for tsunami modeling. We have developed a tsunami propagation code based on MOST algorithm and implemented different parallel optimizations for GPU and FPGA. In the latest study, we have the best performance of OpenCL kernel which is implemented tsunami simulation on AMD Radeon 280X GPU. This paper targets on design and evaluation on FPGA using OpenCL. The performance on FPGA design generated automatically by Altera offline compiler follows the results of GPU by several kernel modifications. 相似文献
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Satoshi Nakasato Katsuhiko Higuchi 《Journal of the American Oil Chemists' Society》1970,47(8):283-285
Nine dialkyl trichloromethylphosphonates (TCMPs) were synthesized by the Arbusov reaction from the corresponding trialkyl
phosphite and carbon tetrachloride. Some characteristics of these compounds were studied. The alkyl groups contained from
2 to 18 even carbon atoms. The reaction of triethyl phosphite and carbon tetrachloride was completed in about 4 hr under an
indoor natural light. However, in the preparation of the lower dialkyl TCMPs the mixture of trialkyl phosphite and carbon
tetrachloride was refluxed for 8 hr. With alkyl groups higher than decyl, a reaction time of 8 hr was insufficient. Utilization
of these dialkyl TCMPs was discussed. These compounds were shown to be effective chelating, antistatic and flame resistant
additives in a formulation of polyvinyl chloride. Moreover, they were found to be very excellent extreme pressure additives
for lubricating oil; especially the dibutyl TCMP which was extremely effective at concentrations as low as 0.25%.
Presented at the Japan Oil Chemists’ Society Meeting in Tokyo, October 1968. 相似文献