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改进CNDO双电子排斥积分近似的新方法及链分子构象能的计算
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作者 沈良骏 叶世勇 王磊 《淮北煤师院学报(自然科学版)》 1994年第3期51-54,共4页
本文以CNDO为例,分析了半经验量子化学方法用于聚合链构象计算中所遇到的困难,指出双电子排斥积分的近似是产生这类困难的原因。提出了在双电子排斥积分中附加与旋转键对称性有关的项,并计算了聚乙烯的构象能图,得到了与实验相吻合的结果。
关键词 CNDO 构象能 聚合链分子 双电子排斥积分
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Accelerating Hartree-Fock Self-consistent Field Calculation on C86/DCU Heterogenous Computing Platform
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作者 Ji Qi Huimin Zhang +1 位作者 Dezun Shan Minghui Yang 《Chinese Journal of Chemical Physics》 2025年第1期81-94,I0056,共15页
In this study,we investigate the ef-ficacy of a hybrid parallel algo-rithm aiming at enhancing the speed of evaluation of two-electron repulsion integrals(ERI)and Fock matrix generation on the Hygon C86/DCU(deep compu... In this study,we investigate the ef-ficacy of a hybrid parallel algo-rithm aiming at enhancing the speed of evaluation of two-electron repulsion integrals(ERI)and Fock matrix generation on the Hygon C86/DCU(deep computing unit)heterogeneous computing platform.Multiple hybrid parallel schemes are assessed using a range of model systems,including those with up to 1200 atoms and 10000 basis func-tions.The findings of our research reveal that,during Hartree-Fock(HF)calculations,a single DCU ex-hibits 33.6 speedups over 32 C86 CPU cores.Compared with the efficiency of Wuhan Electronic Structure Package on Intel X86 and NVIDIA A100 computing platform,the Hygon platform exhibits good cost-effective-ness,showing great potential in quantum chemistry calculation and other high-performance scientific computations. 展开更多
关键词 Quantum chemistry Self-consistent field HARTREE-FOCK Electron repulsion inte-grals Heterogenous parallel computing C86/deep computing unit
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