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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
The present results are expected to enhance the efficiency of a generalab initio Gaussian program and yet have a sound theoretical footing.
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The Gaussian checkpoint files were converted using the freqcheck utility in the Gaussian program.
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The program is currently interfaced to the TurboMole package and the Gaussian program.
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We are currently in the process of creating a grid service to run the Gaussian program.
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| | In this paper, trans-isomerization of thioformaldehyde is studied by means of intrinsic reaction coordinate (IRC) method. The theoretical results of transition state and the normal coordinates are presented. The geometry optimization of the reactant, the transition state and the tracing of IRC have been performed by using the energy-gradient method with the split-valence 4-31G basis set | | 本文用内禀反应坐标(IRC)方法,采用Gaussian程序,4-31G基函数,研究了甲硫醛反式异构化反应机理。 | | 文摘来源 | | In density functional theory methods in GAUSSIAN program, different integral precision makes the computational configuration of the ground state of the hexafluorodigermane (Ge 2F 6) different. This demonstrates that the integral precision sometimes decides the correctness of the computational results. | | 给出了使用GAUSSIAN程序中密度泛函理论方法进行量子化学计算时遇到的一类问题———六氟锗乙烷分子F3Ge—GeF3的基态构型随计算积分精度不同而改变 ,即GAUSSIAN程序中计算积分精度对计算结果产生重要影响的一个例子 . | | 文摘来源 | | The equilibrium structure and dissociation energy of HF molecule at the ground state are calculated and optimized using quantum chemistry methods CCSD(T)and QCISD(T) at the 6-311 + + G** and cc-pvdz basis set.The analytic potential energy function of HF at the ground state is derived by least square fitting to the Murrell-Sorbie function,and the force constants and the optical constants are calculated.The calculating results are in good agreement with the experiment data. | | 利用Gaussian程序中电子相关耦合族方法CCSD(T)和QCISD(T),分别与基组6-311 + + G**和cc-pvdz组合,优化计算了HF分子基态的平衡结构、离解能.采用标准Murrell—Sorbie函数,进行非线性最小二乘法拟合,得到了HF分子势能函数的解析表达式,并进一步计算出了HF分子的力常数以及光谱常数.计算结果与实验数据非常吻合. | | 文摘来源 | |   |
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