1)  BSSE correction
基组叠加误差校正
2)  basis set
基组
1.
A study of Basis set for calculating the Second hyperpolarizabilities γ of molecules;
计算分子二阶超极化率的基组选择
2.
The geometry optimizations of molecular,heat of reactions and change of entropy were calculated by performing ab initio method,density functional theory of quantum chemistry at different levels and typical effect core potential basis sets for combustion flue gas containing Pb system.
应用量子化学从头计算和密度泛函理论的不同方法和有效核势基组,对含铅燃烧烟气中分子的几何结构、反应的焓变及熵变进行了计算。
3.
An extending Lanl2DZ basis set was used in calculations.
基组采用赝势价分裂基Lanl2DZ添加弥散函数和极化函数。
3)  basis sets
基组
1.
The basis sets choice of the ultraviolet photoelectron spectroscopy;
紫外光电子能谱轨道计算的基组选择
2.
Electron momentum distributions for valence orbitals of CH_3Br and CH_3I have been calculated by Hartree-Fock theory and density functional theory using different level basis sets,and compared with the experimental and theoretical results of Minchinton et al.
基于Hartree-Fock和密度泛函理论,用几种不同水平的基组对CH3Br和CH3I分子价轨道电子动量分布进行了计算,并与Minchinton等人的实验和理论进行了比较。
4)  3-21G basis set
3-21G基组
1.
4,6-Di-isopropyl dibenzothiophene and other 8 derivants are studied using Gaussian98 software package,B3LYP method of density function theory,and 3-21G basis set,and frequency analysis was modeled by computer.
利用Gaussian98软件包,采用密度泛函理论(DFT)中的杂化密度泛函B3LYP方法和使用3-21G基组对4,6-二异丙基二苯并噻吩等9种衍生物进行了计算机模拟优化和频率分析,考察了4,6-二异丙基二苯并噻吩及其衍生物的部分原子电子密度,部分键长、键角和二面角以及非键相互作用。
5)  wavelet
小波基组
6)  ECP basis set
ECP基组
1.
The performance of several typical ECP basis sets on calculating the nonlinear optical properties of transition metal systems has been evaluated.
本文比较了一系列典型的ECP基组对计算含过渡金属体系非线性光学性质精度的影响。
参考词条
补充资料:组态叠加
分子式:
CAS号:

性质:又称组态混合或组态叠加,是最早计算电子相关能的方法之一。其核心在于将多电子波函数近似展开为有限个斯莱特行列式波函数(组态函数)的线性组合,然后利用变分法确定组合系数。CI计算适应面广,既适用于闭壳层组态,也适用于开壳层组态;既适用于基态,也适用于激发态;即可计算平衡几何构型,也可用于远离平衡构型的计算。但计算时需考虑原子基组,分子轨道和组态函数的选择,而且迭代收敛困难。

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