势能

As for the other cases and system structures, such as elliptical and quartic potential, parametric noise exciatation, some satisfactory analytical results are also obtained by studying the particles system in detail.

对于其他情形和结构下的Brown粒子运动系统，包括椭圆型和四次方型势能形式，以及参激噪声激励下的Brown粒子运动系统，本文都做了详细地研究，并取得了令人满意的结果。

The excited-state intramolecular proton transfer tautomerism reaction of 6-methyl-4-hydroxy pyri-midine monomers and dimmers was investigated by the ab initio method with the self-consistent reaction field with Tomas's polarized continuum mode and CIS theories at HF level on the basis of 6-311+G* and 6-31G basis set. By studying the potential energy surface, it was found that the monomer's ground-state proton transfer process together with the excited-state proton transfer process is a molecular system of four energy level, but dimmers were not, which can be used to explain the fact that UV-visible absorption and fluorescence spectra of monomer and dimers all corresponded to quinoid.

采用 ab initio HF理论的组态相关CIS方法和连续溶剂模型PCM，分别在6-311+G*和6-31G水平上研究了6-甲基-4-羟基嘧啶单体及二聚体激发态质子转移的异构化反应；对其反应势能面的研究发现，单体基态和激发态的异构化反应一起可以形成四能级的分子电子体系，而二聚体的却不能，由此解释了单体和二聚体的紫外吸收光谱和荧光发射光谱均对应于酮式构型的原因。

For two possible geometric structures,square and regular tetrahedron,the electronic structures of ground state and structure parameters of the O_4,O-_4 and O+_4 are calculated according to the principle of minimum energy.

计算了2种可能的空间结构——正方形和正四面体，分别得到了这2种结构的中性分子O4，正一价分子O+4和负一价分子O-4的基态电子结构，并根据能量最低原则确定了各自的结构参数，从而得到了O4分子2种结构的基态总能量、一价电离能及电子亲合势能。

Intimate mode is adopted for the integration of three-dimensional geosciences model and two-dimensional, three-dimensional stability calculation program, while loose mode, completed by data transformation from three-dimensional regular grid to elements acceptable in FLAC 3D, is adopted for underground project.

采用紧密模式，进行了三维地质模型与斜坡稳定性二维极限平衡计算方法和三维最小势能计算方法的集成研究；采用松散模式，进行了地下工程三维规则格网模型与FLAC 3D计算模型之间的集成研究。

The Ritz method We set expressions of components of displacement that satisfy the boundary conditions of displacement , which contain several undetermined coefficients.

§10-3 位移变分法 10一瑞次法先设定满足位移边界条件的位移分量的表达式，其中包含若干个待定的系数，再根据极小势能原理，决定这些系数。

These methods and models are based on solving the Schrodinger equation.

已经提出来的理论方法和建立的理论模型基本上都是基于求解含时薛定谔方程，这就要求理论工作者开展一些数值计算，即基于势能面的量子波包的数值模拟也越来越显得重要。

The SEADOG doesn't involve any electrical components that can be damaged by sea water, and, because the device pumps water to a reservoir, it can store salt water or desalinated fresh water in the form of potential energy to generate power on demand, even if the current wave regime during a particular period is too low to generate power.

SEADOG pump不会陷入任何电力组成部分的困扰——这些部分通常容易被海水损坏。另外，因为，这套装置是把水泵送至蓄水池，所以在需要甚或特殊时期的海浪过低而不能产生电力时，它可以将盐水或者是淡化海水转化作为势能"储备"起来。

The SEADOG doesnt involve any electrical components that can be damaged by sea water, and, because the device pumps water to a reservoir, it can store salt water or desalinated fresh water in the form of potential energy to generate power on demand, even if the current wave regime during a particular period is too low to generate power.

SEADOG pump不会陷入任何电力组成部分的困扰——这些部分通常容易被海水损坏。另外，因为，这套装置是把水泵送至蓄水池，所以在需要甚或特殊时期的海浪过低而不能产生电力时，它可以将盐水或者是淡化海水转化作为势能"储备"起来。

A new model for self-diffusion coefficients was proposed based on both the concepts of molecular free volume and activation energy.

在考虑自由体积和局部临界扩散势能的基础上，提出一种新的计算自扩散系数模型，并给出新模型中各个因子物理含义。

The calculated results are in accordance with the experimental observation that OsO〓 is unreactive to methane under the experimental condition.Ⅱ. The mechanism of the reaction of FeO〓 with ethylene For the oxidation reaction of gas-phase FeO〓 with ethylene, PESs in sextet, quartet and doublet states for various reaction channels are obtained.

二FeO〓与乙烯的反应机理通过对气相FeO〓与乙烯的反应的各种可能的低能量路径进行研究，得到了各种反应通道在二重态、四重态和六重态等三个自旋态下的势能面。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷