势能

The force is dominated by entropy force when the chain isdeformed less than 0.9 of the full-extended chain, while by enthalpy force. Theenthalpy force is contributed by the intro-molecular interaction. Bond stretchcontributes to the force more than bond angle bend. Torsion and VDW contributelittle to the force.3. The internal energy contribution to the elastic force It is in dispute that whether 〓 is dependent on the strain, and it is hard toresolve the problem using present elastic theories because they are athermal.

我们模拟了聚乙烯模型聚合物的SMFS，研究了链长、势能有效距离和温度对力谱的影响，探讨了力谱的本质问题，得到以下结果：改进的分子动力学方法可以很好的模拟聚合物的SMFS；SMFS是链段的性质而不是整个高分子链的性质，对于聚乙烯，该链段碳原子数目大于40；SMFS的本质是熵弹性，形变小于全伸直链的0.9时，力为熵弹力；形变超过全伸直链的0.9时，能弹力占主导地位，这种能弹力完全是分子内相互作用引起的，是由键伸缩和键角弯曲贡献的。3。

We want to ask whether there exist massive gravitons in Nature,In this paper,we will propose a gauge model with massive gravitons.

在文中，作者利用它们的自相互作用势能的解析表达式来得到相应的散射振幅。

The mass term of gravitational gauge field is introduced into the theory without violating the strict local gravitational gauge symmetry,massive gravitons can be considered to be possible origin of dark energy and dark matter in the Universe.

由其相应的势能表达式可见，引力子的自作用在大尺度下可以有斥力项存在，这一特殊的性质不仅使得它可以作为宇宙暗物质和暗能量的候选者，同时亦可能对于解释宇宙的构成及演化起到一定的积极作用。

With the urbanization potential and other theories, I plan the spacial construction of Shi Jiazhuang urban system spatial as ""a hore ,a circle , five stalks"".

本文根据石家庄市域城镇化势能计算结果，运用有关城镇空间理论对石家庄市域城镇体系的空间结构进行规划，认为石家庄市域城镇体系的空间结构应为一核、一圈、五轴为骨架，增长极穿插其中的空间结构模式。

The variation of interchain potential in poly polymer during chain rotation was calculated.

徐敬计算了聚偏氟乙烯分子链旋转时势能的变化。

From the potential energy profile, it can be predicted that, the dominant channel of this reaction consists of three steps: the two reactants first form a three-membered ring intermediate (INT1) through a barrier-free exothermic reaction of 19.2 kJ/mol; three-membered ring intermediate (INT1) isomerizes to a four-membered ring silylene(P2) via the transition state (TS2) with an energy barrier of 22.8 kJ/mol; four-membered ring silylene(P2) further reacts with ethene(R2) to form a silicic bis-heterocyclic compound (P3), which is also a barrier-free exothermic reaction of 132.2 kJ/mol.

用CCSD//MP2/6-31G*方法研究了单重态二甲基亚烷基硅烯与乙烯生成硅杂双环化合物环加成反应的机理，根据该反应的势能面可以预言，该反应的主反应通道有三步组成：第一步是两反应物（R1， R2）首先生成了一三元环中间体（INT1），它是一无势垒的放热反应，放出的能量为19.2 kJ/mol；第二步是三元环中间体(INT1)经过渡态TS2异构化为了四元环硅烯（P2），其势垒为22.8 kJ/mol；第三步是四元环硅烯（P2）进一步与乙烯(R2)反应生成了硅杂双环化合物（P3），该反应也是一无势垒的放热反应，放出的能量为132.2 kJ/mol。

Takes off starts the instantaneous landing angle not to be unstable, creates this kind of phenomenon the reason is because athletes leg department strength is bad, easy to cause to take off the leg cushion scope oversized, the cause horizontal kinetic energy cannot the very good transformation for take off the leg extensor elastic potential energy.

同时在起跳开始瞬间着地角不稳定，这是由于运动员的腿部力量较差所引起的，容易导致起跳腿缓冲幅度过大，致使水平动能不能很好的转化为起跳腿的伸肌的弹性势能。

The periodical changes of D,α and r_0 with the adsorption position were expressed with the first five terms in Fourier expansion. The potential surface of H_2 on (111) crystal surface was computed individually with LEPS method.

再根据表面周期性的特点，用Fourier展开的前五项表示D，α和r_0随表面位置的变化，最后用LEPS势函数作出H_2在晶体(111)面上的吸附势能面。

The molar conductivity of sodium chloride and potassium chloride aqueous solution was also obtained and compared with the experiment values. In our simulation, the solvent-averaged interaction potential between the ions was modeled by pairwise repulsive soft-core interactions and Coulomb forces that were handled by Ewald summation technique.

模拟过程基于电解质溶液的原始模型，溶剂被看作连续介质，溶质分子之间的相互作用采用软核加静电的势能函数模型，长程静电力的处理采用Ewald加和方法。

This paper analyses Transient Energy Function from the viewpoint of dynamics and reaches some conclusions as follows:The TEF refering to stable equilibrium point of pre-fault is more reasonable than that refering to stable equilibrium point of post-fault.

引言 电力系统直接法暂态稳定分析的研究已经基本趋同于暂态能量函数法。势能界面法、相关不稳定平衡点法和扩展等面积法等诸种主导流派都以暂态能量函数为基础，差异是采取不同的方式求取临界能量。

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