电偶极子

Based on the deduced vector potentials, the expressions of the electric fields are derived. Also the numerical evaluation method of Sommerfeld Integrals appeared in the expressions is discussed.

接着推导出半空间界面附近电偶极子的电场强度的表达式，并讨论表达式中索末菲积分的数值求解方法。

The step response and impulse response of homogeneous earth half space, marine double half space and four-layer earth models to horizontal electric dipole source were computed in this paper. A concept of transient impulse time was put forward.

本文计算了水平电偶极子源均匀大地半空间，海洋均匀双半空间和海洋四层模型的阶跃响应和冲激响应，提出了瞬变冲激时刻的概念。

The harmonic field of electric dipole source on the uniform earth surface is converted into transient field by inverse Laplace transform,and the Bz/ t transient curve is calculated.The Hz transient curves on the stratified earth surface are obtained from cosine transform calculated by broken line approximation.

由逆拉普拉斯变换将均匀大地面上的电偶极子源谐变电磁场转换为瞬变电磁场，并计算出Bzt瞬态曲线；对分层大地面上的瞬变电磁场，采用折线逼近法计算余弦变换得出Hz瞬态曲线。

We have done some exploratory work from several aspects to generalize the Brownian motor to the more real situation: The model which molecular motor has internal degree of freedom; The track on which the Brownian particle moves cannot be completely ordered and contain certain amount of disorder, the model is rocking ratchets with stochastic potentials; A two-dimensional ratchet model with a non-conservative force to realize the coupling between the mechanical and chemical processes.

目前大多数的研究工作是把分子马达抽象为一维的点粒子，我们在推广布朗马达到更真实的方向上开展了以下几个侧面的研究分子马达动力学行为的探索性工作：分子马达具有内部结构的电偶极子模型；考虑分子马达的轨道不规则、不光滑的摇摆棘轮模型；提出一个具有非保守脉冲力场的二维棘轮模型。

The results show the dispersive curve of one-dimensional photonic crystals have the normal dispersion in the transmitted bands and abnormal dispersion in the band gaps which is similar with that of elastic electronic dipolar.

结果表明一维光子晶体的色散曲线与弹性电偶极子的经典色散曲线类似，在光子晶体的导带为正常色散，而在禁带呈现反常色散。

The energy levels of free metallic ion were calculated with a 13 parameters model including the 2-body and 3-body interactions. The Stark energy levels of crystal field were calculated using the model proposed by Newman based on 1 electron orbital approximation The f-f oscillator strength calculation includes the contribution of electrostatic-induced, ligand polarization, vibronic-induced, magnetic dipolar transitions.

其中，自由f离子能级计算采用包括双电子与叁电子组态相互作用的二三参数模型，晶体场Stark分裂计算采用单电子轨道近似，用Newman角叠加模型计算晶体场参数。f-f跃迁振子强度计算包括静电诱导偶极跃、配体极化偶极跃、振动诱导电偶极跃迁及磁偶极跃迁的贡献。

In quasi-static conditions, the closed expressions far from source in the air and the earth is derived for electric dipole source, and by using it as the outer boundary conditions of the finite element method, difficulties in loading the boundary conditions is solved.

在准静态近似条件下，分别推导了水平电偶极子在空中和大地的远区电场闭合表达式，并以此作为有限元计算中的外边界条件，解决了边界条件加载的困难。

The relative permittivity of the Langmuir monolayer on a substrate surface is calculated by the orientation order S with consideration of the length of the permanent dipoles within domain and the distance between the dipole and the substrate.

计算结果表明：对于成份一定的稳定构型单分子层膜，其相对电容率大小除了依赖于分子密度和基底物质的相对电容率外，对分子负电荷中心离基底的距离，以及考虑电偶极子长度的分子区域大小也有不同程度的依赖

Find the torque on an electric dipole in a uniform electric field.

求一个电偶极子在电场中受到的力矩。

Based on multi-conductor transmission lines and dipole method, a numerical method to predict the transient electromagnetic environments due to the operation of switches in air-insulated substation is proposed. After a model of busbars in a 500kV substation is set up, the transient electromagnetic field is predicted.

4提出了将多导体传输线时域有限差分法和电偶极子法相结合的空气绝缘变电站瞬态电磁环境数值预测方法，并对一座500kV变电站开关操作产生的瞬态电磁环境进行了预测计算，获得了可用于指导二次设备下放后其电磁屏蔽设计的关键数据。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。