非平行板电容器电场和电容的简化计算

用高斯定理求得非平行板电容器的场强和电容，计算方法简便，场的表达式简明，场的图象清楚。     

对静电屏蔽的新认识

通过对导体静电平衡时静电场中各处电场强度的分析,对静电屏蔽的概念做了新的解释     

D与介质无关的充分必要条件

本文讨论电位移矢量Ｄ与介质无关的充分必要条件。     

均匀带电圆环近轴区域的电场

利用叠加原理和级数展开法推导出了均匀带电圆环激发的电势和电场强度，给出近轴区域的近似表达式，并对公式的误差和适用范围作了相应的讨论。     

怎样利用电势、电势差求未知电场

电场强度和电势、电势差是电场中重要物理概念．理解它们物理意义的同时，还必须弄清楚它们的来龙去脉及其联系．电场强度是从力的角度研究电场而引入的，电势和电势差是从能量的角度研究电场而引入的．两者从不同侧面反映了电场这一特殊物质的两种属性，它们存在着必然的联系．电场线可以形象化的描述电场，电场线上每一点的切线方向表示该点的场强方向，电场线在某一区域的密疏分布可以表示场强的大小．因此，电场线与电势也有密切联系．电场线、电场强度与电势、电势差之间联系可归纳如下：1)电场强度跟等势面垂直，电场线从电势高的等势面指向电势低的等势面；     

Orientation of KRb molecules in a switched electrostatic field

We theoretically investigate the orientation of the cold KRb molecules induced in a switched electrostatic field by numerically solving the full time-dependent Schrdinger equation. The results show that the periodic field-free molecular orientation can be realized for the KRb molecules by rapidly switching off the electrostatic field. Meanwhile, by varying the switching times of the electrostatic field, the adiabatic and nonadiabatic interactions of the molecules with the applied field can be realized. Moreover, the influences of the electrostatic field strength and the rotational temperature to the degree of the molecular orientation are studied. The investigations show that increasing the electrostatic field will increase the degree of the molecular orientation, both in the constant-field regime and in the field-free regime, while the increasing of the rotational temperature of the cold molecules will greatly decrease the degree of the molecular orientation.     

ANTI-PLANE ANALYSIS FOR ELLIPTICAL INCLUSION IN MAGNETOELECTROELASTIC MATERIALS

This paper considers the multi-field coupling in magneroelectroelastic composite materials consisting of the inclusion and the matrix are magnetoelectroelastic materials. The mechanical,electric and magnetic fields around an elliptical cylinder inclusion are formulated by complex potentials. Inside the inclusion,the strain,electric and magnetic fields are found to be uniform and vary with the shape of the ellipse. When the inclusion is reduced to a crack,along the interface,the strain,electric field strength and magnetic field strength equal the corresponding remote ones,which can be used as the boundary condition. Special cases,such as a rigid and permeable inclusion,a soft and impermeable inclusion,a line inclusion and a crack problem are discussed in detail.     

电荷对导体球的静电感应问题的讨论

导体球表面的感应电荷分布情况。分三点来进行应用静电场的基本规律及静电平衡条件 ,讨论     

无针式静电纺丝喷头几何形状对电场分布规律的影响机理

根据射流的质量守恒、 电荷守恒和动量守恒分析稳态射流的运动过程, 建立了控制方程组; 应用有限元分析软件COMSOL Multiphysics 5.0建立3种无针式喷头模型, 分析其外部电场的分布规律. 研究发现, 在由典型圆柱体喷头到增加辅助电极的阶梯轴喷头的几何形状变化过程中, 电场强度分布受两侧添加的辅助电极角度和增加回转体数量及回转体直径的影响, 通过设计, 电场被逐步优化. 对无针式静电纺丝装置的生产效率及纤维质量的提高具有重要意义.     

两共焦抛物导体柱板间的电势和电场

利用导体曲面函数,将求解拉普拉斯方程转变为积分运算,从而得到了在无电荷区域普遍成立的电势表达式,再通过边界条件导出共焦抛物导体柱板间的电场分布,并给出了电场线方程.