无源场

利用麦克斯韦方程组和轴对称性，给出了由对称轴上的场计算非静态轴外无源场的一种方法。

A method for calculating non-static off-axis fields without sources of a axial symmetric field is given , using Maxwell ? s equations and axial symmetry .

本文提出一种有限元法的新方案，用于求解轴对称静电场的无源场域中的边界法向场强。

In this paper , a new scheme of finite element method for solving the axisymmetric electrostatic fields is presented to determine the normal intensities on the boundaries of the charge-free regions .

RFID读写系统多采用无源近场耦合天线。

Passive near field coupling antenna is widely used in Radio Frequency Identification ( RFID ) system .

核磁共振永磁体无源匀场的神经网络方法

Method of Artificial Neural Network for Shimming of NMR Magnet

求解定常无源温度场的边界元方法

Boundary Element Method to Solve Non-source Steady Temperature Field

证明了定常无源温度场的边界积分方程的散度等于零，将温度函数表示为温度势函数在边界点的数值计算，避免求解奇异的数值积分。

It is proved that the dispersion of boundary integral equation equal to 0 in non-source steady temperature field . The solving singularity of numerical integral can be avoided if the temperature function is expressed as the numerical calculation of temperature potential function in boundary point .

超导核磁共振成像主磁体无源数值匀场技术的研究

Numerical Method for the Passive Shimming of Superconducting NMR Imaging Magnets

在无源情况各场的表示式中，要附加上一项才给出一般情况下场分布的完整表示式；本文就圆柱波导情形计算出这一附加项。

In order to obtain a complete solution for the field distribution in the general case , one must add an additonal term to each feild expression , and the additional term for cylindrical waveguides has been computed in this article .

真空中无源轴对称静电场与等位线的描绘

Passive Axisymmetric Electrostatic Field in Vacuum and Drawing Method of the Equipotential Line