PDF文档，介绍了等离子体覆盖下，单极天线的各项参数，得到等离子频率也发射电压和谐振频率偏移的关系。文章采用的分析方法是时域有限差分法。-PDF document, presented under the coverage of plasma, the parameters of a monopole antenna, the frequency of emission by the plasma voltage and resonant frequency shift of the relat

在像管中，给出了各电极的电位，本程序利用有限差分法，确定空间各点的电位，并找出等电位点。-In the image tube, given the potential of each electrode, the program uses the finite difference method to determine the potential of each point of space, and to identify other potential points.