用于计算高频下的金属介电常数，主用侧重应用于有限元分析仿真中金属材料的物理属性。-The metal used to calculate the high frequency dielectric constant, the main emphasis used with finite element analysis simulation of the physical properties of metal materials.

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提出一种基于快速傅里叶变换( F F T)提取相位的方法, 分析自混合干涉信号, 不增加系统复杂度就能将激光自混合( SM LD) 微位移测量精度提高到纳米量级。(A phase extraction method based on F F T is proposed. The self mixing interference signal is analyzed, and the accuracy of the self mixing (SM LD) micro displacement me