此程序主要使用matlab模拟了垂直激光器谐振腔的核心部件DBR的工作过程，得到其阈值振荡曲线-This program is mainly use matlab to simulate the working process of the core components of the vertical laser cavity DBR, its threshold oscillation curve

There is a well attenuation curve as input to calculate its seismic waves, Includes the modulation, demodulation, signal to noise ratio calculation, MIMO OFDM matlab simulation.

matlab编写的平面四杆铰链机构运动分析程序，可以分析平面四杆铰链机构的速度加速的角位移曲线，自带GUI(The planar four bar hinge mechanism motion analysis program written by Matlab can analyze the angular acceleration curve of planar four bar hinge mechanism and bring GUI.)