针对相对论带电粒子-电子，用于计算对应不同原子序数的原子位移阈值的所需的入射电子的能量。或者由入射电子的能量，计算传递给原子的最大能量。-Relativistic charged particles- electrons, is used to calculate different atomic number atomic displacement threshold.

Wilson法求解动力方程，可以画出节点的位移响应-Wilson method for solving dynamic equations, you can draw the node displacement response

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.)