用平面波展开法计算二维声子晶体带隙，里面附有注释，可以学习-With two-dimensional plane wave expansion method to calculate the phononic band gap, which is annotated, you can learn

步进电机控制程序:该控制软件所要实现的功能是通过控制压电陶瓷自动寻找两极间最佳放电间隙，并维持辅助加工中连续放电的状态-Stepper motor control: The control software is to be achieved by controlling the piezoelectric ceramic best discharge gap between the two polarize and to maintain a continuous discharge in

一维光子晶体带隙分析计算的matlab仿真-Matlab simulation of one-dimensional photonic band gap calculated

采用有限差分法分析光子晶体结构谐振腔，并获得omega-k色散关系，并由此推出带隙分布，及带隙宽度 计算正三角形lattice，采用正三角形9点差分格式，划分网格为正三角形 求解Helmholtz方程本征值问题，周期边界条件，计算区域为菱形原胞，中心为金属柱-photonic band gap，PBG

带缺口梁的屈曲分析。一带缺口的梁,一端受压确定其临界载荷.梁尺寸10×10×300，缺口尺寸10×4×10，受力Fz=5000N. 得位移 载荷如下:得临界载荷Fcr=3606.74N-Buckling analysis notched beam. Notch beam along one end of compression determine the critical load beam size 1010300, 10410 gap size, the force Fz = 5000N