DQM法matlab代码，用于求解输液管道的失稳问题，在边界弹簧刚度变化的情况下，给出了临界失稳流速。-DQM method matlab code for solving the instability problem pipes conveying fluid, the spring stiffness in the border cases, given the critical buckling velocity.

计算振动的微分求积法，运用MATLAB程序，可解决一阶或者高阶的振动(Differential quadrature method for calculating vibration)

GDQ matlab code for the beam