newmark函数，matlab实现接二阶微分方程-newmark function, matlab access for second order differential equations

二阶非齐次线性微分方程的解法研究,工程物理领域适用-Order Nonhomogeneous Linear Differential Equation research, engineering physics apply

单自由度系统对初始条件和简谐激励相应 由单自由度的运动方程和初始条件得到二阶非齐次常微分方程，它的解有对应的齐次方程的通解和非齐次方程的特接构成。-Single degree of freedom system to initial conditions and the corresponding harmonic excitation Special general solution of the equations of motion and initial conditions b

线性二阶微分方程的滑模控制设计，S函数编写，采用等速趋近律，包括控制对象S函数-Sliding Mode Control of linear second-order differential equations, S function written using constant reaching law, including the control object S function

使用imsl数据库计算二阶微分方程，方法简洁快速(Using the IMSL database to calculate the two order differential equations, the method is simple and fast)