详细描述了中心差分法的原理，并举例说明的中心差分法的应用-The principle of the central difference method is described in detail and examples illustrate the application of the central difference method

一个用中心差分和纽马克算法计算地震反应的matlab程序(a program about calculate the reaponse of earthquake include central differencing and Newmark-B method)