J2000_2_WGS84_matrix

同时辨识模型阶次及参数算法。用阶次递推算法，结合AIC法——利用赤池信息准则辨识上例的模型阶次和参数。(At the same time identify model order and parameters algorithm. By order recursive algorithm, combined with AIC method- the use of Akaike information criterion to identify the cases of the model order and parameters.)

该代码完成了LM算法，并附有详细的代码说明。(The code completion LM algorithm, along with a detailed code instructions.)

桁架结构非线性有限元分析程序，可以进行结构分析，应用于钢架结构，考虑材料非线性。(Truss material nonlinear finite element analysis program, can be use in civil engineering.)

复数矩阵的运算、包括乘、除、加、减、求逆等(Including all operations of the matrix)

复合材料损伤，复合材料层间分层，损伤，刚度退化、衰减(Composite damage, delamination of composite layers, damage, stiffness degradation, attenuation)

抛物型方程古典&c-n格式差分算法 dasdsadsadasdsdsadas(Parabolic equations of classical & c-n format dasdsadsadasdsdsadas differential algorithm)

用麦克麦考方法求解一维burgers方程的matlab代码(By Mike McCaw method for solving one-dimensional burgers equation matlab code)

糊涂先生给他的五个朋友写信，他写了五封信，但是当他的朋友收到信后，都告诉他：“你的信寄错了”。那么请你计算一下：出现这种情况的概率有多少？（假设糊涂先生是随机地往信封里装信的），你能不能把所有的情况都列出来呢(Mr. foolish to write him five friends, he wrote five letters, but when his friend received a letter, told him: )

fortran四阶龙格库塔法 计算程序自己编程(fortran fourth-order Runge-Kutta method)

说明：  共轭梯度法求解线性方程组,主要采用FR共轭梯度法(solve liner solutions from CG)