sy3

用三元组表为结构，实现稀疏矩阵的加法并输出。(Achieve sparse matrix addition)

C语言矩阵求逆模块,输入矩阵调用此模块即可求出对应的逆矩阵(C language matrix inversion module)

确定近似最优正则化参数，很好的解决不适用问题(To determine the approximate optimal regularization parameter, it is very good to solve the problem.)

简单的平面有限元程序，采用三结点三角形单元；采用等带宽存贮技术；采用高斯消元法解线性方程组。(Simple plane finite element program, using three node triangular element use of such bandwidth, storage technology using Gauss elimination method to solve linear equations.)

有限元NONSAP源程序，里面带有例子，大家可以参考。(Finite element NONSAP source, which with examples, we can refer to.)

求解非线性方程。调用格式x=fmincon（fun，x0,A,b,Aeq,beq,VLB,VUB)(For solving nonlinear equations. Call the format x = fmincon (fun, x0, A, b, Aeq, beq, VLB, VUB))

这是四阶的龙格库塔算法和lyapunov指数稳定性。(tihs is a runge kutta method )

大量的有限元法求解偏微分方程的实例程序，程序里有详细的解释语句(lot of finite element method PDE examples of procedures, procedures are detailed statement of explanation)

说明：  利用GA遗传算法解决欺骗函数最优问题，具体问题描述如下，如有问题请与我联系(The deceptive functions are a family of functions in which there exists low-order building blocks that do not combine to form the higher-order building blocks. Here, a deceptive problem that consists of 25 copies of the order-4 fully deceptive function DF2 is constructed for this paper. DF2 can be described as follows: f(0000)=28 f(0001)=26 f(0010)=24 f(0011)=18 f(0100)=22 f(0101)=6 f(0110)=14 f(0111)=0 f(1000)=20 f(1001)=12 f(1010)=10 f(1011)=2 f(1100)=8 f(1101)=4 f(1110)=6 f(1111)=30 This problem has a maximal function value of 750.)

基于abaqus编辑的用户自定义单元，二维四节点单元(the uel for 2d ELEMENT based on abaqus)