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说明：  ABAQUS 的二次开发,详细注释说明，自学ABAQUS的二次开发(ABAQUS secondary development, detailed notes, self-study ABAQUS secondary development)

编写了一个用于二维水深插值的双线性插值的fortran程序，用于水深的插值计算，内有验证的算例(Write a fortran program for two-dimensional depth interpolation bilinear interpolation, interpolation calculation for water depth, within a verification example)

用刷选法求出100之内的素数。并输出数有多少个。(100 prime number is calculated by the method of selection. And the output count how many.)

这里包含了有限元法的一本书籍，和有限元法的C++代码。希望对各位有所帮助(This contains a finite element method books, and the finite element method of C++ code. I hope to help you)

matlab中实现箭头的程序，直接作为函数使用。(matlab realize the arrow in the procedure)

说明：  四级四阶龙格库塔格式，求解微分方程的好算法。(Four fourth-order Runge-Kutta format, a good algorithm for solving differential equations.)

包括广义互相关函数GCC时延估计，通过matlab代码，计算加权加速度。( Including the generalized cross-correlation function GCC time delay estimation, By matlab code, Weighted acceleration.)

利用M序列作输入估计脉冲响应值，完成对连续和离散系统传递函数参数的辨识(Use of M sequence as the input impulse response estimated value to complete the continuous and discrete transfer function parameter identification)

begining of UMAT in abaqus

瑞雷波勘探的书籍，比较清晰的PDF文档，里面含有瑞雷波正演代码，一最小二乘反演代码，对学习瑞雷波非常有帮助。(Rayleigh wave exploration books, clear PDF document, which contains the Rayleigh wave forward code, a least squares inversion code, very helpful for learning Rayleigh wave.)