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判断城市电话区号是否合法的算法,对于理解算法有参考意义(Urban telephone area code to determine the legality of the algorithm, algorithm reference value for understanding the)

【ansys基本建模算例】带法兰油缸的有限元分析，计算相关应力即变形([Examples] basic modeling ansys finite element analysis with flanged cylinder, calculating the stress that is associated deformation)

Fortran 95程序设计【彭国伦】第7章原代码，非常有学习价值！(Fortran 95 programming [Lun Peng-- Chapter 7 of the original code, the very value of learning!)

说明：  用于三维条件下的推板造波法udf,冲程与周期可修改，附带消波udf和cas文件(generating waves with pushboard under 3D condition)

偏微分方程的数值解法，简单的离散 变分以及求解过程(Numerical solution of partial differential equations, the simple and the solution process of discrete variational)

4阶龙格--库塔法解常微分方程,比较好用,希望大家尝试.(4-order Runge-Kutta method solution of ordinary differential equations, more useful, I hope everyone try.)

在Z2[X]中判断一个多项式是否本原多项式，并能对给定的多项式求逆。 (in Z2 [X] to judge whether a polynomial primitive polynomial, and the right to the inverse polynomials.)

通过采集直流输电线路正负极故障电流信息，实行正负极解耦，用行波进行故障定位( U901A u8FC1 u91C0 u96C6 u76R4 u6D1 u8F93 u7535 u7EBF u8DEF u6B63 u8D1F u6781 u6545 u969C u7535 u6D41 u4D1 u606F uFF0C u5B9E u882C u6B63 u8D1F u6781 U89E3 u806 uFF0C u7528 u884C u6)

用SVD奇异值分解法和阻尼最小二乘算法解决地球物理反问题，程序比较简单易懂(Using SVD, singular value decomposition method and damped least-squares algorithm to solve geophysical inverse problem, the procedure is relatively simple to understand)

对加速度数据进行二次积分，最终得到位移数据。(Double integration of acceleration data and the final displacement data.)