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矩量法的fortran程序，利用矩量法求解球散射的程序，希望大家好好学习(mom fortran program)

Abaqus定义材料本构用户子程序-VUMAT(Abaqus defined material constitutive user the subroutine-VUMAT )

利用有限元理论，求一二维梁的固有频率和振型。短边固定，给定长度、横截面积，弹性模量及材料密度已知。并对比理论计算结果进行分析。各参数自己设定。(Using finite element theory, seeking a two-dimensional beam natural frequencies and modes. The short side is fixed, given the length, cross-sectional area, modulus of elasticity and density of the material is known. And compare the theoretical calculation results were analyzed. Each parameter set.)

说明：  摩擦力是抵抗固體表面，流體層和材料元件相對滑動的相對運動的力。有幾種類型的摩擦：幹摩擦是一種與之相反的力(friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the)

说明：  微分进化算法中的其中两个子程序，还有未上传(Differential evolution algorithm)

使用梯度下降法、随机梯度下降法和牛顿法实现的逻辑回归算法。(Using a gradient descent method, stochastic gradient descent algorithm logistic regression method and Newton' s method to achieve.)

计算流体力学经典程序Roe格式，每步有说明，适合初学者(Computational Fluid Dynamics classical procedures Roe scheme, each step is described, suitable for beginners)

说明：  郭照立D2G9(D2G9)

可以求解雷洛方程的膜厚和载荷方程，读者可以稍微修改相关参数就可以应用到自己的公式和相关数学模型中(Reynolds model to develop the film-thickness and hydrodynamic load. )

实现矿井采空区的孔隙率和粘性阻力系数，主要用于采空区瓦斯抽采(The porosity and viscosity resistance coefficient of mine goaf can be achieved.)