user-subroutines-l4-usdfld

说明：  数学建模工具箱 有丰富的数学建模模型，全部用matlab语言编写(Mathematical Modeling Toolbox)

使用matlab编写的时域有限差分法，pec边界的光子晶体。(Written using matlab finite difference time domain method, pec boundary of the photonic crystal.)

ABAQUSYONG UMAT 描述热力耦合子程序(ABAQUSYONG UMAT subroutine describe thermal coupling)

根据给定的等距结点上的函数值与一阶导数值, 用埃尔米特等距插值公式计算指定插值点处的函数值。(According to the given equidistant nodes function value with a first derivative values, with equidistant interpolation Hermite interpolation formula specified function value at the point.)

使用格子boltzmann方法模拟气液两相流运动(Lattice Boltzmann method(LBT) to simulate two phase flow)

带LASSO修正的LARS算法 稀疏表示(LARS with LASSO modification Sparse Representation)

扩展有限元的Fortran代码，用于扩展有限元的数值仿真计算(Extended finite element of the Fortran code for the extended finite element numerical simulation.)

此程序为潮流计算的最后一部分功率计算程序。(This program is the last part of the power flow calculation calculation program.)

说明：  c++语言求解稀疏矩阵方程组的ICCG法源程序。参考：《工程电磁场数值计算分析与综合》 附录（Fortran90）.(c++ solves sparse matrix equations with the ICCG method.Reference: &quot Analysis and Synthesis of Numerical Electromagnetic Field ,&quot Appendix (Fortran90).)

此程序为基于时域有限差分法的matlab程序，主要是计算二维MUR吸收方柱散射(This procedure is based on finite difference time domain method matlab program, mainly of two-dimensional scattering MUR absorbing square columns)