util_mod

该程序用于形成节点阻抗矩阵，按程序要求格式输入线路数据linedata，Zbuild（linedata）形成节点阻抗矩阵(The procedures used for the formation of the node impedance matrix format input line data linedata procedural requirements of Zbuild (linedata) node impedance matrix)

室内无线定位技术，基于两次最小二乘法的matlab仿真程序(Indoor wireless positioning technology, based on the two least-squares method matlab simulation program)

burgers方程求解，采用fortran编写，有详细的说明，效果非常好(burgers equations, using fortran prepared a detailed description of the effect is very good)

利用SAR卫星在多个时刻的位置和速度信息，计算出任意象元成像时刻卫星的位置，拟合出SAR卫星的轨道模型。(Using SAR satellite in multiple time position and velocity information to calculate as the image element imaging time satellite position, fitting the SAR satellite orbital model.)

基于FLUENT软件的一些常用UDF实例，比较有帮助(udf example)

欧拉角和四元数的转换：输入偶欧拉角，按Rechnen，程序会自动将欧拉角转换为四元数，再得出最终的方位。(Euler angles and quaternion conversion: input dual Euler angles, press Rechnen, the program will automatically Euler angles conversion quaternion, and then come to the final orientation.)

正则化方法包括Tikhonov，tsvd,ttls,tgsvd,csvd(Regularization Method include Tikhonov，tsvd,ttls,tgsvd,csvd.)

可以对高温状态下的混凝土材料进行准确的塑型模型构建(It can be used to construct accurate plastic model of concrete under high temperature)

说明：  Abaqus复合材料Hashin失效子程序(Failure subroutine of Hashin for ABAQUS composite)

说明：  Matlab下基于蒙特卡洛方法解辐射传输方程(solution of radiation transmission equation based on Monte Carlo method under Matlab)