精密星历内插 matlab代码

有限差分法的径向滑动轴承求解，可用于求解油膜厚度、油膜压力等(Radial sliding bearings for solving finite difference method can be used to solve the oil film thickness, oil pressure, etc.)

主要用于三次样条拟合，对离散点进行拟合插值，(Three order spline fitting)

基于前推回代法的电力系统潮流计算程序。 需要输入支路阻抗和节点功率矩阵。包括支路号、首节点号、尾节点号、支路自阻抗、尾节点给定功率。 输出各节点的电压幅值、相角和各支路电流。(Power flow calculation program based on the forward and backward substitution method. Need input the branch impedance node power matrix. Including branch number, node number, the tail node number, branch self-impedance tail node given power. The output node voltage amplitude, phase angle and current of each branch.)

共轭梯度法（Conjugate Gradient）是介于最速下降法与牛顿法之间的一个方法，它仅需利用一阶导数信息，但克服了最速下降法收敛慢的缺点，又避免了牛顿法需要存储和计算Hesse矩阵并求逆的缺点，共轭梯度法不仅是解决大型线性方程组最有用的方法之一，也是解大型非线性最优化最有效的算法之一(Conjugate gradient method (Conjugate Gradient) is between the steepest descent method and Newton' s method between a method that takes only a first derivative information, but to overcome the slow convergence of the steepest descent method shortcomings, but also avoid the need to store Newton and computing the inverse Hesse matrix and disadvantages, conjugate gradient method is not only to solve large linear equations of the most useful methods, large-scale nonlinear optimization solution is the most efficient algorithms)

五点差分法(matlab)解椭圆型偏微分方程方程,分法,偏分,五点差分,椭圆型,偏微分方程(Five-point difference method (matlab) solutions of elliptic partial differential equations, sub-law, partial points, five-point difference, elliptic partial differential equations)

多机电力系统仿真及其潮流计算，图像的光流法计算的matlab程序,与理论分析结果相比。( Multi-machine power system simulation and flow calculation, Image optical flow calculation matlab program, Compared with the results of theoretical analysis.)

最小二乘法的c语言程序，能求解多元方程组，具有良好的效果(The C language program of the least square method can solve the multiple equations. It has good effect.)

实现任意结构阵列的恒定束宽波束形成法，采用贝塞尔函数分解(Realize the structure of arrays of arbitrary constant beamwidth beamforming method, the use of Bessel function decomposition)

说明：  能够实现线性回归,里面有一个线性回归的实例(It can realize linear regression. There is an example of linear regression)

说明：  三维FMM射线追踪程序，计算得到核矩阵 时间场(Three - dimensional ray tracing program, the calculation of the kernel matrix)