erchengfa3d

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。 在各种优化算法中，共轭梯度法是非常重要的一种。其优点是所需存储量小，具有步收敛性，稳定性高，而且不需要任何外来参数。(Conjugate gradient method (Conjugate Gradient) is between the steepest descent method between the method and Newton' s method, it takes only a first derivative information, but to overcome the steepest descent method convergence slow shortcomings, but also to avoid the Newton method needs to be stored Hesse and disadvantages of computing inverse matrix and the conjugate gradient method is not only one of the most useful methods to solve large linear equations, solution of large-scale nonlinear optimization is one of the most effective algorithm. In various optimization algorithm, conjugate gradient method is a very important one. The advantage is that a small amount of memory required, with step convergence, high stability, and does not require any external parameters.)

6自由度自由漂浮空间机械臂运动学建模，广义雅克比矩阵(6 degrees of freedom of the free-floating space manipulator kinematics modeling, generalized Jacobian matrix)

用刷选法求出100之内的素数。并输出数有多少个。(100 prime number is calculated by the method of selection. And the output count how many.)

计算汉克尔函数，包括复数变量和任意阶数。对初学者很有帮助。(Calculate Hankel functions, including complex variable and arbitrary order. Useful for beginners.)

用matlab编写的关于用传输矩阵法计算一维光子晶体的透射率随周期数变化的程序,感觉非常有用(using Matlab prepared on the use of the transfer matrix method one-dimensional photonic crystal with the transmission cycle Change The procedure, a very useful)

基于Matlab产生光纤陀螺随机噪声和信号，利用固定步长和可调步长的LMS自适应滤波、最小二乘法、滑动均值三种方法进行处理，最后用阿兰方差评价降噪效果。(FOG Based on Matlab generate random noise and signal, using a fixed step size and adjustable step size LMS adaptive filtering, least squares method, the sliding average of three methods for processing, and finally with Alan variance evaluation noise reduction.)

计算多边形(凸凹)面积。 欢迎批评指正(Calculating polygon (convex and concave) area. Welcome criticism)

用幂法反幂法求解方阵的最大最小特征值及其特征向量，C语言程序，基本的数值计算算法(power method and inverse power method)

说明：  用em算法估计高斯混合模型参数，matlab代码(Estimation of Gaussian mixture model parameters by EM algorithm)

说明：  工艺优化中偏最小二乘法对响应面法的改进，显著改善模型系数不显著现象(Matlab program for calculating grey correlation matrix)