xiankuan

C语言实现多项式的最小二乘拟合，可用于在区间上对函数进行拟合(C language polynomial least squares fitting, can be used to fit the function on the interval)

程序采用C语言，实现最小二乘辨识算法和递推最小二乘算法(Program using C language, least squares identification algorithm and recursive least squares algorithm)

线宽计算，用matlab计算线宽。可以得到的值来分析和使用半导体激光器线宽的联系(linewidth calculator)

完成了复数矩阵的计算,采用了并行算法原理，较快速的处理了稀疏矩阵方程结构。(Completed a complex matrix computation, parallel algorithm principle, more rapid processing of the sparse matrix equation structure.)

一个非线性方程的matlap程序，杜芬方程的变异(A nonlinear equations matlap program, variation of Duffing equation)

说明：  这是LU分解法求线性方程组的资料，讲解了LU分解的原理及过程，非常实用(LU decomposition seeking linear equations to explain the principles and process of the LU decomposition, very practical)

四阶龙格库塔法函数更新四元数程序代码,采用VC编写(Fourth-order Runge-Kutta method function is updated quaternion code)

比Windows自带的高级一点的计算器，能将整个表达式输入，然后求值。 这个程序要求读者具备编译原理的一些知识。 (Advanced calculator than Windows built, the whole expression input can be then evaluated. This program requires the reader to have some knowledge of compiler theory.)

说明：  在学习数字信号处理算法程序中用VC编写的几个通用算法程序。 卷积计算/DFT与FFT实现/(In the learning process of digital signal processing algorithms using VC General Algorithm for the preparation of several procedures. Convolution calculation/DFT and FFT realization /)

离散数据生成tin的优秀代码，注释多，易于学习和移植(Discrete data generated tin excellent code, comments, easy to learn and transplantation)