牛顿迭代法求解非线性方程组

说明：  最小二乘法估算三元二阶方程式系数，用于抛物线曲线拟合(Estimating coefficient of second order equation by least square method)

实现用fluent udf自定义k~e方程(Define the k~e equation by using fluent udf function.)

matlab计算的自适应阈值分隔，非常好用，适用于初学者(matlab adaptive threshold calculation separated, very useful for beginners)

matlab程序—用burg方法计算太阳黑子爆发的周期(the matlab program-the frequency of the sunspot by the method of burg)

实现了bch编码，基于有限域多项式除法,自己动手写的，大家可以看下(Based on division in galois field，relize the BCH code )

贝叶斯matlab程序算法，给出了大量练习数据和实验方法以及结果分析。(Bayesian algorithm matlab procedures are given a great deal of practice data and experimental methods and results analysis.)

可实现OFDM电力载波通信的前导序列检测，能进行连续多个前导检测(Can achieve OFDM power carrier communication leading sequence detection, can carry out a number of continuous preamble detection)

test1.txt 第一列为时间t，0.001s为步长；第二列为系统的输入信号；第三列为系统的输出信号。 signal_analyzer.m首先将test1.txt 的数据读入workspace，然后进行FFT，分析出两信号的频率，输出对于输入的幅值衰减（db），输出对输入的相位差。(test1.txt the first time as t, 0.001s for the step the second as the system input signal the third as the system output signal. signal_analyzer.m first test1.txt data read workspace, and then proceed to FFT, analysis of the two signals in the frequency, the output for input amplitude attenuation (db), the output of the input phase difference.)

啁啾脉冲放大中的多通放大进行数值计算，并计算其横截面光强分布。可以用于进一步计算和确定系统参数(Chirped pulse amplification of multiple amplification through numerical calculation, and calculates the cross-sectional intensity distribution. And can be used in further calculations to determine the system parameters. Ti:saphirre amplification.multipass)

这个帖子中我想讨论的是移动窗口多项式最小二乘拟和平滑方法，粗糙惩罚方法，以及kernel平滑方法。(Posts in this discussion I think are moving window least squares polynomial fitting smoothing method, crude methods of punishment, as well as the kernel smoothing method.)