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a function called fit least square in mathematics with an excel sheet

《精通Matlab6.5版》张志勇等编著，这本书的电子版("proficient Matalab 6.5 version of the" Written by Zhang Zhiyong, this electronic version of the book)

一个FFT改进版程序，使用kaiser窗；可以方便地打出信号的频谱包络，以及算出SNR/SINAD/THD/SFDR等各种数值。工程上使用非常便利(FFT with Kaiser Wndw, easily plot out the Frequent spetrum and the SNR/SINAD/THD/SFDR performance values)

实时监控电机的运转速率，保证电机的正常运转(Real-time monitoring of the motor running speed, to ensure the normal operation of the motor)

bfgs法，求解函数，简单，通俗，易懂，便于优化更改(bfgs)

说明：  永磁同步电机智能PID控制的原理、数学模型、矢量控制、建模仿真与结果分析。(The principle, mathematical model, vector control, modeling simulation and result analysis of intelligent PID control for PMSM.)

Haar wavlet transform 4 gray level pictures

This code is about short time fourier transform.

Kringing建模重要程序,应用于汽车覆盖件等复杂构建建模(useful for Kringing model)

计算移动平均值，输入变量为任意长度数据和移动平均窗口期间，输出为移动平均值(Moving average calculation, the input variables for any length of data and moving average window period, the output for the moving average)