Trigonometric-function

基于无刷直流电机的的矢量控制程序，可以在simulink中直接建模，系统为开环系统。(Brushless DC motor based on vector control program, you can direct modeling in simulink, the system is open-loop system.)

脑波FFT变换 调用格式见m文件头部说明（下边也复制了一份） 有配套.DLL.h.lib.ctf文件，可以在C或C++环境中调用 ------------------------------------ 保存为FFT.m文件 输入参数： N：进行FFT变换的点数（要求是2的N次幂）； fs：信号的采样频率（frequency of simpling） sig：进行FFT变换的数组（一维）。 输出参数： f_sig:变换后的信号（一维数组） E_delta、E_theta 、E_alpha、E_beta分别表示δθαβ相应频段的能量加和。 other为其余频段的能量加和（供参考用） -------------------------------------------------------------------------- function[ f_sig ,E_delta , E_theta , E_alpha , E_beta , other ] = FFT( N , fs , sig )(EEG FFT transform is called m file format, see head illustrate the matching DLL files, you can be C or C++ to call------------------------ simpling) sig: to FFT transform array (one dimension). Output Parameters: f_sig: transformation of the signal (one-dimensional array) E_delta, E_theta, E_alpha, E_beta δθαβ, respectively, the energy increases and the corresponding frequency band. Other for the rest of the energy band increases, and (for reference) -------------------------------------------------------------------------- function [f_sig, E_delta, E_theta, E_alpha, E_beta , other] = FFT (N, fs, sig))

说明：  高维数据分类程序！数据挖掘及图像分析利器！matlab版！(High dimensional data classification procedures! Data mining and image analysis tool! matlab version!)

该文件代码可以在MATLAB环境下适用于语音智能识别，使用倒谱系数法(The code of the file in the MATLAB environment suitable for voice intelligent recognition using cepstral coefficients method)

emd算法 主要用来提取信号的本征模态，将信号的原始信号从混合噪声中提取出来(emd algorithm Mainly used to extract the signal intrinsic mode, the original signal from the mixed noise extraction)

说明：  LMS (Least Mean Squares): most basic canonical ANC algo FxLMS (Filtered eXtended Least Mean Squares): adds an additional learned filter for the secondary path signal - signal from cancellation speakers to users ears - to account for phase problems and audio coloration added during practical noise cancellation applications NLMS (Normalized Least Mean Squares): adds simple adaptively updated learning rate on top of LMS to speed convergence. FxNLMS (Normalized Filtered eXtended Least Mean Squares): combines FxLMS and NLMS FuNLMS (Filtered-u Last Mean Squares): adds an additional active LMS filter to FxNLMS to cancel out noise bleeding from the cancellation speaker to the error mic. Fairly robust but convergence not gaurunteed!

chan算法，利用TDOA参数实现定位功能，是一种很经典的算法(chan algorithm parameters using TDOA positioning function, is a classic algorithm)

车辆信号被动式红外信号的滤波以及能量分析(Vehicle passive infrared signal filtering and signal energy analysis)

电流环仿真，用MATLAB，采用Simulink(Current loop simulation, using MATLAB, using Simulink)

结构分析的有限元法与MATLAB程序设计配套(Structural analysis of the finite element method and MATLAB programming package)