GMM

in this folder contains the Extract the files and to add the SIFT features.

摘 要：本论文主要研究了语音识别的基本原理,对语音识别系统的构成进行分析处理,其中包括预处理、特征参数提取、建立模块库、识别匹配几大部分。预处理又包括语音采样、预加重、加窗（汉明窗）、端点检测；特征提取的参数是梅尔频率倒谱系数MFCC。 该语音系统采用的是动态时间伸缩算法(DTW)，研究对象是特定人的语音识别，并在MATLAB平台上实现。为了进行后续研究，首先使用电脑中的录音系统录制了阿拉伯数字0—9的语音文件，并转化成 “.wav”格式的文件。(Abstract: This thesis mainly studied the basic principle of speech recognition, to analyze the composition of the speech recognition system, including the preprocessing, feature extraction, to set up the module library, identify several most matches. Pretreatment, including speech sampling, pre-emphasis, add window (hamming window), endpoint detection Feature extraction of MFCC MEL frequency cepstrum coefficient. The voice system USES a dynamic time scale (DTW) algorithm, the research object is the speaker-dependent speech recognition, and realized in MATLAB platform.To carry out the follow-up study, the first to use the recording in a computer system to record the audio files of Arabic Numbers 0-9, and translated into . Wav format file.)

PCA算法程序matlab版,有比较详细的注释，欢迎下载(PCA algorithm program matlab version, there are more detailed comments, please download the)

实现字符识别功能，实验报告，详细，容易理解(To achieve character recognition function, experimental report, detailed, easy to understand)

本代码应用FDTD 方法模拟微带带阻滤波器，并得到S11，S12 曲线以及显示电磁波在空间的传播。频率范围为0-20GHz。微带基片的相对介电常数为6.15，厚度是1.27mm。(Application of FDTD method to simulate the code microstrip band-stop filter, and get S11, S12, and the curve shows the spread of electromagnetic waves in space. Frequency range of 0-20GHz. Microstrip substrate relative dielectric constant of 6.15, the thickness is 1.27mm. )

THIS IS A LEACH PROTOCOL

说明：  无人直升机设计程序，作为典型无人直升机Z22的计算程序，可以作为近似 机型的设计参考(unmand helicopter design programs, typical unmand helicopter performace calculation program ,it is usefull for simular uav design.)

本代码是CLARK和PARK变换的m文件和simulink模型，即从三相坐标变换到两相坐标的变换。(This code is CLARK and the PARK transform of the m file and the Simulink model, namely from the three-phase to two-phase coordinate transformation of coordinate transformation.)

power_regulzero,功率电子领域matlab仿真文件，已经验证过，程序运行正常(power_regulzero,Power electronics field matlab simulation file, has already been verified, the normal operating procedures)

general least square estimation in system ID