hyperspectral_image_index_analysis

matlab短时傅利叶变换的程序！ 自己改编的，要是有错误请大家指正 (Short-time Fourier transform matlab procedure! Their own adaptation of it, and if there are mistakes please correct me)

matlab编的水平集分割的一些好东东, 适用于模糊图像的目标提取，希望能共勉(some program of matlab for image segmentation and small target extraction)

简短的讲述Matlab软件基本使用方法和特性的ppt(Brief about the Matlab software, the basic use of the methods and properties ppt)

基于光伏模块直流物理模型，在matlab 仿真环境下，开发了光伏阵列通用仿真模型。利用该 模型，可以模拟任意太阳辐射强度、环境温度、光伏模块参数、光伏阵列串并联方式组合下的光伏阵 列I-V 特性。此外，该模型还融合了光伏阵列的最大功率跟踪（MPPT）功能，可以用于光伏发电系统 和风光复合发电系统的动态仿真。(A Versatile simulation model for photovoltaic array is developed based on the DC physical model of photovoltaic module under Matlab environment. By the model，the I-V characteristics of photovoltaic array with different combinations can be simulated at any corresponding insolation level, ambient temperature and parameters of the photovoltaic module. In addition to that, the model includes the function of Maximum Power Point Tracking(MPPT) . It can be used in the dynamic simulation of photovoltaic systems and wind-solar hybrid systems.)

阵列天线方向图随天线数目变化而变化的图像。(Array antenna pattern varies with changes in the number of antennas images.)

简单的人脸识别代码，如果是其他图片的话，放在当前文件下，修改一下文件名即可。(Face Recognition simple code, if it is the other picture, then on the current file, the file name can be changed a bit.)

这是基于MATLAB的语音降噪研究资料。里面包括带噪语音以及处理后的结果，还包括源代码(This is a MATLAB-based voice noise reduction research data. Which includes the results of Noisy Speech and processing, and also include the source code)

说明：  有限单元法及其应用 彭细荣，matlab在有限单元中的应用及其代码，掌握该方法的弹性求解过程。 (matlab application finite element method )

有一个信号，如果抽样频率，设计一个M点滑动平均系统，要求虑除信号中500Hz的成分，用MATLAB编程仿真结果，确定M的值并画出滑动平均系统的幅频特性图。(Have a signal, if the sampling frequency, to design a M point moving average systems, requirements, in addition to the composition of 500 hz in signal with MATLAB simulation results, determine the value of M and draw the amplitude-frequency characteristics of moving average systems. )

接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档。这里对程序的流程进行说明。 首先根据短训练字的特性进行相关运算，进行信号到达检测，当检测到相关值大于门限一定次数后，认为有信号到达。然后根据长训练字的特性，进行相关运算，进行OFDM符号FFT窗口起始位置的估计。估计出FFT窗口的位置后，先在时域进行小频偏的估计，将两个长训练字进行小频偏补偿后，进行FFT运算，根据FFT运算的结果进行整数倍频偏的估计。这些参数估计完成后，就可以进行数据解调了。先对数据部分进行完整的频偏补偿，然后根据估计的FFT窗口位置进行FFT运算得到频域的数据，进行解调。然后在对应于导频的子载波位置上提取出导频信息，根据导频信息估计出剩余定时误差以及剩余的信道响应误差，将误差量送入环路进行跟踪。当收到所有数据后，重新回到信号到达检测状态，进行下一次信号到达的检测和信号接收。 (The receiving end uses the algorithm and the program flow and the frame structure of the OFDM symbol transmitted by the sending end. Specific frame structure, and timing estimation, frequency offset estimation, residual error tracking algorithm can refer to the documentation. Here to illustrate the process of the program. First, according to the characteristics of the short training word correlation operation, the signal reaches the detection, when the correlation value is greater than the threshold of a certain number of times, that there is a signal to reach. Then, according to the characteristics of the long training word, the correlation operation is carried out, and the initial position of the OFDM symbol FFT is estimated. The estimated position of the FFT window, first in the time domain for small frequency offset estimation, two long training word for small frequency offset compensation, the FFT operation. According to the result of FFT for integer frequency bias estimation. Af)