AR

直接序列扩频系统（DS，Direct Sequence）又称为直接序列调制系统或伪噪声系统（PN 系统），简称为直扩系统，是目前应用较为广泛的一种扩展频谱系统。要传送的信息经伪随机序列编码后对载波进行调制。在发信端越冬用扩频序列去扩展信号的频谱，在收信端，用相同的扩频友序列进行解扩，将展宽的频谱扩展信号还原成原始信号。因为伪随机序列的速率远大于要传送信息的速率，所以受调信号的频谱宽度将远大于要传送信息的频谱宽度，帮称之为扩频(Direct sequence spread spectrum (DS, Direct Sequence) modulation system, also known as direct sequence or pseudo-noise system (PN system), referred to as direct expansion systems, is currently the more widely used as a spread spectrum system. To send the information encoded by the pseudo-random sequence of carrier modulation. End of winter in the letter to extend the signal with the spreading sequence of spectrum, in the end prepared to receive and use the same sequence spread spectrum despreading friends, broadening the spectrum to restore the original signal expansion signals. Because the rate of pseudo-random sequence is much larger than the rate of information to be sent, so the frequency spectrum by adjusting the width of the spectrum is much larger than the width of the information to be sent to help is called spread spectrum)

基于matlab的滤波反投影重建算法，实现了标准2维图像的重建(based on Matlab filtered back projection reconstruction algorithm, and the standard two-dimensional image reconstruction)

zcross.. to play.. z croos.. zero

顺序浮动向前选择：选取特征中影响系数较大的特征。(The order of floating forward options: select characteristics influence coefficient larger feature.)

本段代码主要是为了实现讲多光谱图像进行光谱分离然后再合并成一种可以在matlab中显示的格式.tif的图像，同时保证了原始的图像信息不丢失(This code is mainly to achieve multispectral images speak for spectral separation and then combined into a format that can be displayed in matlab. Tif image, while maintaining the original image information is not lost)

变压器油中溶解气体的故障诊断方法，即IEC三比值法。用Matlab 程序运用的结果进行整理而得到的约简后的故障诊断决策表(Dissolved gases in transformer oil fault diagnosis method, that is, three-ratio method IEC. Matlab program used to collate the results of the application obtained after reduction of the fault diagnosis decision table)

matlab仿真的一些很实用的例子，学习matlab时可以参考。(some very practical examples of matlab simulation, study Matlab can refer to.)

MATLAB code for Substation Expansion Planning

The MATLAB codes ELM with kernels (for both regression and multi-class classification) work linearly similarly to ELM with random hidden nodes. For the sake of convenience, the source codes of ELM with kernels are given separately.

星形QAM调制程度,用MATLAB仿真...请大家共享(The degree of star QAM modulation, using MATLAB simulation ... please share)