PCA1

code for signal strenght of radio receiver

md5 calcul for generating hashes in 128 bits.Please tell if you like it

强主动声纳信号干扰被动声探测的仿真分析.被动声探测是探测和跟踪水中噪声目标的重要手段,但强主动声纳信号的出现将对被动声探测产生很强的干扰作用,影响被动声纳对噪声目标的检测或跟踪。本文通过计算机仿真,分析被动声纳的积分时间、强主动声纳信号的强度、脉冲宽度和发射周期四个因素对强主动声纳信号干扰被动声探测程度的影响。(Simulation analysis of passive acoustic detection of a strong active sonar signal interference passive acoustic detection is an important means to detect and track water noise goals, but the emergence of strong active sonar signal will be passive acoustic detection generate strong interference effect, the impact of passive acoustic satisfied noise target detection or tracking. This paper through computer simulation, and analysis of the four factors of the integration time of the passive sonar, a strong active sonar signal intensity, pulse width, and launch cycle impact of passive acoustic detection of a strong active sonar signal interference.)

区域生长的分割方法，在matlab下开发，有点小简单，仅供交流~(Regional growth segmentation)

说明：  matlab处理音频信号显示音频信号的频谱图，然后滤波，并对滤波前后音频信号的频谱图进行对比，接着对原始音频信号的频谱去掉若干个点与远视音频信号的频谱比较，最后对音频信号的频谱及相位进行三维显示(audio signal processing matlab)

基于最小二乘法的参数辨识，该模型为二阶模型(Parameter identification based on the method of least squares for second-order model)

matlab中文帮助文档，文档为HTML帮助文档格式。通过中文简要介绍了MATLAB的使用方法。(Chinese matlab help document, document, document formats HTML Help. By Chinese brief introduction to the use of MATLAB.)

MATLAB关于FFT频谱分析的程序，以余弦信号和矩形波为例做了详细说明，并给出了在噪声时的情况。(MATLAB on the FFT spectral analysis procedures, the cosine signal and the rectangular wave, for example to do a detailed description is given in the case when the noise.)

卡尔曼滤波程序，系统为捷联惯导，维数为15的系统方程，参考书目是秦永元惯性导航(Kalman filtering process, the system for the sins, the dimension of the system of 15 equations, a bibliography is ROCKETS inertial navigation)

最基本的matlab GUI设计文件，了解用MATLAB写GUI的基本过程(Matlab GUI the most basic design documents, to understand the basic process of GUI with MATLAB)