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说明：  此代码描述的是跳频系统在不采用两路分集的情况下的性能仿真，主要也是对误码率的仿真函数(This code describes the frequency-hopping system without two-way diversity in cases where performance simulation, is largely a function of the BER simulation)

说明：  输入一串字符，统计其中各种字符：大小写字母、数字、空格、其他字符的个数(input string of characters, statistics on various characters : uppercase and lowercase letters, numbers, spaces, a number of other characters)

matlab中文帮助文档,matlab强大的数据处理和图像处理能力(matlab help in Chinese)

alpha稳定分布概率密度函数产生，应用于水声环境中混响噪声信号概率密度的建模，以便于研究水下信号传输(alpha stable distribution probability density function generator, used in underwater acoustic environment reverberation noise signal probability density modeling, in order to study the underwater signal transmission)

watertank simulink example for pid

实现基于BPSK的直接扩频信号调制，并显示出各阶段信号波形。(Direct-based BPSK modulated spread spectrum signal, and shows the signal waveform of each phase.)

最小二乘法，无论是在工程上还是在学术上都应用越来越广泛，文章给出了一个比较好用的最小二乘matlab 实现程序，很好用下载即可运行。(Least squares method, whether in engineering or applied more widely both the academic, the article gives a least squares matlab implementation relatively easy to use program, good to run with the download.)

支持向量机的MATLAB程序，实现行为检测(MATLAB support vector machine procedures to achieve behavior detection)

说明：  蒙特卡罗方法可以有效地解决复杂的工程问题，而MATLAB具有强大的数值计算功能。将二者结合使用，可以得到高效的解决问题的方法。本文阐述了该方法并通过实例验证了该方法的正确性和优越性。 (Monte Carlo method can effectively solve complex engineering problems, and MATLAB has powerful function of numerical calculation. The two in combination, can be cost-effective solution to the problem. This paper describes the methods and examples of the method to verify the correctness and superiority.)

fdtd code original calculation