underwter

该链路仿真了OFDM系统在克服瑞丽多径衰落的影响中性能，并使用了理想信道估计。(The link of the OFDM system simulation Ruili in overcoming the effects of multipath fading in the performance and the use of an ideal channel estimation.)

该matlab函数可以在matlab环境下读取pgm文件(To read the file of pgm format)

说明：  面波反演的一个例子。。。。 里面有文件说明 相信大家会好好利用的(Surface wave inversion of a case in point. . . . There are documents that I believe we will make good use of the)

这个是对于ofdm衰落的一个仿真，里面的程序较全，并且难度不大，对于初学者来说具有借鉴意义。(This is a simulation for ofdm fading, inside the program than the whole, and not difficult for beginners with a reference.)

说明：  对新冠肺炎病例传播数据进行清洗，并进行可视化，包含流向地图和桑基图。(The novel coronavirus pneumonia transmission data were cleaned and visualized, including flow maps and sonkey maps.)

说明：  介绍了常用的MATLAB 图像处理命令，并用实例说明用法(Describes commonly used MATLAB image processing commands, and use examples of usage)

经典的香农采样定理认为,为了不失真地恢复模拟信号,采样频率应该不小于奈奎斯特频率(即模拟信号 频谱中的最高频率)的两倍.但是其中除了利用到信号是有限带宽的假设外,没利用任何的其它先验信息.采集到 的数据存在很大程度的冗余.Donoho等人提出的压缩感知方法(Compressed Sensing或Compressive Sampling, CS)充分运用了大部分信号在预知的一组基上可以稀疏表示这一先验信息,利用随机投影实现了在远低于奈奎斯 特频率的采样频率下对压缩数据的直接采集.该方法不仅为降低采样频率提供了一种新思路,也为其它科学领域 的研究提供了新的契机.该文综述性地阐述了压缩感知方法的基本原理,给出了其中的一些约束问题和估计方法, 并介绍压缩感知理论的相关问题———矩阵填充,最后讨论了其未来可能的应用前景. (According to the conventional Shannon s sampling theorem,in order to represent the analog signal,the sampling rate should not be less than twice the Nyquist sampling rate.Howev- er,this theorem only makes use of the bandwidth information.As a result,the collected data contain many redundant information.The recently proposed sampling method,compressed sens- ing or compressive sampling(CS),can collect compressed data at the sampling rate much lower than that needed in Shannon s sampling theorem by exploring the compressibility of the signal. This paper presents a review on the basic theory of CS.Some of the restrictions and recovery methods in CS are also discussed.Finally,some potential applications based on CS are presented. )

说明：  matlab中的关于代数方程组的解法实验方面的例子和程序(matlab in the solution of algebraic equations in terms of examples and experimental procedures)

说明：  matlab乘子法，用于解带有约束的目标优化问题，约束条件既可以是线性又可以是非线性(matlab multiplier optimize，)

matlab车牌识别源码，完整的编译通过的程序和测试图片哦(matlab ticket recognition source code)