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图像去噪声，图像中有噪声，可去除噪！！！！！！！！！！(image remove noise )

一、观察序列频谱，观察信号通过系统后波形与频谱的变化。 系统函数，根据正准型结构（canonical form）编写样本处理算法。 (First, observe the sequence of the spectrum, observing the signal waveform and frequency spectrum through the system after the changes. System function, according to canonical structure (canonical form) the preparation of a sample processing algorithm.)

说明：  介绍的关于matlab的基本所有函数的使用小知识点，对学习matlab的很有用(Introduced on all functions matlab basic knowledge of the use of small points, the learning of useful matlab)

说明：  利用时域有限差分（FDTD）仿真三维（3D）电磁波的传播，吸收边界条件为完全匹配层（PML）。(The use of finite difference time domain (FDTD) simulation of three-dimensional (3D) electromagnetic wave transmission, absorbing boundary condition for the perfectly matched layer (PML).)

有详细的OFDM的LS，MMSN算法，注释，允许结果均有效(Detailed OFDM-LS, MMSN algorithm, notes, allowing the results are valid)

this document deescribed step by step approach to learn matlab programming easy and efficient way for beginners

本论文首先介绍了当前深空通信的编码调制技术的现状与发展，阐述了以往 的深空通信中的编码和调制技术的方案和局限性，提出LDPC码和FQPSK调制的 优越性和发展前景。第二章描绘了LDPC码的奇偶校验矩阵的图形表示、生成方 式和译码方法，并比较二元LDPC码和多元LDPC码的优越性和实现问题。第三 章在介绍FQPSK调制的方案的由来、改进和发展的基础上，对其进行了功率谱分 析，介绍了一些常规的解调方案。(This paper introduces the current situation and development of the technology of deep-space communication code modulation on the coding and modulation techniques in deep space communications program and limitations of the proposed of LDPC codes FQPSK modulation superiority and development prospects. Chapter II depicts a graphical representation of the LDPC code of the parity check matrix generation method and decoding method, and compare the superiority of binary LDPC codes and multiple LDPC code and implementation problems. Chapter origin in the introduction FQPSK modulation program, improvement and development on the basis of its power spectrum analysis, conventional demodulation.)

用于频谱细化，是《matlab在振动信号处理应用》一书中的实例(Spectrum refinement matlab vibration signal processing applications, " a book instance.)

Metodo de Newton para resoluç ã o do sistema de 3 barras

说明：  单纯形法matlab程序，输入A,b,c，得到整个过程的单纯形表与最优解，最优值，每一步变换的单纯形表都有给出，完全没有错，很详细，有运行结果说明。(The simplex method matlab program, input A, B, C, get the simplex table and the optimal solution of the whole process, the optimal value, the simplex table of each step transformation are given, there is no error at all, very detailed, there are running results.)