pr4

现需要在高度为600~700KM范围内，回归周期为30天的太阳同步轨道上布置一颗L波段的合成孔径雷达卫星。 1. 请设计合适的轨道参数，并仿真对应轨道下一个运行周期内星下点轨迹图（纬度和经度两个图）； 2. 计算多普勒中心频率，多普勒调频率与纬度的关系图（设姿态角为0°，天线视角20°~60°，推荐35°）； 3. 按高斯投影方式，将星下点轨迹图投影到地图坐标上。(Now requires a height of 600 ~ 700KM range, return period of 30 days are arranged on a sun-synchronous orbit L-band Synthetic Aperture Radar satellites. 1 Please design the appropriate orbital parameters and simulate the corresponding orbit within the next operating cycle nadir trajectories (latitude and longitude two graphs) 2. Calculate the Doppler center frequency, Doppler frequency and the relationship between latitude Figure (set attitude angle is 0, the antenna angle of 20 to 60, recommended 35) 3 Press Gauss projection, the nadir trajectories projected onto the map coordinates.)

svd水印算法,运用svd分解来嵌入水印，抗噪性和鲁棒性都很好(svd watermarking algorithm)

元胞自动机的生命游戏用matlab实现，非常好的一个程序(Coway s Life is a very good program)

matlab程序，本程序为样本熵程序，程序可运行，是很好的特征提取参数.(matlab procedures, the procedures for sample entropy, the program can be run, is a good feature extraction parameters.)

Localization problem(A matlab code for sensor localization)

非常方便的读写固定列宽的时间日期数据，读文件与存文件都是文本格式(Very convenient to read and write fixed column width of the time and date data, read the file and save files are text format)

利用MATLAB编写的带有GUI界面的矩阵计算器，可实现一般的功能，及其扩展功能(Matrix calculator using MATLAB prepared with a GUI interface, enabling the general functions and extensions)

dipum_images_ch08 matlab教程(dipum_images_ch08 matlab tutorial)

用遗传算法求解约束问题，用matlab编程(Using genetic algorithm, the use of matlab constraint problems)

说明：  function [ret,x0,str,ts,xts]=s3(t,x,u,flag) s3 is the M-file description of the SIMULINK system named s3. The block-diagram can be displayed by typing: s3. SYS=s3(T,X,U,FLAG) returns depending on FLAG certain system values given time point, T, current state vector, X, and input vector, U. FLAG is used to indicate the type of output to be returned in SYS.