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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.)

this file consists files witch can use aco for tsp

Mode of operations dc dc converter

The function computes the basic harmonic of the signal, in the form: x(t) = amp*cos(w*t - ph) + (higher Harmonics) These values are typically useful in power systems, audio signal processing, and other related fields.(The function computes the basic harmonic of the signal, in the form: x(t) = amp*cos(w*t - ph) + (higher Harmonics) )

混沌粒子群CPSO，内附混沌粒子群的相关理论和改进的论文(Chaotic particle swarm CPSO, the related theory of chaotic particle swarm and the improved thesis)

Code for FIFO the first

说明：  各种滤波，例如中值滤波，平均滤波的源代码，进行图像平滑(A variety of filtering, for example, median filtering, average filtering of the source code for image smoothing)

在Matlab中，用PCA程序提取两个统计量：T2和Q从而应用在机械故障的预测中，我个人觉得还可以，希望大家指正。(In Matlab, with the PCA program to extract the two statistics: T2 and Q and thus used in the prediction of mechanical failure, I personally felt that I can and hope that we corrected.)

北京历年降水量线性模型分析——matlab，跟新到2012年(Calendar Beijing precipitation linear model analysis- matlab, with the New 2012)

瑞利分布＋杂波雷达信号MATLAB仿真程序，希望对有做雷达信号得朋友有帮助(Rayleigh distribution miscellaneous radar signal MATLAB simulation program, and they hope to have a friend make a radar signal has to help)