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Calculate a gradient by using a mask (sqrt(R² + I² ).(Calculate a gradient by using a mask (sqrt(R² + I² ).)

％realize overlapped-save method ％y:output sequence ％x:input seqence ％h:filter impulse response sequence ％N:length of each segment ％重叠保留法实现分段卷积 ( Realize overlapped-save method y: output sequence x: input seqence h: filter impulse response sequence N: length of each segment overlap to retain sub-convolution method)

模拟退火法求函数的最小值 结束条件为两次最优解之差小于某小量(End condition of the simulated annealing method and function of the minimum of twice the optimal solution of the difference is smaller than some small amount of)

斯坦福大学机器学习课程的一个源代码例子，对于机器学习和deep learning的学习研究很有帮助(this codes are from standford university,which are about machine learning and deep learning.they will be helpful in this research field)

about nuclear reactor and control of them. it is presented a new method

说明：  基于Matlab的移动通信中多径衰落信道的仿真\基于多径传输和多普勒频移的 瑞利（Rayleigh）信道的仿真 主要考虑不同条件下的仿真(Matlab-based mobile communications in the multipath fading channel simulation \ based multi-path transmission and Doppler frequency shift of the Rayleigh (Rayleigh) channel simulation the main consideration of the simulation under different conditions)

Three phase full wave rectifier simulation using matlab, simulink

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.)

自由电子激光，超短束团，滑移计算，matlab模拟(free-electron laser, ultrashort bunch, slip, Matlab simulation)

Adsorption Codes, for chemical Engineering, Auther codes, Doung Do