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(1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 ((1) in certain wireless channel, the Doppler frequency shift will be caused by wireless channel output signal aliasing. Please describe the resulting aliasing of a variety of reasons (2) wireless channel Doppler spectrum there is a classical spectrum (classic spectrum), please explain such a spectral shape of the mechanism (3) Please use Simulink tools for writing code ( S-Function mode), resulting in a single Path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And please answer: prove that they used computer-generated classical spectrum is correct possible ways.)

换能器散射回波信号声强预测，可自拟发射和接收换能器的类型及指向性，海底散射强度，得到不同条件下的散射回波信号声强(Transducer scattering echo sound intensity forecasts can be self-transmitting and receiving transducers of the type and point to the seabed scattering intensity, obtained under different conditions of scattering echo signal sound intensity)

说明：  这是可在多钟人脸数据库运行的matlab程序，基于ICA,可做学习用(This is a clock face in a multi-run matlab program databases, based on ICA, do learn to use)

模拟退火算法，计算复杂函数极值，可以通过这个函数计算最值，得出最优解(Simulated annealing algorithm, the computational complexity of the function extreme value, you can calculate the value of this function, the optimal solution)

power_SwitchedReluctanceMotor.rar,功率电子领域matlab仿真文件，已经验证过，程序运行正常(power_SwitchedReluctanceMotor.rar,Power electronics field matlab simulation file, has already been verified, the normal operating procedures)

本代码为移动通信系统中瑞丽衰落信道产生的仿真代码(RayleighFadingChannelSignalGenerator)

说明：  最优化计算的牛顿法＋共轭梯度法的MATLAB程序(Optimization Newton's Law+ conjugate gradient method MATLAB)

合成孔径雷达(SAR)的点目标仿真(附件带代码程序)，适合初学者入门用，并解释了每一个语句的作用(Synthetic Aperture Radar (SAR) of the point target emulation (annex with code programs), a detailed description of the program and describes the role of the end of each program)

如果一个对象有充足的背景反差就可以轻易的从图像中检测出来。我们使用边缘检测算法 与基本形态工具来检测前列腺癌的细胞。(Detecting a Cell Using Image Segmentation)

文献资料，利用Copula函数度量整合风险的(Literature, the use of integrated risk Copula function metrics)