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Fit a multivariate gaussian mixture by a cross-entropy method. Cross-Entropy is a powerfull tool to achieve stochastic multi-extremum optimization.

说明：  GSM FS 信道仿真.main 主函数 PrimePe 加入高斯噪声的误码率曲线 Qfunct 误码率 (GSM FS channel simulation. Main main function PrimePe adding Gaussian noise bit error rate BER curves Qfunct)

说明：  3GLTE下行链路方案ofdma性能仿真 以图形的方式表示 OFDMA和sc-fdma的性能差异 信噪比等(3GLTE ofdma downlink performance simulation program to graphically express OFDMA and sc-fdma differences in SNR performance)

simulation of neural network

费聂耳衍射成像的模拟，采用透镜成像原理，有效地利用fft(simulation of the diffraction，based on the optical lens and the theory of fft)

计算LED光谱PWM，带一点算法和输入输出excel(PWM LED spectrum calculation)

NEWMARK方法求解结构动力学源程序，可求解较大自由度时的响应(newmark algorithm source)

主成分分析是把原来多个变量划为少数几个综合指标的一种统计分析方法。 从数学角度来看，这是一种降维处理技术。(Principal component analysis (PCA) is a statistical analysis method that divides a number of variables into a few comprehensive indexes.From a mathematical point of view, this is a kind of dimensionality reduction technology.)

Matlab与数值分析实验：一本比较好的MATLAB书籍，适合于初学者(Matlab and numerical analysis of experiments: a good MATLAB books for beginners)

说明：  求解路径问题,目标函数时间最短,主要适用管科物流等专业学习使用,对时间,空间复杂性没有优化.(Solving the path problem, the objective function time is the shortest, which is mainly used for professional learning and learning, such as tube logistics, and it is not optimized for time and space complexity.)