spectrograms

说明：  实现网吧免费上网功能，当点击结账号，不锁屏，不蓝屏，不关机，正常使用~(To achieve free internet cafe features, click the knot when the account does not lock screen, no blue screen, not shutdown, normal use ~)

matlab程序报错意思释疑，非常有用哦(matlab program error means the construction, very useful oh)

k-means clustering is a method of vector quantization, originally signal processing, that is popular for cluster analysis in data mining. k-means clustering aims to partition n observations into k clusters in which each observation belongs to the cluster with the nearest mean, serving as a prototype of the cluster. This results in a partitioning of the data space into Voronoi cells.

说明：  IEEE33节点的潮流计算，比较适合学习(Power flow calculation of 33 nodes)

说明：  对萨德系统AN/TPY-2雷达的威力范围进行仿真计算。原创！！(The power range of SAD AN/TPY-2 radar is simulated. Original!!)

用一阶梯度法，共轭梯度法和变尺度法求解多变量的寻优问题，其中单变量的寻优用的是0。618法(One method used ladder, conjugate gradient method and the variable metric method for solving multi-variable optimization problems, single-variable optimization using the 0.618 Act)

MATLAB IMPLEMENTATION OF STAR ALGORITHM

基于matlab的灰色预测的代码大全，能够实现不同的灰度预测结果，有利于初学者对灰度预测的把握，有利于学习练习和应用(Different gray forecast results can be achieved based on gray prediction matlab code Daquan, help beginners grasp grayscale forecast is conducive to learning exercises and applications)

利用周期图法对序列的功率谱进行估计。数据窗采用汉明窗。假设在白噪声中分辨这三个不同频率的正弦信号,其相位是均匀分布在2PI的独立随机变量,而 是一个单位白噪声.生成50个长度为N=512的 的样本序列集合。 (use map cycle sequencing method of the power spectrum estimation. Data window using Hamming window. Assume that the white noise to differentiate between the three different frequency sinusoidal signal, its phase is uniformly distributed in the PI two independent random variables. but a flat white noise. Generating 50 length N = 512 samples of the sequence set.)

卫星轨道书中附带的C++程序，很好地一本书，对于卫星设计很重要(The book comes with a satellite orbit C++ program, a good book, it is important for the satellite design)