ACF_ploting

说明：  最近邻聚类算法,本程序利用图示来显示聚类之后的结果，效果直观(NearestNeighbor algorithm)

全国大学生数学建模问题,是非常重要的国家级赛程，这对于我们很有帮助的啊！(National Mathematical modeling is very important for evey students,so it is very good for prevent students,and,it is good for our.)

说明：  正态总体参数的检验,调用ztest和ttest函数(Inspection normal population parameters)

K-means聚类算法，参加模式识别第二版 清华大学出版社(K-means clustering algorithm, to participate in pattern recognition, the second edition of Tsinghua University Press)

利用gobor算法，实现人眼虹膜分割的一个matlab程序。(Gobor algorithm, human iris segmentation matlab program.)

说明：  matlab中的神经网络工具箱，可以利用其中的工具方便、快捷的完成任务(of Matlab Toolbox neural networks, which can use the tool to conveniently and quickly complete their mission)

用混沌理论和广义回归神经网络进行短期负荷的预测，取得了满意的效果(with Chaos Theory and the general regression neural network for short-term load forecasts, achieved satisfactory results)

火星轨道坐标系下的卫星动力学方程，用于航天工程计算(Mars satellite dynamic equations in orbit coordinate system )

A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special case.Polyalphabetic substitution ciphers are useful because the are less easily broken by frequency analysis, however if an attacker knows for instance that the message has a period n, then he simply can individually frequency analyze each cipher alphabet. The number of letters encrypted before a polyalphabetic substitution cipher returns to its first cipher alphabet is called its period. The larger the period, the stronger the cipher. Of course, this method of encryption is certainly not secure by any definition and should not be applied to any real-life scenarios.

说明：  用Gardner算法时钟同步的BPSK的源程序(Gardner algorithm for clock synchronization with the source code BPSK)