2014911LMD

说明：  em algorithm used in GMM

matlab檔案，用於時間格式轉換，可將UnixTime格式轉換成UTC格式(Time format convert)

Mann-Kendall 程序，现在常常被用于处理分析大气、海洋等长时间序列数据，分析数据变化的显著性以及出现显著变化的时间节点 第一二个程序用于高等数学线性方程的求解；(Mann-Kendall of matlab ，being used to analysis the change of data line solution)

说明：  它能够产生S形nlfm信号，可以直接运行放心使用(It can generate S-shaped nlfm signal)

DDS的matlab环境下function函数(The DDS function function in Matlab environment)

基于Matlab的电磁波极化仿真。实际教学和学习中会遇到电磁极化问题，本文中给出了Matlab程序的设计，有需要的同学可以下载一下，仔细研读。(Matlab simulation based on the polarization of electromagnetic waves. Actual teaching and learning experience electromagnetic polarization problem, this paper gives the design Matlab program, students may need to download it, carefully read.)

power law for image enhancement

克里金法广泛地应用于地下水模拟、土壤制图等领域，是一种很有用的地质统计格网化方法。它首先考虑的是空间属性在空间位置上的变异分布．确定对一个待插点值有影响的距离范围，然后用此范围内的采样点来估计待插点的属性值。该方法在数学上可对所研究的对象提供一种最佳线性无偏估计(某点处的确定值)的方法。它是考虑了信息样品的形状、大小及与待估计块段相互间的空间位置等几何特征以及品位的空间结构之后，为达到线性、无偏和最小估计方差的估计，而对每一个样品赋与一定的系数，最后　进行加权平均来估计块段品位的方法。(Kriging is a technique that provides the Best Linear Unbiased Estimator of the unknown fields (Journel and Huijbregts, 1978 Kitanidis, 1997). It is a local estimator that can provide the interpolation and extrapolation of the originally sparsely sampled data that are assumed to be reasonably characterized by the Intrinsic Statistical Model (ISM). An ISM does not require the quantity of interest to be stationary, i.e. its mean and standard deviation are independent of position, but rather that its covariance function depends on the separation of two data points)

随机减量法用于从随机振动信号中提取结构的自由衰减响应信号(Random Decrement Technique （RDT）is used to extract damped free vibration form random vibration )

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