UMAT-subroutine

HHT变换中用于边际谱与FFT比较的一个源码。本人亲试，出的图形基本满足要求。你可以下来看看。(HHT marginal spectrum for the transformation of a source compared with the FFT. I pro-test, the graphics basically meet the requirements. You can look down.)

说明：  AP聚类算法的源代码，基于matlab程序，有较详细解说(AP clustering algorithm source code, based on matlab program, a more detailed explanation)

说明：  implementing DF at the relay node

基于ANSYS APDL二次开发的航电设备的动力学扫频分析，载荷输入条件为交越频率以下为恒定位移，交越频率以上为恒定加速度。我将加速度输入转换为位移输入，将位移和加速度两段输入载荷统一按照位移载荷输入，将位移存入表数组，利用ANSYS APDL自动将扫频范围内的位移载荷存入表数组，并循环加载计算，实现了该工程结构的正弦扫频振动分析。(Kinetic sweep analysis, load input conditions of secondary development based on ANSYS APDL avionics for the crossover frequency less constant displacement, above the crossover frequency is constant acceleration. I will convert the input displacement input acceleration, displacement and acceleration loads unity in accordance with the displacement of the two input load input, the displacement of the array into the table using ANSYS APDL automatically load displacement within the sweep range of the array into the table, and cyclic loading calculated to achieve a swept sine vibration of the project structure.)

灰度 GM（1.1）模型：灰色系统其内部一部分信息已知，另一部分信息未知或不确定。对既含有已知信息又含有不确定信息的系统进行的预测，也就是对在一定范围内变化的、与时间序列有关的灰过程进行 预测。(Gray GM (1.1) model of grey system: the internal part of the information known, the other part of the information is unknown or uncertain. In which there are both known information and uncertain for the prediction information system, is also the process of gray change in a certain range, with the time series related to Prediction.)

这是中国数学建模中编程交流上概率算法内容，里面提供了很多概率算法的例子(This is the exchange of mathematical modeling in the programming content on a probability algorithm, which provides many examples of probabilistic algorithms)

This a two dimensional level set code that extends quanities off the interface using a first order Godunov scheme.

本程序对同一文本在不同语言版本（英语，德语，芬兰语）下的单词频率进行统计，来检测齐夫定律(Zipf s law)在不同语言下的变化。(This procedure of the same text in different languages ​ ​ (English, German, Finnish) the word frequency statistics, to detect Zipf' s law (Zipf' s law) in different languages ​ ​ under the changes.)

With this document, is intended to show some manipulation of signal processing techniques regarding continue and discrete signals, odd and even components, and periodic discreet signal, showing the mathematical part and the source code in Matlab on which it’s possible to try it out.

IT gives the IFFT of the given signal