hanning11

利用5阶WENO有限差分法求解一维Euler方程组，给出求解Sod型激波管问题的详细程序。(The use of 5-order WENO finite difference method for solving one-dimensional Euler equations given type of shock tube problem solving Sod detailed procedures.)

包括管道和边界层的大涡模拟fortran95原代码(Including pipelines and large eddy simulation of boundary layer source code fortran95)

一种新的计算马氏距离的算法，算法采用二次协方差矩阵操作，进而使距离考加入相对性因素。(a new Mahalanobis distance calculation algorithm, the algorithm using quadratic covariance matrix operations, thereby enabling the relative distance to take factors.)

这是求多柔体转子纽马克法的程序。以拉格朗日方程为基础，结合有限元发计算(is seeking more flexible rotor Newmark Act procedures. To Lagrange equation, the FEM calculation)

数学中计算曲线积分 数学工具中常用到这样的方法(Calculated curve integral mathematics math tools commonly used in such a way)

内点惩罚函数法C语言程序，适用于机械行业机械优化设计(SUMT)

对常微分方程进行数值解的matlab函数(Matlab function for numerical solution of ordinary differential equation)

说明：  用FORTRAN语言实现二维欧拉方程的求解，采用二阶MUSCL迎风格式()

说明：  迭代算法中的多重网格计算程序Visual C++原代码(iterative algorithm of multiple grid computing procedures Visual C source code)

首先根据高斯白噪声频率充满整个频带的特性，通过双树复小波包变换对高斯白噪声进行分解，利用频带能量泄漏的定量分析方法，验证了双树复小波包变换具有较低的频带能量泄漏特性；其次利用双树复小波包变换逐层分解信号，对每层分解所得分量求其FFT谱的峭度，得到基于双树复小波包变换的谱峭度图，根据图中峭度最大的原则，可以自动准确的选择信号分解最佳层数和最佳分量；最后将基于双树复小波包变换的谱峭度图的故障诊断方法应用于实际工程中，对齿轮故障振动信号进行分析，选择最佳分解层数和分量后利用希尔伯特包络解调，有效准确地提取了故障特征信息，验证了方法的可行性和有效性(The parameters of a filter were determined by experience, and that has a great influence on the results of signal processing. The discrete wavelet packet transform has a larger energy leakage of frequency band, which obviously affected the results of the envelope demodulation. It is necessary to have a method with a lower energy leakage of the frequency band before envelope demodulation. The dual tree complex wavelet packet transform (DT-CWPT) was a new signal processing method that had many good qualities. Because the energy leakage of the frequency band was smaller when the signal was decomposed by a dual tree complex wavelet packet transform, the dual tree complex wavelet packet transform was used to extract the fault feature information in the field of fault diagnosis. In this paper, first, according to the characteristics of Gaussian white noise, whose frequency was full of the whole frequency band, Gaussian white noise was decomposed by a dual-tree complex wavel)