python 程序

浮点复数基2时分FFT完成适当的FFT，输出改写输入缓冲器。(floating-point complex FFT-based two hours to complete the FFT output rewritten input buffer.)

介绍线性算子的基本概念的文章,这是书里面的一个章节(Foundation of linear operator theory)

含约束的优化问题求解案例，算法简单，求解很方便实用(Constrained optimization problem solving case, the algorithm is simple, easy to solve, practical)

根据已知的邻接矩阵画出对应的网络图，节点用蓝点表示，连接用线表示(According to the adjacency matrix of the known draw the corresponding network diagram, the node with the blue dot, and connected with lines)

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)

说明：  Matlab是计算结构力学的好助手,计算结构力学(MATLAB is a good assistant in computational structural mechanics)

采用分段逐步计算，结合快速傅立叶变化，计算群速色散和自相位调制在光纤中对所传输的飞秒脉冲的影响。(Using split-step computation, combined with Fast Fourier Transform Algorithm, calculated the influence to transmission of the femtosecond pulse about the group velocity dispersion and the phase modulation in the fiber.)

是以有限差分算法的MATLAB实现，可以运行的，给出谐振腔的场强的表示方法(finite diffenence time domain programmed by matlab language is for cavity, and its elelctro magnetic field can be showed.)

基于Matlab产生光纤陀螺随机噪声和信号，利用固定步长和可调步长的LMS自适应滤波、最小二乘法、滑动均值三种方法进行处理，最后用阿兰方差评价降噪效果。(FOG Based on Matlab generate random noise and signal, using a fixed step size and adjustable step size LMS adaptive filtering, least squares method, the sliding average of three methods for processing, and finally with Alan variance evaluation noise reduction.)

Mathematica计算基于力平衡变截面梁单元的质量和刚度矩阵(2D force-based finite element mathemaica)