jce0728

A speech signal filterbank, using melscale frequency and framebanking.( 1. For speech signal can be represented as a discrete sequence of frames (or feature vectors) that can be used as the input to a speech recogniser. Important ideas and techniques that are used in the assignment are the design of a (Mel frequency scale) audio filterbank, , windowing of a continuous audio signal, spectrum analysis of the signal, filtering as multiplication in the frequency domain, the visual representation of a speech signal as a spectrogram, appreciation of the acoustic variability in real speech utterances. 2. To gain a deeper knowledge of the application of MATLAB programming to audio signal processing. 3. To gain practice in the art of writing a formal report: structure, content, style, use of diagrams, presentation etc. etc. )

求从1到20的阶乘，并且可以推广到N阶阶乘，。(Demand from 1 to 20 factorial, and can be extended to N-order factorial,.)

说明：  用MATLAB实现GMSK信号的产生与解调(Using MATLAB to achieve GMSK signal generation and demodulation)

研究Chen系统的混沌运动，通过理论分析与数值计算分析系统基本动力学性质，并通过系统相图、全局分 岔图与Lyapunov指数图分析该Chen混沌系统动力学行为．(Chen chaotic motion of the system, through theoretical analysis and numerical calculation and analysis system of basic dynamic properties and phase diagram of the system, the global bifurcation diagram and Lyapunov exponent analysis of the Chen chaotic system dynamics.)

t-tide工具包，用于海洋潮汐分析处理，剔潮，计算调和常数等数据处理与计算。(t-tide toolkit for the analysis and processing of ocean tides tick tide calculated harmonic constants and other data processing and calculation.)

说明：  matpowe4.1 Open source software, no modified version downloaded from the official website, different matpower may not apply with each other program

《MATLAB统计分析与应用：40个案例分析》源程序 数据(The " MATLAB statistical analysis and application: 40 Case Studies" source data)

％help avifile 可以把屏幕图片做成avi ％也可以用如下打开和播放avi ％ mv=aviread( 14.avi ) ％ movie(mv) ％ 指定源目录 str_src ％ 指定图片个数，PICNum( Help avifile can make avi screen images can also be used as follows to open and play avi mv = aviread (14.avi) movie (mv) specify the source directory specified str_src picture number, PICNum)

Sobel edge detection algoritmh to detec edge.

矩形域上的二阶椭圆差分格式，适合偏微分方程的学习，是有限差分格式(this is the equetion about the partial differetial equotion)