ellipse

说明：  本程序实现了短数据序列不同窗函数的welch功率谱估计，然后又求了他们的平均标准差，从而判断各个窗函数的优劣。只要稍作修改就能实现不同信噪比下的功率估计，同时也可以实现长数据序列的估计。(This procedure has a short data series of different welch window function power spectrum estimation, and then seek their average standard deviation, and thus to determine the merits and demerits of each window function. As long as we can with some slight modifications under different signal to noise ratio power estimate, but also the realization of a long data sequence can be estimated.)

discuss the cooling of a circular fin by means of convective heat transfer along its length. Convection gives rise to a temperature-dependent heat loss or sink term in the governing equation. Shown in Figure 4.9 is a cylindrical fin with uniform crosssectional area A. The base is at a temperature of 100°C (TB) and the end is insulated. The fin is exposed to an ambient temperature of 20°C

一个OFDM符号128个有效符号，插入128个虚拟子载波 符号率（即有效数据率）fsymbol，而发送速率（需要包括虚拟子载波）2fsymbol 输入的数据需要2倍的发送数据率，以便进行内插，实现位定时跟踪，即4倍fsymbol采样率的调制信号 OFDM symbol Nfft=128 points 一个OFDM符号数据点 Nfft*2 = 256 ， Guard Interval点 ＝Ng*2=64 (128 of an OFDM symbol of a valid symbol 128 inserted virtual sub-carrier Symbol rate (the effective data rate) fsymbol sending rate (including virtual subcarriers) 2fsymbol Of the input data needs to be 2 times the transmission data rate, in order to carry out the interpolation, to achieve the bit timing tracking, i.e. four times the sampling rate modulation signal fsymbol OFDM symbol Nfft = 128 points One OFDM symbol data points nfft* 2 = 256, the Guard Interval dot = Ng* 2 = 64)

等幅震荡pid，simulink模块，已经过调试(Amplitude shock pid, simulink module, has been commissioning)

Control of stepper motor using matlab.

这是一个经典的把matlab应用于DFT的例子,适合于初学者(This is a classic application of Matlab put DFT example, suitable for beginners)

这是秦永元所著的《惯性导航》一书，根据其中的内容用matlab中的simulink编写的关于惯导基本原理的小程序，适合初学者学习，修改加以应用(the Inertial Navigation of simulink)

说明：  戈泽尔算法—源程序.rar (添加噪声和滤波等)(Gauzere algorithm- source code. Rar (adding noise and filtering))

Matching Pursuit方法，经典的稀疏表示方法，可以用人脸识别和图像分类，图像去噪，现在非常流行。(Matching Pursuit method, sparse representation of the classic, you can use face recognition and image classification, image denoising, now very popular.)

C语言与MATLAB接口编程实例，主要是一些C语言与MATLAB 接口的程序，希望对大家有用(C language MATLAB interface programming examples, some of the C language and MATLAB interface program, and hope to be useful)