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递归实现一个集合的所有的子集的输出。 例如{1，2} 输出{}{1}{2}{1，2}(A subset of the output of recursion)

说明：  数字通信塔，用增量调制将模拟信号转换为离散的数字信号，在基带中采用Miller码编码，信道编码采用汉明码，调制方式采用PSK,通过AWGN信道传输。(A digital communication system，PCM encoding converts analog signals into discrete digital signal, uses Miller code coding in baseband and Hamming code in channel coding , then PSK modulation way )

the source code for bicubic and cubic spline image analysis. This is done in the Matlab. It can process the image and make it clear

录制一段噪声，利用matlab对该材料进行声音的频谱分析。(Record a noise, the use of the material to matlab sound spectrum analysis.)

matlab传动系统扭振GUI计算程序，MATLAB7.0版本以上，算法采用了符号运算方式。(GUI drive system torsional vibration matlab program, MATLAB7.0 version of the above, the algorithm uses symbolic algorithms.)

The model of continuous system described by equations of state are given space in the file csfunc.m. This S-function simulates the continuous system with two inputs, two outputs and two state variables.

说明：  以航标、测绘和通信为主的三大板块，是我国水上交通安全保障体系的重要组成部分，承担 着船舶航行的技术支持和航运经济的服务保障职能，对我国水上交通安全形势的持续稳定发挥了 不可替代的重要作用。从上世纪七、八十年代起，随着我国水上交通安全监督体制改革的逐步深 入，航标、测绘、通信等机构先后经历了数次体制改革、机构变化和职责调整，逐步建立了具有 中国特色的航海保障体系。 (To buoy, mapping and communication of the three main sections, is an important part of water transportation security system, technical support and bear the shipping service guarantee economic functions of the ship sailing on a steady water traffic safety situation in our country to play an irreplaceable important role. From the 1970s, since the 1980s, with the gradual deepening of China' s reform of water traffic safety supervision, aids to navigation, mapping, communications and other institutions have experienced several reforms, institutional change and responsibilities adjustment, gradually established with Chinese characteristics maritime security system.)

Matlab生成Erlang分布随机数的m文件。Erlang分布能拟合其他几乎所有的分布，更具有一般性。(Matlab to generate random numbers m Erlang distribution file. Erlang distribution can fit almost all other distributions, more general.)

很好的matlab课件，值得大家来学习学习.(Good matlab courseware, worthwhile for us to learn from him.)

an class is created having different properties of material