AdaBoost

用matlab&spss实现聚类分析,源自《计量地理学》（徐建华，华东师范大学）。(Achieve with matlab & spss cluster analysis.)

return all combinations of the elements of a set

说明：  利用MATLAB实现OFDM系统中AWGN信道(using MATLAB OFDM system AWGN)

这是一个相对完整的OFDM通信系统的仿真设计，包括编码，调制，IFFT，上下变频，高斯信道建模，FFT，PAPR抑制，各种同步，解调和解码等模块，并统括系统性能的仿真验证了系统设计的可靠性。 (This is a relatively complete simulation of OFDM systems design,including coding,modulation,IFFT, up and down conversion, Gaussian channel model, FFT, PAPR suppression of synchronization, demodulation and decoding modules, and systems, including system performance simulation verifies the reliability of system design.)

调制识别是非协作通信中的关键技术之一，在电子对抗、软件无线电等领域 应用十分广泛。该过程介于信号检测与解调之间，由于对传输信号没有过多的先 验信息以及在接收端有很多未知的参数，例如：信号功率，载波频率和相位偏移， 时间信息等，导致对调制方式的盲识别是一项很困难的任务。此外，实际中存在 多径衰落、频率选择性和时变信道等问题，使得这项任务变得更具有挑战性。 (The modulation recognition is one of the key technologies of the non-cooperative communication, such as electronic countermeasures and software defination radio, therefore it is such a significant discipline and orientation in the research of communication field. Obviously, without enough knowledge in transmitter and verified parameters about receivers, for example signal power, carrier frequency and phase offsets and so force, it is hard to get the modulation of blind identification. What is more, for the sake of the multipath fading, frequency-selective and time-varying channels in the real scenarios the task is even harder. )

杂草识别，使用gui,代码图像都有，对于做识别杂草很有启发。(Weeds recognition, using GUI, code images have, for identifying weed is very enlightening.)

minmax filtering in matlab

说明：  对带噪图象进行处理，削去不必要的东西，抗干扰，(right image processing, cut unnecessary things, interference,)

相关系数计算的模拟,用于衡量两个数列的相关程度(coherence coefficient calculation)

说明：  　尺度不变特征转换(Scale-invariant feature transform 或 SIFT)(Scale Invariant Feature Transform (Scale-invariant feature transform, or SIFT))