hw3

DTMF goertzel function, it is really helpful for other beginners who want to do the DTMF

绘制控制系统近似bode图，为了做自动控制原理作业时偷点懒。虽然matlab自带bode函数但是作业要求画近似的。(Drawing control system approximation bode diagram, when you steal lazy to do the job of Automatic Control Theory. Although matlab function but the job comes bode asked to draw approximate.)

模式识别，感知器训练算法Matlab演示(Pattern recognition, perceptron training algorithm Matlab demo)

matlab绘图方面的很好的幻灯片，内容比较实用，有兴趣的可以看看。(matlab mapping good slides, the content more practical, interested can look at.)

说明：  有关MATLAB的学习资料，清华大学出版的(MATLAB information about the study, published by Tsinghua University)

VDSL的下行链路仿真。1.下行（局端到用户端）速率：20Mbps，上行（用户端到局端）速率：5Mbps；传输距离为500m；在Eb/N0 = 15dB时实现误比特率Pe<=10-4 2.可用信道频谱：0.138MHz-12MHz 3.双绞线模型采用RLCG模型，传输介质为0.4mm PE cable (simulation of VDSL down link)

This program will detect the license plate region with segmentation and extraction and recognition

matlab使用各种滤波函数实现图片的去噪处理(using the function denoising )

直升机的三个姿态角的pid控制算法，matlab中的simulink仿真程序，配合最优pid设计算法，得到很好的控制效果(Three attitude angle of the helicopter pid control algorithm matlab in simulink simulation program, with the optimal pid design algorithm, well controlled)

图像检索中的相似性度量方法主要是街区距离的研究(Image Retri similarity measure blocks away the main study)