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车牌号码识别检测程序，能快速有效检测车辆号码(License plate number recognition testing procedures, fast and effective detection of vehicle numbers)

help for possiton analysis of robot

Demo Software: SIFT Keypoint Detector(This page provides access to a demo version of David Lowe s SIFT keypoint detector in the form of compiled binaries that can run under Linux or Windows.)

声波波动方程数值模拟。地震的一个小程序。适合初学者看看。大神就不用下了(Numerical simulation of the acoustic wave equation. Earthquake a small program. Suitable for beginners to see. God would not have got big)

说明：  16PSK系统仿真，m文件程序分析了系统的误码率，作出了仿真误码率曲线，与理论误码率曲线进行比较感觉不错。(16PSK system simulation, m file program analysis of the BER, bit error rate curve to the simulation, and compare theoretical BER curves feel good.)

演示matlab如何实现通信遥控等,其中涉及到一些通信方面的知识,请查阅相关资料.()

本程序是用matlab写的，实现对图像进行二维预测与Lloyd-Max量化压缩。是有损压缩。附有程序所用的图片。(The program is written in matlab to achieve two-dimensional projections of images and Lloyd-Max Quantization. Is a lossy compression. With a program with pictures.)

直接序列扩频系统（DS，Direct Sequence）又称为直接序列调制系统或伪噪声系统（PN 系统），简称为直扩系统，是目前应用较为广泛的一种扩展频谱系统。要传送的信息经伪随机序列编码后对载波进行调制。在发信端越冬用扩频序列去扩展信号的频谱，在收信端，用相同的扩频友序列进行解扩，将展宽的频谱扩展信号还原成原始信号。因为伪随机序列的速率远大于要传送信息的速率，所以受调信号的频谱宽度将远大于要传送信息的频谱宽度，帮称之为扩频(Direct sequence spread spectrum (DS, Direct Sequence) modulation system, also known as direct sequence or pseudo-noise system (PN system), referred to as direct expansion systems, is currently the more widely used as a spread spectrum system. To send the information encoded by the pseudo-random sequence of carrier modulation. End of winter in the letter to extend the signal with the spreading sequence of spectrum, in the end prepared to receive and use the same sequence spread spectrum despreading friends, broadening the spectrum to restore the original signal expansion signals. Because the rate of pseudo-random sequence is much larger than the rate of information to be sent, so the frequency spectrum by adjusting the width of the spectrum is much larger than the width of the information to be sent to help is called spread spectrum)

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MATLAB实现圆环阵方向图，方位角为九十度，以及最大峰值旁瓣电平(MATLAB realize the circle array pattern, an azimuth of ninety degrees, and the maximum peak side-lobe level)