Beginners_code

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)

说明：  matlab数值积分工具箱自己加入到工具箱就能够使用了(matlab numerical integration toolbox itself can be added to the toolbox used)

Part of the license plate recognition locator feature, STM32 all the information produced by the MP3, The final weight matrix is ??the filter coefficient.

平面梁单元算例，比较通用的程序，用来平时计算比较方便(plane beam for computing)

自己按J David的方法做的7个Hu时刻，用于边缘检测(7 HU moments，similitude Moments，matlab)

在本讲义中，我们将着重讲述一些数学建模中常用的算法，包括神经网络算法、遗传算法、模拟退火算法和模糊数学方法。(In this lecture, we will focus on talk about some commonly used mathematical modeling algorithms, including neural networks, genetic algorithm, simulated annealing algorithm and fuzzy mathematics.)

Route trajectory with variable speed

平移数组元素的实例程序。来自编程珠玑。非常有用。(rotate array， sample code from programming pearls.)

模式识别中txt数据的导入算法，大家看看，做个参考(Pattern recognition algorithms in the txt data import, we look to be a reference)

How to access parallel port in MATLAB