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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)

计算机控制二阶最小拍有纹波阶跃输入信号matlab程序(Computer-controlled stage least beat ripple step input signal matlab program)

matlab reedsolomon code

Matlab codes for random matrix theory.

本书包含光学软件ZEMAX，设置评价函数的所有操作数的含义及使用。新手入门必备。(This book contains the optical software ZEMAX, the meaning and use of the evaluation function to set all operands. Getting Started essential.)

重型汽车车内声压级预测与主要噪声源分析 中国重型汽车正成为中国汽车产业在国际市场上最具竞争力的强势产业，但 目前国产重型汽车的 NVH（Noise,Vibration and Harshness）性能和国际先进水平 之间仍存在一定的差距。 (Heavy automotive interior SPL prediction and analysis of the major sources of noise China National Heavy Duty Truck is becoming China s auto industry the most competitive in the international market a strong industry, but At present, the domestic heavy-duty vehicles of NVH (Noise, Vibration and Harshness) performance and the international advanced level There is still a gap between.)

此程序为matlab的关于辐射增强的一段代码，已经用于开发的软件中(This procedure matlab section on the radiation code has been used to develop the software)

tutorial for matlab for image processing tool kit in power point presentation file

This is an image segmentation Program

说明：  压缩包内自带飞行数据，直接可用，附带结果说明word(The flight data is provided in the compressed package, which is directly available, and the result description word is attached)