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DWTbyMatlab
数字水印技术是近年来图像保护技术研究领域的一个热点,本文提出了一种基于小波变换的图像数字水印嵌入算法的Matlab实现。实验结果表明,该算法具有较好的视觉效果和透明性。
(Abstract The digital watermarking technology is the most active topic in image protecting recently.In this paper,
a digital watermarking algorithm based on Wavelet transform is proposed,and give ou the program of this algorithm by
MatLab.The experimental results demonstrate that the method possess good vision effect and transparence.
Keywords Image protecting Wavelet transform Digital Watermarking Matlab
)
- 2010-06-04 22:43:33下载
- 积分：1
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fadingoqpsk
通信原理实验matlab仿真中衰落信道下的偏移四进行相移键控(Matlab simulation of communication theory experiment fading channels to offset four-phase shift keying)
- 2010-12-08 18:06:52下载
- 积分：1
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kuopin
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)
- 2011-01-09 16:54:26下载
- 积分：1
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GeodeticTransformations
一组用来计算不同参考椭球下的坐标变换函数(Geodetic Transformations
A set of functions to calculate coordinate transformations between different reference ellipsoids
and different projections.)
- 2012-03-20 20:01:25下载
- 积分：1
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Relay-Feedback-Auto-Tuning-of-PID-Controllers
Trajectory Tracking Control of a Car-Trailer System
- 2013-10-01 04:15:37下载
- 积分：1
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Rectifier
基于电压外环，电流解耦内环的三相PWM整流器仿真，电压外环采用PID控制，电流内环采用滑模控制，可以正常运行。(The three-phase PWM rectifier based on the voltage outer loop and the current decoupled inner loop is simulated, the voltage outer loop is controlled by PID, and the current inner loop is controlled by sliding mode.)
- 2021-04-28 16:18:44下载
- 积分：1
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gcc.pdf.tar
gcc and gnu compilers
- 2009-04-16 22:23:49下载
- 积分：1
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fan
中央空调系统风机混风模型，simulink模型(Central air-conditioning system fan mixing air model, simulink model)
- 2011-05-06 14:23:26下载
- 积分：1
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gray_base
灰色模型基础程序，可以供正在数学建模的人使用(Gray model-based procedures, can be used for people who are using mathematical modeling)
- 2011-08-23 19:18:15下载
- 积分：1
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CM4x
channel uwb model for indoor communication
- 2013-04-17 19:37:30下载
- 积分：1
