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Most resource allocation algorithms are based on interference power constraint in cognitive radio networks. Instead of using conventional primary user interference constraint, we give a new criterion called allowable signal to interference plus noise ratio (SINR) loss constraint in cognitive transmission to protect primary users. Considering power allocation problem for cognitive users over flat fading...
This paper mainly comes up with a new watermarking arithmetic about the wavelet domain based on the pretreatment of the watermark. Through the pretreatment of watermark, it can greatly reduce the embedding capacity of the watermark, or we can say it greatly enhance the embedding capacity of the watermark under the same visual effect, which can embed more watermark in the host image. In the process...
This paper has studied the technology of web service and collaborative mechanism, and designed a set of collaborative network office system by matrix collaborative model. This system has perfectly solved the complex issues about the network data transmission in the course of collaborative working. In accordance with the characteristics of web service and application requirement, the system has designed...
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