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This article takes maturity internet as a starting point and takes the Quality Open Courseware as platform. The goal is to improve student's study quality, cooperative ability, thinking ability and creative ability. So we use Collaborative Learning on the internet as the learning way. In this paper, the basic requirements, the study methods and the strategies for collaborative learning have been studied...
In this paper, we propose a method for self-embedding an audio signal into itself as a means for protecting the content of audio signal. In the proposed algorithm, the host audio signal is divided into 4 segments, and the feature of every segment is embedded in the less significant bits (LSBs) of another segment that is randomly assigned based on the secret key. And the tamper detection can be performed...
-With developing of computer networks and digital techniques, the electronic image are easily created, edited, reproduced and distributed. Unfortunately, illegal copy and malicious tamper are also facilitated. At present, fragile watermark is researched greatly to authenticate the veracity and integrity of electronic contents. In this paper, a chaotic watermarking scheme for authentication of popular...
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