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In energy constrained wireless sensor networks, node scheduling is an effective approach to improving the energy efficiency and prolonging the network lifetime. In this paper, we propose a distributed, lightweight, and location-unaware scheduling scheme for randomly deployed wireless sensor networks. The basic idea of the scheduling scheme is to organize sensor nodes into disjoint node sets, which...
Mispronunciation detection is one of the vital tasks of the CALL (Computer Assisted Language Learning) systems. Many methods have been introduced to accomplish this task. However, few of them have addressed the detection task on confusable phones. In this paper, phone-level classifiers are utilized to improve the detection performance on the confusable phones. Features of the classifiers are posterior...
Most Active Queue Management (AQM) algorithms keep the queue length of the router at a reference value. While when the network traffic is heavy, these algorithms tend to cause high packet loss ratio, large queue oscillations, etc. To address these issues, a new method called Auto-tuning Reference Queue (ARQ) is proposed in this paper, which can be incorporated in any existing AQM algorithms with fixed...
In this paper, a simple and effective attack on a non-blind robust digital watermark method, cocktail watermarking, was proposed. After reviewing the principle of the cocktail watermarking, the paper discovered that the cocktail watermarking scheme can drive a very high false positive probability although with high robustness simultaneously. Furthermore, a counterfeiting attack to generate a watermarked...
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