Titlebook: Web Information Systems and Mining; International Confer Fu Lee Wang,Jingsheng Lei,Xiangfeng Luo Conference proceedings 2012 Springer-Verla

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Port-Based Composable Modeling and Simulation for Safety Critical System Testbeds a variety of application domains. This contribution discusses basic researches for a port-based object (PBO) approach to integrated M&S of testbed. We give the formal description of PBO with the safety property and describe the method of composable design based on PBO, and then illustrate this approach by a simple example.

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A Post-filtering Technique for Enhancing Acoustic Echo Cancelation Systemr is terms as “l(fā)eakage” and is used in adjusting adaptation step size and calculating the post-filter gain. The proposed technique improves the convergence speed and performance of the conventional AEC systems and is simple to implementation.

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Packet Dropping Schemes and Quality Evaluation for H.264 Videos at High Packet Loss Rateseriments for three video sequences. Experiment results show that both the packet type and the packet distribution have an impact on the video quality. Given higher packet loss rates, dropping a few B frames in a GOP results in less quality degradation than dropping packets randomly from all the B frames.

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