Jianwei Zhang

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Recent years mesh-based Peer-to-Peer live streaming has become a promising way for service providers to offer high-quality live video streaming service to Internet users. In this paper, we make a detailed study on modeling and performance analysis of the pull-based P2P streaming systems. We establish the analytical framework for the pull-based streaming(More)
This paper is focused on head modeling using the sophisticated realistic finite element method (FEM) with five-layer tissues based on segmented data. First, the location of every pixel of the FEM head model was fixed on according to the registration method based on the magnetic resonance imaging (MRI) and computer tomography (CT) images. Then the location(More)
In this paper, we study many antenna beamforming algorithm research in cognitive radio two-way relay system. In this system, two primary users exchange information by second users, and the second users to configure multiple antennas, a user through the superposition signal sends it to the primary users, therefore in this article research the key problem is(More)
Random scheduling strategy has been emphasized and recommended in push-based P2P streaming systems due to its simplicity and high efficiency, and so is the latest first strategy in file sharing systems. However, how to take advantage of the low playout delay feature in the latest first strategy and the high playout probability feature in the random strategy(More)
BitTorrent has proved to be the most effective and popular P2P file distribution application. In order to improve the topological features and take full advantage of each peer's upload capacity in BitTorrent overlay, the disadvantages of topological features and the utilization of each peer's upload capacity in BitTorrent overlay was analyzed and UC-track,(More)
Peer-to-peer (P2P) systems have proved the most effective and popular file sharing applications in recent years. Previous studies mainly focused on equal service and differentiated service strategies when peers have no initial data before their downloads. For an upload-constrained P2P file sharing system, we model both the equal service process and the(More)
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