Liqiang Jiang

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In this paper, we study the VoIP capacity in cognitive radio system. As the cognitive user, VoIP packets arrival from a poisson process and use the wireless channels transparently. We formulate the whole dispose procedure as a birth and death processes, and establish preemptive multi-channel model under the consideration of delay and dropping rate(More)
In this letter, the voice over IP (VoIP) capacity in Cognitive Radio system is studied with single and multiple channels. A special Cognitive Radio (CR) system is used, the Cognitive radio system adopt the frequency of near 700M Hz, a wireless channel can be modeled as a two-dimensional discrete-time Markov chain. The traffic of a single VoIP user is(More)
PURPOSE To evaluate the efficacy and safety of supplemental transcatheter arterial chemoembolization (TACE) through the extrahepatic collateral omental artery (OA) for hepatocellular carcinoma (HCC). METHODS We retrospective evaluated extrahepatic collateral OA on 34 patients, among 1826 patients with HCC who had undergone TACE. TACE of the OA was(More)
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