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Quality Adaptation of Intra-only Coded Video Transmission over Wireless Networks
Shu Tang,Yuanhong Deng,Peng Yang 한국정보처리학회 2023 Journal of information processing systems Vol.19 No.6
Variable wireless channel is a big challenge for real-time video applications, and the rate adaptation of realtimevideo streaming becomes a hot topic. Intra-video coding is important for high-quality video communicationand industrial video applications. In this paper, we proposed a novel adaptive scheme for real-time videotransmission with intra-only coding over a wireless network. The key idea of this scheme is to estimate theinstantaneous remaining capacity of the network to adjust the quality of the next several video frames, whichnot only can keep low queuing delay and ensure video quality, but also can respond to bandwidth changesquickly. We compare our scheme with three different schemes in the video transmission system. The experimentalresults show that our scheme has higher bandwidth utilization and faster bandwidth change response,while maintaining low queuing delay.
Global Output Feedback Regulation of Uncertain Nonlinear Systems with Unknown Time Delay
Weiyong Yu,Shutang Liu,Fangfang Zhang 제어·로봇·시스템학회 2015 International Journal of Control, Automation, and Vol.13 No.2
This paper investigates the problem of global output feedback regulation for a class of nonlinear systems with unknown time delay. It is also allowed to contain uncertain functions of all the states and input as long as the uncertainties satisfying certain bounded condition for the considered systems. In this paper, a constructive control technique has been proposed for controlling the systems. By using dynamic high-gain scaling approach and choosing an appropriate Lyapunov-Krasovskii functional, a delay-independent robust adaptive output feedback controller is constructed such that the states of the considered systems achieve global regulation. Two simulation examples are provided to demonstrate the effectiveness of the proposed design scheme.
Jingxiao Lu,Shutang Wen,Liwei Zhang,Yuxiao Li,Zhiyong Du 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.6
Two sets of μc-Si : H films as a function of pressure were fabricated by very-high-frequency plasma enhanced chemical vapor deposition (VHF-PECVD). Deposition rate, Raman crystallinity, and photo/dark conductivity were investigated under both low and high power conditions. A plasma fluid model and a surface hydride-dependent precursor diffusion model were constructed to understand the evolution of microcrystalline silicon under low and high power conditions. Silyl, hydrogen, ion flux, silyl surface diffusion length are believed to have much influence on film growth rate, crystallinity and photo electronic properties. But the interesting point is that under a certain condition one or more of these parameters dominate μc-Si : H growth, while other parameters have weak influence. Short-life radicals are found to be the possible major factor on the deterioration of photo sensitivity of μc-Si : H films.
Wang, Jianxue,Wang, Ruogu,Zeng, Pingliang,You, Shutang,Li, Yunhao,Zhang, Yao The Korean Institute of Electrical Engineers 2015 Journal of Electrical Engineering & Technology Vol.10 No.3
Traditional transmission planning usually caters for rated wind power output. Due to the low occurrence probability of nominal capacity of wind power and huge investment in transmission, these planning methods will leads to low utilization rates of transmission lines and poor economic efficiency. This paper provides a novel transmission expansion planning method for integrating large-scale wind power. The wind power distribution characteristics of large-scale wind power output and its impact on transmission planning are analyzed. Based on the wind power distribution characteristics, this paper proposes a flexible and economic transmission planning model which saves substantial transmission investment through spilling a small amount of peak output of wind power. A methodology based on Benders decomposition is used to solve the model. The applicability and effectiveness of the model and algorithm are verified through a numerical case.
Jianxue Wang,Ruogu Wang,Pingliang Zeng,Shutang You,Yunhao Li,Yao Zhang 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.3
Traditional transmission planning usually caters for rated wind power output. Due to the low occurrence probability of nominal capacity of wind power and huge investment in transmission, these planning methods will leads to low utilization rates of transmission lines and poor economic efficiency. This paper provides a novel transmission expansion planning method for integrating largescale wind power. The wind power distribution characteristics of large-scale wind power output and its impact on transmission planning are analyzed. Based on the wind power distribution characteristics, this paper proposes a flexible and economic transmission planning model which saves substantial transmission investment through spilling a small amount of peak output of wind power. A methodology based on Benders decomposition is used to solve the model. The applicability and effectiveness of the model and algorithm are verified through a numerical case.