In this paper, we develop a novel application of independent component analysis (ICA) based auto-regression forecasting model(ICAARF). The method can noninvasively, continuously and conveniently derive ambulatory bloo...
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In video streaming service, multicast mode is a promising way to complement unicast delivery of content, since it deliveries the video content to a broad range of receivers. It is considered as an efficient scheme to ...
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ISBN:
(纸本)9781479935130
In video streaming service, multicast mode is a promising way to complement unicast delivery of content, since it deliveries the video content to a broad range of receivers. It is considered as an efficient scheme to reduce redundant traffic in the networks. In this paper, we propose an OpenFlow based architecture for implementing Scalable Video Coding (SVC) multicast streaming. It enables in-network identifying, processing and manipulating the media streams, which makes prompt bitrate adaptation possible in response to network fluctuations. The heterogeneous video quality demand from the heterogeneous device also can be satisfied by customizing the multicast traffic through a centralized OpenFlow controller. We implement a testbed following the proposed architecture in our campus. With OpenFlow, we deploy IP multicast in a new way without Internet Group Management Protocol (IGMP) or any multicast addresses. Experiments implemented on the testbed show that our approach can provide a flexible and controllable video multicast streaming service and improve the usage of bandwidth resource in the condition of guaranteeing multicast receivers' Quality of Experience (QoE).
In cloud environment, all kinds of idle resources can be pooled to establish a resource pool, and different kinds of resources can be combined as a service to the users through virtualization. Therefore, an effective ...
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The upconversion energy transfer mechanism in Tb3+-Yb3+ co-doped SiO2-Al2O3-CaF2 glass is investigated by time-resolved spectra. The effect of donor ion Yb3+ is involved in the dynamic decay behavior of acceptor ion T...
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The upconversion energy transfer mechanism in Tb3+-Yb3+ co-doped SiO2-Al2O3-CaF2 glass is investigated by time-resolved spectra. The effect of donor ion Yb3+ is involved in the dynamic decay behavior of acceptor ion Tb3+, which provides direct proof for the energy transfer from Yb3+ to Tb3+. The pump power dependence curves show that the upconversion luminescence is a two-photon process. The measured decay curves of the 5D4 state (Tb3+) contain two parts: a slow decay process corresponding to its radiation, and a fast one with a decay parameter approximately twice the lifetime of the 2F5/2 state (Yb3+). The fast decay process is contradictory to the generally accepted cooperative sensitization upconversion rate equation model. Since the effect of the host environmental is excluded by comparative experiments, we believe that there should be another energy transfer mechanism in Tb3+-Yb3+ co-doped SiO2-Al2O3-CaF2 glass in addition to the cooperative sensitization process.
During the strip laminar cooling process, the switching of cooling valves is decided by different operating modes, initial and rolling-terminating conditions. Aimed at shortening the development cycle and at the same ...
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Adopting MPC to a fast changing system has always been a challenging problem due to the computational *** the equivalent aggregation strategy and the fast algorithm based on MPC proposed, the computational efficiency ...
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ISBN:
(纸本)9781479947249
Adopting MPC to a fast changing system has always been a challenging problem due to the computational *** the equivalent aggregation strategy and the fast algorithm based on MPC proposed, the computational efficiency has been promoted greatly. This paper improves the fast algorithm combined with the equivalent aggregation strategy, and investigates the feasibility of adopting the fast algorithm based on MPC to DC-AC power inverter system which switching time is 52 μs. Simulation and the experiment have verified that the fast online MPC algorithm applied on the fast sampling system with embedded platform implementation works well.
Since the energy constraint is a fundamental issue for wireless sensor networks(WSNs),the expectation of network lifetime has become a critical performance *** actual applications,due to the data traffics may fluctuat...
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Since the energy constraint is a fundamental issue for wireless sensor networks(WSNs),the expectation of network lifetime has become a critical performance *** actual applications,due to the data traffics may fluctuate randomly,there is a compelling need for a routing strategy that is robust to the variation amplitude of time varied data *** this paper,we jointly consider the lifetime maximization and a routing strategy with robustness,both of which are in compliance with the framework of cross-layer *** two correlated subproblems can be further modeled as a nonlinear optimization *** using the risk measures defined in the financial mathematics,the proposed optimization problem can be relaxed while the non-convex constraint can be transformed into a solvable *** Simulation results are further provided to validate our robust routing proposal.
This paper is concerned with the parameter and state estimation problem in the presence of the observer gain perturbations for a class of fractional order nonlinear systems which are linear in the unknown parameters a...
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This paper is concerned with the parameter and state estimation problem in the presence of the observer gain perturbations for a class of fractional order nonlinear systems which are linear in the unknown parameters and nonlinear in the states. According to the equivalent frequency distributed model of fractional integrator, the direct Lyapunov approach is adopted to derive a nonlinear adaptive non-fragile observer. The gain for the non-fragile observer is systematically obtained in terms of linear matrix inequality(LMI). A numerical example is provided to illustrate the efficiency and validity of the proposed approach.
In this paper,we propose a control algorithm for quadruped walking robots to track the Zero Moment Point(ZMP)trajectory using Preview *** critical moment of trot pace,we can assume the robot as a linear inverted pendu...
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ISBN:
(纸本)9781479947249
In this paper,we propose a control algorithm for quadruped walking robots to track the Zero Moment Point(ZMP)trajectory using Preview *** critical moment of trot pace,we can assume the robot as a linear inverted pendulum so that the linear inverted pendulum model can be applied to describe the dynamic behavior of our quadruped robot.A preview controller therefore is designed for this non-minimum phase system to get the optimal input of the *** reference trajectory can be decomposed into two *** is on the direction of movement,and the other is on the vertical direction of *** the preview controller we can track the reference in both two directions and the optimal trajectory tracking can be achieved.
In this paper, two multiple description coding schemes are developed, based on prediction-induced randomly offset quantizers and unequal-deadzone-induced near-uniformly offset quantizers, respectively. In both schemes...
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