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1. Global Practical Tracking by Output-Feedback forNonlinear Systems with Unknown Growth Rate and Time-delay | |||
Xuehua Yan, Xinmin Song | |||
Information Science and System Science 14 May 2014 | |||
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Abstract:This paperconsiders the global practical tracking problem by output-feedback fora class of uncertain nonlinear systems with not only unmeasured states dependent growthbut also time-varying time delay.Compared with the closely related works, the remarkableness of the paper is that thetime-varying time delay and unmeasurable states are permitted in the system nonlinear growth. Motivated by therelated tracking results, and flexibly using the ideas and techniques of universal control anddead zone, an adaptive output-feedbacktracking controller is explicitly designed with the help of a new Lyapunov-Krasoviskii functional, to makethe tracking error prescribed arbitrarily small after a finite time while keep all the closed-loopsignals bounded. | |||
TO cite this article:Xuehua Yan, Xinmin Song. Global Practical Tracking by Output-Feedback forNonlinear Systems with Unknown Growth Rate and Time-delay[OL].[14 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4597352 |
2. Multi-Leader Multi-Follower Game Based Power Control for Downlink Heterogeneous Networks | |||
HAN Qiaoni,Yang Bo,CHEN Cailian,GUAN Xinping | |||
Information Science and System Science 01 April 2014 | |||
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Abstract:Heterogeneous networks (HetNets) are expected to be an integral component of expansion of 3G and emerging 4G network deployments. However, in order to achieve the QoS requirements of all the users, interference mitigation techniques need to be developed to manage the radio resources of macrocells and small cells. In this paper, we focus on the optimal power allocation for downlink HetNets. Specifically, we take into account the different deployment targets and service requirements of macrocell base stations (BSs) and small cells (corresponding to picocells and femtocells), and classify them into two categories according to their deployment, namely, operator deployed BSs (OBSs) and customer deployed BSs (CBSs). Then, the framework of Stackelberg game with multiple leaders and multiple followers is adopted to investigate the downlink power allocation problem. To obtain the Stackelberg equilibrium (SE) distributively, we develop the power updating rules for both OBSs and CBSs. Moreover, the implementations of the proposed game are discussed. At last, numerical results show the convergence of the proposed game and the uniqueness of the SE. | |||
TO cite this article:HAN Qiaoni,Yang Bo,CHEN Cailian, et al. Multi-Leader Multi-Follower Game Based Power Control for Downlink Heterogeneous Networks[OL].[ 1 April 2014] http://en.paper.edu.cn/en_releasepaper/content/4592002 |
3. Average consensus of multi-agent systems with event-triggered communication | |||
FANYuan | |||
Information Science and System Science 18 March 2014 | |||
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Abstract:In this paper the average consensus problem of multi-agent systems under event-triggered control and communication is investigated. In event-triggered consensus, an event of each agent occurs only when the state measurement error exceeds a given threshold. By appropriate event design, discontinuous threshold is employed and thus continuous communication among agents can be avoided to reduce energy consumption in practice. Moreover, it is showed that the proposed event-triggered control can achieve average consensus with fewer events and faster consensus rate compared with existing works. Simulation results illustrate the effectiveness of the proposed approach. | |||
TO cite this article:FANYuan. Average consensus of multi-agent systems with event-triggered communication[OL].[18 March 2014] http://en.paper.edu.cn/en_releasepaper/content/4590321 |
4. Structure Identification for Gene Regulatory Networks via Linearization and Robust State Estimation | |||
Xiong Jie, Zhou Tong | |||
Information Science and System Science 21 February 2014 | |||
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Abstract:Inferring causal relationships among numerous cellular components is one of the fundamental problems in understanding biological behaviors. The model of gene regulatory networks (GRNs) is widely considered as a nonlinear dynamic stochastic model consisting of a gene measurement equation and a gene regulation equation, in which the extended Kalman filter (EKF) is sometimes used for estimating both the model parameters and the actual value of gene expression levels. First-order approximations, however, unavoidably result in modelling errors, but the EKF based method does not take either unmodelled dynamics or parametric uncertainties into account, which makes its estimation performances not very satisfactory. As a result, estimation performances of the EKF based method may not be satisfied with slow convergence speed and low estimation accuracy. To overcome these problems, a sensitivity penalization based robust state estimator is suggested for reconstructing the structure of a GRN. The suggested method has been used to identify an artificially constructed non-linear GRN. Compared with the widely adopted EKF based method, simulation results show that the convergence speed is distinctly improved, and parametric estimation accuracy is significantly increased, which make both the false positive error and the false negative error significantly reduced. Moreover, computation results with a real GRN of extit{yeast} show that the proposed method can identify causal relationships effectively, which may help us to better understand the structure and dynamics of GRNs in practice. | |||
TO cite this article:Xiong Jie, Zhou Tong. Structure Identification for Gene Regulatory Networks via Linearization and Robust State Estimation[OL].[21 February 2014] http://en.paper.edu.cn/en_releasepaper/content/4586446 |
5. Flocking of Multi-agent dynamical system in Lattice configuration | |||
Wen Yang | |||
Information Science and System Science 16 January 2014 | |||
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Abstract:This paper considers a group of mobile agents moving in Euclidean space with switched network topology. We propose a feedback control algorithm that achieves velocity consensus with weighted directed switched velocity graph and stabilize all position neighboring agents inter-distance to a same desired value. Due to switched position/velocity graph introducing discontinuities in the agent local control laws, we employ nonsmooth analysis and differential inclusion to analyze the stability properties of the multi-agent system. The main results are that the position and velocity graph remaining connected/weakly connected are satisfied at all times, then alpha-Lattice can always be realized. Furthermore, if the initial energy of the system is less than a certain value depending on alpha-Lattice, then collision can be avoided.????? | |||
TO cite this article:Wen Yang. Flocking of Multi-agent dynamical system in Lattice configuration[OL].[16 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4575017 |
6. Multi-goals rendezvous problem in multi-agent systems | |||
YANG WEN | |||
Information Science and System Science 05 January 2014 | |||
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Abstract:This paper considers a class of multi-goal rendezvous problem. In a system with a group of vehicles and two virtual leaders, the vehicles need to be formed into two subgroups and rendezvous around the leaders. A local PI controller is designed for convergence of the system. We prove that the system can be stabilized if algebraic connectivity of interconnection graph is among a range. The single rendezvous problem is a special case of the problem presented in this paper. | |||
TO cite this article:YANG WEN. Multi-goals rendezvous problem in multi-agent systems[OL].[ 5 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4577991 |
7. Fractional Order Control and Its Application to Tether Satellite Deployment | |||
Sun Guanghui, Zhang Zengjie , Peng Peng | |||
Information Science and System Science 24 December 2013 | |||
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Abstract:This paper is concerned with the application problem for fractional order controller on tether satellite deployment. Fractional order PID has been generalized to state space representation. A new fractional order control law has been proposed according to the feature of tether satellite deployment.By introducing the fractional order tether rate and tether length in state feedback, the tether can be deployed with faster speed and smaller overshot than its integer order counterpart. Theoretical analysis and numerical example areprovided to valid the effectiveness of the proposeddesign method. | |||
TO cite this article:Sun Guanghui, Zhang Zengjie , Peng Peng. Fractional Order Control and Its Application to Tether Satellite Deployment[OL].[24 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4576917 |
8. Nonsmooth Control Design of a Class of Dual-Actuator Systems | |||
ZHENG Kai, GU Jinbai, WANG Xingcheng, SHEN Tielong | |||
Information Science and System Science 23 December 2013 | |||
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Abstract:Tracking control design for a class of nonlinear dual-actuator systems is examined in this paper. The system is modelled as a nonlinear primary actuator with unknown dynamics plus an explicit nonlinear secondary actuator. Nonsmooth two-step design is proposed to the system with a time-based control algorithm for the primary actuator and the nonsmooth feedback controller for the secondary actuator so that the asymptotic tracking for the time-varying signal can be achieved. Numerical example is carried out to verify the proposed the design method. | |||
TO cite this article:ZHENG Kai, GU Jinbai, WANG Xingcheng, et al. Nonsmooth Control Design of a Class of Dual-Actuator Systems[OL].[23 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4577763 |
9. New Sliding Mode Controller Design with Uncertain Sliding Surface | |||
ZHENG Kai, SHEN Tielong, WANG Xingcheng, JIANG Yi | |||
Information Science and System Science 02 December 2013 | |||
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Abstract:The problem of design a sliding mode controller with uncertain sliding surface for a class of nonlinear systems is considered. The design case involves the matched and unmatched uncertainties. In the new sliding phase design, the measurable uncertainties can be included in the sliding surface. It's shown that the sliding mode design needs not consider the uncertainties of the sliding surface, which can be handled in the reaching phase design. The results generalize the robust design of the reaching phase such that one specific reaching phase design may agree with the uncertain sliding surface. | |||
TO cite this article:ZHENG Kai, SHEN Tielong, WANG Xingcheng, et al. New Sliding Mode Controller Design with Uncertain Sliding Surface[OL].[ 2 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4571818 |
10. Sliding Mode Control of Fractional Order Switched Hybrid Systems | |||
Sun Guanghui, Peng peng | |||
Information Science and System Science 20 November 2013 | |||
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Abstract:This paper is concerned with the sliding mode control for fractionalorder switched systems involving the matched unknown perturbation.Some results for integer switched control system are extended to classesof fractional order switched system. The sliding manifold is firstlyanalyzed by introducing an asymptotically vanishing term. To steerthe system onto the fractional order sliding manifold, a first-ordersliding mode approach is introduced. Theoretical analysis and numerical example areprovided to show the effectiveness of the proposeddesign method. | |||
TO cite this article:Sun Guanghui, Peng peng. Sliding Mode Control of Fractional Order Switched Hybrid Systems[OL].[20 November 2013] http://en.paper.edu.cn/en_releasepaper/content/4569352 |
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