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SICE 2004 Annual Conference

作者： Kami, Y Nobuyama, E Kyushu Inst Technol Dept Syst Innovat & Informat Iizuka Fukuoka 8208502 Japan

ISBN: (纸本)4907764227

This paper deals with the mixed H-2/D-stability control problem. In this paper, we give an iterative algorithm for finding a sub-optimal controller of this problem. The proposed algorithm produces a controller which satisfies a necessary condition to be globally optimal controller of the mixed H-2/D-stability control problem. Numerical examples show the effectiveness of our algorithm.

关键词： mixed H-2/D-stability control iterative algorithm LMI

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Utility Proportional Optimization Flow Control for Overlay Multicast

Utility Proportional Optimization Flow Control for Overlay M...

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IEEE International Symposium on Parallel and Distributed Processing with Applications

作者： Jafari, Ali Shafiei, H. Mirzasoleiman, Baharan Sepidnam, Ghodrat IPM Sch Comp Sci Tehran Iran Univ Tehran ECE Dept Tehran Iran Ferdowsi Univ Mashhad CE Dept Mashhad Iran

ISBN: (纸本)9780769537474

There was a lot of interest in multicast communications within this decade as it is an essential part of many network applications, e.g. video-on-demand, etc. In this paper, we model flow rate allocation for application overlay as a utility based optimization problem constrained by capacity limitations of physical links and overlay constraints. The optimization flow control presented here addresses not only concave utility functions which are suitable for applications with elastic traffics, but also especial forms of non-concave utilities that are used to model applications with inelastic traffics, which might demand for hard delay and rate requirements. We then propose an iterative algorithm as the solution to the optimization flow control problem and investigate especial forms of non-concave utilities that are supported by this model. Simulation results show that the iterative algorithm can be used to deal with sigmoidal-like utilities which are useful for modeling real-time applications such as live streaming.

关键词： Overlay Multicast Resource Allocation Optimization Flow Control Utility Proportional Flow Control Duality Theorem iterative algorithm

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A stochastic automaton-based algorithm for flexible and distributed network partitioning

A stochastic automaton-based algorithm for flexible and dist...

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IEEE Swarm Intelligence Symposium

作者： Wan, Y Roy, S Saberi, A Lesieutre, B Washington State Univ Pullman WA 99164 USA

ISBN: (纸本)0780389166

This paper proposes a exible stochastic automaton-based network partitioning algorithm that is capable of find-ing the optimal k-way partition with respect to a broad range of cost functions, and given various constraints, in directed and weighted graphs. Further, this iterative algorithm requires only local computation, with respect to the graph. Hence, by incorporating a distributed stopping criterion, we have been able to solve certain partitioning problems in a totally distributed manner. In this article, this inuence model-based partitioning algorithm is motivated and introduced, and is shown to find the optimal partition for a large class of problems. Also, a conceptual discussion of why the algorithm might be expected to find good partitions quickly is included, and the performance of the algorithm is illustrated through examples. Applications in partitioning distributed communicatin-agent networks, sensor systems, and power grids are discussed.

关键词： directed graphs distributed algorithms stochastic automata distributed communicating-agent network distributed network partitioning distributed stopping criterion iterative algorithm optimal k-way partition power grid sensor system stochastic automaton-b Power grids stochastic automata Sensor systems iterative algorithms directed graphs distributed algorithms FLEXIBLE partitions algorithms DISTRIBUTED NETWORKS Partitioning algorithms Cost functions

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Graph convergence for the H(.,.)-mixed mapping with an application for solving the system of generalized variational inclusions

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Fixed Point Theory and Applications 2013年第1期2013卷 1-21页

作者： Husain, Shamshad Gupta, Sanjeev Mishra, Vishnu Narayan Department of Applied Mathematics Faculty of Engineering and Technology Aligarh Muslim University Aligarh 202002 India Department of Applied Mathematics and Humanities Sardar Vallabhbhai National Institute of Technology Surat 395 007 India

In this paper, we investigate a class of accretive mappings called the H(., .)-mixed mappings in Banach spaces. We prove that the proximal-point mapping associated with the H(., .)-mixed mapping is single-valued and Lipschitz continuous. Some examples are given to justify the definition of H(., .)-mixed mapping. Further, a concept of graph convergence concerned with the H(., .)-mixed mapping is introduced in Banach spaces and some equivalence theorems between graph-convergence and proximal-point mapping convergence for the H(., .)-mixed mappings sequence are proved. As an application, we consider a system of generalized variational inclusions involving H(., .)-mixed mappings in real q-uniformly smooth Banach spaces. Using the proximal-point mapping method, we prove the existence and uniqueness of solution and suggest an iterative algorithm for the system of generalized variational inclusions. Furthermore, we discuss the convergence criteria for the iterative algorithm under some suitable conditions. © 2013 Husain et al.;licensee Springer.

关键词： Graph convergence H(., .)-mixed mapping iterative algorithm Proximal-point mapping method System of generalized variational inclusions

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Reconfigurable Intelligent Surface Empowered Underlaying Device-to-Device Communication

Reconfigurable Intelligent Surface Empowered Underlaying Dev...

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IEEE Wireless Communications and Networking Conference (WCNC)

作者： Yang, Gang Liao, Yating Liang, Ying-Chang Tirkkonen, Olav Univ Elect Sci & Technol China Chengdu Peoples R China Aalto Univ Aalto Finland

ISBN: (纸本)9781728195056

Reconfigurable intelligent surfaces (RIS) are a new and revolutionary technology to achieve spectrum, energy- and cost-efficient wireless networks. This paper studies the resource allocation for RIS-empowered device-to-device (D2D) communication underlaying a cellular network, in which an RIS is employed to enhance desired signals and suppress interference between paired D2D and cellular links. We maximize the sum rate of D2D users and cellular users by jointly optimizing the resource reuse indicators, the transmit power and the RIS's passive beamforming. To solve the formulated non-convex problem, we first propose an efficient user-pairing scheme based on relative channel strength to determine the resource reuse indicators. Then, the transmit power and the RIS's passive beamforming are jointly optimized by an iterative algorithm, based on the techniques of alternating optimization, successive convex approximation, Lagrangian dual transform and quadratic transform. Numerical results show that the proposed design outperforms the traditional D2D network without RIS.

关键词： Device-to-device communication reconfigurable intelligent surfaces passive beamforming power allocation iterative algorithm

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A Nuclear Norm Minimization Approach to System Identification with Finite Word-Length Data

A Nuclear Norm Minimization Approach to System Identificatio...

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36th Annual Conference of the IEEE Industrial-Electronics-Society (IECON)/4th IEEE International Conference on E-Learning in Industrial Electronics/IES Industry Forum

作者： Konishi, Katsumi Kogakuin Univ Fac Informat Dept Comp Sci Tokyo Japan

ISBN: (纸本)9781424452262

This paper provides a nuclear norm minimization approach to an identification of linear systems with finite word-length data. Measurement data sampled from low resolution sensors are sequence of a few bit data and have large quantization errors, which deteriorate the identification accuracy. In this paper, the identification problem is formulated as a rank minimization problem, and the nuclear norm heuristic is introduced to estimate the model order and precise values of finite word-length data. An iterative algorithm is proposed based on the weighted nuclear norm minimization and its semidefinite programming formulation. Numerical examples demonstrate that we can estimate both the model order and parameters and show the effectiveness of the proposed method.

关键词： digital control finite word length data iterative algorithm iterative methods linear system linear systems low resolution sensor mathematical programming measurement data minimisation nuclear norm heuristics nuclear norm minimization approach quantisation (signal) quantization error rank minimization problem roundoff errors semidefinite programming formulation system identification

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A novel Preconditioned Conjugate Gradient Image Reconstruction algorithm For Electrical Capacitance Tomography System

A novel Preconditioned Conjugate Gradient Image Reconstructi...

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International Conference on Materials Science and Technology

作者： Chen Yu Cao Jun Chen Deyun NE Forestry Univ Mech Engn Postdoctoral Res Stn Harbin Peoples R China Comp Inst Harbin Univ Sci & Technol Harbin Peoples R China

ISBN: (纸本)9783037850152

To solve the 'soft-field' nature and the ill-posed problem in electrical capacitance tomography (ECT)technology, a novel preconditioned conjugate gradient algorithm for electrical capacitance tomography is presented. The analysis of the basic principles of electrical capacitance tomography, based on the given preconditioned conjugate gradient method and calculation formula of the iteration steps of the ECT and to explore the feasibility of application of the algorithm, the algorithm to meet the convergence conditions and the reconstruction image error. Experimental results and simulation data indicate that the algorithm can provide high quality images and favorable stabilization compared with LBP, conjugate gradient algorithms in simple flow pattern and this new algorithm presents a feasible and effective way to research on image reconstruction algorithm for Electrical Capacitance Tomography System.

关键词： electrical capacitance tomography image reconstruction iterative algorithm conjugate gradient

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Reconfigurable Intelligent Surface Empowered Symbiotic Radio over Broadcasting Signals

Reconfigurable Intelligent Surface Empowered Symbiotic Radio...

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IEEE Global Communications Conference (GLOBECOM) on Advanced Technology for 5G Plus

作者： Xu, Xinyue Liang, Ying-Chang Yang, Gang Zhao, Lian Univ Elect Sci & Technol China Chengdu Peoples R China Ryerson Univ Toronto ON Canada

ISBN: (纸本)9781728182988

This paper studies reconfigurable intelligent surface (RIS) empowered symbiotic radio over broadcasting signals, i.e., a base station (BS) broadcasts to multiple primary receivers (PRs) under the assistance of a RIS, while the RIS also transmits information to an Internet-of-Things receiver (IR) by modulating the incident broadcasting signals. We formulate a problem to minimize the BS's transmit power by jointly optimizing the BS's active beamforming and the RIS's phase shifts (i.e., passive beamforming), under the signal-to-noise-ratio constraints of the primary and IoT transmission as well as the RIS's phase-shift constraints. However, the problem is challenging to be solved optimally, since the optimization variables are coupled and the constraints are non-convex. An efficient iterative algorithm based on the block coordinated descent and modified semidefinite relaxation techniques is proposed to solve this problem for both discrete and continuous phase shift scenarios. The convergency of the algorithm is proved and the complexity of the algorithm is analyzed. Numerical results validate that the proposed system outperforms the benchmark of traditional broadcasting system without RIS.

关键词： Reconfigurable intelligent surface symbiotic radio passive beamforming iterative algorithm

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DYNAMICAL MODEL FOR EVOLUTION OF ROCK MASSIVE STATE AS A RESPONSE ON A CHANGING OF STRESS-DEFORMED STATE

DYNAMICAL MODEL FOR EVOLUTION OF ROCK MASSIVE STATE AS A RES...

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3rd International Conference on Heterogeneous Material Mechanics (ICHMM 2011)

作者： Hachay, O. A. Khachay, A. Y. Inst Geophys UB RAS Ekaterinburg 620016 Russia Ural State Univ Ekaterinburg 620000 Russia

ISBN: (纸本)9781605950549

For research of the medium response with hierarchic structure we had developed an iterative algorithm for electromagnetic and seismic fields in the problem setting similar to analyzed higher for layered-block models with homogeneous inclusions. From the received results we did a conclusion, that the higher the rank of hierarchy of the medium the hardly diminishes the similarity between seismic and electromagnetic results, and the obtained information has a nondependent sense, which underlines the complexity of the researched medium.

关键词： Hierarchic medium structure iterative algorithm seismic and electromagnetic fields

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The Fuzzy PID Controller Design Base On Nonlinear U-model 30

The Fuzzy PID Controller Design Base On Nonlinear U-model

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30th Chinese Control and Decision Conference (CCDC)

作者： Xu, Fengxia Wang, Zhilong Song, Xiaohui Wang, Shanshan Qiqihar Univ Comp & Control Engn Coll Qiqihar 161006 Peoples R China

ISBN: (纸本)9781538612446

Nonlinear modeling is studied in this paper, the Nonlinear model is set by time varying polynomial and the ShengJin formula is introduced to solve the roots of Newton-Raphson, then change the Nonlinear model to the U-model. Base on the typical the PID controller, the currency U-model Fuzzy PID system is designed with the Fuzzy algorithm and the structure of U-model. The new controller keeps the generality of PID controller and enhances the accuracy of nonlinear system,it is theory support that the nonlinear system control can be solved.

关键词： U-model Shengjin Formula iterative algorithm Fuzzy control

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