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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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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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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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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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Multiuser charging control in wireless power transfer via magnetic resonant coupling 40

Multiuser charging control in wireless power transfer via ma...

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40th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015

作者： Vedady Moghadam, Mohammad R. Zhang, Rui ECE Department National University of Singapore Singapore

ISBN: (纸本)9781467369978

Magnetic resonant coupling (MRC) is a practically appealing method for realizing the near-field wireless power transfer (WPT). The MRC-WPT system with a single pair of transmitter and receiver has been extensively studied in the literature, while there is limited work on the general setup with multiple transmitters and/or receivers. In this paper, we consider a point-to-multipoint MRC-WPT system with one transmitter sending power wirelessly to a set of distributed receivers simultaneously. We derive the power delivered to the load of each receiver in closed-form expression, and reveal a 'near-far' fairness issue in multiuser power transmission due to users' distance-dependent mutual inductances with the transmitter. We also show that by designing the receivers' load resistances, the near-far issue can be optimally solved. Specifically, we propose a centralized algorithm to jointly optimize the load resistances to minimize the power drawn from the energy source at the transmitter under given power requirements for the loads. We also devise a distributed algorithm for the receivers to adjust their load resistances iteratively, for ease of practical implementation. © 2015 IEEE.

关键词： iterative algorithm magnetic resonant coupling multiuser charging control optimization Wireless power transfer

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A first evaluation of the realistic supelec-breast phantom

A first evaluation of the realistic supelec-breast phantom

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IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology

作者： Rydholm, Tomas Fhager, Andreas Persson, Mikael Meaney, Paul M. Department of Electrical Engineering Chalmers University of Technology Gothenburg412 58 Sweden Thayer's School of Engineering Dartmouth College HanoverNH03755 United States

A microwave tomographic system is used to evaluate the realistic breast phantom developed at the Supelec institute. The system utilizes 16 monopole antennas and a modern vector network analyzer (VNA) to measure the phantoms influence on the S-parameters. An iterative algorithm is then used to solve the inverse problem and reconstruct a 2-D plane transecting the phantom. The reconstructed images are compared to the ones recovered from a cylindrical phantom of equivalent phantom media. The results show that both phantoms are possible to reconstruct, although the interior of the Supelec phantom is more challenging. © 2016 IEEE.

关键词： Phantoms Electric network analyzers Inverse problems iterative methods Medical imaging Monopole antennas Scattering parameters Tomography Breast Cancer Breast phantom Cylindrical phantoms iterative algorithm Microwave imaging Reconstructed image Tomographic systems Vector network analyzers

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A New System of Generalized Variational Inclusions Involving H-η-monotone Operators in Uniformly Smooth Banach Spaces

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Communications in Mathematical Research 2012年第4期28卷 324-336页

作者： FENG SHI-QIANG GAO DA-PENG School of Mathematics and Information China West Normal University Nanchong Sichuan 637002

In this paper, we introduce and study a new system of generalized vari- ational inclusions involving H-η-monotone operators in uniformly smooth Banach spaces. Using the resolvent operator technique associated with H-η-monotone opera- tors, we prove the approximation solvability of solutions using an iterative algorithm. The results in this paper extend and improve some known results from the literature.

关键词： uniformly smooth Banach space H-η-monotone operator resolventoperator technique system of generalized variational inclusion iterative algorithm

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Imaging bottom zone of fluidised beds by electrical capacitance tomography

Imaging bottom zone of fluidised beds by electrical capacita...

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Conference on Process Imaging for Automatic Control

作者： Liu, S Yang, WQ Wang, H Jiang, F Univ Manchester Inst Sci & Technol Dept Elect Engn & Elect Manchester M60 1QD Lancs England

ISBN: (纸本)0819438537

It is difficult to know the details of material distribution in a fluidised bed. Electrical capacitance tomography (ECT) technology has been developed for imaging industrial processes containing dielectric materials. This paper discusses the principles of ECT and presents the first experimental results of using ECT to measure gas/solids distribution in square circulating fluidised beds (CFB). A wide range of fluidisation conditions was tested, from bubbling to circulating fluidisation. It has been shown that over the range, ECT can provide solids concentration and voids distribution instantaneously. Different fluidisation regimes could also be identified from the reconstructed images.

关键词： electrical capacitance tomography fluidised bed image reconstruction iterative algorithm

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A NEW AND EFFICIENT iterative APPROACH TO IMAGE MATCHING

A NEW AND EFFICIENT ITERATIVE APPROACH TO IMAGE MATCHING

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Conference A on Computer Vision and Image Processing, at the 12th IAPR International Conference on Pattern Recognition

作者： ZHANG, ZY INRIA F-06902 SOPHIA ANTIPOLISFRANCE

ISBN: (纸本)0818662654

This paper addresses the problem of matching two images with unknown epipolar geometry. A new and efficient iterative algorithm is proposed, which is a part of the author's project on developing a robust image matching technique. The author defines a new measure of matching support, which allows less contribution and higher tolerance of deformation with respect to affine transformations from distant matches than from nearby ones. A new strategy for updating matches is developed, which only selects those matches having both high matching support and low matching ambiguity. The update strategy is different from the classical ""winner-take-all"", which evolves too soon and is easily stuck at a local minimum, and also from ""loser-take-nothing"", which is usually very slow. The proposed algorithm has been tested with two dozen image pairs of very different types of scenes, and very good results have been obtained. It works remarkably well in a scene with many repetitive patterns.

关键词： image matching iterative approach image matching iterative algorithm matching support deformation toleration affine transformations high matching support low matching ambiguity repetitive patterns

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Robust Image Feature Point Matching Based on Structural Distance 1

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10th Chinese Conference on Image and Graphics Technologies and Applications (IGTA)

作者： Hu, Maodi Liu, Yu Fan, Yiqiang Aisino Corp Digital Technol Acad Beijing 100195 Peoples R China Beijing Normal Univ Ctr Informat & Network Technol Beijing 100875 Peoples R China

ISBN: (数字)9783662477915

ISBN: (纸本)9783662477915;9783662477908

Feature point matching is a key step of image registration, object recognition and many other computer vision applications. By using the proposed structural distance between feature point sets as the matching similarity, we are able to match the spatial structures of feature points in different images. In the optimization process of the structural distance, both local and global relationship are considered, which greatly improves the robustness and accuracy. We also present a fast algorithm with higher efficiency, which approximately realizes this method by linear matrix multiplication operations. The proposed method achieve promising matching results in the experiments.

关键词： Structural distance Feature point matching iterative algorithm

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