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Low Complexity Successive Cancellation List Decoding of U-UV Codes

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China Communications 2025年第1期22卷 41-60页

作者： Chen Wenhao Chen Li Lin Jingyu Zhang Huazi School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China guangdong Province Key Laboratory of Information Security Technology Guangzhou 510006China Hangzhou Research Center Huawei Technologies Co.Ltd.Hangzhou 310052China

Constituted by BCH component codes and its ordered statistics decoding(OSD),the successive cancellation list(SCL)decoding of U-UV structural codes can provide competent error-correction performance in the short-to-medium length ***,this list decoding complexity becomes formidable as the decoding output list size *** is primarily incurred by the *** this challenge,this paper proposes the low complexity SCL decoding through reducing the complexity of component code decoding,and pruning the redundant SCL decoding *** the former,an efficient skipping rule is introduced for the OSD so that the higher order decoding can be skipped when they are not possible to provide a more likely codeword *** is further extended to the OSD variant,the box-andmatch algorithm(BMA),in facilitating the component code ***,through estimating the correlation distance lower bounds(CDLBs)of the component code decoding outputs,a path pruning(PP)-SCL decoding is proposed to further facilitate the decoding of U-UV *** particular,its integration with the improved OSD and BMA is *** results show that significant complexity reduction can be ***,the U-UV codes can outperform the cyclic redundancy check(CRC)-polar codes with a similar decoding complexity.

关键词： ordered statistics decoding successive cancellation list decoding U-UV codes

Locally Enhanced Flow and Electric Fields Through a Tip Effect for Efficient Flow‑Electrode Capacitive Deionization

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Nano-Micro Letters 2025年第2期17卷 1-17页

作者： Ziquan Wang Xiangfeng Chen Yuan Zhang Jie Ma Zhiqun Lin Amor Abdelkader Maria‑Magdalena Titirici Libo Deng College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Research Center for Environmental Functional Materials College of Environmental Science and EngineeringTongji University1239 Siping RoadShanghai 200092People’s Republic of China Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585Singapore Department of Engineering Faculty of Science and TechnologyBournemouth UniversityTalbot CampusFern BarrowPooleEngland BH125BBUK Institut de Chimie de Nice UniversitéCôte d’AzurUMR CNRS 727228 Av.Valrose06108 NiceFrance Department of Chemical Engineering Imperial College LondonSouth Kensington CampusExhibition RdLondon SW72AZUK

Low-electrode capacitive deionization(FCDI)is an emerging desalination technology with great potential for removal and/or recycling ions from a range of ***,it still suffers from inefficient charge transfer and ion transport kinetics due to weak turbulence and low electric intensity in flow electrodes,both restricted by the current ***,a new tip-array current collector(designated as T-CC)was developed to replace the conventional planar current collectors,which intensifies both the charge transfer and ion transport *** effects of tip arrays on flow and electric fields were studied by both computational simulations and electrochemical impedance spectroscopy,which revealed the reduction of ion transport barrier,charge transport barrier and internal *** the voltage increased from 1.0 to 1.5 and 2.0 V,the T-CC-based FCDI system(T-FCDI)exhibited average salt removal rates(ASRR)of 0.18,0.50,and 0.89μmol cm^(-2) min^(-1),respectively,which are 1.82,2.65,and 2.48 folds higher than that of the conventional serpentine current collectors,and 1.48,1.67,and 1.49 folds higher than that of the planar current ***,with the solid content in flow electrodes increased from 1 to 5 wt%,the ASRR for T-FCDI increased from 0.29 to 0.50μmol cm^(-2) min^(-1),which are 1.70 and 1.67 folds higher than that of the planar current ***,a salt removal efficiency of 99.89%was achieved with T-FCDI and the charge efficiency remained above 95%after 24 h of operation,thus showing its superior long-term stability.

关键词： Flow-electrode Capacitive deionization Current collector Tip effect Desalination

Achievable Rate Analysis and Optimization of Double-RIS Assisted Spatially Correlated MIMO with Statistical CSI

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China Communications 2025年第1期22卷 139-157页

作者： Xu Kaizhe Guo Jiajia Zhang Jun Jin Shi Ma Shaodan Department of Communications and Networking Xi’an Jiaotong-Liverpool UniversitySuzhou 215123China State Key Laboratory of Internet of Things for Smart City University of MacaoMacao SARChina Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and TelecommunicationsNanjing 210003China National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China State Key Laboratory of Internet of Things for Smart City and the Department of Electrical and Computer Engineering University of MacaoMacao SARChina

Reconfigurable intelligent surface(RIS)is a novel meta-material which can form a smart radio environment by dynamically altering reflection directions of the impinging electromagnetic *** the prior literature,the inter-RIS links which also contribute to the performance of the whole system are usually neglected when multiple RISs are *** this paper we investigate a general double-RIS assisted multiple-input multiple-output(MIMO)wireless communication system under spatially correlated non line-of-sight propagation channels,where the cooperation of the double RISs is also *** design objective is to maximize the achievable ergodic rate based on full statistical channel state information(CSI).Specifically,we firstly present a closedform asymptotic expression for the achievable ergodic rate by utilizing replica method from statistical *** a full statistical CSI-enabled optimal design is proposed which avoids high pilot training overhead compared to instantaneous CSI-enabled *** further reduce the signal processing overhead and lower the complexity for practical realization,a common-phase scheme is proposed to design the double *** results show that the derived asymptotic ergodic rate is quite accurate even for small-sized antenna *** the proposed optimization algorithm can achieve substantial gain at the expense of a low overhead and ***,the cooperative double-RIS assisted MIMO framework is proven to achieve superior ergodic rate performance and high communication reliability under harsh propagation environment.

关键词： common reflection pattern double RISs large system analysis MIMO replica method

Field emission from single-crystalline CeB_6 nanowires

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Journal of Rare Earths 2010年第3期28卷 424-427页

作者：赵彦明欧阳柳生邹春云许军旗董有忠范庆华 School of Physics South China University of Technology

We presented a field electron emission measurement of single crystalline CeB6 *** nanowires exhibited a low turn-on electric field(7.6 V/μm at 10 μA/cm2),and the deviation of Fowler-Nordheim(F-N) plots from straight line was observed in field electron emission *** field enhancement factors were obtained by separate straight line *** nonlinearity in the F-N plots may be attributed to the non-uniform field electron emission of CeB6 *** field emission properties of the ...

关键词： CeB6 nanowires field emission rare earths

ON CRITICAL SINGULAR QUASILINEAR ELLIPTIC PROBLEM WHEN n=p

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Acta Mathematica Scientia 2006年第2期26卷 209-219页

作者：姚仰新沈尧天 School of Mathematical Sciences South China University of Technology Guangzhou 510640China

This article deals with the problem-△pu=λ｜u｜p/-2｜x｜pIn^p R/｜x｜＋f（x,u）,x∈Ω;u=0,x∈δΩ,where n = p. The authors prove that a Hardy inequality and the constant （p/p-1）^p is optimal. They also prove the ex... 详细信息

关键词： Elliptic equation Hardy inequality critical singularity Mountain PassLemma

NONTRIVIAL SOLUTION FOR A CLASS OF SEMILINEAR BIHARMONIC EQUATION INVOLVING CRITICAL EXPONENTS

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Acta Mathematica Scientia 2007年第3期27卷 509-514页

作者：姚仰新王荣鑫沈尧天 School of Mathematical Sciences South China University of Technology

In this article, the authors prove the existence and the nonexistence of nontrivial solutions for a semilinear biharmonic equation involving critical exponent by virtue of Mountain Pass Lemma and Sobolev-Hardy inequal... 详细信息

关键词： Biharmonic equation critical exponent singular term nontrivial solution,Sobolev-Hardy inequality

EXISTENCE OF INFINITELY MANY SOLUTIONS FOR ELLIPTIC PROBLEMS WITH CRITICAL EXPONENT

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Acta Mathematica Scientia 2004年第3期24卷 395-402页

作者：傅红卓沈尧天 Department of Mathematics South China University of Technology Guangzhou 510640 China Department of Mathematics University of Science and Technology of China Hefei 230026 China Department of Mathematics South China University of Technology Guangzhou 510640 Chinahis paper is concerned with the following nonlinear Dirichlet problem:where △pu = div(| ▽u|p- 2 ▽u) is the p-Laplacian of u Ωis a bounded domain in Rn (n > 3) 1 < p < n p = -pn/n-p is the critical exponent for the Sobolev imbedding λ> 0 and f(x u) satisfies some conditions. It reaches the conclusion that this problem has infinitely many solutions. Some results as p = 2 or f(xu) = |u|q-2u where 1 < q < p are generalized.

This paper is concerned with the following nonlinear Dirichlet problem:where △pu = div(| ▽u|p- 2 ▽u) is the p-Laplacian of u, Ω is a bounded domain in Rn (n > 3), 1 0 and f(x, u) satisfies some conditions. It reaches the conclusion that this problem has infinitely many solutions. Some results as p = 2 or f(x,u) = |u|q-2u, where 1 < q < p, are generalized.

关键词： critical Sobolev exponent concentration compactness principle genus infinitely many solutions

Extended observer-based consensus tracking control for MASs with external disturbance and dynamic event-triggered strategy

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Science China Technological Sciences 2025年第3期68卷 232-242页

作者： Jian LIAO Kai MAO Bin XIN Jing HE Yaoqing ZHANG Jun CHENG Delin LUO Shaolei ZHOU College of Physics and Electronic Information Gannan Normal University Shenzhen Institute of Advanced Technology Chinese Academy of Sciences College of Basic Science Naval Aviation University School of Automation Beijing Institute of Technology School of Aerospace Engineering Xiamen University

This article explores the leader-following consensus tracking(LFCK) control issues of multi-agent systems(MASs)in the presence of external disturbances and general directed fixed communication topology. Its purpose is to enable all follower agents to achieve consensus tracking for the leader agent. Firstly, this article introduces an extended state observer for estimating each follower agent's unknown state and external disturbance. Subsequently, on the basis of the above-extended state observer and a dynamic event-triggered strategy, a distributed consensus tracking control protocol with disturbances restraint is developed,which can reduce the MAS's update frequency on the premise of ensuring the control protocol's effectiveness. Furthermore,the MAS's stability and the absence of Zeno behavior are analyzed and proved by the established Lyapunov functional and linear matrix inequality theory. Finally, the validity and feasibility of the proposed approach are validated through a group of comparative numerical simulation experiments.

关键词： leader-following consensus tracking (LFCK) dynamic event-triggered strategy external disturbances state observer multi-agent systems

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ALL MEROMORPHIC SOLUTIONS OF AN AUXILIARY ORDINARY DIFFERENTIAL EQUATION AND ITS APPLICATIONS

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Acta Mathematica Scientia 2015年第5期35卷 1241-1250页

作者：袁文俊熊维玲林剑鸣吴永洪 School of Mathematics and Information Science Guangzhou University Key Laboratory of Mathematics and Interdisciplinary Sciences of guangdong Higher Education Institutes Guangzhou University Department of Information and Computing Science Guangxi University of Technology School of Economic and Management Guangzhou University of Chinese Medicine Department of Mathematics and Statistics Curtin University of Technology

In this paper, we first employ the complex method to deritive all meromorphic solutions of an auxiliary ordinary differential equation, and then find all meromorphic exact solutions of the modified ZK equation, modified KdV equation, nonlinear Klein-Gordon equation and modified BBM equation. Our work shows that there exist some classes of rational solutions wr,2 （z） and simple periodic solutions ws,1 （z） which are new and are not degenerated successively to by the elliptic function solutions.

关键词： differential equation exact solution meromorphic function elliptic function