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Minimum Time Extrema Estimation for Large-Scale Radio-Frequency Identification Systems

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Journal of Computer Science & Technology 2020年第5期35卷 1099-1114页

作者： xiao-Jun Zhu Li-Jie Xu xiao-bing Wu bing Chen College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China Jiangsu Key Laboratory of Dig Data Security and Intelligent Processing Nanjing University of Posts and TelecommunicationsNanjing 210049China Wireless Research Centre University of CanterburyChristchurch 8041New Zealand

We consider the extrema estimation problem in large-scale radio-frequency identification(RFID)systems,where there are thousands of tags and each tag contains a finite *** objective is to design an extrema estimation protocol with the minimum execution *** the standard binary search protocol wastes much time due to inter-frame overhead,we propose a parameterized protocol and treat the number of slots in a frame as an unknown *** formulate the problem and show how to find the best parameter to minimize the worst-case execution ***,we propose two rules to further reduce the execution *** first is to find and remove redundant *** second is to concatenate a frame from minimum value estimation with a frame from maximum value estimation to reduce the total number of *** show that,in a typical scenario,the proposed protocol reduces execution time by 79%compared with the standard binary search protocol.

关键词： radio-frequency identification(RFID)system maximum value estimation minimum value estimation time efficient protocol

Asymmetric Catalytic Polymerization: Advances and Challenges

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Chinese Journal of Polymer Science 2023年第1期41卷 1-2页

作者： xiao-bing Lu State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart MaterialsDalian University of Technology

Most naturally occurring biomacromolecules are optically active owing to their unique chiral structural units and/or helical *** of them show specific functionalities,such as supersensitive responses to external stimuli,highly selective recognition abilities,superior mechanical properties,and excellent catalytic activity under extremely mild *** functionalities result from the unique chiral structural units and orderly arrangement of building blocks in the main-chain backbones of these biological macromolecules,such as enzymes,genes,and ***,the sequence and stereochemistry of the repeating units in a polymeric chain also have significant influence on their material ***,construction of functional polymers with precise control of chirality and sequence,similar to those in living systems,is of great significance.

关键词： precise Catalytic bones

Numerical research on adverse effect of muzzle flow formed by muzzle brake considering secondary combustion

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Defence Technology（防务技术） 2021年第4期17卷 1178-1189页

作者： Peng-fei Li xiao-bing Zhang School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjing210094PR China

The simulation of the artillery interior and intermediate ballistics problem is performed to investigate the influence of a gas dynamics device,muzzle brake,on the muzzle hazard phenomena,such as flash and blast *** correlation of the chemical reactions with the characteristics of the muzzle flow field is analyzed by the simulation for a further understanding of the secondary combustion phenomenon of the muzzle *** novel structure of muzzle flow caused by the muzzle brake is presented by the simultaneous solution of the interior ballistics model and multi-species Navier-Stokes equations in order to analyze the influence of the muzzle brake structure on the chemical *** secondary combustion of the muzzle flow due to the oxygen-supplement chemical reactions is obtained by the chemical reaction kinetic *** interaction of the blast waves released from the muzzle brake is illustrated in detail and the mechanism of the formation of muzzle flash is *** research provides a reference for the studies on the suppression of the muzzle flash.

关键词： Muzzle flow Muzzle brake Secondary combustion Chemical reaction

Partners in Epoxide Copolymerization Catalysis:Approach to High Activity and Selectivity

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Chinese Journal of Polymer Science 2022年第11期40卷 1331-1348页

作者： xiao-bing Lu Bai-Hao Ren State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116024China

The ring-opening alternating copolymerization processes of epoxides with small-molecule monomers,such as carbon dioxide(CO_(2)),carbonyl sulfide(COS)and cyclic anhydrides,are powerful strategies for preparing polymeric materials with degradable carbonate/ester/thiocarbonate main-chain backbone *** catalysts selected for copolymerization processes play crucial roles in determining their reaction rates and productivities,as well as the selectivity,regio-and stereochemistry,compositions,and the molecular weights of their resultant *** processes often generate undesirable byproducts such as polyether or ether linkages dispersed randomly within the copolymer's chain,and/or more thermodynamically stable cyclic *** this account,we outline our efforts of over a dozen years on developing highly active well-defined metal catalysts based on inter-and intra-molecular synergistic strategies to selectively produce completely alternating copolymers from epoxides and various small-molecule *** attention was paid to the enantioselective resolution copolymerization processes of racemic epoxides via regioselective ring-openings,and the asymmetric copolymerization processes of meso-epoxides with CO_(2),COS,or cyclic anhydrides via dissymmetrical ring-openings using multichiral catalytic systems,and affording isotactic copolymers with main-chain *** addition,this account provides a thorough mechanistic understanding of the high reactivities,excellent selectivity,and unprecedented stereochemical controls of these copolymerization systems,mediated by interand intramolecular synergistic catalysis.

关键词： Epoxide Ring-opening copolymerization Synergistic catalysis CO_(2) Stereochemistry control

PD-like finite time controller with simple structure for satellite attitude control

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Defence Technology（防务技术） 2023年第8期26卷 123-133页

作者： Li You Ye Dong xiao bing Xidian University Xi'an710126China Harbin Institute of Technology Harbin 150090China Northwestern Polytechnical University Xi'an710072China

A finite time controller with PD-like structure for satellite attitude control is proposed in this *** controller is constructed with simple structure based on standard PD *** fractional order term is designed hence system could both have strong robustness and finite time convergence rate,and the advantage of finite time control and PD control is combined in this *** convergence rate is discussed by Lyapunov method,and the constraint on control parameters is given by implementing the coupled term of angular velocity and attitude ***,the accuracy at steady stage depending on control parameters is given hence system could converge to this field within finite *** stability and performance is demonstrated by numerical simulation results.

关键词： Finite time control PD-like Simple structure Attitude control

Finding Key Node Sets in Complex Networks Based on Improved Discrete Fireworks Algorithm

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Journal of Systems Science & Complexity 2021年第3期34卷 1014-1027页

作者： LIU Fengzeng xiao bing LI Hao Air Force Early-Warning Academy Wuhan 430019China Academy of Information and Communication National University of Defense TechnologyWuhan 430010China

Finding out the key node sets that affect network robustness has great practical significance for network protection and network *** this paper,the problem of finding key node sets in complex networks is defined *** it is an NP-hard combinatorial optimization problem,discrete fireworks algorithm is introduced to search the optimal solution,which is a swarm intelligence algorithm and is improved by the prior information of *** verify the effect of improved discrete fireworks algorithm(IDFA),experiments are carried out on various model networks and real power *** show that the proposed IDFA is obviously superior to the benchmark algorithms,and networks suffer more damage when the key node sets obtained by IDFA are removed from the *** key node sets found by IDFA contain a large number of non-central nodes,which provides the authors a new perspective that the seemingly insignificant nodes may also have an important impact on the robustness of the network.

关键词： Complex networks discrete fireworks algorithm key node sets network robustness node centrality

Design optimization for a launching system with novel structure

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Defence Technology（防务技术） 2019年第5期15卷 680-689页

作者： Run-duo Cao xiao-bing Zhang School of Energy and Power Engineering Nanjing University of Science and Technology

A launching system with novel structure using optimization method is investigated to improve the muzzle velocity of guns in this *** system has two tandem chambers of which the front one is ignited first and the other is ignited after a *** launching process of this novel system is modelled and a series of different schemes are simulated,to discover the interior ballistic performance of this novel launching *** order to obtain the optimal loading conditions,an optimization model combined with the combustion model is *** optimal schemes can improve the muzzle velocity by 20.6%without changing the parameters of *** means that this novel launch system could improve the interior ballistics performance significantly and it still has considerable potential to be ameliorated.

关键词： Interior ballistics Mobile chamber Design optimization

Scientific footprints: In memory of crocodile expert,Professor Bi-Hui Chen(1931–2022)

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Zoological Research 2022年第6期43卷 923-926页

作者： xiao-bing Wu Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources College of Life SciencesAnhui Normal UniversityWuhuAnhui 241000China

At 10:00 am on 28 August 2022,we received the sad news that our beloved supervisor,Professor Bi-Hui Chen(陈壁辉),a world-renowned expert on the Chinese alligator(Alligator sinensis),passed away from multiple organ failure at the age of 91(Figure 1).Professor Bi-Hui Chen was born in September 1931 in Pinghe County,Fujian Province,China.

关键词： sinensis Figure expert

Repair cell first,then regenerate the tissues and organs

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Military Medical Research 2021年第4期8卷 579-580页

作者： xiao-bing Fu Wound Healing Unit Medical Innovation Department and the Fourth Medical CenterChinese PLA General Hospital and PLA Medical CollegeBeijing 100853China

Wound healing,tissue repair and regenerative medicine are in great demand,and great achievements in these fields have been *** traditional strategy of tissue repair and regeneration has focused on the level of tissues and organs directly;however,the basic process of repair at the cell level is often *** the cell is the basic unit of organism structure and function;cell damage is caused first by ischemia or ischemia-reperfusion after severe trauma and ***,damage to tissues and organs occurs with massive cell damage,apoptosis and even cell ***,how to achieve the aim of perfect repair and regeneration?The basic process of tissue or organ repair and regeneration should involve repair of cells first,then tissues and *** this manuscript,it is my consideration about how to repair the cell first,then regenerate the tissues and organs.

关键词： Cell repair Tissue repair Regenerative medicine Tissue engineering