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Integrating Conjugate Gradients Into Evolutionary Algorithms for Large-Scale Continuous Multi-Objective Optimization

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IEEE/CAA Journal of Automatica Sinica 2022年第10期9卷 1801-1817页

作者： Ye Tian Haowen chen Haiping Ma Xingyi zhang Kay chen Tan Yaochu Jin the information Materials and intelligent Sensing laboratory of Anhui Province Institutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China the Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefei 230601China IEEE the key laboratory of intelligent Computing and Signal Processing of Ministry of Education School of Artificial IntelligenceAnhui UniversityHefei 230601China the department of Computing The Hong Kong Polytechnic UniversityHong Kong SARChina the Faculty of technology Bielefeld UniversityBielefeld 33619Germany

Large-scale multi-objective optimization problems(LSMOPs)pose challenges to existing optimizers since a set of well-converged and diverse solutions should be found in huge search *** evolutionary algorithms are good at solving small-scale multi-objective optimization problems,they are criticized for low efficiency in converging to the optimums of *** contrast,mathematical programming methods offer fast convergence speed on large-scale single-objective optimization problems,but they have difficulties in finding diverse solutions for ***,how to integrate evolutionary algorithms with mathematical programming methods to solve LSMOPs remains *** this paper,a hybrid algorithm is tailored for LSMOPs by coupling differential evolution and a conjugate gradient *** the one hand,conjugate gradients and differential evolution are used to update different decision variables of a set of solutions,where the former drives the solutions to quickly converge towards the Pareto front and the latter promotes the diversity of the solutions to cover the whole Pareto *** the other hand,objective decomposition strategy of evolutionary multi-objective optimization is used to differentiate the conjugate gradients of solutions,and the line search strategy of mathematical programming is used to ensure the higher quality of each offspring than its *** comparison with state-of-the-art evolutionary algorithms,mathematical programming methods,and hybrid algorithms,the proposed algorithm exhibits better convergence and diversity performance on a variety of benchmark and real-world LSMOPs.

关键词： Conjugate gradient differential evolution evolutionary computation large-scale multi-objective optimization mathematical programming

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基于非完美信道信息的协作NOMA系统中保密通信技术研究

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电子科技大学学报 2020年第5期49卷 674-679页

作者：陈杨张忠培李彬睿电子科技大学通信抗干扰技术国家级重点实验室成都611731

该文针对协作NOMA系统中保密通信进行了研究,在该NOMA系统中,一个有高保密需求的用户(LU1)被多个非合作窃听者窃听,另一个普通用户(LU2)同时与基站(Alice)进行通信。为了提高系统的安全性能,在系统中引入了一个协作干扰者(Charlie)来扰... 详细信息

该文针对协作NOMA系统中保密通信进行了研究,在该NOMA系统中,一个有高保密需求的用户(LU1)被多个非合作窃听者窃听,另一个普通用户(LU2)同时与基站(Alice)进行通信。为了提高系统的安全性能,在系统中引入了一个协作干扰者(Charlie)来扰乱窃听者。考虑更加贴近实际场景的非完美信道信息情况,基于LU1的保密需求和LU2的QoS要求,提出了一个自适应功率分配算法来解决安全速率最大化问题。仿真结果验证了该方案的有效性和灵活性,并且验证了非完美信道信息会降低系统安全性能以及能效。

关键词：非完美信道信息非正交多址接入功率分配保密中断概率保密速率

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High-throughput Binary Vectors for Plant Gene Function Analysis

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Journal of Integrative Plant Biology 2007年第4期49卷 556-567页

作者： Zhi-Yong Lei Ping Zhao Min-Jie Cao Rong Cui Xi chen Li-zhong Xiong Qi-Fa zhang David J. Oliver cheng-Bin Xiang School of Life sciences University of Science and Technology of China Hefei 230027 China state key laboratory of Crop Genetic Improvement Huazhong Agricultural University Wuhan 430070 China department of Genetics Development and Cell Biology Iowa State University Ames IA 50011 USA

A series of high-throughput binary cloning vectors were constructed to facilitate gene function analysis in higher plants. This vector series consists of plasmids designed for plant expression, promoter analysis, gene silencing, and green fluorescent protein fusions for protein localization. These vectors provide for high-throughput and efficient cloning utilizing sites for λ phage integrase/excisionase. In addition, unique restriction sites are incorporated in a multiple cloning site and enable promoter replacement. The entire vector series are available with complete sequence information and detailed annotations and are freely distributed to the scientific community for non-commercial uses.

关键词： binary vectors gene silencing green fluorescent protein fusion high-throughput promoter analysis recombinationassisted cloning.

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Graded composition and doping p-i-n Al_(x)Ga_(1−x)As/GaAs detector for unbiased voltage operation

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Nuclear science and Techniques 2022年第7期33卷 73-82页

作者： Zhi-Fu Zhu Ji-Jun Zou Zhi-Jia Sun He Huang Qing-Lei Xiu zhong-Ming zhang Yong Gan chen-Xian Guo Shao-Tang Wang Xiu-Ping Yue Guo-Li Kong School of information Engineering Zhengzhou University of TechnologyZhengzhou450044China Engineering Research Center of Nuclear technology Application(East china university of technology) Ministry of EducationNanchang330013China state key laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China Engineering department LA14YWLancaster UniversityLancasterUK

p-i-n Al_(x)Ga_(1−x)As/GaAs detectors with graded compositions and graded doping were grown and *** the current-voltage and capacitance-voltage measurement results,the devices had good p-n junction diode characteristics,and the electric field strength under an unbiased voltage was 1.7×10^(5) Vcm^(-1).The full width at half maximum and charge collection efficiency of the detectors obtained from energy spectrum measurements of 5.48-MeV alpha particles were 3.04 and approximately 93%,*** this study,we created the most advanced and promising state-of-the-art unbiased detector reported to date.

关键词： Graded composition Graded doping Detector p-i-n Al_(x)Ga_(1−x)As/GaAs

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Iteration framework for solving mixed lubrication computation problems

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Frontiers of Mechanical Engineering 2021年第3期16卷 635-648页

作者： Shi chen Nian YIN Zhinan zhang Xiaojiang CAI state key laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Aerospace Control technology Institute Shanghai 201109China Shanghai key laboratory of Aerospace intelligent Control technology Shanghai 201109China

The general discrete scheme of time-varying Reynolds equation loses the information of the previous step,which makes it unreasonable.A discretization formula of the Reynolds equation,which is based on the Crank-Nicolson method,is proposed considering the physical message of the previous ***-Seidel relaxation and distribution relaxation are adopted for the linear operators of pressure during the numerical solution *** addition to the convergent criteria of pressure distribution and load,an estimation framework is developed to investigate the relative error of the most important term in the Reynolds *** surface with frill contacts and mixed elastohydrodynamic lubrication is tested for *** asperity contact and sinusoidal wavy surface are examined by the proposed discrete *** show the precipitous decline in the boundary of the contact *** relative error suggests that the pressure distribution is reliable and reflects the accuracy and effectiveness of the developed method.

关键词： mixed lubrication discretization formula relative error Reynolds equation asperity

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Wireless Powered IoE for 6G: Massive Access Meets Scalable Cell-Free Massive MIMO

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china Communications 2020年第12期17卷 92-109页

作者： Shuaifei chen Jiayi zhang Yu Jin Bo Ai School of Electronic and information Engineering Beijing Jiaotong UniversityBeijing 100044China state key laboratory of Rail Traffic Control and Safety Beijing Jiaotong UniversityBeijing 100044China Henan Joint International Research laboratory of intelligent Networking and Data Analysis Zhengzhou UniversityZhengzhou 450001China

A key challenge to the scalable deployment of the energy self-sustainability(ESS)Internet of Everything(IoE)for sixth-generation(6G)networks is juggling massive connectivity and high spectral efficiency(SE).Cell-free massive multiple-input multiple-output(CF mMIMO)is considered as a promising solution,where many wireless access points perform coherent signal processing to jointly serve the ***,massive connectivity and high SE are difficult to obtain at the same time because of the limited pilot *** solve this problem,we propose a new framework for ESS IoE networks where the user activity detection(UAD)and channel estimation are decoupled.A UAD detector based on deep convolutional neural networks,an initial access scheme,and a scalable power control policy are proposed to enable the practical scalable CF mMIMO *** derive novel and exact closed-form expressions of harvested energy and SE with maximum ratio(MR)*** local partial minimum mean-square error and MR combining,simulation results prove that the proposed framework can serve more users,improve the SE performance,and achieve better user fairness for the considered ESS IoE networks.

关键词： 6G network cell-free massive MIMO energy self-sustainability Internet of Everything

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A Text Sentiment Classification Modeling Method Based on Coordinated CNN-LSTM-Attention Model

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Chinese Journal of Electronics 2019年第1期28卷 120-126页

作者： zhang yangsen ZHENG Jia JIANG Yuru HUANG Gaijuan chen Ruoyu Institute of intelligent information Processing Beijing Information Science and Technology University beijing laboratory of national Economic Security Early-Warning Engineering

The major challenge that text sentiment classification modeling faces is how to capture the intrinsic semantic, emotional dependence information and the key part of the emotional expression of text. To solve this problem, we proposed a Coordinated CNNLSTM-Attention(CCLA) model. We learned the vector representations of sentence with CCLA unit. Semantic and emotional information of sentences and their relations are adaptively encoded to vector representations of *** used softmax regression classifier to identify the sentiment tendencies in the text. Compared with other methods, the CCLA model can well capture the local and long distance semantic and emotional *** results demonstrated the effectiveness of CCLA model. It shows superior performances over several state-of-the-art baseline methods.

关键词： Coordinated CNN-LSTM-Attention Sentiment analysis Text modeling Semantic information

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Physics perspectives of heavy-ion collisions at very high energy

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science china(Physics,Mechanics & Astronomy) 2016年第2期59卷 1-27页

作者： Ning-bo Chang ShanShan Cao Bao-yi chen Shi-yong chen Zhen-yu chen Heng-Tong Ding Min He Zhi-quan Liu Long-gang Pang Guang-you Qin Ralf Rapp Bjorn Schenke Chun Shen HuiChao Song Hao-jie Xu Qun Wang Xin-Nian Wang Ben-wei zhang Han-zhong zhang XiangRong Zhu Peng-fei Zhuang key laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics Central China Normal University Wuhan 430079 China Nuclear science Division MS70R0319 Lawrence Berkeley National Laboratory Berkeley 94720 USA Physics department Tsinghua University Beijing 100084 China department of Applied Physics Nanjing University of Science and Technology Nanjing 210094 China Cyclotron Institute and department of Physics and Astronomy Texas A&M University College Station TX 77843 USA Physics department Brookhaven National Laboratory Upton New York 11973 USA department of Physics McGill University Montreal Quebec H3A 2T8 Canada department of Physics and state key laboratory of Nuclear Physics and technology Peking University Beijing 100871 China department of Modern Physics University of Science and Technology of China Hefei 230026 China

Heavy-ion collisions at very high colliding energies are expected to produce a quark-gluon plasma(QGP) at the highest temperature obtainable in a laboratory setting. Experimental studies of these reactions can provide an unprecedented range of information on properties of the QGP at high temperatures. We report theoretical investigations of the physics perspectives of heavy-ion collisions at a future high-energy collider. These include initial parton production, collective expansion of the dense medium, jet quenching,heavy-quark transport, dissociation and regeneration of quarkonia, photon and dilepton production. We illustrate the potential of future experimental studies of the initial particle production and formation of QGP at the highest temperature to provide constraints on properties of strongly interaction matter.

关键词： quark-gluon plasma heavy-ion collisions QCD phase transition properties of QGP

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Phosphonium-Based Ionic Thermally Activated Delayed Fluorescence Emitters for High-Performance Partially Solution-Processed Organic Light-Emitting Diodes

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CCS Chemistry 2023年第3期5卷 589-597页

作者： Xu-Lin chen Xiao-Dong Tao Ya-Shu Wang Zhuangzhuang Wei Lingyi Meng Dong-Hai zhang Fu-Lin Lin Can-zhong Lu state key laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002 Xiamen key laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamenFujian 361021 Fujian science&technology Innovation laboratory for Optoelectronic information of china FuzhouFujian 350108

Ionic thermally activated delayed fluorescence(TADF)emitters are rarely investigated due to their poor photoluminescence and electroluminescence ***,highly efficient ionic TADF emitters with charged donor–acceptor(D–A^(+))and D–A^(+)–D architectures are designed,innovatively based on the phosphonium cation electron *** symmetric D–A^(+)–D compound in doped film exhibits a high photoluminescence quantum yield of 0.91 and a short emission lifetime of 1.43 *** solution-processed organic lightemitting diodes based on these ionic TADF emitters achieve a maximum external quantum efficiency(EQE)of 18.3%and a peak luminance of 14,532 candelas per square meter(cd/m^(2))and show a small efficiency roll-off of 7.1%(EQE=17%)at a practical high luminance of 1000 cd/m^(2).These results demonstrate the high potential of phosphonium cations as promising electron acceptors to construct TADF emitters for high-performance electroluminescence *** current study opens up an appealing way for future exploitation of high-efficiency ionic TADF materials.

关键词： cation acceptor charge transfer phosphonium ionic emitter thermally activated delayed fluorescence partially solution-processed host-guest organic light-emitting diode efficiency roll-off

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A geographic routing protocol based on trunk line in VANETs

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Digital Communications and Networks 2021年第4期7卷 479-491页

作者： chen chen Huan Li Xi’ang Li Jianlong zhang Hong Wei Hao Wang state key laboratory of Integrated Services Networks Xidian UniversityXi’an710071China key laboratory of Industrial Internet of Things&Networked ControlMinistry of Education Chongqing400065China Shanxi key laboratory of Integrate and intelligent Navigation Xi’an710071China china Highway Engineering Consulting Group Co.LTD. Beijing101400China Xi’an United Ride intelligent technology Co.LTD. Xi’an710071China

A Trunk Line Based Geographic Routing(TLBGR)protocol in Vehicular Ad-hoc Networks(VANETs)is proposed in this paper to solve the problem of data acquisition in the traditional trunk coordinated control *** of the characteristics of short communication time and high packet loss among vehicles,the vehicles entering the trunk lines can not transmit their information to the trunk coordinated control system *** resolve this problem,the proposed protocol uses the trunk lines’traffic flow and the surrounding road network to provide a real-time data transmission routing *** takes into account the data congestion problem caused by the large traffic flow of the main roads,which leads to the corresponding increase of the information flow of the section and the package loss,and the link partition problem caused by the insufficient traffic flow,which makes the vehicles have to carry and relay information thus increasing the transmission *** proposed TLBGR protocol can be divided into two stages:the next-intersection selection,and the next-hop selection in the chosen path between the current and next *** results show that,compared with other IoT routing protocols including Greedy Perimeter stateless Routing(GPSR),Ad-hoc On Demand Vector(AODV),and Q-AODV,the TLBGR protocol has better performance in aspects of end-to-end delay,delivery rate,and routing cost under the scenario of urban traffic trunk *** TLBGR protocol can effectively avoid data congestion and local optimum problems,increase the delivery rate of data packets,and is therefore suitable for the routing requirements in this application scenario.

关键词： VANETs AHP Data transmission routing scheme volume

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