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一种求解高维优化问题的改进灰狼算法

系统工程学报 2024年第2期39卷 200-216页

作者：李煜林笑笑刘景森河南大学管理科学与工程研究所河南开封475004 河南大学商学院河南开封475004 河南大学智能网络系统研究所河南开封475004

为求解高维优化问题,提出基于反向学习和衰减因子的灰狼优化算法(grey wolf algorithm based on opposition learning and reduction factor,ORGWO).设计一种灰狼反向学习模型,模型考虑问题搜索边界信息和种群历史搜索信息,初始种群阶... 详细信息

为求解高维优化问题,提出基于反向学习和衰减因子的灰狼优化算法(grey wolf algorithm based on opposition learning and reduction factor,ORGWO).设计一种灰狼反向学习模型,模型考虑问题搜索边界信息和种群历史搜索信息,初始种群阶段增加反向学习,增强种群多样性.根据算法各个阶段不同特征引入衰减因子,平衡全局和局部勘探能力.选取8个高维函数和23个不同特征的优化函数对算法性能进行测试,进一步使用收敛性分析,寻优成功率,CPU时间,Wilcoxon秩和检验来评估改进算法,实验结果表明,ORGWO算法在求解高维问题上具有较好的精度,鲁棒性和更快的收敛速度.

关键词：灰狼优化算法反向学习衰减因子高维优化问题

Enhanced Butterfly Optimization Algorithm for Large-Scale Optimization Problems

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Journal of Bionic Engineering 2022年第2期19卷 554-570页

作者： Yu Li Xiaomei Yu jingsen liu Institute of Management Science and Engineering and School of BusinessHenan UniversityKaifeng 475004China School of Business Henan UniversityKaifeng 475004China Institute of Intelligent Network Systems and Software SchoolHenan UniversityKaifeng 475004China

To solve large-scale optimization problems,Fragrance coefficient and variant Particle Swarm local search Butterfly Optimization Algorithm(FPSBOA)is proposed.In the position update stage of Butterfly Optimization Algorithm(BOA),the fragrance coefficient is designed to balance the exploration and exploitation of BOA.The variant particle swarm local search strategy is proposed to improve the local search ability of the current optimal butterfly and prevent the algorithm from falling into local optimality.192000-dimensional functions and 201000-dimensional CEC 2010 large-scale functions are used to verify FPSBOA for complex large-scale optimization problems.The experimental results are statistically analyzed by Friedman test and Wilcoxon rank-sum test.All attained results demonstrated that FPSBOA can better solve more challenging scientific and industrial real-world problems with thousands of variables.Finally,four mechanical engineering problems and one ten-dimensional process synthesis and design problem are applied to FPSBOA,which shows FPSBOA has the feasibility and effectiveness in real-world application problems.

关键词： Butterfy optimization algorithm Fragrance coefcient Variant particle swarm local search Large-scale optimization problems Real-world application problems

政府奖惩机制下港口危化品物流监管的三方演化博弈研究

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工业工程 2024年第1期27卷 137-144,154页

作者：李煜王腾飞周欢刘景森河南大学商学院河南开封475004 河南大学管理科学与工程研究所河南开封475004 河南大学复杂智能网络系统研究所河南开封475004

为解决物流监管中企业向第三方专业机构寻租、政府监管缺失等问题,构建港口物流企业、第三方专业机构和港口行政管理部门的三方演化博弈模型,通过求解与数值仿真,揭示物流监管中演化均衡规律。研究表明,港口行政管理部门设定的奖惩机制... 详细信息

为解决物流监管中企业向第三方专业机构寻租、政府监管缺失等问题,构建港口物流企业、第三方专业机构和港口行政管理部门的三方演化博弈模型,通过求解与数值仿真,揭示物流监管中演化均衡规律。研究表明,港口行政管理部门设定的奖惩机制必须符合对各方的奖励与惩罚之和大于各自投机收益的条件,才能使策略组合(合规运营、拒绝寻租、宽松监管)成为演化稳定策略;增大奖励与惩罚力度均有利于企业合规运营和第三方专业机构拒绝寻租策略的实施,但港政部门的监管意愿随着奖励力度的增大而减小,且随着奖励力度的增大其效果减弱;提升企业的信誉收益,增加寻租成本及政府失职受到的问责也有助于促进企业向合规运营方向的演化。

关键词：港口危险化学品第三方专业机构寻租行为演化博弈仿真分析

Ultra-stable Pt_(5)La intermetallic compound towards highly efficient oxygen reduction reaction

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Nano Research 2023年第2期16卷 2035-2040页

作者： Siyuan Zhu Liting Yang jingsen Bai Yuyi Chu Jie liu Zhao Jin Changpeng liu Junjie Ge Wei Xing State Key Laboratory of Electroanalytical Chemistry Laboratory of Advanced Power SourcesChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaUniversity of Science and Technology of China(USTC)Hefei 230026China Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023China

Designing feasible electrocatalysts towards oxygen reduction reaction(ORR)requires advancement in both activity and stability,where attaining high stability is of extreme importance as the catalysts are expected to work efficiently under frequent start-up/shut down circumstances for at least several thousand hours.Alloying platinum with early transition metals(i.e.,Pt–La alloy)is revealed as efficient catalysts construction strategy to potentially satisfy these demands.Here we report a Pt5La intermetallic compound synthesized by a novel and facile strategy.Due to the strong electronic interactions between Pt and La,the resultant Pt5La alloy catalyst exhibits enhanced activity with half wave of 0.92 V and mass activity of 0.49 A·mgPt^(−1),which strictly follows the 4e transfer pathway.More importantly,the catalyst performs superior stability during 30,000 cycles of accelerated stressed test(AST)with mass activity retention of 93.9%.This study provides new opportunities for future applications of Pt-rare earth metal alloy with excellent electrocatalytic properties.

关键词： oxygen reduction reaction intermetallic compound rare earth metal electrocatalysis

Analysis of Additional Damping Control Strategy and Parameter Optimization for Improving Small Signal Stability of VSC-HVDC System

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Energy Engineering 2023年第4期120卷 931-948页

作者： Hui Fang jingsen Zhou Hanjie liu Yanxu Wang Hongji Xiang Yechun Xin State Grid Chongqing Electric Power Company Research Institute Chongqing401120China Northeast Electric Power University Jilin132000China

The voltage source converter based high voltage direct current(VSC-HVDC)system is based on voltage source converter,and its control system is more complex.Also affected by the fast control of power electronics,oscillation phenomenon in wide frequency domain may occur.To address the problem of small signal stability of the VSCHVDC system,a converter control strategy is designed to improve its small signal stability,and the risk of system oscillation is reduced by attaching a damping controller and optimizing the control parameters.Based on the modeling of the VSC-HVDC system,the general architecture of the inner and outer loop control of the VSCHVDC converter is established;and the damping controllers for DC control and AC control are designed in the phase-locked loop and the inner and outer loop control parts respectively;the state-space statemodel of the control system is established to analyze its performance.And the electromagnetic transient simulation model is built on the PSCAD/EMTDC simulation platform to verify the accuracy of the small signal model.The influence of the parameters of each control part on the stability of the system is summarized.The main control parts affecting stability are optimized for the phenomenon of oscillation due to changes in operation mode occurring on the AC side due to faults and other reasons,which effectively eliminates system oscillation and improves system small signal stability,providing a certain reference for engineering design.

关键词： VSC-HVDC system small signal modeling eigenvalue analysis parameter optimization

Intrinsic spin shielding effect in platinum-rare-earth alloy boosts oxygen reduction activity

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National Science Review 2023年第9期10卷 136-145页

作者： Siyuan Zhu Mingzi Sun Bingbao Mei Liting Yang Yuyi Chu Zhaoping Shi jingsen Bai Xian Wang Zheng Jiang Changpeng liu Bolong Huang Junjie Ge Wei Xing State Key Laboratory of Electroanalytical Chemistry Laboratory of Advanced Power Sources Changchun Institute of Applied Chemistry Chinese Academy of Sciences School of Applied Chemistry and Engineering University of Science and Technology of China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Shanghai Synchrotron Radiation Facility Zhangjiang National LaboratoryShanghai Advanced Research InstituteChinese Academy of Sciences Dalian National Laboratory for Clean Energy Chinese Academy of Sciences

Oxygen reduction reactions(ORRs) involve a multistep proton-coupled electron process accompanied by the conversion of the apodictic spin configuration.Understanding the role of spin configurations of metals in the adsorption and desorption of oxygen intermediates during ORRs is critical for the design of efficient ORR catalysts.Herein,a platinum-rare-earth-metal-based alloy catalyst,Pt2Gd,is introduced to reveal the role of spin configurations in the catalytic activity of materials.The catalyst exhibits a unique intrinsic spin reconfiguration because of interactions between the Gd-4f and Pt-5d orbitals.The adsorption and desorption of the oxygen species are optimized by modifying the spin symmetry and electronic structures of the material for increased ORR efficiency.The Pt2Gd alloy exhibits a half-wave potential of 0.95 V and a superior mass activity of 1.5 A·mgPt-1in a 0.1 M HClO4electrolyte,as well as higher durability than conventional Pt/C catalysts.Theoretical calculations have proven that the spin shielding effect of Gd pairs increases the spin symmetry of Pt-5d orbitals and adsorption preferences toward spin-polarized intermediates to facilitate ORR.This work clarifies the impact of modulating the intrinsic spin state of Pt through the interaction with the local high spin 4f orbital electrons in rare-earth metals,with the aim of boosting the spin-related oxygen reduction reaction,thus fundamentally contributing to the understanding of new descriptors that control ORR activity.

关键词： oxygen reduction reaction intermetallic compound spin effect rare-earth metal electrocatalysis

基于改进的樽海鞘群算法求解机器人路径规划问题

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计算机研究与发展 2022年第6期59卷 1297-1314页

作者：刘景森袁蒙蒙李煜河南大学智能网络系统研究所河南开封475004 河南大学软件学院河南开封475004 郑州科技学院信息工程学院郑州450052 河南大学管理科学与工程研究所河南开封475004

为了探索出更好解决机器人路径规划问题的方法,提出一种差异演化的寄生樽海鞘群算法.首先在领导者位置更新公式中加入对应的上一代领导者位置信息,加强全局搜索的充分性,同时引入自适应惯性权重,更好平衡领导者在不同进化阶段对于广度... 详细信息

为了探索出更好解决机器人路径规划问题的方法,提出一种差异演化的寄生樽海鞘群算法.首先在领导者位置更新公式中加入对应的上一代领导者位置信息,加强全局搜索的充分性,同时引入自适应惯性权重,更好平衡领导者在不同进化阶段对于广度和深度搜索的不同需求,提高寻优精度.然后在算法结构中引入具有不同演化策略和寄生行为机制的寄生-宿主双种群及宿主群劣汰思想,增加种群的多样性,提高算法跳出局部极值的能力.理论分析证明了改进算法的时间复杂度与基本算法相同,6种对比算法在10个不同特征的标准测试函数上进行仿真对比测试,实验结果表明:该算法的寻优精度、收敛性能均有显著提高和改善.最后将改进算法与三次埃尔米特插值相结合,以路径上的节点组合为基础定义算法中个体位置的编码方式,以绕开障碍、最短路径为目标构造了适应度函数和约束条件,求解机器人路径规划问题.在不同复杂程度的障碍物场景和不同插值方法下进行的算例求解结果显示,该算法寻优结果的最佳值、平均值和方差整体上明显优于其他5种性能优越的代表性对比算法,也验证了融合埃尔米特插值方法对于求解机器人路径规划问题的优越性和有效性.

关键词：樽海鞘群算法惯性权重双种群埃尔米特插值机器人路径规划

Genome-Wide Identification and Expression Profiling Suggest that Invertase Genes Function in Silique Development and the Response to Sclerotinia sclerotiorum in Brassica napus

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Phyton-International Journal of Experimental Botany 2020年第2期89卷 253-273页

作者： jingsen liu Jinqi Ma Ai Lin Chao Zhang Bo Yang Liyuan Zhang Lin Huang Jiana Li Chongqing Rapeseed Engineering Research Center College of Agronomy and BiotechnologyChongqing400715China Academy of Agricultural Sciences Southwest UniversityChongqing400715China

Invertase(INV),a key enzyme in sucrose metabolism,irreversibly catalyzes the hydrolysis of sucrose to glucose and fructose,thus playing important roles in plant growth,development,and biotic and abiotic stress responses.In this study,we identified 27 members of the BnaINV family in Brassica napus.We constructed a phylogenetic tree of the family and predicted the gene structures,conserved motifs,cis-acting elements in promoters,physicochemical properties of encoded proteins,and chromosomal distribution of the BnaINVs.We also analyzed the expression of the BnaINVs in different tissues and developmental stages in the B.napus cultivar Zhongshuang 11 using qRT-PCR.In addition,we analyzed RNA-sequencing data to explore the expression patterns of the BnaINVs in four cultivars with different harvest indices and in plants inoculated with the pathogenic fungus Sclerotinia sclerotiorum.We used WGCNA(weighted coexpression network analysis)to uncover BnaINV regulatory networks.Finally,we explored the expression patterns of several BnaINV genes in cultivars with long(Zhongshuang 4)and short(Ningyou 12)siliques.Our results suggest that BnaINVs play important roles in the growth and development of rapeseed siliques and the defense response against pathogens.Our findings could facilitate the breeding of high-yielding B.napus cultivars with strong disease resistance.

关键词： Brassica napus invertase Sclerotinia WGCNA RNA-seq

折线型复合式滑坡渐进破坏稳定性状态的力学判别

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岩土工程学报 2023年第6期45卷 1151-1161页

作者：杜毅晏鄂川蔡静森高旭柳万里中国地质大学(武汉)工程学院湖北武汉430074

折线型复合式滑坡各区段岩土体性质及应力状态的差异加剧了稳定性判别的难度,以该类滑坡为对象,研究其渐进破坏稳定性状态演化的力学判别。结合滑带土应变软化特性构建滑坡力学模型,将其渐进破坏过程划分为8个演化阶段,并依据静力平衡... 详细信息

折线型复合式滑坡各区段岩土体性质及应力状态的差异加剧了稳定性判别的难度,以该类滑坡为对象,研究其渐进破坏稳定性状态演化的力学判别。结合滑带土应变软化特性构建滑坡力学模型,将其渐进破坏过程划分为8个演化阶段,并依据静力平衡条件及传递系数法建立与之对应的稳定性计算方程,以示滑坡渐进发展中由首尾向中部区段间的荷载传递机制,揭示滑坡局部和整体所受荷载、应力分布与稳定性状态间的量化差异及演变规律。研究结果表明:演化初期滑坡稳定性降幅较小,当渐进破坏发展至中部锁固段时,滑坡稳定性开始大幅衰减。处于滑坡自主助力阶段之前于首尾两端布设的防治工程将是节能高效的,若处于该阶段内则需结合扰动荷载传递位置及自主荷载积累的大小来判定防治部位,错过该治理关键阶段应考虑以锁固段的稳定为主。

关键词：折线型复合式滑坡应变软化渐进破坏荷载传递稳定性状态