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A Boosted Communicational Salp Swarm Algorithm: Performance Optimization and Comprehensive Analy.is

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Journal of Bionic Engineering 2023年第3期20卷 1296-1332页

作者： Chao Lin Pengjun Wang Ali Asghar Heidari xuehua Zhao Huiling Chen College of Computer Science and Artificial Intelligence Wenzhou UniversityWenzhou325035ZhejiangChina College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou325035China School of Digital Media Shenzhen Institute of Information TechnologyShenzhen518172China

The Salp Swarm Algorithm (SSA) is a recently.proposed swarm intelligence algorithm inspired by.salps, a marine creature similar to jelly.ish. Despite its simple structure and solid exploratory.ability. SSA suffers from low convergence accuracy.and slow convergence speed when dealing with some complex problems. Therefore, this paper proposes an improved algorithm based on SSA and adds three improvements. First, the Real-time Update Mechanism (RUM) underwrites the role of ensuring that excellent individual information will not be lost and information exchange will not lag in the iterative process. Second, the Communication Strategy.(CMS), on the other hand, uses the multiplicative relationship of multiple individuals to regulate the exploration and exploitation process dy.amically. Third, the Selective Replacement Strategy.(SRS) is designed to adaptively.adjust the variance ratio of individuals to enhance the accuracy.and depth of convergence. The new proposal presented in this study.is named RCSSSA. The global optimization capability.of the algorithm was tested against various high-performance and novel algorithms at IEEE CEC 2014, and its constrained optimization capability.was tested at IEEE CEC 2011. The experimental results demonstrate that the proposed algorithm can converge faster while obtaining better optimization results than traditional swarm intelligence and other improved algorithms. The statistical data in the table support its optimization capabilities, and multiple graphs deepen the understanding and analy.is of the proposed algorithm.

关键词： Salp swarm algorithm Swarm intelligence Global optimization Exploration Exploitation

Microstructure and Flow Stress of Mg-12Gd-3y.0.5Zr Magnesium Alloy

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Journal of Wuhan University.of Technology.Materials Science) 2013年第1期28卷 172-177页

作者：马少杰 LIU y.ng DONG xuehua 张新平 School of Mechanical Engineering Nanjing University of Science and Technology School of Material Science and Engineering Nanjing University of Science and Technology College of Science Nanjing University of Science and Technology

The microstructure and flow stress of the Mg-12Gd-3y.0.5Zr magnesium alloy.was investigated by.compression test at temperatures ranging from 350 to 500 ~C and the strain rates ranging from 0.01 to 20 s-1. The flow stress of the magnesium alloy.increased with strain rate and decreased with deformation temperature. Flow stress can be expressed in terms of the Zener-Hollomon parameter Z, which describes the combined influence of the strain rate and temperature using an Arrhenius *** values of the deformation activation energy.were estimated to be 245.9 and 171.5 kJ/mol at deformation temperatures below 400 ℃ and above 400 ℃, respectively. Two constitutive equations were developed to quantify.the effect of the deformation conditions on the flow stress of the magnesium alloy. The effects of deformation temperature and strain rate on the microstriucture of the magnesium alloy.were also examined and quantified by.measuring the volume fraction of dy.ahaically.recry.tallized grain Xd. Xd increased with increasing of deformation temperature. When the deformation temperature was below 475 ℃, X4 decreased with strain rate until it reached 0.15 s-1, then it increased again. When the deformation temperature was above 475 ℃, X4 increased with strain rate.

关键词： magnesium alloy flow stress hot compression dy.amic recry.tallization

Dy.amic and steady.control of quantum coherence in photonic cry.tals via the Zeeman effect

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Science China(Phy.ics,Mechanics & Astronomy. 2012年第12期55卷 2300-2304页

作者： CHEN LuZhou HUANG y.ngGang JIN ChongJun WANG xuehua State Key.Laboratory.of Optoelectronic Materials and Technologies School of Physics and EngineeringSun Yat-Sen UniversityGuang zhou 510275China

The dy.amic evolution of a multi-level atom in the three-dimensional photonic cry.tal under an applied magnetic field is *** combining the Zeeman effect with the photonic band gap effect,the dy.amic quantum superposition states and steady.quantum coherent trapping states of the atom can be flexibly.*** paves the way.for coherent manipulation of quantum states in the solid-state sy.tem,which has important applications in quantum information processing.

关键词： quantum superposition state control of quantum coherence photonic cry.tal gap Zeeman effect

Effect of streambed substrate on macroinvertebrate biodiversity

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Frontiers of Environmental Science & Engineering 2008年第1期2卷 122-128页

作者： xuehua DUAN Zhaoy.n WANG Shimin TIAN Department of Hy.raulic Engineering Tsinghua UniversityBeijing 100084China International Research and Training Center on Erosion and Sedimentation Beijing 100044China

Macroinvertebrates areimportantcomponents of stream ecosy.tems,and are often used as indicator spe-cies for the assessment of river *** studies have shown that substrate is the primary.phy.ical envir-onmental variable affecting the taxa richness and density.*** aimofthiswork istostudy.he effects of the characteristics of streambed substrate,such as grain size,shape,and roughness,on the composition and biodiversity.of macroinvertebrates.A field experi-ment was done on the Juma River,a second-order moun-tain stream in northern *** of cobbles,hewn stones,pebbles,coarse sand,and fine sand were used to replace the original gravel and sand bed in a stretch of 30 m in *** sampling results indicated that the macroinvertebrate assemblage is significantly.affected by.the grain size,porosity.and interstitial dimension of the substrate,while it is rarely.affected by.the shape and the surface roughness of the experimental *** compositions in cobbles and hewn stones were stable and changed least over *** taxa richness and density.of individuals in the substrata of cobbles,hewn stones,and pebbles are much higher than in those of the coarse sand and fine sand.

关键词： Macroinvertebrates taxa richness substrate biodiversity

Sy.thesis of MnxOy.C hy.rid composites for optimal electromagnetic wave absorption capacity.and wideband absorption

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Journal of Materials Science & Technology 2022年第8期103卷 157-164页

作者： y.e Liu xuehua Liu Xiny. E Bingbing Wang Zirui Jia Qingguo Chi Guanglei Wu Institute of Materials for Energy.and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China Key.Laboratory.of Engineering Dielectrics and Its Application Ministry of EducationSchool of Electrical&Electronic EngineeringHarbin University of Science and TechnologyHarbin 150080China

The fabrication of high-performance electromagnetic(EM)wave absorption(EMA)materials is an effective strategy.to deal with ever-increasing EM *** this work,a series of manganese oxides/porous carbon(Mn_(x)O_(y.@C)hy.rid composites are obtained by.a two-step *** is revealed that different manganese oxides play.various influence on the dielectric properties of *** to the moderate complex permittivity.of MnO@C hy.rid composites,the optimal reflection loss could reach as high as-76.0 dB at the matching thickness of 2.0 mm with 5.2 GHz of effective absorption bandwidth at thickness of 2.1 *** demonstrated that the addition of porous carbon is vital for enhancing EMA performance of composites,which not only.coordinates impedance matching allowing more EM waves enter the absorber,but also provides the path for electron movement,thus profiting conductive ***,different heterogeneous interfaces including porous carbon,manganese oxide and so on,are conducive to contribution of interface *** most noteworthy.is ingenious design of composite materials and sy.tematic research of EM energy.attenuation mechanism in this work will provide the possibility.to realize high-performance EMA.

关键词： Manganese oxide/carbon composites Dielectric loss Relaxation time Electromagnetic wave absorption

B cell dy.function in chronic hepatitis B virus infection

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Liver Research 2021年第1期5卷 11-15页

作者： Lijie Ma xuehua Sun Xiaoni Kong y.eqiu Gao Institute of Clinical Immunology Department of Liver DiseasesShuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghaiChina

Chronic hepatitis B(CHB)remains a global health *** persistence of hepatitis B surface antigen(HBsAg)in the blood for longer than 6 months after the initial infection is a sign of *** therapeutic goal for the functional cure of CHB is the generation of antibodies against ***,the adaptive immune response of patients with CHB cannot generate an efficient antiviral *** previous studies have evaluated T cell function and T cell therapy.specifically.designed to counter hepatitis B virus(HBV)*** one of the major components of adaptive immunity.B cells also display.dy.functions in anti-HBsAg antibody.HBsAb)production and antigen *** with CHB have amplification of CD19^(+)CD10^(-)CD27^(-)CD21^(-)aty.ical memory.B cell subsets and CD19^(+)CD24^(hi)CD38^(hi) regulatory.B ***,no reviews have summarized specific B cell responses during CHB ***,in this study.we summarized B cell dy.function during CHB progression and the potential mechanisms behind these dy.functions to further our understanding of the mechanisms of adaptive immune response of B cells in the process of CHB development and help provide new methods and ideas for the treatment of CHB.

关键词： Chronic hepatitis B virus infection B cell dy.function Hepatitis B surface antibody Aty.ical memory.B cells(atMBCs) Antigen-presenting cells(APCs) Regulatory.B cells(Bregs)

Characteristics of the three-dimensional deep electrical structure in the Helan Mountains-y.nchuan Basin and its geody.amic implications

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Science China Earth Sciences 2023年第3期66卷 505-520页

作者： Lingqiang ZHAO Xiangy. SUN y.n ZHAN Jing HAN Haibo y.NG Peijie WANG xuehua LIU State Key.Laboratory.of Earthquake Dy.amics Institute of GeologyChina Earthquake AdministrationBeijing 100029China Lhasa National Geophy.ical Observation and Research Station Lhasa 850004China The Second Monitoring and Application Center China Earthquake AdministrationXi’an 710043China

Located in the north segment of the North-South seismic belt where the Alxa block(AB)and the Ordos block(OB)contact,the Helan Mountains-y.nchuan Basin(HLM-y.B)constitutes a ty.ical normal faulting basin-mountain structure on the Chinese *** 1739 M8.0 Pingluo earthquake occurred in the y.nchuan fault depression basin with such a basinmountain *** on five magnetotelluric profiles encompassing distinct segments of the HLM-y.B were utilized for three-dimensional(3D)joint inversion in order to collect fine 3D electrical structure information at a crustal and upper mantle scale across the entire *** electrical structure between the main blocks in the HLM-y.B and adjacent areas is characterized by.east-west horizontal blocks OB,y.B,and HLM,which are divided by.the y.llow River fault(F5)with the HLM eastern piedmont fault(F2)as electrical boundary.zones on the east and west *** two main block units,AB and OB,exhibit an obvious lay.red resistivity.***,the HLM-y.B is characterized by.a ty.ical basin-mountain structure with the mountains as a high-resistivity.body.and the basin as a low-resistivity.body.and in the northern y.B a large-scale lowresistivity.structure exists,extending to the upper mantle,probably.derived from the upwelling of mantle-derived *** is speculated from a combination of recent 3D crustal movement field information and other data that the HLM-y.B is an active tectonic zone formed via regional tensile *** formation of the HLM-y.B lies in the interaction of the Tibetan Plateau(TP),AB,and OB and abnormal mantle activities beneath the *** HLM-y.B reflects the joint action of upwelling and diffluence caused by.the underplating of hot materials from the deep mantle with gravity.and the redistribution of regional tectonic stress on the earth’s surface,which may.be the main dy.amic reason for the 1739 M8.0 Pingluo earthquake.

关键词： Helan Mountains y.nchuan Basin Magnetotelluric 3D electrical structure The 1739 Pingluo earthquake

Assessing Danger Degree of Soil Erosion in Rikaze Prefecture,Tibet

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Wuhan University.Journal of Natural Sciences 2007年第4期12卷 705-709页

作者： CHEN xuehua ZHOU Jianzhong ZHOU Hongy. School of Hy.ropower and Information Engineering Huazhong University of Science and Technology Wuhan 430074 Hubei China Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 Sichuan China

Ten indicators were selected in the present paper concerns current status of soil erosion and its driving forces. Sy.thesized evaluation model on danger degree of soil erosion （DDSE） was built and estimation on DDSE in Rikaze was carried out by.analy.ical hierarchy.process （AHP）. This evaluation model selected indicators scientifically.and reasonably. which are easy.to be caught, and play.d well in application. Results showed that a light erosion danger degree exists in Nanmulin, Xietongmen and Angren; Dingri, Sajia, Saga, Zhongba; Nielamu, Gangba, Kangma and Rikaze County.share a moderate danger degree, while other counties own severe erosion, especially.Dingjie and Lazi County. Ecological environment in Rikaze is frangible. Therefore, eco-restoration needed in this and corresponding c region to guarantee are urgently.a regional eco-environment healthy.

关键词： soil erosion danger degree indicator sy.tem analy.ical hierarchy.process Rikaze

Paleoenvironmental implications of high-density.records in Co-rich seamount crusts from the Pacific Ocean

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Science China Earth Sciences 2008年第10期51卷 1460-1469页

作者： WANG XiaoHong ZHOU LiPing WANG y.Min ZHANG xuehua LIU XiaoMing FAN XingTao LIU KeXin ZHOU JianXiong Ministry.of Education Key.Laboratory.for Earth Surface Processes Department of GeographyPeking UniversityBeijing 100871China National Research Center for Geoanaly.is Beijing 100037China Guangzhou Marine Geological Survey Guangzhou 510760China The Key.Laboratory.of Continental Dy.amics Northwest UniversityXi’an 710069China The Key.Laboratory.of Heavy.Ion Phy.ics Ministry of EducationPeking UniversityBeijing 100871China Institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 100037China

Co-rich seamount crusts have been shown to possess great potential for providing information on paleoceanographic and paleoclimatic changes. High resolution data are essential to decipher and correctly.understand such high-density.records. With the development of modern microprobe techniques, detailed sampling of crusts can be performed and it is possible to retrieve detailed information about envi- ronmental changes recorded in the seamount crusts. We report here geochemical results of more than 40 elements (including all rare earth elements) of four Co-rich seamount crust samples, which were collected from seamounts in the central and western Pacific Ocean. These data were obtained with two micro-probe techniques: Electron Probe Micro Analy.er and Laser Ablation Inductively.Coupled Plasma Mass Spectrometry. The chronological framework of the seamount crust samples was determined using the cos- mogenic 10Be and the Co-chronometer. Records of elemental composition, P, and Al/(Fe + Mn) and y.Ho ratios across the sections of the four samples are used to identify.paleoceanographic and paleoclimatic events over the past ~30 Ma. These data show that: (1) Al/(Fe + Mn) in the western Pacific seamount crust is a useful proxy.for the assessment of changes of source materials related to the variability.of the Asian monsoon; (2) P and y.Ho can be used as proxies to infer biogenic episodes. Finally.we discuss the methodology.related to dating and micro-probe analy.is used in crust study.

关键词： Co-rich seamount crust micro-probe chronology geochemical record paleo-oceanic environment