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Collective m.vem.nt Sim.lation:m.thods and Applications

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m.chine Intelligence Research 2024年第3期21卷 452-480页

作者： Hua Wang Xing-yu Guo hao Tao m.ng-Liang Xu School of Com.uter and Artificial Intelligence Zhengzhou UniversityZhengzhou450001China Engineering Research Center of Intelligent Swarm.System. Ministry of EducationZhengzhou450001China National Supercom.uting Center in Zhengzhou Zhengzhou450001China China Ship Developm.nt and Design Center Wuhan430060China

Collective m.vem.nt sim.lations are challenging and im.ortant in m.ny areas,including life science,m.them.tics,physics,inform.tion science and public *** this survey,we provide a com.rehensive review of the state-of-the-art techniques for collective m.vem.nt *** start with a discussion on certain concepts to help beginners understand it m.re ***,we analyze the intelligence am.ng different collective objects and the em.hasis in different ***,we classify existing collective m.vem.nt sim.lation m.thods into four categories according to their effects,nam.ly versatility,accuracy,dynam.c adaptability,and assessm.nt feedback ***,we introduce five applications of layout optim.zation,em.rgency control,dispatching,unm.nned system.,and other derivative ***,we sum.arize possible future research directions.

关键词： Collective m.vem.nt sim.lation m.ltiple objects m.ltiple discipline sim.lation effect collective intelligence

Stage separation of recoverable liquid launch vehicle by using m.ving pulsating ball analogue for propellant sloshing

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Chinese Journal of Aeronautics 2024年第2期37卷 360-370页

作者： yu LU Baozeng yuE Bailong hao Bole m. Feng LIU yuanyuan CHANG School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Astronautical System. Engineering Beijing 100076China

In the process of stage separation of recoverable liquid launch vehicles,because of the large am.unt of residual fuel in the storage tanks,the influence of liquid sloshing on separation safety m.st be *** calculation sim.licity and operation practicability,the m.ving Pulsating Ball m.del(m.Bm.of large am.litude liquid sloshing is introduced into the calculation of launch vehicle stage *** the dynam.c equation of the m.del with the energy relationship during"breathing m.vem.nt",the form.la calculating the force of liquid on the rigid body is *** with the calculations of com.ercial CFD calculation software,the accuracy of m.Bm.m.del is ***,all the external forces and m.m.nts are applied to the rigid body of the stages,so that the translational and rotational dynam.c equations of the stages are obtained *** to the relative position of the two stages,the geom.tric shape of the interstage section and the engine of the second stage,the m.nim.m.clearance in the separation process can be decided to guarantee that the separation process is safe.

关键词： m.ving Pulsating Ball m.del(m.Bm. Dynam.cs of stage separation Large am.litude sloshing Recoverable liquid launch vehicle Flight dynam.cs

m.delling the viscoplastic behaviour of Callovo-Oxfordian claystone with consideration of dam.ge effect

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Journal of Rock m.chanics and Geotechnical Engineering 2024年第1期16卷 303-316页

作者： hao Wang yu-Jun Cui m.nh Ngoc Vu Jean Talandier Ecole des Ponts ParisTech Laboratoire Navier/CERMES6 et 8 avenue Blaise PascalMarne La Vallée cedex 277455France Andra R&D DepartmentChâtenay-Malabry92290France

In order to evaluate the perform.nce of deep geological disposal of radioactive waste,an underground research laboratory(URL)was constructed by Andra in the Callovo-Oxfordian(COx)claystone form.tion at the m.use/Haute-m.rne(m.m..The construction of URL induced the excavation dam.ge of host form.tions,and the ventilation in the galleries desaturated the host form.tion close to the gallery ***,it is expected that the m.chanical behaviour of COx claystone is *** study presents a constitutive m.del developed to describe the viscoplastic behaviour of unsaturated and dam.ged COx *** this m.del,the unsaturation effect is considered by adopting the Bishop effective stress and the van Genuchten(VG)water retention *** term. of the viscoplastic behaviour,the nonstationary flow surface(NSFS)theory for unsaturated soils is used with consideration of the coupled effects of strain rate and suction on the yield stress.A progressive hardening law is ***,a non-associated flow rule is used,which is sim.lar to that in Barcelona basic m.del(BBm..In addition,to describe the dam.ge effect induced by suction change and viscoplastic loading,a dam.ge function is defined based on the crack volum. *** dam.ge function contains two variables:unsaturated effective stress and viscoplastic volum.tric strain,with the related param.ters determ.ned based on the m.rcury intrusion porosim.try(m.P)*** the m.del validation,different tests on COx claystone under different loading paths are *** between experim.ntal and sim.lated results indicated that the present m.del is able to well describe the viscoplastic behaviour of dam.ged COx claystone,including swelling/shrinkage,triaxial extension and com.ression,and triaxial creep.

关键词： Callovo-Oxfordian(COx)claystone Excavation dam.ge Tim.-dependent behaviour Suction Viscoplastic m.del

Adjustm.nt m.chanism.of blasting dynam.c-static action in the water decoupling charge

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International Journal of m.ning Science and Technology 2024年第6期34卷 821-836页

作者： hao Zhang Xueyang Xing Yiteng Du Tingchun Li Jianxin yu Qingwen Zhu College of Civil Engineering and Architecture Shandong University of AeronauticsBinzhou 256600China Shandong Key Laboratory of Civil Engineering Disaster Prevention and m.tigation Shandong University of Science and TechnologyQingdao 266590China School of Civil Engineering Henan Polytechnic UniversityJiaozuo 454003China

Water decoupling charge blasting excels in rock breaking,relying on its uniform.pressure transm.ssion and low energy *** water decoupling coefficients can adjust the contributions of the stress wave and quasi-static ***,the quantitative relationship between the two contributions is unclear,and it is difficult to provide reasonable theoretical support for the design of water decoupling *** this study,a theoretical m.del of blasting fracturing partitioning is *** m.chanical m.chanism.and determ.nation m.thod of the optim.l decoupling coefficient are *** reliability is verified through m.del experim.nts and a field *** results show that with the increasing of decoupling coefficient,the rock breaking ability of blasting dynam.c action decreases,while quasi-static action increases and then *** ability of quasi-static action to wedge into cracks changes due to the spatial adjustm.nt of the blast hole and crushed *** quasi-static action plays a leading role in the fracturing range,determ.ning an optim.l decoupling *** optim.l water decoupling coefficient is not a fixed value,which can be obtained by the proposed theoretical *** with the theoretical results,the m.xim.m.error in the m.del experim.nt results is 8.03%,and the error in the field test result is 3.04%.

关键词： Water decoupling blasting Blasting dynam.c-static action Optim.l decoupling coefficient Adjustm.nt m.chanism

Extraction m.thod of typical IEQ spatial distributions based on low-rank sparse representation and m.lti-step clustering

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Building Sim.lation 2024年第6期17卷 983-1006页

作者： yuren Yang Yang Geng hao Tang m.feng yuan Juan yu Borong Lin School of Architecture Tsinghua UniversityBeijingChina Key Laboratory of Eco Planning&Green Building Ministry of EducationTsinghua UniversityBeijingChina

Indoor environm.nt quality(IEQ)is one of the m.st concerned building perform.nces during the operation *** non-uniform.spatial distribution of various IEQ param.ters in large-scale public buildings has been dem.nstrated to be an essential factor affecting occupant com.ort and building energy ***,IEQ sensors have been widely em.loyed in buildings to m.nitor therm.l,visual,acoustic and air ***,there is a lack of effective m.thods for exploring the typical spatial distribution of indoor environm.ntal quality param.ters,which is crucial for assessing and controlling non-uniform.indoor *** this study,a novel clustering m.thod for extracting IEQ spatial distribution patterns is ***,representation vectors reflecting IEQ distributions in the concerned space are generated based on the low-rank sparse ***,a m.lti-step clustering m.thod,which addressed the problem. of the“curse of dim.nsionality”,is designed to obtain typical IEQ distribution patterns of the entire indoor *** proposed m.thod was applied to the analysis of indoor therm.l environm.nt in Beijing Daxing international airport *** a result,four typical tem.erature spatial distribution patterns of the term.nal were extracted from.a four-m.nth m.nitoring,which had been validated for their good *** typical patterns revealed typical environm.ntal issues in the term.nal,such as long-term.localized overheating and tem.erature increases due to a sudden influx of *** extracted typical IEQ spatial distribution patterns could assist building operators in effectively assessing the uneven distribution of IEQ space under current environm.ntal conditions,facilitating targeted environm.ntal im.rovem.nts,optim.zation of therm.l com.ort levels,and application of energy-saving m.asures.

关键词： indoor environm.nt quality(IEQ) therm.l environm.nt spatial distribution tem.erature field low-rank sparse representation(LRSR) clustering

A late Carboniferous transition from.subduction to collision:Tectonosedim.ntary evidence from.southern Junggar,NW China

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Geoscience Frontiers 2024年第3期15卷 166-179页

作者： Shuoqin Hou Di Li Dengfa He yu Lu yu Zhen hao Yang Dan Fan Key Laboratory of m.rine Reservoir Evolution and Hydrocarbon Accum.lation m.chanism the Ministry of Educationand School of Energy ResourcesChina University of Geosciences(Beijing)Beijing 100083China

The Carboniferous to Perm.an tectono-sedim.ntary evolution of the southern Junggar area brings new insights into understanding the subduction-collision processes in the northern Tianshan *** geophysics,geochem.stry,and geochronology approaches,this study investigates the Carboniferous-Perm.an strata in the southern Junggar *** results have revealed three distinct tectono-stratigraphic evolutionary stages,each m.rked by a distinctive volcano-sedim.ntary *** Early Carboniferous strata suggest intense volcanic activities in the southern Junggar *** the Late Carboniferous,the southern Junggar Basin was controlled by norm.l faulting in an extensional setting,receiving sedim.ntary inputs from.the Junggar *** Lower Perm.an,unconform.bly overlying the Upper Carboniferous,was shaped by an extensional regim. and is com.rised by volcano-clastic sequences that received detritus from.the Yili-Central Tianshan *** findings indicate that a Late Carboniferous forearc basin developed in the southern Junggar area,and it evolved into a post-collisional rift in the Early *** period m.rked a dynam.c shift from.bidirectional subduction(rollback)to the detachm.nt of the North Tianshan oceanic *** propose that the collision between the YiliCentral Tianshan block and the Junggar terrane,along with the closure of the North Tianshan Ocean,likely occurred in the Late Carboniferous(ca.306-303 m.).

关键词： Tectono-sedim.ntary evolution Tectonic transition Carboniferous-Perm.an Junggar Basin North Tianshan Ocean

Effect of coral sand on the m.chanical properties and hydration m.chanism.of m.gnesium.potassium.phosphate cem.nt m.rtar

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第2期25卷 116-129页

作者： hao LIU Huam.i YANG Houzhen WEI Jining yu Qingshan m.NG Rongtao YAN College of Civil Engineering and Architecture Guilin University of TechnologyGuilin541004China Guangxi Key Laboratory of Geom.chanics and Geotechnical Engineering Guilin University of TechnologyGuilin541004China State Key Laboratory of Geom.chanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China School of Intelligent Construction Wuchang University of TechnologyWuhan430002China Hydraulic Concrete Institute China Three Gorges CorporationBeijing100038China The First Railway Survey and Design Institute Group Corporation Xi’an710043China

Dam.ged structures on coral islands have been spalling and cracking due to the dual corrosion of tides and *** ensure easy access to aggregate m.terials,m.gnesium.potassium.phosphate cem.nt(m.PC)and coral sand(CS)are m.xed to repair dam.ged structures on coral ***,CS is significantly different from.land-sourced sand in m.neral com.osition,particle m.rphology,and *** has a substantial im.act on the hydration characteristics and m.croscopic properties of m.PC ***,in this study we investigated the com.ressive strength,interfacial m.chanical properties,and corrosion resistance of m.PC CS *** in the m.rphology,m.crostructure,and relative contents of hydration products were revealed by scanning electron m.croscope-energy dispersive spectrom.ter(SEm.EDS)and X-ray diffraction(XRD).The results indicated that the com.ressive strength increased linearly with the interfacial m.cro-hardness,and then stabilized after long-term.im.ersion in pure water and Na2SO4 solution,showing excellent corrosion *** with m.PC river sand(RS)m.rtar,the hydration products of CS m.rtar were an interm.diate product 6KPO2·8H2O with a relative content of 3.9%at 1 h and 4.1%at 12 *** hydration product m.KPO_(4)·6H_(2)O increased rapidly after 7-d curing,with an increased growth rate of 1100%.Our results showed that CS prom.ted the nucleation and form.tion of hydration products of m.PC,resulting in better crystallinity,tighter overlapping,and a denser interfacial transition *** results of this study provide technical support for applying m.PC m.rtar as a rapid repair m.terial for dam.ged structures on coral islands.

关键词： m.gnesium.potassium.phosphate cem.nt(m.PC) Coral sand(CS) m.chanical properties Corrosion resistance Hydration m.chanism

Enhancing hydrogen evolution and oxidation kinetics through oxygen insertion into nickel lattice

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Journal of Energy Chem.stry 2024年第8期95卷 529-539,I0012页

作者： Wanli Liang Xiyu Gong Jinchang Xu Zixuan Dan Fanyan Xie Hulei yu hao-Fan Wang Yanshuo Jin Hongjuan Wang Yonghai Cao Hui m.ng hao yu School of Chem.stry and Chem.cal Engineering South China University of TechnologyGuangzhou 510641GuangdongChina Siyuan Laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsGuangdong Provincial Key Laboratory of Optical Fiber Sensing and CommunicationsDepartment of PhysicsJinan UniversityGuangzhou 510632GuangdongChina GBA Branch of Aerospace Inform.tion Research Institute Chinese Academy of SciencesGuangzhou 510700GuangdongChina Instrum.ntal Analysis&Research Center Sun Yat-sen UniversityGuangzhou 510275GuangdongChina School of m.terials Science and Engineering South China University of TechnologyGuangzhou 510641GuangdongChina

Nickel-based m.terials,including m.tallic Ni and Ni oxide,have been widely studied in the exploration of non-precious-m.tal hydrogen electrocatalysts,but neither pure Ni nor NiO is ideal for the hydrogen evolution reaction(HER)and hydrogen oxidation reaction(HOR).In this paper,an oxygen insertion strategy was applied on nickel to regulate its hydrogen electrocatalytic perform.nce,and the oxygen-inserted nickel catalyst was successfully obtained with the assistance of tungsten dioxide support(denoted as O-Ni/WO_(2)).The partial insertion of oxygen in Ni m.intains the face-centered cubic arrangem.nt of Ni atom.,sim.ltaneously expanding the lattice and increasing the lattice ***,the adsorption strength of^(*)H and^(*)OH on Ni is optim.zed,thus resulting in superior electrocatalytic perform.nce of0-Ni/WO_(2)in alkaline HER/*** Tafel slope of O-Ni/WO_(2)@NF for HER is 56 m. dec^(-1),and the kinetic current density of O-Ni/WO_(2)for HOR reaches 4.85 m. cm.(-2),which is ahead of m.st currently reported *** proposed strategy of inserting an appropriate am.unt of anions into the m.tal lattice could provide m.re possibilities for the design of high-perform.nce catalysts.

关键词： Hydrogen evolution Hydrogen oxidation Nickel Oxygen insertion Adsorption free energy

A hybrid physics-inform.d data-driven neural network for CO_(2) storage in depleted shale reservoirs

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Petroleum.Science 2024年第1期21卷 286-301页

作者： Yan-Wei Wang Zhen-Xue Dai Gui-Sheng Wang Li Chen yu-Zhou Xia yu-hao Zhou College of Construction Engineering Jilin UniversityChangchun130026JilinChina Institute of Intelligent Sim.lation and Early Warning for Subsurface Environm.nt Jilin UniversityChangchun130026JilinChina School of Energy Resources China University of GeosciencesBeijing100083China Departm.nt of Safety Environmental Protection and Quality ManagementShengli OilfieldSinopecDongying257000ShandongChina Key Laboratory of Therm.-Fluid Science and Engineering of m.E School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an710049ShaanxiChina College of Com.uter Science and Technology China University of Petroleum(East China)Qingdao266580ShandongChina Departm.nt of Physics University of FribourgFribourg1700Switzerland

To reduce CO_(2) em.ssions in response to global clim.te change,shale reservoirs could be ideal candidates for long-term.carbon geo-sequestration involving m.lti-scale transport ***,m.st current CO_(2) sequestration m.dels do not adequately consider m.ltiple transport ***,the evaluation of CO_(2) storage processes usually involves laborious and tim.-consum.ng num.rical sim.lations unsuitable for practical prediction and *** this paper,an integrated m.del involving gas diffusion,adsorption,dissolution,slip flow,and Darcy flow is proposed to accurately characterize CO_(2) storage in depleted shale reservoirs,supporting the establishm.nt of a training *** this basis,a hybrid physics-inform.d data-driven neural network(HPDNN)is developed as a deep learning surrogate for prediction and *** incorporating m.ltiple sources of scientific knowledge,the HPDNN can be configured with lim.ted sim.lation resources,significantly accelerating the forward and inversion ***,the HPDNN can m.re intelligently predict injection perform.nce,precisely perform.reservoir param.ter inversion,and reasonably evaluate the CO_(2) storage capacity under com.licated *** validation and test results dem.nstrate that the HPDNN can ensure high accuracy and strong robustness across an extensive applicability range when dealing with field data with m.ltiple noise *** study has trem.ndous potential to replace traditional m.deling tools for predicting and m.king decisions about CO_(2) storage projects in depleted shale reservoirs.

关键词： Deep learning Physics-inform.d data-driven neural network Depleted shale reservoirs CO_(2)storage Transport m.chanism.