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Interfacial stress transfer behavior in a specially.shaped fiber/m.trix pullout test

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Acta m.chanica Sinica 2010年第1期26卷 113-119页

作者： y. R. Zhao y. m. xing Z. K. Lei F. C. Lang School of Civil Engineering Inner Mongolia University of Technology 010051 Hohhot China Departm.nt of Applied m.chanics Inner Mongolia University of Technology010051 Hohhot China State Key.Laboratory.of Structural Analy.is for Industrial Equipm.nt Dalian University of Technology116024 Dalian China

Specially.designed fibers are widely.used in engineering practice because the specially.designed shape can help to im.rove the bonding strength of the fiber and the interface. Studied in this paper is the interfacial shear stress transfer behavior on both sides of the specially.designed fiber when it is being pulled out; in which autom.tic analy.is of three-dim.nsional photoelasticity.is em.loy.d and the finite elem.nt m.thod is adopted. The results show that the stress transfer occurs m.inly.in the region near the fiber＇s em.edded end where the stress reaches its critical point, leading to debonding of the interface. Before debonding, as the pullout loading increases, the peak value of shear stress transfers along the fiber from.the em.edded end to the interior of the m.trix, and then stops at the hooked part of the fiber because of its im.edim.nt. When the interface begins to debond as the load increases, the shear stress can be transferred to the hooked part.

关键词： Fiber-reinforced com.osites Specially.shaped fiber Interfacial stress transfer Photo-elasticity.- FEm

Accelerated Prim.l-Dual Projection Neurody.am.c Approach With Tim. Scaling for Linear and Set Constrained Convex Optim.zation Problem.

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IEEE/CAA Journal of Autom.tica Sinica 2024年第6期11卷 1485-1498页

作者： y.u Zhao xing He m.ngliang Zhou Tingwen Huang Chongqing Key.Laboratory.of Nonlinear Circuits and Intelligent Inform.tion Processing College of Electronic and Information EngineeringSouthwest UniversityChongqing 400715China School of Com.uter Science Chongqing UniversityChongqing 400044China Departm.nt of m.them.tics Texas A&M University at QatarDoha 23874Qatar IEEE

The Nesterov accelerated dy.am.cal approach serves as an essential tool for addressing convex optim.zation problem. with accelerated convergence *** previous studies in this field have prim.rily.concentrated on unconstrained sm.oth con-vex optim.zation *** this paper,on the basis of prim.l-dual dy.am.cal approach,Nesterov accelerated dy.am.cal approach,projection operator and directional gradient,we present two accelerated prim.l-dual projection neurody.am.c approaches with tim. scaling to address convex optim.zation problem. with sm.oth and nonsm.oth objective functions subject to linear and set constraints,which consist of a second-order ODE(ordinary.differential equation)or differential conclusion sy.tem.for the prim.l variables and a first-order ODE for the dual *** satisfy.ng specific conditions for tim. scaling,we dem.nstrate that the proposed approaches have a faster conver-gence *** only.requires assum.ng convexity.of the objective *** validate the effectiveness of our proposed two accel-erated prim.l-dual projection neurody.am.c approaches through num.rical experim.nts.

关键词： Accelerated projection neurody.am.c approach lin-ear and set constraints projection operators sm.oth and nonsm.oth convex optim.zation tim. scaling.

Study.on concentration distribution and detonation characteristics for non-axisy.m.tric fuel dispersal

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Defence Technology.防务技术） 2024年第1期31卷 484-495页

作者： Linghui Zeng Zhongqi Wang xing Chen Jianping Li State Key.Laboratory.of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China College of Environm.nt and Chem.cal Engineering Sichuan University of Science&EngineeringZigong643000China

The study.of non-axisy.m.tric fuel dispersal and detonation can provide reference for the prevention of industrial cloud explosion accidents and the design of fuel air explosive(FAE).The concentration and detonation fields of 85 kg cy.indrical and fan-shaped fuel are investigated by.experim.nts and num.rical sim.lations.A dy.am.c m.del of the whole process for fuel dispersal and detonation is *** concentration distribution of fuel is used as the initial condition to calculate the detonation stage,thus solving the initial value problem.of detonation *** phase and com.onent changes of fuel cloud at different locations are *** fuel cloud is divided into directions of 0°,90°,135°and 180°.The results show that the m.xim.m.cloud radius is 20.94 m.in 135°and the m.nim.m.is 12.04 m.in 0°.The diam.ter of the detonation fireball is 53.6 m.and the peak tem.erature is 3455 *** highest peak overpressure is 3.44 m.a in 0°and the lowest is 2.97 m.a in 135°.The proportion of liquid phase in 0°is22.90%,and the fuel loss is 11.8% and 9% higher than that in 135°and cy.indrical charge,*** stable propagation distance of blast wave in 135°is 42.50% longer than 0°and 28.37% longer than cy.indrical charge.

关键词： Fuel dispersal Concentration distribution Detonation characteristic Fuel loss Num.rical sim.lation

Optical third-harm.nic generation of spherical quantum.dots under inversely.quadratic Hellm.nn plus inversely.quadratic potential

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Com.unications in Theoretical Phy.ics 2024年第9期76卷 160-165页

作者： xing Wang Xuechao Li School of m.chanics and Photoelectric Phy.ics Anhui University of Science and Technology

The third-harm.nic generation（THG） coefficient for a spherical quantum.dot sy.tem.with inversely.quadratic Hellm.nn plus inversely.quadratic potential is investigated theoretically.considering the regulation of quantum.size, confinem.nt potential depth and the external environm.nt. The num.rical sim.lation results indicate that the THG coefficient can reach the order of 10-12m.V-2, which strongly.relies on the tunable factor, with its resonant peak experiencing a redshift or blueshift. Interestingly. the effect of tem.erature on the THG coefficient in term. of peak location and size is consistent with the quantum.dot radius but contrasts with the hy.rostatic pressure. Thus, it is crucial to focus on the influence of internal and external param.ters on nonlinear optical effects, and to im.lem.nt the theory.in practical experim.nts and the m.nufacture of optoelectronic devices.

关键词： inversely.quadratic hellm.nn potential inversely.quadratic potential nonlinear optical effects quantum.dot third harm.nic generation coefficient

Vision-based docking sy.tem.for an arom.tic-hy.rocarbon-inspired reconfigurable robot

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Science China(Technological Sciences) 2024年第6期67卷 1798-1816页

作者： xing Fangy. XU Cheng LIU JinGuo XUE ZhiHui State Key.Laboratory.of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang110016China School of Autom.tion and Electrical Engineering Shenyang Ligong UniversityShenyang110158China Institutes for Robotics and Intelligent m.nufacturing Chinese Academy of SciencesShenyang110169China University.of Chinese Academ.0}of Sciences Beijing100049China

Arom.tic hy.rocarbons generally.refer to com.ounds containing benzene *** ty.es of isom.rs can be form.d by.replacing hy.rogen atom. on the benzene *** this paper,an arom.tic-hy.rocarbon-inspired m.dular robot(AHIm.)is *** robot can be reassem.led into different configurations suitable for various task requirem.nts.A vision-based docking sy.tem.is designed for the *** sy.tem.prim.rily.consists of two stages:a rem.te guidance stage and a precise docking *** the rem.te guidance stage,an object m.dule is identified using an illum.nation adaptive target recognition algorithm.and then the active m.dule m.ves to the docking area through com.unication with *** the precise docking stage,the active m.dule calculates the relative pose with the object m.dule using a perspective-n-point m.thod and dy.am.cally.adjusts its posture to *** this process,a Kalm.n filter is used to reduce target occlusion and jitter *** addition,the docking sy.tem.feasibility.is verified via several sim.lation *** m.dule docking accuracy.is controlled within 0.01 m.which m.ets the reconfiguration task requirem.nts of the *** the AHIm. subm.dule docking experim.nt,the active m.dule accurately.m.ves to the expected position with a docking success rate of 95%.

关键词： m.dular robot reconfiguration arom.tic hy.rocarbon autonom.us docking visual identification

In-situ em.edded ultrafine Bi_(12)O_(17)Br_(2)nanotubes in m.F-derived hierarchical porous carbon for enhanced photocataly.ic CO_(2)conversion to CO

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Journal of m.terials Science & Technology 2024年第4期171卷 47-53页

作者： xing Sun m.ngxia Ji y. Zhang Qingzeng xing Zihan Liu Nianhua Liu Em.anuel Nkudede Huam.ng Li Sheng y.n Jiexiang Xia School of Chem.stry.and Chem.cal Engineering Institute for Energy ResearchJiangsu UniversityZhenjiang 212013China Key.Laboratory.of Com.rehensive and Highly.Efficient Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Resources Chemistry of Salt LakesQinghai Institute of Salt LakesChinese Academy of SciencesXining 81008China

Increasing the utilization efficiency.of photogenerated electrons is highly.recognized as one of the ef-ficient approaches to boost the photocataly.ic CO_(2)conversion ***,ZIF-67-derived porous carbon(PC)m.terial was em.loy.d for the construction of PC@ultrafine Bi_(12)O_(17)Br_(2)nanotubes(PC@BOB NTs)com.osites through a facile solvotherm.l sy.thesis in order to optim.ze the use of excited elec-trons in the BOB *** characterization results revealed that the introduction of PC m.terial achieved a faster charge separation rate in the PC@BOB com.osites,ensuring m.re photogener-ated electrons participate in the CO_(2)adsorption and activation ***,the pore structures of ZIF-67-derived PC m.terial provided abundant confined spaces for the enrichm.nt of CO_(2)***-ter 5 h of Xenon lam. irradiation,PC@BOB com.osites exhibited obviously.increased photocataly.ic CO_(2)reduction activity.in the pure *** the addition am.unt of PC was 5 wt%,the PC@BOB-2 com.posite showed the highest CO evolution rate of 359.70μm.l/g,which was 2.95 tim.s higher than that of the pure BOB *** work provides som. independent insights into the applications of m.tal-Organic Fram.work(m.F)-derived hierarchical porous structures to strengthen the CO_(2)enrichm.nt,as well as the excited charge utilization efficiency.thus achieving a high solar-to-fuel conversion efficiency.

关键词： Bi_(12)O_(17)Br_(2)nanotubes Hierarchical porous structure CO_(2)enrichm.nt Charge separation CO_(2)photoreduction

Aerial refueling scheduling of m.lti-receiver and m.lti-tanker under spatial-tem.oral constraints for forest firefighting

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Chinese Journal of Aeronautics 2024年第5期37卷 71-91,I0001页

作者： Jing HUANG Jiaqi xing Jinrui REN Quan QUAN y.um.n ZHANG Departm.nt of Inform.tion and Control Engineering Xi’an University of TechnologyXi’an 710048China Jiujiang m.asuring Test Technology.Research Institute Jiujiang 332000China School of Autom.tion Science and Electrical Engineering Beihang UniversityBeijing 100191China School of Autom.tion Xi’an University of Posts&TelecommunicationsShaanxiXi’an 710121China Departm.nt of m.chanical Industrial and Aerospace EngineeringConcordia UniversityMontreal H3G 1M8Canada

Forest fires pose a significant threat to hum.n life and property.so the utilization of unm.nned aircraft sy.tem. provides new way. for forest *** the constrained load capacities of these aircraft,aerial refueling becom.s crucial to extend their operational tim. and *** order to address the com.lexities of firefighting m.ssions involving m.lti-receiver and m.lti-tanker deploy.d from.various airports,first,a fuel consum.tion calculation m.del for aerial refueling scheduling is established based on the receiver ***,two distinct m.thods,including an integrated one and a decom.osed one,are designed to address the challenges of establishing refueling airspace and allocating tasks for *** m.thods aim.to optim.ze total fuel consum.tion of the receivers and tankers within the aerial refueling scheduling *** optim.zation problem.is established as nonlinear optim.zation m.dels along with *** integrated m.thod seam.essly.com.ines refueling rendezvous point scheduling and tanker task allocation into unified *** has a com.lete solution space and excels in optim.zing total fuel *** decom.osed m.thod,through the separation of rendezvous point scheduling and task allocation,achieves a reduced com.utational ***,this com.s at the cost of sacrificing optim.lity.by.excluding specific feasible ***,num.rical sim.lations are carried out to verify.the feasibility.and effectiveness of the proposed *** sim.lations y.eld insights crucial for the practical engineering application of both the integrated and decom.osed m.thods in real-world *** com.rehensive approach aim. to enhance the efficiency.of forest firefighting operations,m.tigating the risks posed by.forest fires to hum.n life and property.

关键词： Aerial refueling Scheduling Planning Spatial-tem.oral constraint Firefighting

Surface diffraction beam.ine at the SSRF

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Nuclear Science and Techniques 2024年第7期35卷 47-57页

作者： y.e-Liang Gu Xu Zheng xing-m.n Zhang Bin Zhao Guang-Zhi y.n Da-m.ng Zhu y.an-He Sun xing-y. Gao Xiao-Long Li Shanghai Advanced Research Institute Chinese Academy of Sciences239 Zhangheng RoadPudong DistrictShanghai201204China

BL02U2 of the Shanghai Sy.chrotron Radiation Facility.is a surface diffraction beam.ine with a photon flux of 5.5×10^(12) photons/s at 10 keV and a beam.size of 160µm.80µm.at the sam.le *** is dedicated to study.ng surfaces(solid-vacuum.solid-gas)and interfaces(solid-solid,solid-liquid,and liquid-liquid)in nanoscience,condensed m.tter,and soft m.tter sy.tem. using various surface scattering techniques over an energy.range of 4.8-28 keV with transm.ssion and reflection ***,BL02U2 has a high energy.resolution,high angular resolution,and low beam.divergence,which can provide excellent properties for X-ray.diffraction experim.nts,such as grazing incident X-ray.diffraction,X-ray.reflectivity.cry.tal truncation rods,and liquid X-ray.*** of in situ environm.nts can also be provided for the sam.les *** paper describes the setup of the new beam.ine and its applications in various fields.

关键词： Surface and interface Beam.ine Surface diffraction m.crostructure

Effects of environm.nt and genoty.e-by.environm.nt interaction on phenoty.e of Rorippa elata(Brassicaceae),an endem.c alpine plant in the Hengduan m.untains

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Journal of Plant Ecology 2024年第4期17卷 42-55页

作者： Zhi-Qiang Du y.o-Wu xing Ting-Shen Han CAS Key.Laboratory.of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China University.of Chinese Academ.0}of Sciences Beijing 100049China State Key.Laboratory.of Plant Diversity.and Specialty.Crops Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China

Global clim.te change poses a severe threat to m.untain *** plasticity.and local adaptation are two com.on strategies for alpine plant to cope with such *** m.y.facilitate organism.l adaptation to contrasting environm.nts,depending on the influences of the environm.nt or genoty.e or their interacted *** this study.we use an endem.c alpine plant(Rorippa elata)in the Hengduan m.untains(HDm.to unravel its phenoty.ic basis of adaptation strategy.and evaluate the relative contributions of environm.nt and genoty.e to its *** transplanted 37 genoty.es of *** into two com.on gardens across low and high elevations(2800 vs.3800 m.during *** fitness-related traits were m.asured,including flowering probability.and glucosinolates(GS)*** estim.ted the environm.ntal or genoty.ic contributions to the phenoty.e and identified the m.in environm.ntal *** results revealed that both environm.nt and genoty.e-by.environm.nt interactions contributed to the phenoty.es of *** heterogeneity.was identified as a key.factor that explained 24%of the total phenoty.ic *** particular,genoty.es of the northern HDm.showed significantly.higher plasticity.in flowering probability.than those of the southern ***,within the southern HDm.GS content indicated local adaptation to herbivory.stresses for *** genoty.es along *** conclusion,our results suggest that *** m.y.have adapted to the alpine environm.nt through species-level plasticity.or regional-level local *** processes were shaped by.either com.lex topography.or interactions between genoty.e and m.untain *** study.provides em.irical evidence on the adaptation of alpine plants.

关键词： alpine plant com.on garden genoty.e-by.environm.nt Hengduan m.untains local adaptation phenoty.ic plasticity