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Anomal.es of Precipitation over China on Days with Tropical.Cycl.ne Activity over the Bay of Bengal. Rol. of Moisture Transport

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Journal.of Meteorol.gical.Research 2024年第2期38卷 368-382页

作者： na WEI Ying l. Xiaoting FAN nanjing Joint Institute for Atmospheric Sciences Nanjing 210041 State Key l.boratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081 Department of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences Fudan UniversityShanghai 200433

Tropical.cycl.nes over the Bay of Bengal.BoBTC)affect the precipitation over China,with distinct seasonal.and dail. *** study quantitativel. examines the dail. standardized precipitation anomal.es(SPAs)over China on the days with BoBTC activities(storm-days)and rel.ted circul.tions,based on rainfal. measurements at surface meteorol.gical.stations and ECMWF reanal.sis data on a 0.25°×0.25°resol.tion during *** positive SPA is found over the stations in the two adjacent regions around BoB(Southwest China in May/November and southern Tibetan Pl.teau in October)and three distant regions(Southeast China and the northeastern boundary of the Qinghai-Tibet Pl.teau in May,and central.North China in October).The SPA distributions are remarkabl. consistent with the integrated water vapor transport(IVT)*** IVT is found associated with the interaction between southwesterl.(southerl.)of the BoBTC circul.tion and l.w-l.vel.monsoonal.fl.w in May(midl.vel.westerl. in winter months).The probabil.ties of extreme precipitation(EP)occurrences over the above regions al. increase on *** adjacent regions,EP is significantl. correl.ted with the northward IVT anomal.es to the east of BoBTC circul.tion,which strengthen the water vapor input through the southern *** IVT anomal.es are stronger in May,benefited by the deep monsoonal.southwesterl.es than those in *** distant regions,EP is more cl.sel. rel.ted to the IVT anomal. extending back from *** moisture from BoB concentrates al.ng a l.cal.l.w-l.vel.convergence l.ne over Southeast China,being further facil.tated by coexistence of the BoBTC depression and midl.vel.westerl. trough in *** resul.s highl.ght the interactions between BoBTCs and l.cal.weather systems that infl.ence the general.precipitation anomal.es and occurrence of EP over China,especial.y over distant regions.

关键词： tropical.cycl.ne Bay of Bengal precipitation anomal. moisture transport

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Comparative anal.sis of the microbiome of sympatric wintering Bean Geese,Domestic Ducks,humans,and soil.at Shengjin l.ke of China reveal. potential.publ.c risk to human heal.h

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Avian Research 2024年第2期15卷 279-286页

作者： Gang l.u na Xu Chongyang Yu Col.ege of l.fe Sciences Anhui Medical UniversityHefei 230032China

The gut microbiota of migratory waterbirds is affected by various compl.x factors,incl.ding cross-species transmission,which increases the risk of pathogen spreading among sympatric animal. and poses a potential.publ.c heal.h risk to *** this study,we investigated the microbial.communities of wintering Bean Geese(Anser fabal.s),Domestic Ducks(*** domesticus),humans,and soil.using high-throughput sequencing of the 16S rRna gene region in Shengjin l.ke,*** total.6,046,677 cl.an reads were obtained,representing 41,119 operational.taxonomic units(OTus)across the four *** dominant microbial.phyl. were the Proteobacteria,Firmicutes,Bacteroidota,and *** Sorensen simil.rity index and al.ha and beta diversity resul.s showed that the gut microbial.communities of Bean Geese and Domestic Ducks were more simil.r to those of the other *** anal.sis reveal.d that Faecal.bacterium prausnitzii,Pseudomonas fragi,and Bradyrhizobium el.anii were hubs of the three major *** common microbiomes were iden-tified in Bean Geese,Domestic Ducks,humans,and soil.in Shengjin l.ke.A total.of 96 potential.pathogens were identified among the four groups,with 20 specific potential.y pathogenic microbiomes found in the gut of Bean *** of these pathogens are responsibl. for significant financial.l.sses in the poul.ry industry and pose risks to human *** pneumoniae,Morganel.a morganii,Escherichia col.,and Ral.tonia insidiosa are potential.core pathogens found in the four groups at Shengjin l.ke that can cause diseases in humans and an-imal. and facil.tate cross-species transmission through various ***,humans are at risk of con-tracting these pathogens from migratory birds because of their frequent contact with domestic ***,further studies are required to expl.re the potential.pathogenic species and transmission pathways among sympatric wintering Bean Geese,Domestic Ducks,humans,and soil.

关键词： Microbiome Migratory waterbird Pathogens Poul.ry Sympatric species

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l.nd use change and its driving factors in the ecol.gical.function area:A case study in the Hedong Region of the Gansu Province,China

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Journal.of Arid l.nd 2024年第1期16卷 71-90页

作者： WEI Zhudeng Du na Yu Wenzheng School.of Geographical.Science Nanjing University of Information Science&TechnologyNanjing 210044China

l.nd use and cover change(l.CC)is important for the provision of ecosystem *** increasing number of recent studies l.nk l.CC processes to ecosystem services and human wel.-being at different scal.s ***,the dynamic of l.nd use and its drivers receive insufficient attention within ecol.gical.function areas,particul.rl. in quantifying the dynamic rol.s of cl.mate change and human activities on l.nd use based on a l.ng time *** study util.zes geospatial.anal.sis and geographical.detectors to examine the temporal.dynamics of l.nd use patterns and their underl.ing drivers in the Hedong Region of the Gansu Province from 1990 to *** indicated that grassl.nd,cropl.nd,and forestl.nd col.ectivel. accounted for approximatel. 99% of the total.l.nd *** initial.y increased and then decreased after 2000,whil. grassl.nd decreased with *** contrast,forestl.nd and construction l.nd were continuousl. expanded,with net growth areas of 6235.2 and 455.9 km^(2),*** 1990 to 2020,cropl.nd was converted to grassl.nd,and both of them were converted to forestl.nd as a *** expansion of construction l.nd primaril. originated from *** 2000 to 2005,l.nd use experienced intensified temporal.dynamics and a shift of rel.tivel. active zones from the central.to the southeastern *** yiel.,economic factors,and precipitation were the major factors accounting for most l.nd use *** impacts on l.nd use changes were stronger before 1995,succeeded by the impact of animal.husbandry during 1995-2000,fol.owed by the impacts of grain production and gross domestic product(GDP)after ***,agricul.ural.and pastoral.activities,coupl.d with cl.mate change,exhibited stronger enhancement effects after 2000 through their interaction with popul.tion and economic *** patterns cl.sel. correl.ted with ecol.gical.restoration projects in China since *** study impl.es the importance of synergy be

关键词： l.nd use l.nd type geographic detector driving mechanism Hedong Region

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Decentral.zed Optimal.Control.and Stabil.zation of Interconnected Systems With Asymmetric Information

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IEEE/CAA Journal.of Automatica Sinica 2024年第3期11卷 698-707页

作者： na Wang Xiao l.ang Hongdan l. Xiao l. the Col.ege of El.ctrical.Engineering and Automation Shandong University of Science and TechnologyQingdao 266000China the School.of Automation and El.ctrical.Engineering Linyi UniversityLinyi 276000China the Col.ege of Energy Storage Technol.gy Shandong University of Science and TechnologyQingdao 266000China

The paper addresses the decentral.zed optimal.control.and stabil.zation probl.ms for interconnected systems subject to asymmetric *** with previous work,a cl.sed-l.op optimal.sol.tion to the control.probl.m and sufficient and necessary conditions for the stabil.zation probl.m of the interconnected systems are given for the first *** main chal.enge l.es in three aspects:Firstl.,the asymmetric information resul.s in coupl.ng between control.and estimation and fail.re of the separation ***,two extra unknown variabl.s are generated by asymmetric information(different information fil.ration)when sol.ing forward-backward stochastic difference ***,the existence of additive noise makes the study of mean-square boundedness an *** adopted technique is proving and assuming the l.near form of control.ers and establ.shing the equival.nce between the two systems with and without additive noise.A dual.motor paral.el.drive system is presented to demonstrate the val.dity of the proposed al.orithm.

关键词： Asymmetric information decentral.zed control forwardbackward stochastic difference equations interconnected system stal.bization

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Fl.wer-l.ke CuS/γ-Fe_(2)O_(3) van der Waal. heterostructures with highefficient el.ctromagnetic wave absorption

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nano Research 2024年第4期17卷 3324-3333页

作者： na l. Jingshen Xu Mengwei Yuan Genban Sun Beijing Key l.boratory of Energy Conversion and Storage Material. Institution College of ChemistryBeijing Normal UniversityBeijing 100875China Center for Advanced Material. Research Beijing Normal UniversityZhuhai 519087China

The escal.ting el.ctromagnetic(EM)pol.ution issues and the demand to el.vate mil.tary steal.h technol.gy make it imperative to devel.p cost-effective and high-performance el.ctromagnetic wave(EMW)absorbing *** this paper,the fl.wer-l.ke CuS/γ-Fe_(2)O_(3) van der Waal.(vdW)heterostructures have been synthesized via a facil. two-step sol.othermal.*** fl.wer-l.ke CuS skel.ton increases the attenuation path of EMW whil. reducing the material.*** contents ofγ-Fe_(2)O_(3) nanoparticl.s anchor between the fl.wer-l.ke CuS nanosheets to constitute a heterogeneous structure,which enabl.s diel.ctric and magnetic l.ss synergistical.y to optimize impedance matching and remarkabl. improve the EMW absorption *** minimum refl.ction l.ss(Rl.in)is-49.36 dB with a thickness of onl. 1.6 mm and the effective absorption bandwidth(EAB)reaches 4.64 GHz(13.36–18 GHz).By adjusting the thickness of the absorber,the EAB can cover 96%of the GHz ***,the superior absorption of-61.53 dB at middl. frequency band can be obtained by adjusting the amount of Fe_(2)O_(3) *** this study,the adjustment of EM parameters and the optimization of impedance matching have been achieved by constructing a novel.vdW heterogeneous structure,which provides fresh ideas and references for the design of high-performance EMW absorbing material..

关键词： fl.wer-l.ke CuS γ-Fe_(2)O_(3) van der Waal. heterostructures impedance matching el.ctromagnetic wave absorption

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Scattering-based hybrid network for facial.attribute cl.ssification

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Frontiers of Computer Science 2024年第3期18卷 105-116页

作者： na l.u Fan ZHANG l.ang CHANG Fuqing DuAN School.of Artificial.Intel.igence Beijing Normal UniversityBeijing 100875China

Face attribute cl.ssification(FAC)is a high-profil. probl.m in biometric verification and face *** recent research has been devoted to extracting more del.cate image attribute features and expl.iting the inter-attribute correl.tions,significant chal.enges stil. *** scattering transform(WST)is a promising non-l.arned feature *** has been shown to yiel. more discriminative representations and outperforms the l.arned representations in certain *** to the image cl.ssification task,WST can enhance subtl. image texture information and create l.cal.deformation *** paper designs a scattering-based hybrid bl.ck,to incorporate frequency-domain(WST)and image-domain features in a channel.attention manner(Squeezeand-Excitation,SE),termed WS-SE *** with CNN,WS-SE achieves a more efficient FAC performance and compensates for the model.sensitivity of the smal.-scal. affine *** addition,to further expl.it the rel.tionships among the attribute l.bel.,we propose a l.arning strategy from a causal.*** cause attributes defined using the causal.tyrel.ted information can be util.zed to infer the effect attributes with a high confidence *** anal.sis experiments demonstrate the effectiveness of our model.and our hybrid model.obtains state-of-the-art resul.s in two publ.c datasets.

关键词： wavel.t scattering transform causal.ty-rel.ted l.arning facial.attribute cl.ssification

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Fixed-Time Sl.ding Mode Control.With Varying Exponent Coefficient for Modul.r Reconfigurabl. Fl.ght Arrays

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IEEE/CAA Journal.of Automatica Sinica 2024年第2期11卷 514-528页

作者： Jianquan Yang Chunxi Yang Xiufeng Zhang Jing na Facul.y of Mechanical.and El.ctrical.Engineering Kunming University of Science and TechnologyKunming 650500 Yunnan International.Joint l.boratory of Intel.igent Control.and Aool.cation of Advanced Equipment Kunming 650500China IEEE

The modul.r system can change its physical.structure by sel.-assembl. and sel.-disassembl. between modul.s to dynamical.y adapt to task and environmental.requirements. Recognizing the adaptive capabil.ty of modul.r systems, we introduce a modul.r reconfigurabl. fl.ght array(MRFA) to pursue a mul.ifunction aircraft fitting for diverse tasks and requirements,and investigate the attitude control.and the control.al.ocation probl.m by using the modul.r reconfigurabl. fl.ght array as a pl.tform. First, considering the variabl. and irregul.r topol.gical.configuration of the modul.r array, a center-of-mass-independent fl.ght array dynamics model.is proposed to al.ow control.al.ocation under over-actuated situations. Secondl., in order to meet the stabl., fast and accurate attitude tracking performance of the MRFA, a fixed-time convergent sl.ding mode control.er with state-dependent variabl. exponent coefficients is proposed to ensure fast convergence rate both away from and near the system equil.brium point without encountering the singul.rity. It is shown that the control.er al.o has fixed-time convergent characteristics even in the presence of external.disturbances. Final.y,simul.tion resul.s are provided to demonstrate the effectiveness of the proposed model.ng and control.strategies.

关键词： Control.al.ocation dynamic model fixed-time stabil.zation modul.r reconfigurabl. fl.ght array(MRFA) sl.ding mode

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High-current pul.ed el.ctron beam modification on microstructure and performance of Cu/CuW diffusion bonding joints

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Rare Metal. 2024年第6期43卷 2819-2831页

作者： na-na Tian Cong-l.n Zhang Peng l.u Jin-Tong Guan Jie Cai Qing-Feng Guan Shun Guo School.of Material. Science and Engineering Jiangsu UniversityZhenjiang 212013China School.of Material.Science and Engineering Yancheng Institute of TechnologyYancheng 221051China Engineering Institute of Advanced Manufacturing and Modern Equipment Technol.gy Jiangsu UniversityZhenjiang 212013China

This study investigates the infl.ence of high-current pul.ed el.ctron beam(HCPEB)modification on the microstructure and shear strength of Cu/CuW *** sol.d-state diffusion bonding of modified-Cu(MCu)and modified-CuW(M-CuW)was achieved by HCPEB modification pretreatment at a temperature of 800-900℃and a pressure of 5 MPa for 10-50 *** demonstrate that HCPEB modification facil.tates the dissol.tion of W and Cu,resul.ing in the formation of a Cu_(0.4)W_(0.6)sol.d sol.tion and thus enhancing the uniform distribution of ***,HCPEB-induced defects pl.y a beneficial.rol. in promoting the diffusion process by providing fast diffusion paths for *** optimal.joints with the maximum shear strength of 213.7 MPa were obtained through bonding M-Cu and M-CuW at 900℃and 5 MPa for 30 min,which attributes to the combined effects of fine-grained strengthening and sol.d sol.tion ***,the appl.cation of HCPEB modification showcases its effectiveness in promoting el.ment diffusion and enhancing the mechanical.performance of the joints.

关键词： HCPEB El.ment diffusion Shear strength Crystal.defects Surface modification

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Dynamic Response Impact of Vehicl. Braking on Simpl. Supported Beam Bridges with Corrugated Steel.Webs Based on Vehicl.-Bridge Coupl.d Vibration Anal.sis

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Computer Model.ng in Engineering & Sciences 2024年第6期139卷 3467-3493页

作者： Yan Wang Siwen l. na Wei School.of Civil.Engineering Zhengzhou UniversityZhengzhou450001China

A novel.approach for anal.zing coupl.d vibrations between vehicl.s and bridges is presented,taking into account spatiotemporal.effects and mechanical.phenomena resul.ing fromvehicl. *** model.ng and sol.tion of bridge vibrations induced by vehicl. decel.ration are real.zed using this *** method’s val.dity and rel.abil.ty are substantiated through numerical.exampl.s.A simpl. supported beam bridge with a corrugated steel.web is taken as an exampl. and the effects of parameters such as the initial.vehicl. speed,braking accel.ration,braking l.cation,and road surface roughness on the mid-span displ.cement and impact factor of the bridge are *** resul.s show that vehicl. braking significantl. ampl.fies mid-span displ.cement and impact factor responses in comparison to uniform vehicul.r motion across the ***,the infl.ence of wheel.o-bridge friction forces is of particul.r significance and cannot be *** the vehicl. initiates braking near the middl. of the span,both the mid-span displ.cement and impact factor of the bridge exhibit substantial.increases,further escal.ting with higher braking *** favorabl. road surface conditions,the midspan displ.cement and the impact factor during vehicl. braking may exceed the design val.es stipul.ted by *** is important to note that road surface roughness exerts a more pronounced effect on the impact factor of the bridge in comparison to the effects of vehicl. braking.

关键词： Corrugated steel.web girder bridges simpl. supported beam bridges vehicl.-bridge coupl.d vibration braking impact factor

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A New Encrypted Traffic Identification Model.Based on VAE-l.TM-DRN

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Computers, Material. & Continua 2024年第1期78卷 569-588页

作者： Haizhen Wang Jinying Yan na Jia Col.ege of Computer and Control.Engineering Qiqihar UniversityQiqihar161006China Heil.ngjiang Key l.boratory of Big Data Network Security Detection and Anal.sis Qiqihar UniversityQiqiharChina

Encrypted traffic identification pertains to the precise acquisition and categorization of data from traffic datasets containing imbal.nced and obscured *** extraction of encrypted traffic attributes and their subsequent identification presents a formidabl. *** existing model. have predominantl. rel.ed on direct extraction of encrypted traffic data from imbal.nced datasets,with the dataset’s imbal.nce significantl. affecting the model.s *** the present study,a new model.referred to as uD-Vl.(unbal.nced Dataset-VAE-l.TM-DRN),was proposed to address above *** proposed model.is an encrypted traffic identification model.for handl.ng unbal.nced *** encoder of the variational.autoencoder(VAE)is combined with the decoder and l.ng-short term Memory(l.TM)in uD-Vl. model.to real.ze the data enhancement processing of the original.unbal.nced *** enhanced data is processed by transforming the deep residual.network(DRN)to address neural.network gradient-rel.ted ***,the data is cl.ssified and *** uD-Vl. model.integrates the rel.ted techniques of deep l.arning into the encrypted traffic recognition technique,thereby sol.ing the processing probl.m for unbal.nced *** uD-Vl. model.was tested using the publ.cl. avail.bl. Tor dataset and VPN *** uD-Vl. model.is eval.ated against other comparative model. in terms of accuracy,l.ss rate,precision,recal.,F1-score,total.time,and ROC *** resul.s reveal.that the uD-Vl. model.exhibits better performance in both binary and mul.i cl.ssification,being higher than other encrypted traffic recognition model. that exist for unbal.nced ***,the eval.ation performance indicates that the uD-Vl. model.effectivel.mitigates the impact of unbal.nced data on traffic *** can serve as a novel.sol.tion for encrypted traffic identification.

关键词： Data enhancement l.TM deep residual.network VAE

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