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weakly.Supervised Object Localization with.Background Suppression Erasing for Art Auth.ntication and Copy.igh. Protection

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Mach.ne Intelligence Research 2024年第1期21卷 89-103页

作者： Ch.ojie wu Mingy.ng Li y.ng Gao Xiny.n Xie w.ng w.y.ng Ah.ad Musy.fa Sch.ol of Computer Science and Engineering South China University of TechnologyGuangzhou 511442China Guangdong Provincial Key.Laboratory.of Artificial Intelligence in Medical Image Analy.is and Application Guangdong Provincial People's HospitalGuangzhou 510180China

Th. problem of art forgery.and infringement is becoming increasingly.prominent,since diverse self-media contents with.all kinds of art pieces are released on th. Internet every.*** art paintings,object detection and localization provide an efficient and ef-fective means of art auth.ntication and copy.igh. ***,th. acquisition of a precise detector requires large amounts of ex-pensive pixel-level *** alleviate th.s,we propose a novel weakly.supervised object localization(wSOL)with.background su-perposition erasing(BSE),wh.ch.recognizes objects with.inexpensive image-level ***,integrated adversarial erasing(IAE)for vanilla convolutional neural network(CNN)dropouts th. most discriminative region by.leveraging h.gh.level semantic ***,a background suppression module(BSM)limits th. activation area of th. IAE to th. object region th.ough.a self-guidance ***,in th. inference ph.se,we utilize th. refined importance map(RIM)of middle features to obtain class-agnostic loc-alization *** experiments are conducted on paintings,CUB-200-2011 and ILSVRC to validate th. effectiveness of our BSE.

关键词： weakly.supervised object localization erasing meth.d deep learning computer vision art auth.ntication and copy.igh. protection

Microstructure evolution and sh.pe memory.beh.viors of Ni_(47)Ti_(44)Nb_(9)alloy.subjected to multistep th.rmomech.nical loading with.different prestrain levels

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Journal of Materials Science & Tech.ology 2024年第4期171卷 80-93页

作者： y.h.Zh.ng h.Li Z.w.y.ng X.Liu Q.F.Gu State Key.Laboratory.of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Sh.anxi Key.Laboratory.of h.gh.Performance Precision Forming Tech.ology.and Equipment Northwestern Polytechnical UniversityXi’an 710072China

Ni_(47)Ti_(44)Nb_(9)sh.pe memory.alloy.SMA)is a promising material in th. aerospace field due to its wide transformation *** application of sh.pe memory.effect depends on multistep th.rmomech.n-ical loading,viz.,low-temperature deformation and subsequent h.ating to ***-temperature deformation prestrain play. a pivotal role in sh.pe memory.properties tailoring of SMA ***,microstructure evolution and deformation mech.nisms of Ni_(47)Ti_(44)Nb_(9)SMA subjected to vari-ous prestrain levels are still *** th.s end,microstructure evolution and sh.pe memory.beh.viors of Ni_(47)Ti_(44)Nb_(9)alloy.subjected to multistep th.rmomech.nical loading with.prestrain levels of 8%-16%at-28℃(M_(s)+30℃)were *** results demonstrate th.t th. stress-strain curve of th. specimen exh.bits four distinct stages at a maximal prestrain of 16%.wh.reas stageⅡand stageⅢend at prestrains of∼8%and∼12%,*** stageⅡ,th. stress-induced martensitic transformation is accompanied by.th. dislocation slip of th. NiTi matrix andβ-Nb *** stageⅢ,in addition to th. h.gh.r density.of dislocations and furth.r growth.of stress-induced martensite variants(SIMVs),(001)compound twins are introduced as a result of th.(001)deformation twinning in stress-induced ***{20-1}martensite twins are gradually.introduced in stageⅣ.Correspondingly.after subsequent unloading and h.ating,a h.gh.r density.of{114}austenite twins form in th. specimen with.a larger prestrain of 16%.with.increasing prestrain from 8%to 16%,th. recoverable strainε_(re)^(T)upon h.ating increases first and th.n ***ε_(re)^(T)obtains a maximum of 7.03%at 10%prestrain and de-creases to 6.17%at 16%*** increase ofε_(re)^(T)can be attributed to th. formation of new SIMVs,th. furth.r growth.of existing SIMVs,and th. recoverable(001)compound *** th. decrease ofε_(re)^(T)is mainly.associated with.th. irrecoverable strain by.20−1}martensite *** effe

关键词： Ni_(47)Ti_(44)Nb_(9)sh.pe memory.alloy wide transformation h.steresis Th.rmomech.nical loading Microstructure evolution Sh.pe memory.beh.viors Stress-induced martensitic transformation Deformation twinning

Rational design of AgGaS/ZnS/ZnS quantum dots with.a near-unity.ph.toluminescence quantum y.eld via double sh.lling sch.me

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Journal of Materials Science & Tech.ology 2024年第2期169卷 235-242页

作者： h.X.Lu h.Liu Z.Z.Fu y.y.Ch.n h.Q.Dai Z.h. w.L.Zh.ng R.Q.Guo Institute for Electric Ligh. Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future Ligh.ing Academy for Engineering and TechnologyFudan UniversityShanghai 200433China y.wu Research.Institute of Fudan University YiwuZhejiang 322000China Zh.ngsh.n-Fudan Joint Innovation Center Zhongshan 528437China

In th.s study.a two-step meth.d was used to sy.th.size h.gh.y.luminescent AgGaS/ZnS/ZnS quantum dots(QDs).In th. first step,an inner ZnS sh.ll was formed via a one-pot meth.d,wh.ch.resulted in a smaller lattice mismatch.between th. AgGaS core and th. outer ZnS sh.ll,th.reby.facilitating th. formation of a th.ck outer *** th. two-step sh.lling process,th. sy.th.sized AgGaS/ZnS/ZnS QDs sh.wed an excellent ph.toluminescence quantum y.eld(PLQy.of 96.4%with.a peak wavelength.of 508 nm,repre-senting th. h.gh.st PLQy.reported th.s far for AgGaS ***,th. effect of h.logen ions in Zn precursors on th. sh.lling process was *** was proposed th.t th. capacity.of h.logen ions to coordinate with.th. QDs influenced th. balance between Zn cation diffusion and ZnS sh.lling ***,th. ZnS sh.lling reaction was dominant wh.n ZnCl_(2)was employ.d,wh.le Zn cation diffusion was th. dominant process under th. I^(−)-rich.*** work provides insigh.s into th. interfacial restructuring during th. ZnS sh.lling and offers a clear map for th. tailored sy.th.sis of core/sh.ll QDs.

关键词： AgGaS Quantum dots Ph.toluminescence Core/sh.ll Alloy.d core/sh.ll interface

Single-pilot operations in commercial fligh.:Effects on neural activity.and visual beh.viour under abnormalities and emergencies

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Ch.nese Journal of Aeronautics 2024年第8期37卷 277-292页

作者： Qinbiao LI Ch.n-h.ien Ch.N Kam K.h.ng Xin y.AN Ch. y.n y.U h.man Factors and Ergonomics Laboratory Department of Aeronautical and Aviation EngineeringThe Hong Kong Polytechnic UniversityHong Kong Special Administrative Region 100872China Sch.ol of Mech.nical&Aerospace Engineering Nanyang Technological UniversitySingapore 639798Singapore

with.cutting-edge tech.ologies and considering airline h.man-resource-saving,a single pilot in commercial jets could be tech.ically.*** ch.nges in captains’natural beh.viours are initially.required to compreh.nd th. specific safe h.man performance envelope for safeguarding single-pilot fligh.,particularly.in h.gh.risk *** paper investigates h.w captains’performance transforms for fixing emergencies wh.n operating from Dual-Pilot Operations(DPO)to Single-Pilot Operations(SPO)th.ough.a ph.siological-based *** pilots flew an emergency.included fligh. with.with.ut first officers’*** neural activities and scanning beh.viours were recorded using a 32-ch.nnel Electroenceph.logram(EEG)and glasses-based ey. tracker,with.th. observation and post-experiment questionnaires to evaluate th. fligh. operations and pilots’*** alone,th.re was a significantly.increased cortical activity.in h.and b waves over th. frontal,parietal,and temporal lobes during th. more complicated emergencies,and pilots focused less on th. primary.fligh. display.wh.le spending significantly.more time scanning th. oth.r *** ph.siological fluctuating patterns associated with.risky.operations in SPO were h.gh.igh.ed by.cross-correlating multimodal *** experimental-based noteworth. insigh.s may.wish.to inform commercial SPO measures to lessen th. persistent ph.siological fluctuation,assisting airlines in creating SPO-oriented intelligent fligh. sy.tems to give captains adequate support for assuring safer air transportation.

关键词： Aviation engineering Single pilot operations Beh.viour ch.nges Ey. tracker Electroenceph.logram

Jetting-based bioprinting:process,dispense ph.sics,and applications

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Bio-Design and Manufacturing 2024年第5期7卷 771-799页

作者： wei Long ng Viktor Sh.olnikov Singapore Centre for 3D Printing(SC3DP) School of Mechanical and Aerospace EngineeringNanyang Technological University(NTU)Singapore 639798Singapore h. Inc. Palo AltoCA 94304USA

Jetting-based bioprinting facilitates contactless drop-on-demand deposition of subnanoliter droplets at well-defined positions to control th. spatial arrangement of cells,growth.factors,drugs,and biomaterials in a h.gh.y.automated lay.r-by.lay.r fabrication *** to its immense versatility.jetting-based bioprinting h.s been used for various applications,including tissue engineering and regenerative medicine,wound h.aling,and drug development.A lack of in-depth.understanding exists in th. processes th.t occur during jetting-based *** review paper will compreh.nsively.discuss th. ph.sical considerations for bioinks and printing conditions used in jetting-based *** first present an overview of different jetting-based bioprinting tech.iques such.as inkjet bioprinting,laser-induced forward transfer bioprinting,electroh.drody.amic jet bioprinting,acoustic bioprinting and microvalve ***,we provide an in-depth.discussion of various considerations for bioink formulation relating to cell deposition,print ch.mber design,droplet formation and droplet ***,we h.gh.igh. recent accomplish.ents in jetting-based *** present th. advantages and ch.llenges of each.meth.d,discuss considerations relating to cell viability.and protein stability.and conclude by.providing insigh.s into future directions of jetting-based bioprinting.

关键词： 3D bioprinting Biofabrication Jetting-based Dispense ph.sics Mach.ne learning

Effect of Eu3+,Bi3+,and Li+ doping on luminescent property.of GdNbO4

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Journal of Rare Earth. 2024年第1期42卷 66-75页

作者： S.w.wi y.S.Lee Department of Ph.sics and Integrative Institute of Basic Sciences Soongsil University

we investigated th. emission properties of Eu3+-doped GdNbO4-based oxide ph.sph.rs,aiming at improving th. Eu3+emission by.codoping of Bi3+and Li+.Eu3+singly.doped,Eu3+and Bi3+doubly.doped,and Eu3+,Bi3+,and Li+triply.doped GdNbO4were prepared using a h.gh.temperature solid-state reaction *** red-orange emissions from Eu3+in th. singly.doped samples are significantly.improved by.th. codoping of Bi3+,mainly.due to th. energy.transfer from Bi3+to Eu3+.Th. additional codoping of Li+is found to increase th. Eu3+emission *** improvement migh. be attributed to th. increase in th. ph.toluminescent quantum y.eld originating from larger grain sizes and better cry.tallinity.A detailed analy.is of th. X-ray.diffraction pattern and th. asy.metric ratio estimated from th. ph.toluminescence spectra sh.w th.t th. local lattice environment around Eu3+in GdNbO4does not ch.nge significantly.with.th. codoping of Bi3+and Li+.Our results indicate th.t Li+doping is a promising way.to improve th. emission properties of rare-earth.ion-doped GdNbO4ph.sph.rs.

关键词： Eu 3+ GdNbO 4 Codoping of Li + Ph.toluminescence Sensitizer Rare earth.

Dy.function of sy.aptic endocy.ic trafficking in Parkinson's disease

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Neural Regeneration Research 2024年第12期19卷 2649-2660页

作者： Xin y. ng Mian Cao Programme in Neuroscience and Beh.vioural Disorders Duke-NUS Medical SchoolSingaporeSingapore Department of Ph.siology National University of SingaporeSingaporeSingapore

Parkinson's disease is ch.racterized by.th. selective degeneration of dopamine neurons in th. nigrostriatal path.ay.and dopamine deficiency.in th. *** precise reasons beh.nd th. specific degeneration of th.se dopamine neurons remain largely.*** investigations h.ve identified over 20 causative PARK genes and 90 genomic risk loci associated with.both.familial and sporadic Parkinson's ***,several of th.se genes are linked to th. sy.aptic vesicle recy.ling process,particularly.th. clath.inmediated endocy.osis *** suggests th.t impaired sy.aptic vesicle recy.ling migh. represent an early.feature of Parkinson's disease,followed by.axonal degeneration and th. eventual loss of dopamine cell bodies in th. midbrain via a"dy.ng back"***,several new animal and cellular models with.Parkinson's disease-linked mutations affecting th. endocy.ic path.ay.h.ve been created and extensively.*** models faith.ully.recapitulate certain Parkinson's disease-like features at th. animal,circuit,and cellular levels,and exh.bit defects in sy.aptic membrane trafficking,furth.r supporting th. findings from h.man genetics and clinical *** th.s review,we will first summarize th. cellular and molecular findings from th. models of two Parkinson's disease-linked clath.in uncoating proteins:auxilin(DNAJC6/PARK19)and sy.aptojanin 1(Sy.J1/PARK20).Th. mouse models carry.ng th.se two PARK gene mutations ph.nocopy.each.oth.r with.specific dopamine terminal path.logy.and display.a potent sy.ergistic ***,we will delve into th. involvement of several clath.in-mediated endocy.osis-related proteins(GAK,endoph.lin A1,SAC2/INPP5 F,sy.aptotagmin-11),identified as Parkinson's disease risk factors th.ough.genome-wide association studies,in Parkinson's disease *** will also explore th. direct or indirect roles of some common Parkinson's disease-linked proteins(alph.-sy.uclein(PARK1/4),Parkin(PARK2),and LRRK2(PARK

关键词： autoph.gy auxilin/PARK19 clath.in-mediated endocy.osis dopamine neurons neurodegeneration nigrostriatal path.ay Parkinson's disease sy.aptic vesicle recy.ling sy.aptojanin1/PARK20

Th. quasi-Gramian solution of a non-commutative extension of th. h.gh.r-order nonlinear Sch.?dinger equation

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Communications in Th.oretical Ph.sics 2024年第3期76卷 51-61页

作者： h.w A Riaz J Lin Department of Ph.sics Zhejiang Normal UniversityJinhua 321004China

Th. nonlinear Sch.?dinger(NLS)equation,wh.ch.incorporates h.gh.r-order dispersive terms,is widely.employ.d in th. th.oretical analy.is of various ph.sical *** th.s study.we explore th. non-commutative extension of th. h.gh.r-order NLS *** treat real or complex-valued functions,such.as g_(1)=g_(1)(x,t)and g_(2)=g_(2)(x,t)as non-commutative,and employ.th. Lax pair associated with.th. evolution equation,as in th. commutation *** derive th. quasi-Gramian solution of th. sy.tem by.employ.ng a binary.Darboux *** soliton solutions are presented explicitly.with.n th. framework of *** visually.understand th. dy.amics and solutions in th. given example,we also provide simulations illustrating th. associated ***,th. solution can be used to study.th. stability.of plane waves and to understand th. generation of periodic patterns with.n th. context of modulational instability.

关键词： integrable sy.tems Darboux transformation solitons

Low-rank matrix recovery.with.total generalized variation for defending adversarial examples

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Frontiers of Information Tech.ology.& Electronic Engineering 2024年第3期25卷 432-445页

作者： wen LI h.ngy.u w.ng Lianzh. h.O Qiang h. Linlin Ch.N Zh.quan h. w.ng w.y.ng Sch.ol of Science Beijing University of Civil Engineering and ArchitectureBeijing 100044China Sch.ol of Computer Science and Engineering South China University of TechnologyGuangzhou 510006China Aerospace Information Research.Institute Chinese Academy of SciencesBeijing 100094China Guangdong Key.Laboratory.of Intelligent Information Processing Shenzhen 518060China Institute of Big Data Modeling and Tech.ology Beijing University of Civil Engineering and ArchitectureBeijing 100044China

Low-rank matrix decomposition with.first-order total variation(TV)regularization exh.bits excellent performance in exploration of image *** advantage of its excellent performance in image denoising,we apply.it to improve th. robustness of deep neural ***,alth.ugh.TV regularization can improve th. robustness of th. model,it reduces th. accuracy.of normal samples due to its *** our work,we develop a new low-rank matrix recovery.model,called LRTGV,wh.ch.incorporates total generalized variation(TGV)regularization into th. reweigh.ed low-rank matrix recovery.*** th. proposed model,TGV is used to better reconstruct texture information with.ut *** reweigh.ed nuclear norm and Li-norm can enh.nce th. global structure ***,th. proposed LRTGV can destroy.th. structure of adversarial noise wh.le re-enh.ncing th. global structure and local texture of th. *** solve th. ch.llenging optimal model issue,we propose an algorith. based on th. alternating direction meth.d of *** results sh.w th.t th. proposed algorith. h.s a certain defense capability.against black-box attacks,and outperforms state-of-th.-art low-rank matrix recovery.meth.ds in image restoration.

关键词： Total generalized variation Low-rank matrix Alternating direction meth.d of multipliers Adversarial example