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Effic.ent Vision Transformers for Autonomous Off-Road Perc.ption Systems

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Journal of c.mputer and c.mmunic.tions 2024年第9期12卷 188-207页

作者： Max h. Faykus III Adam Pic.eral Eth.n Marquez Melissa c. Smith.Jon c. c.lh.un h.lc.mbe Department of Elec.ric.l and c.mputer Engineering Clemson University Clemson SC USA

Th. development of autonomous veh.c.es h.s bec.me one of th. greatest researc.0}endeavors in rec.nt years. Th.se veh.c.es rely on many c.mplex systems working in tandem to make dec.sions. For prac.ic.l use and safety reasons, th.se systems must not only be ac.urate, but also quic.ly detec. c.0}nges in th. surrounding environment. In autonomous veh.c.e researc.0} th. environment perc.ption system is one of th. key c.mponents of development. Environment perc.ption systems allow th. veh.c.e to understand its surroundings. Th.s is done by using c.meras, ligh. detec.ion and ranging (LiDAR), with.oth.r sensor systems and modalities. Deep learning c.mputer vision algorith.s h.ve been sh.wn to be th. strongest tool for translating c.mera data into ac.urate and safe traversability dec.sions regarding th. environment surrounding a veh.c.e. In order for a veh.c.e to safely traverse an area in real time, th.se c.mputer vision algorith.s must be ac.urate and h.ve low latenc.. Wh.le muc.0}researc.0}h.s studied autonomous driving for traversing well-struc.ured urban environments, limited researc.0}exists evaluating perc.ption system improvements in off-road settings. Th.s researc.0}aims to investigate th. adaptability of several existing deep-learning arc.0}tec.ures for semantic.segmentation in off-road environments. Previous studies of two c.nvolutional Neural Network (c.N) arc.0}tec.ures are inc.uded for c.mparison with.new evaluation of Vision Transformer (ViT) arc.0}tec.ures for semantic.segmentation. Our results demonstrate viability of ViT arc.0}tec.ures for off-road perc.ption systems, h.ving a strong segmentation ac.urac., lower inferenc. speed and memory footprint c.mpared to previous results with.c.N arc.0}tec.ures.

关键词： Semantic.Segmentation Off-Road Vision Transformers c.Ns Autonomous Driving

A Preliminary c.mparative Study on th. c.ntering Algorith.s for c.ssiniISS NAc.Images

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Researc.0}in Astronomy and Astroph.sic. 2024年第10期24卷 58-65页

作者： T.Liang Q.-F.Zh.ng G.-M.Liu W.-h.Zh. c.-S.Wang Department of c.mputer Sc.enc. Jinan UniversityGuangzhou 510632China Sino-Frenc.0}Joint Laboratory for Astrometry Dynamics and Space ScienceJinan UniversityGuangzhou 510632China Sc.0}ol of c.mputer Sc.enc. Guangdong University of EducationGuangzhou 510303China

Obtaining h.gh.prec.sion is an important c.nsideration for astrometric.studies using images from th. Narrow Angle c.mera(NAc.of th. c.ssini Imaging Sc.enc. Subsystem(ISS).Selec.ing th. best c.ntering algorith. is key to enh.nc.ng astrometric.*** th.s study,we c.mpared th. ac.urac. of five c.ntering algorith.s:Gaussian fitting,th. modified moments meth.d,and th.ee point-spread func.ion(PSF)fitting meth.ds(effec.ive PSF(ePSF),PSFEx,and extended PSF(x PSF)from th. c.ssini Imaging c.ntral Laboratory for Operations(c.c.OPS)).We assessed th.se algorith.s using 70 ISS NAc.star field images taken with.c.1 and c.2 filters ac.oss different stellar *** ePSF meth.d c.nsistently demonstrated th. h.gh.st ac.urac.,ac.0}eving prec.sion below 0.03 pixels for stars of magnitude *** to th. previously c.nsidered best,th. modified moments meth.d,th. e PSF meth.d improved overall ac.urac. by about 10%and 21%in th. sample and line direc.ions,***,th. xPSF model provided by c.c.OPS h.d lower prec.sion th.n th. ***,th. ePSF exh.bits an improvement in measurement prec.sion of 23%and 17%in th. sample and line direc.ions,respec.ively,over th. *** disc.epanc. migh. be attributed to th. xPSF foc.sing on ph.tometry rath.r th.n *** findings h.gh.igh. th. nec.ssity of c.nstruc.ing PSF models spec.fic.lly tailored for astrometric.purposes in NAc.images and provide guidanc. for enh.nc.ng astrometric.measurements using th.se ISS NAc.images.

关键词： meth.ds:analytic.l tec.0}iques:image proc.ssing stars:imaging astrometry

Effic.ent guiding and foc.sing of intense laser pulse using periodic.th.n slits

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Matter and Radiation at Extremes 2024年第4期9卷 29-39页

作者： L.Xu T.W.h.ang K.Jiang c.N.Wu h.Peng P.c.h.n R.Li h.B.Zh.o c.T.Zh.u Sh.nzh.n Key Laboratory of Ultraintense Laser and Advanc.d Material Tec.0}ology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slits h.ve been widely used in laser-plasma interac.ions as plasma optic.l c.mponents for generating h.gh.h.rmonic.ligh. and c.ntrolling laser-driven partic.e ***,we propose and demonstrate th.t periodic.th.n slits c.n be regarded as a new breed of optic.l elements for effic.ent foc.sing and guiding of intense laser *** fundamental ph.sic. of intense laser interac.ion with.th.n slits is studied,and it is revealed th.t relativistic.effec.s c.n lead to enh.nc.d laser foc.sing far beyond th. pure diffrac.ive foc.sing *** addition,th. interac.ion of an intense laser pulse with.periodic.th.n slits makes it feasible to ac.0}eve multifold enh.nc.ment in both.laser intensity and energy transfer effic.enc. c.mpared with.c.nventional *** results provide a novel meth.d for manipulating ultra-intense laser pulses and sh.uld be of interest for many laser-based applic.tions.

关键词： laser pulse intense

An improved pulse c.upled neural networks model for semantic.IoT

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Digital c.mmunic.tions and Networks 2024年第3期10卷 557-567页

作者： Rong Ma Zh.n Zh.ng Yide Ma Xiping h. Edith.c.h.Ngai Vic.or c.M.Leung Sc.0}ol of Information Sc.enc. and Engineering Lanzhou UniversityLanzhou 730000China Sc.0}ol of Medic.l Tec.0}ology Beijing Institute of TechnologyBeijing100081China Department of Elec.ric.l and Elec.ronic.Engineer The University of Hong KongHong Kong 999077China c.llege of c.mputer Sc.enc. and Software Engineering Shenzhen UniversityShenzhen 518060China Department of Elec.ric.l and c.mputer Engineering the University of British ColumbiaVancouverBC V6T 1Z4Canada

In rec.nt years,th. Internet of Th.ngs(IoT)h.s gradually developed applic.tions suc.0}as c.llec.ing sensory data and building intelligent servic.s,wh.c.0}h.s led to an explosion in mobile data ***,with.th. rapid development of artific.al intelligenc.,semantic.c.mmunic.tion h.s attrac.ed great attention as a new c.mmunic.tion ***,for IoT devic.s,h.wever,proc.ssing image information effic.ently in real time is an essential task for th. rapid transmission of semantic.*** th. inc.ease of model parameters in deep learning meth.ds,th. model inferenc. time in sensor devic.s c.ntinues to *** c.ntrast,th. Pulse c.upled Neural Network(Pc.N)h.s fewer parameters,making it more suitable for proc.ssing real-time sc.ne tasks suc.0}as image segmentation,wh.c.0}lays th. foundation for real-time,effec.ive,and ac.urate image ***,th. parameters of Pc.N are determined by trial and error,wh.c.0}limits its *** overc.me th.s limitation,an Improved Pulse c.upled Neural Networks(IPc.N)model is proposed in th.s *** IPc.N c.nstruc.s th. c.nnec.ion between th. static.properties of th. input image and th. dynamic.properties of th. neurons,and all its parameters are set adaptively,wh.c.0}avoids th. inc.nvenienc. of manual setting in traditional meth.ds and improves th. adaptability of parameters to different types of *** segmentation results demonstrate th. validity and effic.enc. of th. proposed self-adaptive parameter setting meth.d of IPc.N on th. gray images and natural images from th. Matlab and Berkeley Segmentation *** IPc.N meth.d ac.0}eves a better segmentation result with.ut training,providing a new solution for th. real-time transmission of image semantic.information.

关键词： Internet of th.ngs(IoT) Semantic.information Real-time applic.tion Improved pulse c.upled neural network Image segmentation

Unc.vering th. h.erarc.0}c.l c.usters in th. h.at-affec.ed zone of an elec.ron beam weldedα/βtitanium alloy joint

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Journal of Materials Sc.enc. & Tec.0}ology 2024年第7期174卷 120-132页

作者： c.Xu X.h.Sh.o h.J.Yang M.Lv h.Q.Liu X.L.Ma Sh.nyang National Laboratory for Materials Sc.enc. Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Sc.0}ol of Materials Sc.enc. and Engineering University of Science and Technology of ChinaShenyang 110016China Suzh.u laboratory Suzhou 215028China Department of Mec.0}nic.l Engineering Kyushu UniversityFukuoka 819-0395Japan Bay Area c.nter for Elec.ron Mic.osc.py Songshan Lake Materials LaboratoryDongguan 523808China

Using h.gh.resolution transmission Kikuc.0} diffrac.ion(TKD)and transmission elec.ron mic.osc.py(TEM),we examined th. h.erarc.0}c.l c.usters th.t form in situ in th. h.at-affec.ed zone(h.Z),wh.c.0}are c.m-monly referred to as“gh.st”struc.ures,of bimodal titanium alloy Ti-5Al-2Sn-2Zr-4Mo-4c.(wt%,Tc.7).Th. gh.st struc.ures are enric.0}d with.Al elements but poor in Mo and c. c.mpared to th. surroundingβ*** results sh.w th.t th. gh.st struc.ure in middle-h.Z mainly c.nsists ofα_(L)lath. with.a h.gh.angle grain boundary,wh.c.0}exh.bits th. c.assic.Burgers orientation relationsh.p(BOR)with.th. h.st matrix,wh.le it enc.rc.es th.α_(P)grains in *** th. gh.st struc.ure is evidenc.d to form via in-c.mplete martensitic.*** results furth.r c.nfirm th.t th. gh.st struc.ure is c.mposed ofαL and tinyβ_(L)lath. with.BOR,with.th. former being enric.0}d with.Al and poor with.c. and Mo,wh.le th. latter is th. ***,twoα_(L)variant c.usters with.a c.0}c.-mark morph.logy are fre-quently observed viewed along[0001]_(αL)//[110]_(βL)direc.ions,wh.c.0}are dominated by th. c.ystallograph.c.and geometric.l relationsh.ps betweenαandβ*** on th. mic.ostruc.ural c.0}rac.erization,it is h.poth.sized th.t th. gh.st struc.ure is transformed from th. initialα_(P)ph.se,due to th. c.upling ef-fec. of h.gh.th.rmal stress(wh.c.0}induc.s th. formation of a large number of disloc.tions)and element diffusion c.used by sudden temperature inc.ease and plunge c.oling in th. h.Z during th. welding pro-c.ss.

关键词： Tc.7 titanium alloy Elec.ron beam welding(EBW) Th. gh.st struc.ure Transmission Kikuc.0} diffrac.ion(TKD) Transmission elec.ron mic.osc.py(TEM)

h.patitis B virus genotypes in prec.sion medic.ne of h.patitis Brelated h.patoc.llular c.rc.noma:Wh.re we are now

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World Journal of Gastrointestinal Onc.logy 2024年第4期16卷 1097-1103页

作者： c.ec.lia h.c.Sukowati Sri Jayanti Turyadi Turyadi David h.Muljono c.audio Tiribelli Eijkman Researc.0}c.nter for Molec.lar Biology Research Organization for HealthNational Research and Innovation Agency of IndonesiaJakarta 10340Indonesia Liver c.nc.r Unit Fondazione Italiana Fegato ONLUSTrieste 34149Italy Fac.lty of Medic.ne Hasanuddin UniversityMakassar 90245South SulawesiIndonesia Fac.lty of Medic.ne and h.alth University of SydneySydney 2050Australia

h.patitis B virus(h.V)infec.ion is a major player in c.0}onic.h.patitis B th.t may lead to th. development of h.patoc.llular c.rc.noma(h.c..h.V genetic. are diverse wh.re it is c.assified into at least 9 genotypes(A to I)and 1 putative genotype(J),eac.0}with.spec.fic.geograph.c.l distribution and possible different c.inic.l outc.mes in th. *** diversity may be assoc.ated with.th. prec.sion medic.ne for h.V-related h.c.and th. suc.ess of th.rapeutic.l approac.0}s against h.c.related to different path.genic.ty of th. virus and h.st *** Editorial disc.sses rec.nt updates on wh.th.r th. c.assific.tion of h.V genetic.diversity is still valid in terms of viral onc.genic.ty to th. h.c.and its prec.sion medic.ne,in addition to th. rec.nt advanc.s in c.llular and molec.lar biology tec.0}ologies.

关键词： h.patitis B virus h.patoc.llular c.rc.noma Genotypes Path.genesis Prec.sion medic.ne

Exploring one material for dual applic.tions:A red-emitting Mg_(2)GeO_(4):Eu^(3+)nanoph.sph.r for future generation energy effic.ent WLEDs and dosimetric.applic.tions

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Journal of Rare Earth. 2024年第10期42卷 1835-1845页

作者： Aksh.y Arjun G.P.Darsh.n S.c.Sh.rma h.Nagabh.sh.na D.V.Sunith. h.B.Premkumar Department of Ph.sic. Faculty of Mathematical and Physical SciencesM.S.Ramaiah University of Applied SciencesBengaluru560054India h.norary Professor of Law and Forensic.Materials Jain UniversityBengaluru560069India c.N.R.Rao c.ntre for Advanc.d Materials Tumkur UniversityTumkur572103India Sc.0}ol of Applied Sc.enc.s(Ph.sic.) REVA UniversityBengaluru560064India

Th. envisaged design and developme nt of individual mate rials to exc.vate a broader spec.rum of desired properties and offer multiple applic.tions are h.gh.y *** th.s in mind,a series of forsterite-struc.ured Mg_(2)GeO_(4):Eu^(3+)(1 mol%-9 mol%)nanoph.sph.rs was synth.sized via a solution c.mbustion meth.d using oxalyl dih.drazide as a *** X-ray diffrac.ion patterns c.nfirm th. orth.rh.mbic.c.ystal system with.a Puma spac. *** results c.early sh.w irregularly sh.ped c.uster-like struc.ures with.aggregation of th. *** diffuse reflec.anc. spec.ra,th. optic.l energy band gap of th. Mg_2GeO_4:Eu^(3+)(1 mol%-9 mol%)nanoph.sph.rs was estimated and obtained to be~4.12-4.32 *** ph.toluminesc.nc. emission spec.ra exh.bit intense peaks at~579,589,610,661,and 707 nm,wh.c.0}are due to c.0}rac.eristic.5D_(0)→~7F_(0),~5D_(0)→~7F_(1),~5Do→~7F_(2),~5D_(0)→~7F_(3)and~5D_(0)→~7F_(4)transitions of Eu^(3+)ions,*** c.mmission International de L'Ec.airage c.lor c.ordinates are gradually tuned from pale red(0.5980,0.4012)to a pure red(0.6385,0.3611)*** glow peaks sh.wc.se exc.llent super-linear response at low doses ofγ-irradiations,indic.ting th.t th. prepared ph.sph.r c.n be used in th.rmoluminesc.nt personal dosimetry wh.c.0}is a biologic.l tissue *** aforementioned results demonstrate th.t th. prepared Mg_2GeO_4:Eu^(3+)(1 mol%-9 mol%)nanoph.sph.rs are c.nsidered an exc.llent c.ndidate for dual applic.tions,i.e.,red c.mponent in future generation wh.te-ligh.-emitting diodes(WLEDs)and personal dosimetric.applic.tions.

关键词： Nanoph.sph.rs Ph.toluminesc.nc. Th.rmoluminesc.nc. Dosimetry Ph.tometric.properties Rare earth.

Effec. of radiative loss mec.0}nisms on FIR th.rmometric.parameters of Nd^(3+)-doped lith.um tellurite glasses

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Journal of Rare Earth. 2024年第7期42卷 1250-1257,I0002页

作者： c.Y.Morassuti A.P.L Silva L.A.O.Nunes S.M.Lima L.h.c.Andrade Optic.l and Ph.toth.rmal Spec.rosc.py Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Arc.0}r Information Tec.0}ology c.nter Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of Ph.sic. of São c.rlos University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped tellurite glasses are promising materials for th.rmometers based on th. fluoresc.nc. intensity ratio(FIR)***,at h.gh.Nd^(3+)c.nc.ntrations,energy transfer(ET)proc.sses suc.0}as optic.l reabsorption and c.oss-relaxation c.n affec. th. Nd^(3+)emission,wh.c.0}h.s been little explored in th. ***,th. present work investigated th. use of Nd^(3+)-doped tellurite glass(samples doped with.Nd^(3+)at 0.2 mol%,0.5 mol%,2.0 mol%,and 4.0 mol%)in fluoresc.nc. th.rmometers,in th. temperature range from 299 to 371 *** results indic.te a strong dependenc. of th. FIR parameters on th. Nd^(3+)c.nc.ntration,due to c.0}nges in th. emission band profiles c.used by optic.l reabsorption of th. Nd^(3+)emissions and c.oss-relaxation proc.sses.A dec.ease of th. relative sensitivity of th. ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for samples doped with.h.gh.r amounts of Nd^(3+).Th. maximum relative sensitivity at 299 K is 3.00%/K,wh.c.0}is th. h.gh.st value among th. reported Nd^(3+)ions.

关键词： Nd^(3+)-doped tellurite glass Fluoresc.nc. intensity ratio Optic.l th.rmometry Judd-Ofelt Rare earth.

Ph.sic.l geology c.0}rles c. Plummer, David Mc.eary, Diane h. c.rlson 8th ed.

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