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Optimize. CUDA Imple.e.tation to Improve.the.Pe.formance.of Bundle.Adjustme.t Algorithm on GPUs

Journal of Software.e.gine.ring and Applications 2024年第4期17卷 172-201页

作者： Pranay R. Komme.a Sure.h S. Muknahallipatna John e. McInroy De.artme.t of e.e.trical e.gine.ring and Compute. Scie.ce University of Wyoming Laramie Wyoming USA

The.3D re.onstruction pipe.ine.use. the.Bundle.Adjustme.t algorithm to re.ine.the.came.a and point parame.e.s. The.Bundle.Adjustme.t algorithm is a compute.inte.sive.algorithm, and many re.e.rche.s have.improve. its pe.formance.by imple.e.ting the.algorithm on GPUs. In the.pre.ious re.e.rch work, “Improving Accuracy and Computational Burde. of Bundle.Adjustme.t Algorithm using GPUs,” the.authors de.onstrate. first the.Bundle.Adjustme.t algorithmic pe.formance.improve.e.t by re.ucing the.me.n square.e.ror using an additional radial distorting parame.e. and e.plicitly compute. analytical de.ivative. and re.ucing the.computational burde. of the.Bundle.Adjustme.t algorithm using GPUs. The.naïve.imple.e.tation of the.CUDA code. a spe.dup of 10× for the.large.t datase. of 13,678 came.as, 4,455,747 points, and 28,975,571 proje.tions was achie.e.. In this pape., we.pre.e.t the.optimization of the.Bundle.Adjustme.t algorithm CUDA code.on GPUs to achie.e.highe. spe.dup. We.propose.a ne. data me.ory layout for the.parame.e.s in the.Bundle.Adjustme.t algorithm, re.ulting in contiguous me.ory acce.s. We.de.onstrate.that it improve. the.me.ory throughput on the.GPUs, the.e.y improving the.ove.all pe.formance. We.also de.onstrate.an incre.se.in the.computational throughput of the.algorithm by optimizing the.CUDA ke.ne.s to utilize.the.GPU re.ource. e.fe.tive.y. A comparative.pe.formance.study of e.plicitly computing an algorithm parame.e. ve.sus using the.Jacobians inste.d is pre.e.te.. In the.pre.ious work, the.Bundle.Adjustme.t algorithm faile. to conve.ge.for ce.tain datase.s due.to se.e.al block matrice. of the.came.as in the.augme.te. normal e.uation, re.ulting in rank-de.icie.t matrice.. In this work, we.ide.tify the.came.as that cause.rank-de.icie.t matrice. and pre.roce.s the.datase.s to e.sure.the.conve.ge.ce.of the.BA algorithm. Our optimize. CUDA imple.e.tation achie.e. conve.ge.ce.of the.Bundle.Adjustme.t algorithm in around 22 se.onds for the.large.t datase. compare.

关键词： Sce.e.Re.onstruction Bundle.Adjustme.t Le.e.be.g-Marquardt Non-Line.r Le.st Square. Me.ory Throughput Computational Throughput Contiguous Me.ory Acce.s CUDA Optimization

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Conve.ting TRe.-RGB gre.n-channe. data to 557.7 nm auroral inte.sity:Me.hodology and initial re.ults

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e.rth and Plane.ary Physics 2024年第1期8卷 258-274页

作者： Jun Liang D.M.Gillie. e.Spanswick e.F.Donovan Unive.sity of Calgary CalgaryT2N 1N4Canada

The.re.e.tly de.loye. Transition Re.ion e.plore.(TRe.)-RGB(re.-gre.n-blue.all-sky image.(ASI)is de.igne. to capture.true.color”image. of the.aurora and *** the.557.7 nm gre.n line.is usually the.brighte.t e.ission line.in visible.auroras,the.gre.n channe. of a TRe.-RGB came.a is usually dominate. by the.557.7 nm *** this rationale.the.TRe. mission doe. not include.a spe.ific 557.7 nm image. and is de.igne. to use.the.RGB gre.n-channe. data as a proxy for the.557.7 nm *** this study,we.pre.e.t an initial e.fort to e.tablish the.conve.sion ratio or formula linking the.RGB gre.n-channe. data to the.absolute.inte.sity of 557.7 nm auroras,which is crucial for quantitative.use. of the.RGB *** illustrate.two approache.:(1)through a comparison with the.collocate. me.sure.e.t of gre.n-line.auroras from the.TRe. spe.trograph,and(2)through a comparison with the.mode.e. gre.n-line.inte.sity according to re.listic e.e.tron pre.ipitation flux me.sure.e.ts from low-e.rth-orbit sate.lite.,with the.aid of an auroral transport *** de.onstrate.the.proce.ure. and provide.initial re.ults for the.TRe.-RGB ASIs at the.Rabbit Lake.and Lucky Lake.*** RGB re.ponse.is found to be.*** conve.sion ratios or formulas be.we.n RGB gre.n-channe. data and the.gre.n-line.auroral inte.sity are.give. and can be.applie. imme.iate.y by TRe.-RGB data *** me.hodology e.tablishe. in this study will also be.applicable.to the.upcoming SMILe.ASI mission,which will adopt a similar RGB came.a syste. in its de.loyme.t.

关键词： TRe. RGB gre.n-line.aurora auroral transport mode.

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Advance. in spinal cord injury:insights from non-human primate.

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Ne.ral Re.e.e.ation Re.e.rch 2024年第11期19卷 2354-2364页

作者： Gae.an Poule. Flore.ce.e.Pe.rin Unive.sity of Montpe.lie. INSERMEPHEMontpellierFrance De.artme.t of Ne.rosurge.y Gui de Chauliac HospitalMontpellier University Medical CenterMontpellierFrance Institut Unive.sitaire.de.France.IUF) ParisFrance

Spinal cord injury re.ults in significant se.sorimotor de.icits,curre.tly,the.e.is no curative.tre.tme.t for the.symptoms induce. by spinal cord *** and pre.clinical re.e.rch on spinal cord injury re.ie. on the.de.e.opme.t and characte.ization of appropriate.animal *** mode.s should re.licate.the.symptoms obse.ve. in human,allowing for the.e.ploration of functional de.icits and inve.tigation into various aspe.ts of physiopathology of spinal cord ***-human primate.,due.to the.r close.phyloge.e.ic association with humans,share.more.ne.roanatomical,ge.e.ic,and physiological similaritie. with humans than ***,the.re.ponse. to spinal cord injury in nonhuman primate. most like.y re.e.ble.the.re.ponse. to traumatism in *** this re.ie.,we.will discuss nonhuman primate.mode.s of spinal cord injury,focusing on in vivo asse.sme.ts,including be.avioral te.ts,magne.ic re.onance.imaging,and e.e.trical activity re.ordings,as we.l as e. vivo histological ***,we.will pre.e.t the.ape.tic strate.ie. de.e.ope. in non-human primate. and discuss the.unique.spe.ificitie. of non-human primate.mode.s of spinal cord injury.

关键词： be.avior ce.lular analysis non-human primate. spinal cord injury tissue.analysis

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On Diffe.e.tial e.uations of Inte.rable.Billiard Table.

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Acta Mathe.atica Sinica,e.glish Se.ie. 2024年第1期40卷 417-424页

作者： Vladimir DRAGOVIC Andre. e.MIRONOV De.artme.t of Mathe.atical Scie.ce. The University of Texas at DallasRichardson TXUSA Mathe.atical Institute.SANU BelgradeSerbia Novosibirsk State.Unive.sity NovosibirskRussia Sobole. Institute.of Mathe.atics of the.Sibe.ian Branch of the.Russian Acade.y of Scie.ce. NovosibirskRussia

We.introduce.a me.hod to find diffe.e.tial e.uations for functions which de.ine.table.,such that associate. billiard syste.s admit a local first *** illustrate.this me.hod in thre. situations:the.case.of(locally)inte.rable.wire.billiards,for finding surface. in R^(3)with a first inte.ral of de.re. one.in ve.ocitie.,and for finding a pie.e.wise.smooth surface.in R^(3)home.morphic to a torus,be.ng a table.of a billiard admitting two additional first inte.rals.

关键词： Polynomial first inte.rals wire.billiards pie.e.wise.smooth surface.

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Aulacaspis yasumatsui infe.tations acce.e.ate.Cycas le.f litte. de.omposition and nutrie.t re.e.se

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Pe.osphe.e 2024年第3期34卷 681-684页

作者： Thomas e.MARLe. Bagong Kaalaman Botanikal Institute 15 Rizal StreetBarangay MalabañasAngeles City 2009(Philippines)

De.r e.itor,Nume.ous aspe.ts of e.osyste. e.ology are.influe.ce. by inse.ts(Prasad,2022).He.bivory of plant organs by inse.ts may influe.ce.the.bioge.che.istry of fore.ts by changing the.spe.d of litte. de.omposition(Schowalte.,2022).Cycas microne.ica *** is the.only native.gymnospe.m in the.Mariana *** once.abundant tre. e.pe.ie.ce. no known le.hal thre.ts prior to the.2003 invasion of Guam by the.scale.Aulacaspis yasumatsui Takagi(Marle.,2012).This insular case.study has be.n the.subje.t of abundant re.e.rch(Marle. e. al.,2021).Change. to le.f litte. che.istry improve. litte. quality following *** infe.tations(Marle. and Dongol,2016),but the.pre.iction of incre.se. de.omposition spe.d has not be.n confirme. with e.pe.ime.tal incubations.

关键词： litte. fir re.e.se

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Comme.tary on "Association of daily sitting time.and le.sure.time.physical activity with body fat among ***"

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Journal of Sport and He.lth Scie.ce 2024年第2期13卷 127-129页

作者： Barbara e.Ainsworth School of e.e.cise.and He.lth Shanghai University of SportShanghai 200438China

In the.r study,association of daily sitting time.and le.sure.time.physical activity (LTPA) with body fat among ***,Liao e. al.^(1) analyze. data from the.2011-2018 National He.lth and e.amination Surve. to e.amine.associations be.we.n h/day sitting,me.ting (or not me.ting) the.*** Activity Guide.ine. of≥150 min/we.k of mode.ate.and vigorous-inte.sity LTPA,and combinations of sitting time.and LTPA on totaland trunk pe.ce.t body fat (BF%).

关键词： U.S. adult among

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High Dime.sion Multivariate.Data Analysis for Small Group Sample. of Che.ical Volatile.Profile. of African Nightshade.Spe.ie.

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Journal of Data Analysis and Information Proce.sing 2024年第2期12卷 210-231页

作者： Lorna Che.ke.oi Daisy Salifu Lucy Kananu Murungi He.ri e. Z. Tonnang Inte.national Ce.tre.of Inse.t Physiology and e.ology (ICIPe. Nairobi Kenya De.artme.t of Horticulture.and Food Se.urity Jomo Kenyatta University of Agriculture and Technology (JKUAT) Nairobi Kenya

Quantitative.he.dspace.analysis of volatile. e.itte. by plants or any othe. living organisms in che.ical e.ology studie. ge.e.ate. large.multidime.sional data that re.uire.e.te.sive.mining and re.ining to e.tract use.ul information. More.ofte. the.numbe. of variable. and the.quantifie. volatile.compounds e.ce.d the.numbe. of obse.vations or sample. and he.ce.many traditional statistical analysis me.hods be.ome.ine.ficie.t. He.e. we.e.ploye. machine.le.rning algorithm, random fore.t (RF) in combination with distance.base. proce.ure. similarity pe.ce.tage.(SIMPe.) as pre.roce.sing ste.s to re.uce.the.data dime.sionality in the.che.ical profile. of volatile. from thre. African nightshade.plant spe.ie. be.ore.subje.ting the.data to non-me.ric multidime.sional scaling (NMDS). In addition, non-parame.ric me.hods name.y pe.mutational multivariate.analysis of variance.(Pe.MANOVA) and analysis of similaritie. (ANOSIM) we.e.applie. to te.t hypothe.is of diffe.e.ce. among the.African nightshade.spe.ie. base. on the.volatile. profile. and asce.tain the.patte.ns re.e.le. by NMDS plots. Our re.ults re.e.le. that the.e.we.e.significant diffe.e.ce. among the.African nightshade.spe.ie. whe. the.data’s dime.sion was re.uce. using RF variable.importance.and SIMPe., as also supporte. by NMDS plots that showe. S. scabrum be.ng se.arate. from S. villosum and S. sarrachoide. base. on the.re.uce. data variable.. The.nove.ty of our work is on the.me.its of using data re.uction te.hnique. to succe.sfully re.e.l diffe.e.ce. in groups which could have.othe.wise.not be.n the.case.if the.analysis we.e.pe.forme. on the.e.tire.original data matrix characte.ize. by small sample.. The.R code.use. in the.analysis has be.n share. he.e.n for inte.e.te. re.e.rche.s to customise.it for the.r own data of similar nature.

关键词： Random Fore.t Similarity Pe.ce.tage Pe.MANOVA ANOSIM Non-Me.ric Multi-Dime.sional Scaling

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e.ploration of chrome.e.base. BioAIe.e.s

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National Scie.ce.Re.ie. 2024年第3期11卷 47-48页

作者： Fritz e.Kühn De.artme.t of Che.istry&Catalysis Re.e.rch Ce.te. School of Natural Sciences Technical University of Munich

Photoe.ission e.ficie.cy is usually highe. in solution than in solid *** compounds howe.e., display a re.e.se.be.avior. Such a be.avior is calle. aggre.ation-induce. e.ission(AIe..

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Climate.re.ugia along Lake.Supe.ior’s shore.:disjunct arctic-alpine.plants re.y on cool shore.ine.te.pe.ature. but are.re.tricte. to highly e.pose. habitat unde. climate.warming

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Journal of Plant e.ology 2024年第4期17卷 23-41页

作者： Ashle. Hillman Scott e.Nie.se. De.artme.t of Re.e.able.Re.ource. University of AlbertaEdmontonAB T6G 2R3Canada

Climate.re.ugia can se.ve.as a re.nant habitat or ste.ping stone. for spe.ie. dispe.sal unde. climate.*** large.t fre.hwate. lake.by surface.are.,Lake.Supe.ior,USA and Canada,se.ve. as a mode. syste. for unde.standing cooling-me.iate. local re.ugia,as its cool wate. te.pe.ature. and wave.action have.maintaine. shore.ine.habitats suitable.for southe.n disjunct populations of arctic-alpine.plants since.***,we.se.k to e.plain spatial patte.ns and e.vironme.tal drive.s of arctic-alpine.plant re.ugia along Lake.Supe.ior’s shore.,and asse.s future.risk to re.ugia unde. mode.ate.+3.5℃)and warme.t(+5.7℃)climate.warming ***,we.e.amine. how the.inte.active.e.fe.ts of summe. surface.wate. te.pe.ature. and wind affe.te. onshore.te.pe.ature.,re.ulting in are.s of coole. ***,we.de.e.ope. an e.ological niche.mode. for the.pre.e.ce.of disjunct arctic-alpine.re.ugia(pooling 1253 occurre.ce. from 58 spe.ie.)along the.lake.s ***,we.fit spe.ie. distribution mode.s for 20 of the.most common arctic-alpine.disjunct spe.ie. and pre.icte. pre.e.ce.to ide.tify re.ugia ***,we.use. the.two climate.warming sce.arios to pre.ict change. in the.pre.e.ce.of re.ugia and disjunct *** type.e.e.ation above.wate.,inland distance.July land surface.te.pe.ature.from MODIS/Te.ra sate.lite.and ne.r-shore.de.th of wate. we.e.the.be.t pre.ictors of disjunct ***,we.pre.icte. 2236 km of the.shore.ine.51%)as disjunct re.ugia habitat for at le.st one.spe.ie. unde. curre.t conditions,but this was re.uce. to 20% and 7% with mode.ate.894 km)and warme.t(313 km)climate.change.proje.tions.

关键词： climate.re.ugia disjunct populations lake.e.fe.t Lake.Supe.ior spe.ie. distribution mode.s

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e.ficie.tly adding mode.multiple.ing for cost-e.fe.tive.high-capacity fibe. links

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Advance. Photonics 2024年第1期6卷 8-9页

作者： Alan e.Willne. Huibin Zhou Unive.sity of Southe.n California Los AngelesCaliforniaUnited States

For de.ade.,a powe.ful approach to adding data capacity in an optical communication link has be.n to multiple. inde.e.de.t data-carrying channe.s and transmit the. simultane.usly along a fibe..^(1)For e.ample.wave.e.gth-division-multiple.ing(WDM)was a ke. te.hnology in the.1990s and e.rly 2000s to dramatically incre.se.aggre.ate.capacity in a fibe. by multiple.ing be.ms of diffe.e.t wave.e.gths.^(2)For the.past roughly 15 ye.rs,the.e.has be.n gre.t promise.that space.division-multiple.ing(SDM)may bring similar capacity e.hance.e.ts to optical fibe. communications.^(1–3)

关键词： fibe. multiple.ing adding

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