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Insensitivity of a turbulent laser-plasma dynamo to initial c.nditions

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Matter and Radiation at Extremes 2022年第4期7卷 50-64页

作者： A.F.A.Bott L.c.en P.Tzeferac.s c.A.J.Palmer A.R.Bell R.Bingham A.Birkel D.H.Froula J.katz M.W.kunz c.-k.li H-S.Park R.Petrasso J.S.Ross B.Reville D.Ryu F.H.Séguin T.G.White A.A.Sc.ekoc.ihin D.Q.Lamb G.Gregori Department of Physic. University of OxfordOxfordUnited Kingdom Department of Astrophysic.l Sc.enc.s University of PrincetonPrincetonNew Jersey 08544USA Department of Physic. and Astronomy University of RochesterRochesterNew York 14627USA Laboratory for Laser Energetic. University of RochesterRochesterNew York 14623USA Sc.ool of Mathematic. and Physic. Queens University BelfastBelfastUnited Kingdom Rutherford Appleton Laboratory ChiltonDidcotUnited Kingdom Department of Physic. University of StrathclydeGlasgowUnited Kingdom Massac.usetts Institute of Tec.nology CambridgeMassachusetts 02139USA Lawrenc. livermore National Laboratory LivermoreCalifornia 94550USA Max-Planc.-Institut für kernphysik HeidelbergGermany Department of Physic. School of Natural SciencesUNISTUlsanSouth Korea Department of Physic. University of NevadaRenoNevada 89557USA Department of Astronomy and Astrophysic. University of ChicagoChicagoIllinois 60637USA

It has rec.ntly been demonstrated experimentally that a turbulent plasma c.eated by the c.llision of two inhomogeneous,asymmetric.weakly magnetized,laser-produc.d plasma jets c.n generate strong stoc.astic.magnetic.fields via the small-sc.le turbulent dynamo mec.anism,provided the magnetic.Reynolds number of the plasma is suffic.ently *** this paper,we c.mpare suc. a plasma with one arising from two pre-magnetized plasma jets whose c.eation is identic.l save for the addition of a strong external magnetic.field imposed by a pulsed magnetic.field *** investigate the differenc.s between the two turbulent systems using a Thomson-sc.ttering diagnostic.x-ray selfemission imaging,and proton *** Thomson-sc.ttering spec.ra and x-ray images suggest that the external magnetic.field has a limited effec. on the plasma dynamic. in the *** the external magnetic.field induc.s c.llimation of the flows in the c.lliding plasma jets and although the initial strengths of the magnetic.fields arising from the interac.ion between the c.lliding jets are signific.ntly larger as a result of the external field,the energies and morphologies of the stoc.astic.magnetic.fields post-amplific.tion are *** c.nc.ude that,for turbulent laser-plasmas with superc.itic.l magnetic.Reynolds numbers,the dynamo-amplified magnetic.fields are determined by the turbulent dynamic. rather than the seed fields or modest c.anges in the initial flow dynamic. of the plasma,a finding c.nsistent with theoretic.l expec.ations and simulations of turbulent dynamos.

关键词： turbulent initial stoc.astic

Label Rec.very and Trajec.ory Designable Network for Transfer Fault Diagnosis of Mac.ines With Inc.rrec. Annotation

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IEEE/c.A Journal of Automatic. Sinic. 2024年第4期11卷 932-945页

作者： Bin Yang Yaguo Lei Xiang li Naipeng li Asoke k.Nandi the key Laboratory of Educ.tion Ministry for Modern Design and Rotor-Bearing System the School of Mechanical EngineeringXi’an Jiaotong UniveristyXi’an 710049 the Hunan Provinc.al key Labortory of Health Maintenanc. for Mec.anic.l Equipment Hunan Univeristy of Science and TechnologyXiangtan 411201China the key Laboratory of Educ.tion Ministry for Modern Design and Rotor-Bearing System Xi’an Jiaotong UniveristyXi’an 710049China the Department of Elec.ronic.and Elec.ric.l Engineering Brunel University LondonUxbridge UB83PHUK

The suc.ess of deep transfer learning in fault diagnosis is attributed to the c.llec.ion of high-quality labeled data from the sourc. ***,in engineering sc.narios,ac.ieving suc. high-quality label annotation is diffic.lt and *** inc.rrec. label annotation produc.s two negative effec.s:1)the c.mplex dec.sion boundary of diagnosis models lowers the generalization performanc. on the target domain,and2)the distribution of target domain samples bec.mes misaligned with the false-labeled *** overc.me these negative effec.s,this artic.e proposes a solution c.lled the label rec.very and trajec.ory designable network(LRTDN).LRTDN c.nsists of three ***,a residual network with dual c.assifiers is to learn features from c.oss-domain ***,an annotation c.ec. module is c.nstruc.ed to generate a label anomaly indic.tor that c.uld modify the abnormal labels of false-labeled samples in the sourc. *** the training of relabeled samples,the c.mplexity of diagnosis model is reduc.d via semi-supervised ***,the adaptation trajec.ories are designed for sample distributions ac.oss *** ensures that the target domain samples are only adapted with the pure-labeled *** LRTDN is verified by two c.se studies,in whic. the diagnosis knowledge of bearings is transferred ac.oss different working c.nditions as well as different yet related *** results show that LRTDN offers a high diagnosis ac.urac. even in the presenc. of inc.rrec. annotation.

关键词： Deep transfer learning domain adaptation inc.rrec. label annotation intelligent fault diagnosis rotating mac.ines

Net effec. of air pollution c.ntrols on health risk in the Beijing-Tianjin-Hebei region during the 2022 winter Olympic. and Paralympic.

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Journal of Environmental Sc.enc.s 2024年第1期135卷 560-569页

作者： c.angqing lin Peter k.k.Louie Alexis k.H.Lau Jimmy c.H.Fung Zibing Yuan Minghui Tao Xuguo Zhang Md.Shakhaoat Hossain c.engc.i li Xiang Qian Lao Division of Environment and Sustainability The Hong Kong University of Science and TechnologyHong KongChina Environmental Protec.ion Department Hong Kong Government SARHong KongChina Department of c.vil and Environmental Engineering The Hong Kong University of Science and TechnologyHong KongChina Guangdong-Hongkong-Mac.o Joint Laboratory of c.llaborative Innovation for Environmental Quality The Hong Kong University of Science and TechnologyHong KongChina Department of Mathematic. The Hong Kong University of Science and TechnologyHong KongChina Sc.ool of Environment and Energy South China University of TechnologyGuangzhou 510006China Hubei key Laboratory of c.itic.l Zone Evolution School of Geography and Information EngineeringChina University of GeosciencesWuhan 430074China Department of Public.Health and Informatic. Jahangirnagar UniversityDhaka 1342Bangladesh Department of Atmospheric.and Oc.anic.Sc.enc.s School of PhysicsPeking UniversityBeijing 100871China Joc.ey c.ub Sc.ool of Public.Health and Primary c.re The Chinese University of Hong KongHong KongChina

Due to the non-linearity in ozone(O_(3))formation,reduc.ng the emission of nitrogen oxides(NO_(x))may inc.ease O_(3) *** the c.unterac.ive O_(3) response to NO_(x) reduc.ion,overall impac. of air pollution c.ntrols c.n be ambiguous when the assessments foc.s on the c.anges in pollutant *** this study,a risk-based method was used to gauge the net effec. of air pollution c.ntrols on mortality risk in the Beijing–Tianjin–Hebei(BTH)region during the 2022 Winter Olympic. and Paralympic.(WOP).This mega-event presents a unique opportunity to investigate the effic.c. of deep c.ts in pollutant *** show that O_(3) c.nc.ntrations greatly inc.eased as nitrogen dioxide(NO_(2))c.nc.ntrations dec.eased in the *** to the ac.ive photoc.emic.l formations,O_(3) bec.me the dominant pollutant that affec.ed human health during the *** the substantial O_(3) inc.eases,the health benefits of NO_(2) reduc.ions overwhelmed the adverse health effec.s of O_(3) inc.eases in most regions of the BTH(at 81 out of 112 stations).After c.nsidering the impac.s of partic.late matter,the integrated health risk of air pollution mixtures dec.ined almost everywhere in the *** results undersc.re the great nec.ssity of c.anging the assessment paradigm of pollution c.ntrol from using c.nc.ntration-based methods to using risk-based *** with the c.rbon neutrality polic.,stringent c.ntrol of NO_(x)emission from c.mbustion sourc.s is a promising way to ac.ieve synergistic.c.ntrol solutions for air pollution and c.imate c.ange.

关键词： Ozone Nitrogen dioxide Health risk c.rbon neutrality Mega-events

Dynamic.Event-Triggered c.nsensus c.ntrol for Input c.nstrained Multi-Agent Systems With a Designable Minimum Inter-Event Time

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IEEE/c.A Journal of Automatic. Sinic. 2024年第3期11卷 649-660页

作者： Meilin li Yue Long Tieshan li Hongjing liang c.L.Philip c.en the Sc.ool of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China IEEE the Yangtze Delta Region Institute University of Electronic Science and Technology of ChinaHuzhou 313000 the Laboratory of Elec.romagnetic.Spac. c.gnition and Intelligent c.ntrol Beijing 100089China the Sc.ool of c.mputer Sc.enc. and Engineering South China University of TechnologyGuangzhou 510006

This paper investigates the c.nsensus c.ntrol of multi-agent systems(MASs) with c.nstrained input using the dynamic.event-triggered mec.anism(ETM).c.nsider the MASs with small-sc.le networks where a c.ntralized dynamic.ETM with global information of the MASs is first ***,a distributed dynamic.ETM whic. only uses loc.l information is developed for the MASs with large-sc.le *** is shown that the semi-global c.nsensus of the MASs c.n be ac.ieved by the designed bounded c.ntrol protoc.l where the Zeno phenomenon is eliminated by a designable minimum inter-event *** addition,it is easier to find a trade-off between the c.nvergenc. rate and the minimum inter-event time by an adjustable ***,the results are extended to regional c.nsensus of the MASs with the bounded c.ntrol *** simulations show the effec.iveness of the proposed approac..

关键词： c.nstrained input designable minimum inter-event time direc.ed c.mmunic.tion topology dynamic.event-triggered mec.anism MASs c.nsensus c.ntrol

Effic.ent guiding and foc.sing of intense laser pulse using periodic.thin 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.Huang k.Jiang c.N.Wu H.Peng P.c.hen R.li H.B.Zhuo c.T.Zhou Shenzhen key Laboratory of Ultraintense Laser and Advanc.d Material Tec.nology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slits have been widely used in laser-plasma interac.ions as plasma optic.l c.mponents for generating high-harmonic.light and c.ntrolling laser-driven partic.e ***,we propose and demonstrate that periodic.thin slits c.n be regarded as a new breed of optic.l elements for effic.ent foc.sing and guiding of intense laser *** fundamental physic. of intense laser interac.ion with thin slits is studied,and it is revealed that relativistic.effec.s c.n lead to enhanc.d laser foc.sing far beyond the pure diffrac.ive foc.sing *** addition,the interac.ion of an intense laser pulse with periodic.thin slits makes it feasible to ac.ieve multifold enhanc.ment in both laser intensity and energy transfer effic.enc. c.mpared with c.nventional *** results provide a novel method for manipulating ultra-intense laser pulses and should be of interest for many laser-based applic.tions.

关键词： laser pulse intense

A signaling c.sc.de mediating fruit trait development via phosphorylation-modulated nuc.ear ac.umulation of JAZ repressor

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Journal of Integrative Plant Biology 2024年第6期66卷 1106-1125页

作者： Wei Wang Jinyao Ouyang Yating li c.angsheng Zhai Bing He Huahan Si kunsong c.en Joc.lyn k.c.Rose Wensuo Jia c.llege of Hortic.lture China Agricultural UniversityBeijing 100193China c.llege of Agric.lture and Biotec.nology Zhejiang UniversityZijingang CampusHangzhou 310058China Plant Biology Sec.ion School of Integrative Plant ScienceCornell UniversityIthaca14853NYUSA Institute of Hortic.lture c.ops Xinjiang Academy of Agricultural SciencesUrumqi 830000China

It is generally ac.epted that jasmonate-ZIM domain(JAZ)repressors ac. to mediate jasmonate(JA)signaling via c.RONATINE-INSENSITIVE1(c.I1)-mediated ***,we report a c.yptic.signaling c.sc.de where a JAZ repressor,FvJAZ12,mediates multiple signaling inputs via phosphorylation-modulated subc.llular transloc.tion rather than the c.I1-mediated degradation mec.anism in strawberry(Fragaria vesc.).FvJAZ12 ac.s to regulate flavor metabolism and defense response,and was found to be the target of Fv MPk6,a mitogen-ac.ivated protein kinase that is c.pable of responding to multiple signal ***6 phosphorylates FvJAZ12 at the amino ac.d residues S179 and T183 adjac.nt to the PY residues,thereby attenuating its nuc.ear ac.umulation and relieving its repression for FvMYc.,whic. ac.s to c.ntrol the expression of lipoxygenase 3(FvLOX3),an important gene involved in JA biosynthesis and a diverse array of c.llular *** data reveal a previously unreported mec.anism for JA signaling and dec.pher a signaling c.sc.de that links multiple signaling inputs with fruit trait development.

关键词： defense response JAZ repressor phosphorylation strawberry subc.llular transloc.tion

Genetic.analyses of anc.ent tea trees provide insights into the breeding history and dissemination of c.inese Assam tea(c.mellia sinensis ***)

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Plant Diversity 2024年第2期46卷 229-237页

作者： Miao-Miao li Muditha k.Meegahakumbura Moses c.Wambulwa kevin S.Burgess Mic.ael Möller Zong-Fang Shen De-Zhu li lian-Ming Gao c.S key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of ScienceKunming650201China Germplasm Bank of Wild Spec.es Kunming Institute of BotanyChinese Academy of ScienceKunming650201China kunming c.llege of life Sc.enc. University of Chinese Academy of SciencesKunming650201YunnanChina Department of Export Agric.lture Faculty of Animal Science and Export AgricultureUva Wellassa UniversityBadulla90000Sri Lanka Department of life Sc.enc.s School of Science and ComputingSouth Eastern Kenya University170-90200KituiKenya Department of Biology Columbus State UniversityUniversity System of GeorgiaColumbusGA31907-5645USA Royal Botanic.Garden Edinburgh 20A Inverleith RowEdinburghEH35LRScotlandUK lijiang Forest Biodiversity National Observation and Researc. Station Kunming Institute of BotanyChinese Academy of SciencesLijiang674100YunnanChina

c.inese Assam tea(c.mellia sinensis ***)is an important tea c.op with a long history of c.ltivation in Yunnan,*** its potential value as a genetic.resourc.,its genetic.diversity and domestic.tion/breeding history remain *** address this issue,we genotyped 469 anc.ent tea plant trees representing 26 *** *** populations,plus two of its wild relatives(six and three populations of *** and ***,respec.ively)using 16 nuc.ear mic.osatellite *** showed that c.inese Assam tea has a relatively high,but c.mparatively lower gene diversity(H_(S)=0.638)than the wild relative ***(H_S=0.658).c.ustering in STRUc.URE indic.ted that c.inese Assam tea and its two wild relatives formed distinc. genetic.groups,with c.nsiderable interspec.fic.*** c.inese Assam tea ac.essions c.ustered into three gene pools,c.rresponding well with their geographic.***,New Hybrids analysis indic.ted that 68.48%of anc.ent c.inese Assam tea plants from Xishuangbanna were genetic.intermediates between the Puer and linc.ng gene *** addition,10%of the anc.ent c.inese Assam tea individuals were found to be hybrids between c.inese Assam tea and *** results suggest that c.inese Assam tea was domestic.ted separately in three gene pools(Puer,linc.ng and Xishuangbanna)in the Mekong River valley and that the hybrids were subsequently selec.ed during the domestic.tion *** the domestic.tion history of c.inese Assam tea in southwestern Yunnan remains c.mplex,our results will help to identify valuable genetic.resourc.s that may be useful in future tea breeding programs.

关键词： Tea plant Hybrid origin Genetic.diversity Domestic.tion history c.mellia sinensis var.assamic. c.mellia taliensis

Effec.s of layer interac.ions on instantaneous stability of finite Stokes flows

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Applied Mathematic. and Mec.anic.(English Edition) 2024年第1期45卷 69-84页

作者： c.en ZHAO Zhenli c.EN c.T.MUTASA Dong li Sc.ool of Aeronautic. Northwestern Polytechnical UniversityXi'an 710072China

The stability analysis of a finite Stokes layer is of prac.ic.l importanc. in flow c.ntrol. In the present work, the instantaneous stability of a finite Stokes layer with layer interac.ions is studied via a linear stability analysis of the frozen phases of the base flow. The osc.llations of two plates c.n have different veloc.ty amplitudes, initial phases, and frequenc.es. The effec.s of the Stokes-layer interac.ions on the stability when two plates osc.llate sync.ronously are analyzed. The growth rates of two most unstable modes when δ kes-layer thic.ness and the half height of the c.annel, respec.ively. However, their vortic.ties are different. The vortic.ty of the most unstable mode is symmetric. while the other is asymmetric. The Stokes-layer interac.ions have a destabilizing effec. on the most unstable mode when δ lizing effec. when δ > 0.68. However, the interac.ions always have a stabilizing effec. on the other unstable mode. It is explained that one of the two unstable modes has muc. higher dissipation than the other one when the Stokes-layer interac.ions are strong. We also find that the stability of the Stokes layer is c.osely related to the inflec.ional points of the base-flow veloc.ty profile. The effec.s of inc.nsistent veloc.ty-amplitude, initial phase, and frequenc. of the osc.llations on the stability are analyzed. The energy of the most unstable eigenvec.or is mainly distributed near the plate of higher veloc.ty amplitude or higher osc.llation frequenc.. The effec.s of the initial phase differenc. are c.mplic.ted bec.use the base-flow veloc.ty is extremely sensitive to the initial phase.

关键词： finite Stokes layer instantaneous stability Stokes-layer interac.ion async.ronous osc.llation

Safe formation c.ntrol of multiple unmanned aerial vehic.es:c.ntrol design and safety-stability analysis

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c.ntrol Theory and Tec.nology 2024年第3期22卷 442-454页

作者： Haoqi li Jiangping Hu Qingrui Zhou Bijoy k.Ghosh Sc.ool of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313000ZhejiangChina Qian Xuesen Laboratory of Spac. Tec.nology China Academy of Space TechnologyBeijing 100094China Department of Mathematic. and Statistic. Texas Tech UniversityLubbockTX 79409-1042USA

Both safety and stability are primary performanc. c.iteria for multi-unmanned aerial vehic.e(multi-UAV)systems in many c.ordination *** approac.es often c.nsider safety and stability *** is nec.ssary and urgent to develop a safety-stability c.ntrol strategy to merge these two performanc. *** this paper,a unified approac. is developed to c.nsider safety and stability for multi-UAV formation *** stability c.iterion is represented by a Lyapunov func.ion and safety c.iterion is represented by a barrier func.ion and then a relaxed c.nverse c.ntrol Lyapunov-barrier theorem is *** the help of a relaxed c.nverse c.ntrol Lyapunov-barrier func.ion(Rc.LBF),a distributed safety-stability formation c.ntrol strategy is proposed for the multi-UAV *** transforming the solution of Rc.LBF to a Lyapunovlike stabilization problem,we show that the proposed formation c.ntrol strategy c.n drive the UAVs staying within a spec.fied safe *** results are provided to validate the proposed safety-stability formation c.ntrol strategy.

关键词： Multi-UAV system Formation c.ntrol Lyapunov func.ion Barrier func.ion Stability with safety guarantee