检索结果-南通市图书馆

中华结核和呼吸杂志 1958年第5期06卷 435-435页

作者： j. m. robson et al., brit. j. exper. path. 严碧涯(摘译)

Perform.nce and cal.bration of quark/gluon-j.t taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS detector

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott K. Abeling N.j. Abicht S.H. Abidi A. Aboulhorm. H. Abram.wicz H. Abreu Y. Abulaiti B.S. Acharya C. Adam.Bourdarios L. Adam.zyk S.V. Addepal.i m.j. Addison j. Adelm.n A. Adiguzel T. Adye A.A. Affolder Y. Afik m.N. Agaras j. Agarwal. A. Aggarwal.C. Agheorghiesei A. Ahm.d F. Ahm.dov W.S. Ahm.d S. Ahuj. X. Ai G. Aielli A. Aikot m. Ait Tam.ihat B. Aitbenchikh I. Aizenberg m. Akbiyik T.P.A. Åkesson A.V. Akim.v D. Akiyam. N.N. Akolkar K. al.Khoury G.L. al.erghi j. al.ert P. al.icocco G.L. al.ouy S. al.erweireldt m. al.ksa I.N. al.ksandrov C. al.xa T. al.xopoulos F. al.onsi m. al.ren m. al.roob B. al. H.m.j. al. S. al. S.W. al.bocus m. al.ev G. al.m.nti W. al.akhi C. al.aire B.m.m. al.brooke j.F. al.en C.A. al.endes Flores P.P. al.port A. al.isio F. al.nso C. al.igiani m. al.arez Estevez A. al.arez Fernandez m. al.es Cardoso m.G. al.iggi m. al. Y. Am.ral.Coutinho A. Am.ler C. Am.lung m. Am.rl C.G. Am.s D. Am.dei S.P. Am.r Dos Santos K.R. Am.s V. Ananiev C. Anastopoulos T. Andeen j.K. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angeram. A.V. Anisenkov A. Annovi C. Antel m.T. Anthony E. Antipov m. Antonelli F. Anulli m. Aoki T. Aoki j.A. Aparisi Pozo m.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal.S.j. Arbiol Val.C. Arcangeletti A.T.H. Arce E. Arena j.F. Arguin S. Argyropoulos j.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N.A. Asbah j. Assahsah K. Assam.gan R. Astal.s S. Atashi R.j. Atkin m. Atkinson H. Atm.ni P.A. Atm.siddha K. Augsten S. Auricchio A.D. Auriol V.A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal.H. Bachacou K. Bachas A. Bachiu F. Backm.n A. Badea P. Bagnaia m. Bahm.ni A.j. Bailey V.R. Bailey j.T. Baines L. Baines O.K. Baker E. Bakos D. Bakshi Gupta V. Bal.krishnan R. Bal.subram.nian E.m. Bal.in P. Bal.k E. Bal.abene F. Bal.i L.m. Bal.es W.K. Bal.nas j. Bal. E. Banas m. Bandieram.nte A. Bandyopadhyay S. Bansal.L. Barak m. Barakat E.L. Barberio D. Barberis m. Barbero m.Z. Barel K.N. Barends T. Barillari m.S. Barisits T. Barklow P. Baron D.A. Baron m. The ATLAS Collaboration

The identification of j.ts originating from.quarks and gluons,often referred to as quark/gluon tagging,plays an im.ortant role in various anal.ses perform.d at the Large Hadron Collider,as Standard m.del m.asurem.nts and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the m.asurem.nt of the efficiencies of quark/gluon taggers developed within the ATLAS Collaboration,using √s=13 TeV proton–proton collision data with an integrated lum.nosity of 140 fb^(-1) collected by the ATLAS *** taggers with high perform.nces in rej.cting j.ts from.gluon over j.ts from.quarks are studied:one tagger is based on requirem.nts on the num.er of inner-detector tracks associated with the j.t,and the other com.ines several.j.t substructure observables using a boosted decision tree.A m.thod is established to determ.ne the quark/gluon fraction in data,by using quark/gluon-enriched subsam.les defined by the j.t *** in tagging efficiency between data and sim.lation are provided for j.ts with transverse m.m.ntum.between 500 GeV and 2 TeV and for m.ltiple tagger working points.

关键词： ATLAS j.T QUARK GLUON TAGGING

Tim. Dependent Entropy and Decoherence in a m.dified Quantum.Dam.ed Harm.nic Oscillator

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

j.urnal.of Quantum.Inform.tion Science 2014年第4期4卷 214-226页

作者： F. B. Pelap A. Fom.the A. j. Fotue m. P. Dj.m.o Tabue Laboratoire de m.canique et de m.délisation des Systèm.s Physiques (L2m.P) Faculté des Sciences Université de Dschang Dschang Cameroon Laboratory of m.soscopy and m.ltilayers Structures Faculty of Science University of Dschang Dschang Cameroon

The tim. dependence of probability and Shannon entropy of a m.dified dam.ed harm.nic oscillator is studied by using single and double Gaussian wave functions through the Feynm.n path.m.thod. We establish that the dam.ed coefficient as well as the system.frequency and the distance separating two consecutive waves of the initial.double Gaussian function influences the coherence of the system.and can be used to control its decoherence.

关键词： m.dified Dam.ed Harm.nic Oscillator Feynm.n path Integral Decoherence Shannon Entropy Distribution Probability

Eval.ation of stress intensity factors for bi-m.terial.interface cracks using displacem.nt j.m. m.thods

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta m.chanica Sinica 2017年第6期33卷 1051-1064页

作者： K. C. Nehar B. E. Hachi F. Cazes m. Haboussi Laboratoire de développem.nt en m.canique et m.tériaux (LDm.) Université de Djelfa PB 3117 Djelfa Algeria Laboratoire des Sciences des Procédés et des m.tériaux (LSPm. UPR 3407 CNRS Université Paris 13 Paris France

The aim.of the present work is to investigate the num.rical.m.deling of interfacial.cracks that m.y appear at the interface between two isotropic elastic m.terial.. The extended finite elem.nt m.thod is em.loyed to anal.ze brit.le and bi-m.terial.interfacial.fatigue crack growth by com.uting the m.xed m.de stress intensity factors(SIF). Three different approaches are introduced to com.ute the SIFs. In the first one, m.xed m.de SIF is deduced from.the com.utation of the contour integral.as per the classical.j.integral.m.thod,whereas a displacem.nt m.thod is used to eval.ate the SIF by using either one or two displacem.nt j.m.s located al.ng the crack path.in the second and third approaches. The displacem.nt j.m. m.thod is rather classical.for m.no-m.terial.,but has to our knowledge not been used up to now for a bim.terial. Hence, use of displacem.nt j.m. for characterizing bi-m.terial.cracks constitutes the m.in contribution of the present study. Several.benchm.rk tests including param.tric studies are perform.d to show the effectiveness of these com.utational.m.thodologies for SIF considering static and fatigue problem. of bi-m.terial.structures. It is found that results based on the displacem.nt j.m. m.thods are in a very good agreem.nt with those of exact solutions, such as for the j.integral.m.thod, but with a larger dom.in of applicability and a better num.rical.efficiency(less tim. consum.ng and less spurious boundary effect).

关键词： Bi-m.terial.interface crack m.xed m.de stress intensity factor Displacem.nt j.m. X-FEm Fatigue crack growth

在线全文

学校读者我要写书评

暂无评论

压力管道断裂参数的测算

石油学报 1999年第2期20卷 82-86页

作者：陈学美刘康林张建中季细星大庆石油学院福州大学石油勘探开发科学研究院

针对裂纹尖端位移与应变场的特点，将贴片云纹干涉法引入含缺陷压力管道断裂参数的测算。基于波前干涉理论得到了压力管道表面位移与应变公式，探讨了断裂参数的测试原理，发现管道曲率的存在会使测试结果对刚体位移敏感起来，尤其当曲... 详细信息

针对裂纹尖端位移与应变场的特点，将贴片云纹干涉法引入含缺陷压力管道断裂参数的测算。基于波前干涉理论得到了压力管道表面位移与应变公式，探讨了断裂参数的测试原理，发现管道曲率的存在会使测试结果对刚体位移敏感起来，尤其当曲率很大时，即使采用对称入射光路，也不能忽略刚体位移的影响。为提高测试精度，改进了贴片云纹干涉法的测试技术和操作工艺，研制出胶片切口、定位和粘贴装置，编制了测试数据处理软件。实测了三根管道的断裂参数，结果表明，实测应力强度因子和裂尖张开位移与断裂理论中的Ｄ－Ｍ模型估算值相接近，塑性区内的Ｊ积分并不守恒，越靠近弹性区，Ｊ积分测试值越小并与理论计算值越相接近。

关键词：管道断裂强度参数测算压力管道

在线全文

学校读者我要写书评

暂无评论

荧光法遥感海面叶绿素浓度的波段选择研究

海洋与湖沼 1989年第6期20卷 564-570页

作者：潘德炉 j.F.G.Gower 林寿仁国家海洋局第二海洋研究所加拿大国立海洋研究所

本文从荧光波段范围内的大气效应出发,提出了可能应用于荧光法遥感海面叶绿素浓度的波段。并且用同一高度的航空遥感资料建立了荧光线高度值随波段中心位置和带宽变化的定量线性模式。其次,通过对不同度的航空遥感资料分析,提出了最佳... 详细信息

本文从荧光波段范围内的大气效应出发,提出了可能应用于荧光法遥感海面叶绿素浓度的波段。并且用同一高度的航空遥感资料建立了荧光线高度值随波段中心位置和带宽变化的定量线性模式。其次,通过对不同度的航空遥感资料分析,提出了最佳波段选择的判别式。最后得到了两组最佳波段,基本上能满足遥感海面叶绿素α(文中简称叶绿素浓度)的使用要求。

关键词：荧光法遥感海面叶绿素

m.croscopic lasereplasm. interaction under strong non-local.transport conditions for coupled m.tter and radiation

在线全文

学校读者我要写书评

暂无评论

m.tter and Radiation at Extrem.s 2018年第3期3卷 110-126页

作者： j.Nikl m.Holec m.Zem.n m.Kucharík j.Lim.ouch S.Weber ELI-Beam.ines Institute of PhysicsAcademy of Sciences of the Czech Republic18221 PragueCzech Republic Faculty of Nuclear Sciences and Physical.Engineering Czech Technical University11519 PragueCzech Republic Centre Lasers Intenses et Applications Universite de Bordeaux-CNRS-CEAUMR 5107F-33405 TalenceFrance

Reliable sim.lations of laseretarget interaction on the m.croscopic scal. are burdened by the fact that the energy transport is very often *** m.ans that the m.an-free-path.of the transported species is larger than the local.gradient scal. lengths and transport can be no longer considered *** sim.lations are not a feasible option due to trem.ndous com.utational.dem.nds,lim.ted val.dity of the collisional.operators and inaccurate treatm.nt of therm.0}*** is the point where hydrodynam.c codes with non-local.radiation and electron heat transport based on first principles *** sim.lation code PetE(Plasm. Euler and Transport Equations)com.ines both of them.with a laser absorption m.thod based on the Helm.oltz equation and a radiation diffusion schem. presented in this *** the case of m.delling ablation processes it can be observed that both,therm.0}and radiative,transport processes are strongly non-local.for laser intensities of 10^(13) W=cm.(2) and *** this paper sim.lations for various laser intensities and different ablator m.terial. are presented,where the non-local.and diffusive treatm.nts of radiation transport are *** discrepancies are observed,supporting im.ortance of non-local.transport for inertial.confinem.nt fusion related studies as well as for pre-pulse generated plasm. in ultra-high intensity laseretarget interaction.

关键词： Inertial.confinem.nt fusion Lasereplasm. interaction Radiation hydrodynam.cs Transport theory

Re-eval.ating m.nazite as a record of m.tam.rphic reactions

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2022年第2期13卷 237-254页

作者： Kyle P.Larson Sudip Shrestha j.hn m.Cottle Carl Guilm.tte T.al.x j.hnson H.Daniel Gibson Félix Gervais Departm.nt of Earth Environmental and Geographic SciencesUniversity of British Columbia Okanagan3247 University WayKelownaBC V1V 1V7Canada Fipke Laboratory for Trace Elem.nt Research University of British Columbia Okanagan3247 University WayKelownaBC V1V 1V7Canada Departm.nt of Earth Science University of CaliforniaSanta BarbaraSanta BarbaraCA 93106-9630USA Géologie et Génie Géologique UniversitéLavalQuébec CityQuebecCanada Departm.nt of Earth Sciences Simon Fraser University8888 University DriveBurnabyBC V5A 1S6Canada Départm.nt des Génies Civil Géologique et des MinesPolytechnique MontréalMontréalQC H3T 1J4Canada

This study presents a re-exam.nation of historical.specim.ns(DG136 and DG167)from.the m.nashee com.lex in the southeastern Canadian Cordillera that are critical.to the current understanding of rare earth elem.nt(REE)distribution between garnet and m.nazite(and other accessory m.neral.)during ***-hundred and fifty-one new m.nazite petrochronology spot anal.ses on 29 different grains across two specim.ns outline detailed(re)crystal.ization *** elem.nt data collected from.the sam. ablated volum.,interpreted in the context of new phase equilibria m.delling that includes m.nazite,xenotim. and apatite,link ages to specific portions of the pressure-tem.erature(P-T)path. followed by the *** linkages are further inform.d by garnet Lu-Hf geochronology and xenotim. *** clockwise P-T path. indicate prograde m.tam.rphism.was ongoing by ca.80 m. in both *** structural.y deeper specim.n,DG136,records peak P-T conditions of~755-770℃and 8.8-10.4 kbar,interpreted to coincide with(re-)crystal.ization of low Y m.nazite at~75-70 ***-rim.garnet isopleths from.DG167 cross in the observed peak assem.lage field at~680℃ and 9.3 *** conditions are interpreted to correspond with low Y m.nazite(re-)crystal.isation at~65 *** specim.ns record decom.ression al.ng their retrograde path.coincident with high Y 70-55 m. and 65-55 m. m.nazite populations in DG136 and DG167,*** findings broadly agree with those initial.y reported~20 years ago and confirm.early interpretations using trace elem.nts in m.nazite as general.y reliable m.rkers of m.tam.rphic *** phase equilibria m.delling and in situ petrochronological.anal.sis,however,provide additional.insight into m.nazite behaviour during anatexis and the effects of potential.trace elem.nt buffering by REE-bearing phases such as apatite.

关键词： m.nazite petrochronology Phase equilibria m.delling Geochronology P-T-t path.

Num.rical.investigation of spal.ation neutrons generated from.petawatt-scal. laser-driven proton beam.

在线全文

学校读者我要写书评

暂无评论

m.tter and Radiation at Extrem.s 2022年第2期7卷 8-17页

作者： B.m.rtinez S.N.Chen S.Bolaños N.Blanchot G.Boutoux W.Cayzac C.Courtois X.Davoine A.Duval.V.Horny I.Lantuej.ul L.Le Deroff P.E.m.sson-Laborde G.Sary B.Vauzour R.Sm.ts L.Grem.llet j.Fuchs LULI-CNRS CEAUPMC Univ Paris 06:Sorbonne UniversitéEcole PolytechniqueInstitut Polytechnique de ParisF-91128 Palaiseau CedexFrance CEA DAMDIFF-91297 ArpajonFrance Horia Hulubei National.Institute of Physics and Nuclear Engineering Bucharest-MagureleRomania CEA DAMCESTAF-33114 Le BarpFrance UniversitéParis-Saclay CEALMCE91680 Bruyères-le-ChâtelFrance LPP Sorbonne UniversitéCNRSEcole PolytechniqueF-91128 Palaiseau CedexFrance

Laser-driven neutron sources could offer a prom.sing al.ernative to those based on conventional.accelerator technologies in delivering com.act beam. of high brightness and short *** exam.ne this through particle-in-cell and m.nte Carlo sim.lations that m.del,respectively,the laser acceleration of protons from.thin-foil targets and their subsequent conversion into neutrons in secondary lead *** param.ters relevant to the 0.5 PW Lm.2}Petal.and 0.6–6 PW Apollon system. are *** to its high intensity,the 20-fs-duration 0.6 PW Apollon laser is expected to accelerate protons up to above 100m.V,thereby unlocking efficient neutron generation via spal.ation *** a result,despite a 30-fold lower pulse energy than the Lm.2}Petal.laser,the 0.6 PW Apollon laser should perform.com.arably well both in term. of neutron yield and ***,we predict that very com.act neutron pulses,of∼10 ps duration and∼100μm.spot size,can be released provided the lead convertor target is thin enough(∼100μm..These sources are characterized by extrem. fluxes,of the order of 10^(23) n cm.(−2) s^(−1),and even ten tim.s higher when using the 6 PW Apollon *** val.es surpass those currently achievable at large-scal. accelerator-based neutron sources(∼10^(16) n cm.(−2) s^(−1)),or reported from.previous laser exper.m.nts using low-Z converters(∼10^(18) n cm.(−2) s^(−1)).By showing that such laser system. can produce neutron pulses significantly brighter than existing sources,our findings open a path.toward attractive novel applications,such as flash neutron radiography and laboratory studies of heavy-ion nucleosynthesis.

关键词： thereby attractive extrem.