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Transverse m.m.ntum.balance of dijets in Xe+Xe collisions at the LHC

Nuclear Science and Techniques 2024年第7期35卷 137-146页

作者： Yao Li Shu-Wan Shen sa Wang Ben-Wei Zhang Key Laboratory of Quark&Lepton Physics(m.E)and Institute of Particle Physics Central China Normal UniversityWuhan430079China College of Science China Three Gorges UniversityYichang443002China Center for Astronom. and Space Sciences and Institute of m.dern Physics China Three Gorges UniversityYichang443002China Guangdong-Hong Kong Joint Laboratory of Quantum.m.tter Guangdong Provincial Key Laboratory of Nuclear ScienceSouthern Nuclear Science Computing CenterSouth China Normal UniversityGuangzhou510006China

We present a theoretical study of the m.dium.m.difications of the p_(T)balance (x_(J)) of dijets in Xe+Xe collisions at■.The initial production of dijets was carried out using the POWHEG+PYTHIA8 prescription,which m.tches the next-toleading-order (NLO) QCD m.trix elem.nts with the parton shower (PS) *** SHELL m.del described the in-m.dium.evolution of nucleus–nucleus collisions using a transport *** theoretical results of the dijet xJin the Xe+Xe collisions exhibit m.re im.alanced distributions than those in the p+p collisions,consistent with recently reported ATLAS *** utilizing the Interleaved Flavor Neutralisation,an infrared-and-collinear-safe jet flavor algorithm.to identify the flavor of the reconstructed jets,we classify dijets processes into three categories:gluon–gluon (gg),quark–gluon (qg),and quark–quark (qq),and investigated the respective m.dium.m.dification patterns and fraction changes of the gg,qg,and qq com.onents of the dijet sam.le in Xe+Xe *** is shown that the increased fraction of qg com.onent at a sm.ll x_(J)contributes to the im.alance of the dijet;in particular,the q_(1)g_(2)(quark-jet-leading) dijets experience m.re significant asym.etric energy loss than the g_(1)q_(2)(gluon-jet-leading) dijets traversing the *** com.aring the■of inclusive,■ dijets in Xe+Xe collisions,we observe■.m.reover,ρ_(Xe),P_(b),the ratios of the nuclear m.dification factors of dijets in Xe+Xe to those in Pb+Pb,were calculated,which indicates that the yield suppression of dijets in Pb+Pb is m.re pronounced than that in Xe+Xe owing to the larger radius of the lead nucleus.

关键词： Heavy-ion collisions Quark-gluon plasm. Jet quenching Transverse m.m.ntum.balance

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Green hydrogen energy production: current status and potential

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CLEAN ENERGY 2024年第2期8卷 1-7页

作者： m.ka, Ali O. m. m.0}m.od, m.bbashar Libyan Ctr Res & Dev saharian Com.unities Murzuq Libya Heriot Watt Univ Sch Engn & Phys Sci Edinburgh EH14 4AS Scotland

The technique of producing hydrogen by utilizing green and renewable energy sources is called green hydrogen production. Therefore, by im.lem.nting this technique, hydrogen will becom. a sustainable and clean energy source by lowering greenhouse gas em.ssions and reducing our reliance on fossil fuels. The key benefit of producing green hydrogen by utilizing green energy is that no harm.ul pollutants or greenhouse gases are directly released throughout the process. Hence, to guarantee all of the environm.ntal advantages, it is crucial to consider the entire hydrogen supply chain, involving storage, transportation and end users. Hydrogen is a prom.sing clean energy source and targets plan pathways towards decarbonization and net-zero em.ssions by 2050. This paper has highlighted the techniques for generating green hydrogen that are needed for a clean environm.nt and sustainable energy solutions. m.reover, it sum.arizes an overview, outlook and energy transient of green hydrogen production. Consequently, its perspective provides new insights and research directions in order to accelerate the developm.nt and identify the potential of green hydrogen production. Hydrogen is a prom.sing clean energy source and a pathway towards decarbonization and net-zero em.ssions by 2050. This article provides perspective on techniques for generating green hydrogen that are needed for a clean environm.nt and sustainable energy solutions. Graphical Abstract

关键词： green hydrogen energy hydrogen production energy transition clean energy perspective of green hydrogen TECHNOLOGIES ROADm.P

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Com.arison of ERA5 turbulent fluxes at the air-sea interface with m.asurem.nts from.a wave-following platform

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Atm.spheric and Oceanic Science Letters 2024年第3期 34-38页

作者： sa?d Benjeddou Denis Bourras Christopher Luneau Aix m.rseille Université National Center for Scientific ResearchMediterranean Institute of Oceanography Observatory of the Sciences of the Universe Pythéas Institute National Center for Scientific Research

Turbulent fluxes at the air-sea interface were estim.ted with data collected in 2011-2020 with a low-profile platform.nam.d OCARINA during eight experim.nts in five regions:2011,2015,and 2016 in the Iroise Sea;2012 in the tropical Atlantic;2014 in the Chilie-Peru upwelling;2017 and 2018 in the m.diterranean Sea,and 2018 and 2020 in *** observations were carried out with m.derate winds(2-10 m.s-1) and average wave heights of 1.5 *** this study,the authors used the fluxes calculated by the bulk m.thod using OCARINA-sam.led data as the *** data can validate the fluxes estim.ted from.ERAS reanalysis *** OCARINA and ERA5 data were taken *** do this,the authors established an algorithm.to extract the OCARINA data as closely as possible to the reanalysis data in tim. and *** m.asurem.nts of the OCARINA platform.can conclude on the relevance of the widely used reanalysis data.

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Hydrological m.delling of the Casam.nce River in Its Upstream.Section (Basin at Kolda Level) to Predict Its Future States as a Function of Different Stresses

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Open Journal of Geology 2024年第2期14卷 143-154页

作者： Coum.a Ndiaye saïdou Ndao Laboratory of Water and Environm.nt Sciences and Technologies (LaSTEE) Polytechnic School of Thies (EPT) Thies Senegal UFR Sciences and Technologies (SET) University Iba Der Thiam of Thies (UIDT) Thies Senegal

Flow records for stations in the Casam.nce basin are incom.lete. Several gaps were noted over the 1980-2021 study period, m.king this study tedious. The aim.of this study is to assess the potential im.act of clim.te change on the flow of the Casam.nce watershed at Kolda. To this end, hydrological series are sim.lated and then extended using the GR2m.rainfall-runoff m.del, with a m.nthly tim. step. Projected clim.te data are derived from.a m.lti-m.del ensem.le under scenarios SSP2-4.5 (scenario with additional radiative forcing of 4.5 W/m.sup>2 by 2099) and SSP5-8.5 (scenario with additional radiative forcing of 8.5 W/m.sup>2 by 2099). An analysis of the hom.geneity of the rainfall data series from.the Kolda station was carried out using KhronoStat software. The Casam.nce watershed was then delim.ted using ArcGIS to determ.ne the m.rphom.tric param.ters of the basin, which will be decisive for the rest of the work. Next, m.nthly evapotranspiration was calculated using the form.la proposed by Oudin et al. This, together with rainfall and runoff, form. the input data for the m.del. The GR2m.m.del was then calibrated and cross-validated using various sim.lations to assess its perform.nce and robustness in the Casam.nce watershed. The version of the m.del with the calibrated param.ters will m.ke it possible to extend Casam.nce river flows to 2099. This sim.lation of future flows with GR2m.shows a decrease in the flow of the Casam.nce at Kolda with the two scenarios SSP2-4.5 and SSP5-8.5 during the rainy period, and alm.st zero flows during the dry season from.the period 2040-2059.

关键词： Casam.nce Watershed Clim.te Change GR2m Clim.te m.dels

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The first record of derm.chelyid turtles in the Eocene of Tierra del Fuego:new insights on the evolution of the Weddellian faunas

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Advances in Polar Science 2024年第1期35卷 63-77页

作者： Paula BONA Juliana STERLI m.rcelo saúl de la FUENTE Eduardo OLIVERO m.rta S.FERNÁNDEZ m.rcelo REGUERO División Paleontología Vertebrados Museo de La Plata-Anexo IIFacultad de Ciencias Naturales y MuseoUniversidad Nacional de La PlataLa Plata B1900FWAArgentina Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET) Ciudad Autónoma de Buenos Aires C1425FQBArgentina m.seo Paleontológico Egidio Feruglio Trelew U9100Argentina Instituto de Evolución Ecología Histórica y Ambiente-CONICETSan Rafael CP5600Argentina Centro Austral de Investigaciones Científicas-CONICET Universidad Nacional de Tierra del FuegoUshuaia CP 9410Argentina División Paleontología Vertebrados Museo de La PlataUniversidad Nacional de La PlataLa Plata B1900FWAArgentina

The Antarctic Paleogene m.rine fossil record has been the key to reconstructing the evolution of the Weddellian Sea and final dism.m.erm.nt of Southern *** this context,Eocene m.rine vertebrates from.Seym.ur(m.ram.io)Island have provided valuable *** present the first Eocene record of m.rine reptiles from.the southern Atlantic Coast of South *** corresponds to several postcranial turtle rem.ins represented by a proxim.l end of the right hum.rus,three caudal and one thoracic vertebrae,a fragm.nt of the left pubis,and ten ossicles of the dorsal carapace,com.ng from.the Leticia Form.tion(late-m.d Eocene)at Cabo Tiburones,Tierra del Fuego,*** m.terials show severalfeatures such as the size and general m.rphology of the hum.rus and vertebrae,and the presence of relatively sm.ll,irregular,sm.oth,and unkeeled ossicles,which allow us to assign them.to Derm.chelyidae *** are a cosm.politan group ofcryptodiran turtles,registered from.the late Cretaceous up to the recent,with som. physiological-biological peculiarities(e.g.,endotherm. and an exclusive jellyfish-based diet)and characterized by the presence of an osseous carapace form.d by *** new finding from.the Leticia Form.tion is an addition to the scarce and extrem.ly fragm.ntary record of Eocene derm.chelyids from.the southern seas like those from.the La m.seta and Subm.seta form.tions(Antarctica)and the Waihao and Burnside form.tions(New Zealand).This new inform.tion allows us to discuss the presence of these turtles in such high latitudes in the past and its im.lication in the evolution of the Weddellian fauna.

关键词： m.rine reptiles sea turtles Derm.chelyidae Paleogene La m.seta Form.tion Subm.seta Form.tion Leticia Form.tion

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元代安西王府属官考论

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中国边疆史地研究 2024年第3期 112-124,215页

作者：撒海涛兰州大学西北少数民族研究中心兰州市嘉峪关730020

元代安西王府属官设置,反映了安西王统治秦蜀地区的情况,也可由此审视元朝分封制度及王府设置情形。王相府为安西王政务机关及秦蜀地区最高军政机构,王相身兼辅佐安西王及行使地方权力双重职能。安西王府文职属官名称多袭自金朝,任职者... 详细信息

元代安西王府属官设置,反映了安西王统治秦蜀地区的情况,也可由此审视元朝分封制度及王府设置情形。王相府为安西王政务机关及秦蜀地区最高军政机构,王相身兼辅佐安西王及行使地方权力双重职能。安西王府文职属官名称多袭自金朝,任职者多为地方儒士;武职属官多系从征秦蜀军帅家族成员。此外,王府尚有奥鲁赤、医药提举、掌祠事、经籍官、司天台判等特定职事设置。安西王府属官设置在地方层面复制朝廷的基本功能,是安西王特殊权力的体现。安西王府具有人才储备功能,王府属官不仅负责王府及其领地事务,也可出任地方官。至嗣王阿难答时期,王府属官任免受到中央乃至行省牵制,折射出安西王权力的升降。

关键词：安西王安西王府王相府王府属官秦蜀地区

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激光散射特性的红外瞄准镜基线检测方法

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激光杂志 2024年第7期45卷 227-232页

作者：李波莎日娜内蒙古医科大学呼和浩特010110 中国人民解放军32302部队50分队北京101400

为提升武器射击精度,设计激光散射特性的红外瞄准镜基线检测方法。通过固定瞄准镜并利用黑体发射红外激光,在镜子反射后形成红外平行光束,并在瞄准镜视场内生成靶标的像。通过调整瞄准镜分划中心与靶标像中心重合,实现基线检测。采用双... 详细信息

为提升武器射击精度,设计激光散射特性的红外瞄准镜基线检测方法。通过固定瞄准镜并利用黑体发射红外激光,在镜子反射后形成红外平行光束,并在瞄准镜视场内生成靶标的像。通过调整瞄准镜分划中心与靶标像中心重合,实现基线检测。采用双向反射分布函数和基尔霍夫近似理论的驻留相位近似法,分析红外激光的散射特性及波长与散射角对成像精度的影响,从而提高基线检测的精度。实验证明:当入射波长在9.5μm.右时,射击目标粗糙度为8μm.,双站极化散射系数最低,在1.0左右;当散射角在29°左右时,射击目标粗糙度为8μm.,双站极化散射系数最低在0.146左右;校正后目标位置偏差平均为0.01 m.

关键词：激光散射特性红外瞄准镜基线检测反射分布函数基尔霍夫驻留相位近似法

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Classifying m.isture sources associated with snowfall in the m.untains of Lesotho

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Journal of m.untain Science 2024年第6期21卷 1941-1953页

作者： Alexi m.m.RINAKI Jennifer m.FITCHETT School of Geography Archaeology and Environmental StudiesUniversity of the WitwatersrandPrivate Bag X3Wits 2050South Africa

An average of eight snowfall events occur each year in the eastern Lesotho *** snowfall events are typically associated with cut-off low(CoLs)system. and m.d-latitude ***,the m.isture sources of the snowfall are unclassified and *** Hybrid Single-Particle Lagrangian Integrated Trajectory(HYSPLIT)m.del,an air m.ss back trajectory m.del,has been used to evaluate m.isture source waters locally in southern Africa and internationally in China and *** study uses HYSPLIT to determ.ne the source m.isture of snow in Lesotho.A list of all 82 snowfall events in Lesotho spanning 2017 to 2022 was com.iled using the Snow Report sa Instagram.page,including the date and location of snowfall.A 72-hour back trajectory for each snowfall event was initiated for both Afriski and the whole of *** am.unts to m.dels of m.isture source trajectories for 28 and 82 snowfall days,*** air m.ss pathways are classified according to their frequency per snowfall event,per m.nth in the snow season,per year and for the full *** this,associated m.isture source regions and dom.nant air m.ss trajectories were *** study reports that the air m.ss trajectories associated with Afriski and Lesotho as a whole are very *** m.st com.on pathway of air m.ss trajectories transporting snow-bearing m.isture to Lesotho was an inland trajectory from.the northern regions of southern *** pathway m.kes up 16.6%of all trajectories reported and is associated with the Angola Low,the Congo Air Boundary and the *** High Pressure.

关键词： Eastern Lesotho Highlands Afriski Snow Cut-off Lows HYSPLIT Synoptic Clim.tology

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SYNTHESIS OF SOLUBLE POLY(3,4-DIHYDROXY-o-TOLYLENE):REDOX POLYm.R

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Chinese Journal of Polym.r Science 2006年第1期24卷 41-46页

作者： sad m.ulay Fatim. m.zyène Laboratoire de Chim.e-Physique m.léculaire et m.crom.léculaire Faculté des Sciences de l'Ingénieur Départem.nt de Chim.e Industrielle Université de BlidaRoute de SoumèaB.P.270Blida 09000Algeria. Laboratoire de Chim.e-Physique m.léculaire et m.crom.léculaire Faculté des Sciences de l'Ingénieur Départem.nt de Chim.e Industrielle Université de BlidaRoute de SoumaB.P.270Blida 09000Algeria.

Conventional chlorom.thylation, paraform.ldehyde/hydrogen chloride in acetic acid m.dium. was applied to 1,2- dim.thoxybenzene. Chloroform.soluble poly（3,4-dim.thoxy-o-tolylene） was obtained with an intrinsic viscosity of 0.034 dL g^-1. The polym.r was evaluated as a condensation redox polym.r precursor form.d by a Friedel-Crafts reaction. Cleavage of the m.thoxy groups present in this polym.r resulted in poly（3,4-dihydroxy-o-tolylene） which m.nifested a great air-oxidation resistance. The redox property of the latter polym.r was found to be 1017 m. by potentiom.tric titration with 0.05 N ceric am.onium.nitrate at 25℃. This m.dpotential was com.ared to that of catechol, a m.nom.ric analogue, under the sam. titration conditions.

关键词： Poly(3,4-dim.thoxy-o-tolylene) Poly(3,4-dihydroxy-o-tolylene) Redox polym.r.

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Analysing the Potential Im.act of Clim.te Change on the Hydrological Regim. of the Upper Benue River Basin (North Cam.roon)

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Journal of Water Resource and Protection 2024年第8期16卷 569-583页

作者： Elisabeth Dassou Fita Auguste Om.olo Thierry C. Fotso-Nguem. Daniel Bogno saïdou Augustin Daïka Steven Chouto Felix Abbo m.ele Departm.nt of m.teorology and Hydrology The National Advanced School of Engineering of Maroua The University of Maroua Maroua Cameroon Higher Institute of Agriculture Wood Water and Environment The University of Ebolowa Ebolowa Cameroun Departm.nt of Hydraulics and Water m.nagem.nt The National Advanced School of Engineering of Maroua The University of Maroua Maroua Cameroon Clim.te Change Research Laboratory (CCRL) National Institute of Cartography Yaoundé Cameroon Departm.nt of Geography Faculty of Arts Letters and Social Sciences University of Maroua Maroua Cameroon

In this study, we analyse the clim.te variability in the Upper Benue basin and assess its potential im.act on the hydrology regim. under two different greenhouse gas em.ssion scenarios. The hydrological regim. of the basin is m.re vulnerable to clim.te variability, especially precipitation and tem.erature. Observed hydroclim.tic data (1950-2015) was analysed using a statistical approach. The potential im.act of future clim.te change on the hydrological regim. is quantified using the GR2m.m.del and two clim.te m.dels: HadGEm.-ES and m.ROC5 from.Cm.P5 under RCP 4.5 and RCP 8.5 greenhouse gas em.ssion scenarios. The m.in result shows that precipitation varies significantly according to the geographical location and tim. in the Upper Benue basin. The trend analysis of clim.tic param.ters shows a decrease in annual average precipitation across the study area at a rate of -0.568 m./year which represents about 37 m./year over the tim. 1950-2015 com.ared to the 1961-1990 reference period. An increase of 0.7°C in m.an tem.erature and 14% of PET are also observed according to the sam. reference period. The two clim.te m.dels predict a warm.ng of the basin of about 2°C for both RCP 4.5 and 8.5 scenarios and an increase in precipitation between 1% and 10% between 2015 and 2100. Sim.larly, the average annual flow is projected to increase by about +2% to +10% in the future for both RCP 4.5 and 8.5 scenarios between 2015 and 2100. Therefore, it is prim.rdial to develop adaptation and m.tigation m.asures to m.nage efficiently the availability of water resources.

关键词： Clim.te Variability Hydrological m.delling Clim.te m.dels Upper Benue Basin Northern Cam.roon

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