检索结果-南通市图书馆

First-principles calculations to investigate structural,electronic,magnetic,optical and thermody.amic properties of RE_(2)Rh_(3)Ge(RE=Pr,Sm)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Rare Earths 2024年第7期42卷 1385-1393,I0007页

作者： A.Ezaier R.Masrour M.Hamedoun j.k.arbach A.Rezzouk.A.Hourmatallah n.Benzak.ur k.Bously.hane Laboratory.of Solid Phy.ics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equipe de Phy.ique du Solide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In this paper,we analy.ed the phy.ical characteristics of the ternary.alloy. RE_(2)Rh_(3)Ge(RE=Pr and Sm)using the first principles calculation based on functional density.theory.integrated in the Wien2k.*** calculated formation energies of Pr_(2)Rh_(3)Ge and Sm_(2)Rh_(3)Ge are−5.3827 and−5.2782 eV/atom,respectively.showing that these alloy. may.exist *** results of the band structure and density.of states indicate that all of the compounds tested are magnetic metals,and their magnetism is mostly.related to the contribution of Pr and Sm *** total magnetic moments of Pr_(2)Rh_(3)Ge and Sm_(2)Rh_(3)Ge are 4.07245 and 11.16161μB/f.u,*** parameters such as heat capacity.at constant pressure,entropy.Deby. temperature,lattice volume,compressibility.coefficients,and Grüneisen parameter alloy. were calculated using the Gibbs algorithm and studied in depth over a large temperature range of 0-900 *** Deby. temperature increases with increasing pressure and decreases with decreasing ***,the Deby. temperatures calculated at p=0 GPa and T=300 k.are equal to be 342 and 322 k.for Pr_(2)Rh_(3)Ge and Sm_(2)Rh_(3)Ge,*** optical characteristics such as the real and imaginary.portions of the dielectric function,the absorption coefficient,the energy.loss function,and the refractive index were investigated and discussed in more depth.

关键词： Magnetic metals Functional density.theory Density.of states Magnetic moment Optical and thermody.amic properties Rare earths

Optimization of chemistry.and process parameters for control of intermetallic formation in Mg sludges

在线全文

学校读者我要写书评

暂无评论

journal of Magnesium and Alloy. 2024年第4期12卷 1431-1448页

作者： y.Fu G.G.Wang A.Hu y.Li k.B.Thack.r j.P.Weiler H.Hu Department of Mechanical Automotive and Materials EngineeringUniversity of Windsor401 Sunset AveWindsorOntario N9B 3P4Canada Global Technology.Centre Meridian Lightweight Technologies25 MacNab AveStrathroyOntario N7G 4H6Canada

Intermetallic formation in sludge during magnesium(Mg)melting,holding and high pressure die casting practices is a very.important ***,very.often it is overlook.d by.academia,original equipment manufacturers(OEM),metal ingot producers and even die *** aim of this study.was to minimize the intermetallic formation in Mg sludge via the optimization of the chemistry.and process *** Al8Mn5 intermetallic particles were identified by.the microstructure analy.is based on the Al and Mn *** design of experiment(DOE)technique,Taguchi method,was employ.d to minimize the intermetallic formation in the sludge of Mg alloy. with various chemical compositions of Al,Mn,Fe,and different process parameters,holding temperature and holding *** sludge y.eld(Sy.and intermetallic size(IS)was selected as two *** optimum combination of the levels in terms of minimizing the intermetallic formation were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,690℃ for the holding temperature and holding at 30 mins for the holding time,*** best combination for smallest intermetallic size were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,630℃ for the holding temperature and holding at 60 mins for the holding time,*** groups of sludge factors,Chemical Sludge(CSF),Phy.ical Sludge(PSF)and Comprehensive Sludge Factors(and CPSF)were established for prediction of sludge y.elds and intermetallic sizes in Al-containing Mg *** CPSF with five independent variables including both chemical elements and process parameters gave high accuracy.in prediction,as the prediction of the PSF with only.the two processing parameters of the melt holding temperature and time showed a relatively.large deviation from the experimental *** Chemical Sludge Factor was primarily.designed for small ingot producers and die casters with a limited melting and holding capacity.of which process parameters could be fixed *** Phy.ical Sludge Factor could be used f

关键词： Magnesium sludge Al-Mn intermetallic Optimization Taguchi method Sludge factor Chemical composition Process parameter

Greatly.enhanced corrosion/wear resistances of epoxy.coating for Mg alloy.through a sy.ergistic effect between functionalized graphene and insulated block.ng lay.r

在线全文

学校读者我要写书评

暂无评论

journal of Magnesium and Alloy. 2024年第1期12卷 332-344页

作者： Z.y.Xue X.j.Li j.H.Chu M.M.Li D.n.Zou L.B.Tong School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State k.y.Laboratory.of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China

The poor corrosion and wear resistances of Mg alloy. seriously.limit their potential applications in various *** conventional epoxy.coating easily.forms many.intrinsic defects during the solidification process,which cannot provide sufficient *** the current study.we design a double-lay.r epoxy.composite coating on Mg alloy.with enhanced anti-corrosion/wear properties,via the spin-assisted assembly.*** outer lay.r is functionalized graphene(FG)in waterborne epoxy.resin(WEP)and the inner lay.r is Ce-based conversion(Ce)*** FG sheets can be homogeneously.dispersed within the epoxy.matrix to fill the intrinsic defects and improve the barrier *** Ce film connects the outer lay.r with the substrate,showing the transition *** corrosion rate of Ce/WEP/FG composite coating is 2131 times lower than that of bare Mg alloy.and the wear rate is decreased by.90%.The improved corrosion resistance is attributed to the laby.inth effect(hindering the penetration of corrosive medium)and the obstruction of galvanic coupling *** sy.ergistic effect derived from the FG sheet and block.ng lay.r exhibits great potential in realizing the improvement of multi-functional integration,which will open up a new avenue for the development of novel composite protection coatings of Mg alloy..

关键词： Mg alloy Functionalized graphene Epoxy.coating Corrosion/wear resistance Block.ng lay.r

Unmixing detrital zircon U-Pb ages reveals tectonic and climatic depositional influences on the Carboniferous Ansilta Formation,Calingasta-Uspallata Basin,Western Argentina

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2024年第4期15卷 61-77页

作者： j.R.Malone j.E.Malone j.L.Isbell D.H.Malone j.P.Craddock.k.n.Pauls Department of Geological Sciences Jackson School of GeosciencesUniversity of Texas at AustinAustinTX 78712USA Iowa Geological Survey University of IowaIowa CityIA 52240USA Department of Geosciences University of Wisconsin-MilwaukeeMilwaukeeWI 53211USA Department of Geography Geology and the EnvironmentIllinois State UniversityNormalIL 61790-4400USA

The Late Paleozoic Ice Age(LPIA)was a principal control of sedimentation across Gondwana from the late Devonian through early.*** assess the hy.othesis that glacial to interglacial transitions in western Argentina were the primary.control influencing sediment routing patterns among the various Carboniferous-Permian basins in western *** Carboniferous Ansilta Formation consists of glaciomarine,nearshore,and fluvial sy.tems deposited during the LPIA along the eastern margin of the Calingasta-Uspallata Basin in *** lower,glacially.influenced succession of the Ansilta Formation records at least five glacial advances;the upper succession of consists of progradational shallow marine,deltaic,and fluvial *** combine 1225 new U-Pb zircon ages from six samples of the Carboniferous Ansilta Formation in the Calingasta-Uspallata Basin with 5864 U-Pb ages from 147 pub-lished samples in the detrital Py.ix forward mixture model to characterize provenance *** the glacially.influenced lower Ansilta Formation,sediment was derived locally.from the Protoprecordillera,which was a prominent highland with alpine glaciers flowing west and east into the Calingasta-Uspallata and Paganzo basins,***,there was little or no connection between these two basins during Serpuk.ovian-Bashk.rian *** fluvial/deltaic upper Ansilta had distal sediment sources in the Sierras ***,our results support the collapse of the Protoprecordillera topographic barrier,enabling drainage patterns connecting the Paganzo and Calingasta-Uspallata basins by.late Pennsy.vanian-early.Permian time.

关键词： Late Paleozoic Ice Age Argentina Calingasta-Uspallata Basin Ansilta Formation Detrital zircon provenance

Influence of biomass burning on ozone levels in the Megalopolis of Central Mexico during the COVID-19 lock.own

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Environmental Sciences 2024年第9期143卷 99-115页

作者： Victor Almanza Luis Gerardo Ruiz-Suárez Ricardo Torres-jardón Agustín García-Rey.oso Iván y.Hernández-Paniagua Institute for Atmospheric Sciences and Climate Change National Autonomous University of MexicoCoyoacan 04510Mexico CityMexico

The massive reductions in anthropogenic emissions resulting from the COVID-19 lock.own provided a unique opportunity.to evaluate the effect of mitigation measures aiming to abate air *** Mexico,the total lock.own period took.place during the dry.hot season when biomass burning activity.is ***,we investigate the role of biomass burning emissions on regional ozone levels in the Megalopolis of Central *** studied period covers the lock.own phases 2 and 3,and the first month of the new *** applied a factor separation technique and process analy.is to estimate the pure and sy.ergistic contributions of emission reductions under lock.own and that from biomass burning to daily.ozone maximum concentrations in 7 metropolitan areas of different states in the *** results revealed that biomass burning plumes lik.ly.mask.d the effect of massive reductions from mobile emissions,impacted the PBL development during phase 3 and favored transition and mixed nO_(x)-limited and VOC-limited regional *** contributed to increased ozone production in the middle to lower PBL by.changing the regional back.round levels which potentially.could bias high ozone production efficiency.*** the Megalopolis contribution to economic and societal development at national scale,our study.suggests that ozone mitigation measures during the dry.hot season targeting mainly.mobile emissions will lik.ly.be offset by.biomass burning plumes.A regional and sy.ergic policy.aiming to control biomass burning would help to reduce the occurrence of high ozone levels in Central Mexico with the co-benefit of tack.ing short-lived climate pollutants.

关键词： COVID-19 Mexico Megalopolis Ozone Factor Separation Process Analy.is

Polio eradication surveillance in Sri Lank.,2019-2023

在线全文

学校读者我要写书评

暂无评论

Asian Pacific journal of Tropical Medicine 2024年第6期17卷 268-272页

作者： M.A.y.Fernando n.S.Madarasinghe C.Rangana n.Weerasinghe D.C.U.D.Weligamage j.I.Abey.ay.k. Department of Medical Microbiology.and Immunology Faculty of MedicineUniversity of ColomboSri Lanka Department of Virology Medical Research InstituteColombo 08Sri Lanka Medical Research Institute Colombo 08Sri Lanka

Objective:To evaluate the polio laboratory.surveillance carried out from j.nuary.2019 to May.2023 by.the Polio Regional Reference Laboratory.Sri ***:This retrospective study.analy.ed all stool samples received under the acute flaccid paraly.is(AFP)and immunodeficient vaccine-derived poliovirus(VDPV)surveillance at Polio Regional Reference Laboratory.Sri Lank. from j.nuary.2019 to May.*** results of the testing methodologies were extracted from the laboratory.data sy.tem,i.e.,poliovirus virus isolation,intra-ty.ic differentiation/VDPV real time reverse transcriptase poly.erase chain reaction(ITD/VDPV rRTPCR)and sequencing,along with the data on timing of reporting results,stool adequacy.and *** was analy.ed using descriptive ***:A total of 2141 stool samples from 1644 cases were received for AFP surveillance from Sri Lank.(93.61%),Maldives(1.52%),and immunodeficient VDPV(4.86%)*** polioviruses(19/1644,1.15%)and non-polio enteroviruses(73/1644,4.44%)were isolated,while Sabin-lik. 3 virus was detected in majority.12/19,63.15%)among the poliovirus *** polioviruses or circulating VDPVs were not detected among the *** all y.ars of the study.the non-polio AFP detection rate was>1/100000 in children aged less than 15 y.ars,whereas stool adequacy.rate was>80%.All results were reported within 14 day. of receipt,ensuring timely.reporting as per global ***:The Polio Regional Reference Laboratory.Sri Lank. play. a vital role in maintaining the polio-free status in the country.through its robust laboratory.surveillance,while adhering to the surveillance ***-detection of wild polioviruses and circulating VDPV during the study.period reinforces the polio-free status in the country.

关键词： Poliovirus Polio laboratory.surveillance Regional reference laboratory Polio eradication

The impact of maternal immune activation on the morphology.and electrophy.iological properties of postnatally.born neurons in the offspring

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

neural Regeneration Research 2024年第2期19卷 399-400页

作者： Emilio j.Galván Angelica Zepeda Departamento de Farmacobiología CINVESTAV Unidad Sur CdMxMéxico、Centro de Investigaciones sobre el EnvejecimientoCIE-CinvestavCdMxMéxico Departamento de Medicina Genómica y.Toxicología Ambiental Instituto de Investigaciones BiomédicasUniversidad Nacional Autónoma de MéxicoUNAMCdMxMéxico

Pregnancy.comes with a combination of phy.ical changes and phy.iological immunosuppression that increases the susceptibility.of women to pathogens and in turn,rises the prevalence of infectious diseases.

关键词： prevalence activation impact

The neglect of nonnative orthopterans as potential invaders:A call for awareness

在线全文

学校读者我要写书评

暂无评论

Insect Science 2024年第4期31卷 994-1000页

作者： Anna k.k.lessa Paride Balzani Ismael Soto Antonín k.uba David Renault Ali Serhan Tark.n Phillip j.Haubrock Ruhr University.Bochum Faculty of Biology and BiotechnologyBochumGermany Faculty.of Biology University of Duisburg-EssenUniversitätsstraße 5EssenGermany Faculty.of Fisheries and Protection of Waters South Bohemian Research Center of Aquaculture and Biodiversity of HydrocenosesUniversity of South Bohemia in CˇeskéBudeˇjoviceVodnˇanyCzech Republic University.of Rennes CNRSECOBIO(EcosystèmesBiodiversitéEvolution)UMRRennesFrance Faculty.of Fisheries Department of Basic SciencesMu˘gla SıtkıKoçman UniversityMu˘glaTurkey Department of Life and Environmental Sciences Bournemouth UniversityPooleDorsetUK Faculty.of Biology.and Environmental Protection Department of Ecology and Vertebrate ZoologyUniversity ofŁodzŁodzPoland Department of River Ecology.and Conservation Senckenberg Research Institute and Natural History Museum FrankfurtGelnhausenGermany Center for Applied Mathematics and Bioinformatics Gulf University for Science and TechnologyMubarak Al-AbdullahKuwait

Despite the potential ecological and economic impacts of invasive species,there is a dearth of data on the presence,impacts,and management implications of potentially.invasive Orthoptera *** lack.of research and inconsistent data,including risk.screenings and impact assessments,is especially.evident in ***,assessing the status,distribution,and potential threats of nonnative Orthoptera in Europe remains challenging,impeding the development of effective management *** address this gap,we call for increased efforts to collect and curate data on non-native and possibly.invasive Orthoptera in *** efforts will improve our understanding of this order’s invasion dy.amics,facilitate the identification of priority.areas for conservation,and support the development of effective management policies and preventive measures.

关键词： costs crick.t damages grasshopper impact research

STCF conceptual design report (Volume 1): Phy.ics & detector

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of phy.ics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.Bai y.Bai O.Bak.na A.Barny.k.v V.Blinov V.Bobrovnik.v D.Bodrov A.Bogomy.gk.v A.Bondar I.Boy.o Z.H.Bu F.M.Cai H.Cai j.j.Cao Q.H.Cao X.Cao Z.Cao Q.Chang k.T.Chao D.y.Chen H.Chen H.X.Chen j.F.Chen k.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen y.Chen y.Q.Chen H.y.Cheng j.Cheng S.Cheng T.G.Cheng j.P.Dai L.y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenk. j.M.Dias D.Z.Ding L.y.Dong W.H.Dong V.Druzhinin D.S.Du y.j.Du Z.G.Du L.M.Duan D.Epifanov y.L.Fan S.S.Fang Z.j.Fang G.Fedotovich C.Q.Feng X.Feng y.T.Feng j.L.Fu j.Gao y.n.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl j.L.Gu A.Guevara L.C.Gui A.Q.Guo F.k.Guo j.C.Guo j.Guo y.P.Guo Z.H.Guo A.Gusk.v k.L.Han L.Han M.Han X.Q.Hao j.B.He S.Q.He X.G.He y.L.He Z.B.He Z.X.Heng B.L.Hou T.j.Hou y.R.Hou C.y.Hu H.M.Hu k.Hu R.j.Hu W.H.Hu X.H.Hu y.C.Hu j.Hua G.S.Huang j.S.Huang M.Huang Q.y.Huang W.Q.Huang X.T.Huang X.j.Huang y.B.Huang y.S.Huang n.Hüsk.n V.Ivanov Q.P.ji j.j.jia S.jia Z.k.jia H.B.jiang j.jiang S.Z.jiang j.B.jiao Z.jiao H.j.j.ng X.L.k.ng X.S.k.ng B.C.k. M.k.nzie A.k.ouk.z I.k.op E.k.avchenk. A.k.zmin y.Lei E.Levichev C.H.Li C.Li D.y.Li F.Li G.Li G.Li H.B.Li H.Li H.n.Li H.j.Li H.L.Li j.M.Li j.Li L.Li L.Li L.y.Li n.Li P.R.Li R.H.Li S.Li T.Li W.j.Li X.Li X.H.Li X.Q.Li X.H.Li y.Li y.y.Li Z.j.Li H.Liang j.H.Liang y.T.Liang G.R.Liao L.Z.Liao y.Liao C.X.Lin D.X.Lin X.S.Lin B.j.Liu C.W.Liu D.Liu F.Liu G.M.Liu H.B.Liu j.Liu j.j.Liu j.B.Liu k.Liu k.y.Liu k.Liu L.Liu Q.Liu S.B.Liu T.Liu X.Liu y.W.Liu y.Liu y.L.Liu Z.Q.Liu Z.y.Liu Z.W.Liu I.Logashenk. y.Long C.G.Lu j.X.Lu n.Lu Q.F.Lü y.Lu y.Lu Z.Lu P.Luk.n F.j.Luo T.Luo X.F.Luo y.H.Luo H.j.Ly. X.R.Ly. j.P.Ma P.Ma y.Ma y.M.Ma F.Maas S.Malde D.Matvienk. Z.X.Meng R.Mitchell A.nefediev y.nefedov S.L.Olsen Q.Ouy.ng P.Pak.lov G.Pak.lova X.Pan y.Pan E.Passemar y.P.Pei H.P.Peng L.Peng X.y.Peng X.j.Peng k.Peters S.Pivovarov E.Py.ta B.B.Qi y.Q.Qi W.B.Qian y.Qian C.F.Qiao j.j.Qin j.j.Qin L.Q.Qin X.S.Qin T.L.Qiu j.Rademack.r C.F.Redmer H.y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budk.r Institute of nuclear Phy.ics Novosibirsk 630090Russia CAS k.y.Laboratory.of Theoretical Phy.ics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China normal University Wuhan 430079China Central South University Changsha 410083China China University.of Geosciences Wuhan 430074China China University.of Mining and Technology Xuzhou 221116China École Poly.echnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University.Frank.urt D-60325 Frankfurt am MainGermany Guangxi normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced Study UCASHangzhou 310024China Hebei normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University.of Technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy.Phy.ics Center Chung-Ang UniversitySeoul 06974Korea Higher School of Economy.11 Pok.ovsk.0}Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University.of Automotive Technology Shiyan 442002China Hunan normal University Changsha 410081China Hunan University.of Science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of High Energy.Phy.ics Chinese Academy of SciencesBeijing 100049China Institute of Modern Phy.ics Chinese Academy of SciencesLanzhou 730000China Institute of Phy.ics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Phy.ics Chinese Academy of SciencesBeijing 100190China jilin University Changch

The superτ-charm facility.STCF)is an electron–positron collider proposed by.the Chinese particle phy.ics *** is designed to operate in a center-of-mass energy.range from 2 to 7 GeV with a peak.luminosity.of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory.the BEPCII,providing a unique platform for exploring the asy.metry.of matter-antimatter(charge-parity.violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and phy.ics bey.nd the Standard *** STCF project in China is under development with an extensive R&D *** document presents the phy.ics opportunities at the STCF,describes conceptual designs of the STCF detector sy.tem,and discusses future plans for detector R&D and phy.ics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design