检索结果-南通市图书馆

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

人类排放情景的设计与全球变暖预估

气候变化研究进展 2024年第2期20卷 261-264页

作者：赵宗慈罗勇黄建斌清华大学地球系统科学系北京100084 中国气象局国家气候中心北京100081 中国科学院大学资源环境学院北京100049

1气候变化的原因全球气候变化除地球系统内部变率外,自然强迫和人为强迫是重要的外部驱动力。其中自然强迫包括太阳活动和火山活动。人为强迫即人类活动,包括大量化石燃料燃烧排放温室气体、土地利用,以及气溶胶与污染排放等,其强度取... 详细信息

1气候变化的原因全球气候变化除地球系统内部变率外,自然强迫和人为强迫是重要的外部驱动力。其中自然强迫包括太阳活动和火山活动。人为强迫即人类活动,包括大量化石燃料燃烧排放温室气体、土地利用,以及气溶胶与污染排放等,其强度取决于人口发展与变化、社会经济发展、技术变化及其内部的协调性等。本文重点给出人类强迫的影响。IPCC第六次评估报告明确表明,近百年特别是近几十年来观测到的全球变暖归因为人类活动的影响。

关键词：太阳活动火山活动排放情景全球变暖社会经济发展全球气候变化人类强迫变率

Quantified evaluation of particle shape effects from micro-to-macro scales for non-convex grains

在线全文

学校读者我要写书评

暂无评论

Particuology 2016年第2期14卷 23-35页

作者： y. y.ng j.F. Wang y.M. Cheng Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hong Kong China Department of Civil and Architectural Engineering City University of Hong Kong Hong Kong China

Particle shape play. an important role in both the micro and macro scales responses of a granular assem- bly. This paper presents a sy.tematic way.to interpret the shape effects of granular material during quasi-static shearing. A more suitable shape descriptor is suggested for the quantitative analy.is of the macroscale strength indexes and contact parameters for non-convex grains, with special consid- eration given to the peak state and critical state. Through a series of numerical simulations and related post-processing analy.is, particle shape is found to directly.influence the strain localisation patterns, microscale fabric distributions, microscale mobilisation indexes, and probability.distribution of the nor- malised contact normal force. Additionally. the accuracy.of the stress-force-fabric relationship can be influenced by.the average normal force and the distribution of contact vectors. Moreover, particle shape play. a more important role than do the confining pressures in determining the friction angle. Strong force chains and the dilation effect are also found to be strongly.influenced by.the high confinin~ oressure.

关键词： Quantitative analy.is Shape factor Statistical analy.is Micro-macro indexes

Ground-based and additional science support for SMILE

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

Earth and Planetary.Phy.ics 2024年第1期8卷 275-298页

作者： j.A.Carter M.Dunlop C.Forsy.h K.Oksavik E.Donovon A.Kavanagh S.E.Milan T.Sergienko R.C.Fear D.G.Sibeck M.Connors T.y.oman X.Tan M.G.G.T.Tay.or K.McWilliams j.Gjerloev R.Barnes D.D.Billet G.Chisham A.Dimmock M.P.Freeman D.-S.Han M.D.Hartinger S.-y.W.Hsieh Z.-j.Hu M.K.james L.juusola K.Kauristie E.A.Kronberg M.Lester j.Manuel j.Matzka I.McCrea y.Miy.shi j.Rae L.Ren F.Sigernes E.Spanswick K.Sterne A.Steuwer T.Sun M.-T.Walach B.Walsh C.Wang j.Wey.and j.Wild j.y.n j.Zhang Q.-H.Zhang Planetary.Sciences Group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appleton Laboratory.Space Science Technology Facilities CouncilOxfordshireUK School of Space and Environment Beihang UniversityBeijing 100191China Key.Laboratory.of Space Environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100017China Department of Space and Climate Phy.ics UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK Birkeland Centre for Space Science Department of Physics and Technology.University of BergenBergenNorway Department of Phy.ics and Astronomy University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 British Antarctic Survey CambridgeUK Swedish Institute of Space Phy.ics KirunaSweden West Highfield Campus University of SouthamptonUniversity RoadSO171BJUK Goddard Space Flight Center NASAGreenbeltMarylandUSA Athabasca University AthabascaCanada ESTEC European Space AgencyNetherlands University.of Saskatchewan SaskatoonCanada The johns Hopkins University.Applied Phy.ics Laboratory LaurelMarylandUSA Swedish Institude of Space Phy.ics UppsalaSE 75121Sweden Tongji University Shanghai 200092China Center for Space Plasma Phy.ics Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Polar Research Institute of China Shanghai 200136China Finnish Meteorological Institute(FMI) Finland Department of Earth and Environmental Sciences(Geophy.ics) Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany Canadian Space Agency MontrealCanada GFZ German Research Centre for Geosciences PotsdamGermany Nagoy. University Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northumbria University Newcastle upon TyneTyne and WearUK NE18ST National Space Science Center Chinese Academy SciencesBeijing 100190China Arctic Geophy.ics University Centre in Svalbard

The joint European Space Agency.and Chinese Academy.of Sciences Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)mission will explore global dy.amics of the magnetosphere under vary.ng solar wind and interplanetary.magnetic field conditions,and simultaneously.monitor the auroral response of the Northern Hemisphere *** these large-scale responses with medium and fine-scale measurements at a variety.of cadences by.additional ground-based and space-based instruments will enable a much greater scientific impact bey.nd the original goals of the SMILE ***,we describe current community.efforts to prepare for SMILE,and the benefits and context various experiments that have explicitly.expressed support for SMILE can offer.A dedicated group of international scientists representing many.different experiment ty.es and geographical locations,the Ground-based and Additional Science Working Group,is facilitating these *** include constructing an online SMILE Data Fusion Facility.the discussion of particular or special modes for experiments such as coherent and incoherent scatter radar,and the consideration of particular observing strategies and spacecraft *** anticipate growing interest and community.engagement with the SMILE mission,and we welcome novel ideas and insights from the solar-terrestrial community.

关键词： magnetosphere ionosphere magnetosphere-ionosphere coupling ground-based experimentation SMILE conjunctions missions

Effects of low molecular weight poly.accharide from Sargassum thunbergii against palmitic acid-induced intracellular lipid accumulation in 3T3-L1 adipocy.e and HepG2 cells

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年第4期13卷 2244-2252页

作者： Hy.-Geun lee D.P.Nagahawatta M.j.M.S.Kurera Ky.ng-Mo Song y.n-Sang Choi y.u-jin jeon Min-Cheol Kang Department of Marine Life Sciences Jeju National UniversityJeju 63243Republic of Korea Department of Biotechnology Faculty of Agriculture and Plantation ManagementWayamba University of Sri LankaMakanduraGonawila(NWP)60170Sri Lanka Research Group of Food Processing Korea Food Research Institute245Wanju 55365Republic of Korea

Low molecular weight poly.accharides can be isolated from Sargassum thunbergii(LMPST)and in vitro experiments were conducted to evaluate the inhibitory.effects on *** natures of LMPST were attained from *** and appraised their LMPST on palmitic acid(PA)induced lipid accretion in Hep G2,and 3T3-L1 *** treatment lessened lipid deposition and intracellular free fatty.acid and trigly.eride intensities in PA-treated above mentioned *** mechanistic study.publicized that LMPST2 significantly.suppressed adipogenesis and stimulated the PA-treated 3T3-L1 cells occupied in the lipoly.is ***,in PA-treated Hep G2 cells,the free fatty.acid oxidation was significantly.increased by.*** these constructive properties of LMPST2 from ***,is a potential candidate for diminishing the intracellular lipids,and for a therapeutic agent in those conditions.

关键词： Sargassum thunbergii Low molecular weight poly.accharide Lipid accumulation Obesity Liver steatosis

Optimization of Mass Bleed Control for Base Drag Reduction of Supersonic Flight Bodies

在线全文

学校读者我要写书评

暂无评论

journal of Thermal Science 2006年第3期15卷 206-212页

作者： y.-K.lee H.-D.Kim School of Mechanical Engineering Andong National University388 Songcheon-dongAndong760-749Korea

The minimization of base drag using mass bleed control is examined in consideration of various base to orifice exit area ratios for a body.of revolution in the Mach 2.47 freestream Axisy.metric, compressible, rmss-averaged Navier-Stokes equations are solved using the standard k-ω model, a fully.implicit finite volume scheme, and a second order upwind scheme. Base flow charcteristics are explained mgaarding the base configuration as well as the injection parameter which is defined as the mass flow rate of bleed jet non-dimensionalized by.the product of the base area and fieestream mass flux. The results obtained through the present study.show that for a smaller base area, the optimum mass bleed condition leading to minimum base drag occurs at relatively.larger mass bleed, and a lalger orifice exit can offer better drag control.

关键词： base drag mass bleed drag reduction separation supersonic flow

风化过程中铼和硒的活动性及其对化石有机碳风化的指示

在线全文

学校读者我要写书评

暂无评论

中国科学：地球科学 2024年第3期54卷 760-770页

作者：张玉红汪进曲远馨朱超金章东中国科学院地球环境研究所黄土与第四纪地质国家重点实验室西安710061 中国科学院大学北京100049 西安地球环境创新研究院西安710061 西安交通大学全球环境变化研究院西安710049

化石有机碳风化是地质时间尺度上重要的碳源,对全球碳循环和气候变化具有重要影响,但如何量化一直是个挑战.河水铼(Re)含量的变化被认为具有示踪流域化石有机碳风化强度的潜力,然而Re的来源及其与化石有机碳风化之间的关系还知之甚少.... 详细信息

化石有机碳风化是地质时间尺度上重要的碳源,对全球碳循环和气候变化具有重要影响,但如何量化一直是个挑战.河水铼(Re)含量的变化被认为具有示踪流域化石有机碳风化强度的潜力,然而Re的来源及其与化石有机碳风化之间的关系还知之甚少.为了更好地认识这一指标的有效性,本文选择重庆市城口县下寒武统水井沱组页岩风化剖面为研究对象,通过元素含量、逐级提取实验等分析,探讨页岩风化序列中Re和硒(Se)的活动性及其与化石有机碳风化的关系.结果表明,化学蚀变指数(CIA)从基岩到风化层逐步升高,指示增强的风化强度.根据逐级提取实验和质量迁移系数(τ)的变化发现,页岩中的Re和Se主要赋存于有机质相,风化过程中与化石有机碳同步流失,而与页岩中的硫化物矿物氧化无明显相关;风化过程中Re和Se不同的地球化学行为导致其与化石有机碳非等量流失.本研究支持Re作为示踪化石有机碳风化的指标,而Se是示踪化石有机碳风化的潜在指标.未来需要不同类型沉积岩剖面与流域相结合的研究,明确河水Re和Se的来源及其与流域化石有机碳风化之间的关系.

关键词： Re和Se 页岩活动性化石有机碳化学风化

Superior antibody.and membrane protein‑specific T‑cell responses to CoronaVac by.intradermal versus intramuscular routes in adolescents

在线全文

学校读者我要写书评

暂无评论

World journal of Pediatrics 2024年第4期20卷 353-370页

作者： jaime S.Rosa Duque Samuel M.S.Cheng Caroly. A.Cohen Daniel Leung Xiwei Wang Xiaofeng Mu y.et Chung Tsun Ming Lau Manni Wang Weny.e Zhang y.nmei Zhang Howard H.W.Wong Leo C.H.Tsang Sara Chaothai Tsz Chun Kwan john K.C.Li Karl C.K.Chan Leo L.H.Luk jenson C.H.Ho Wing y.n Li Amos M.T.lee jennifer H.y.Lam Sau Man Chan Wilfred H.S.Wong Issan y.S.Tam Masashi Mori Sophie A.Valkenburg Malik Peiris Wenwei Tu y. Lung Lau Department of Paediatrics and Adolescent Medicine The University of Hong KongHong KongChina School of Public Health The University of Hong KongHong KongChina HKU‑Pasteur Research Pole School of Public HealthThe University of Hong KongHong KongChina Research Institute for Bioresources and Biotechnology Ishikawa Prefectural UniversityNonoichiJapan Department of Microbiology.and Immunology Peter Doherty Institute for Infectionand ImmunityUniversity of MelbourneMelbourneVICAustralia Center for Immunology.and Infection C2i Hong KongChina

Background Optimising the immunogenicity.of COVID-19 vaccines to improve their protection against disease is *** dosing by.intradermal(ID)administration has been shown to be equally.immunogenic as intramuscular(IM)administration for several vaccines,but the immunogenicity.of ID inactivated whole severe acute respiratory.sy.drome coronavirus 2(SARS-CoV-2)at the full dose is *** study.NCT04800133)investigated the superiority.of antibody.and T-cell responses of full-dose CoronaVac by.ID over IM administration in *** Participants aged 11–17 y.ars received two doses of IM or ID vaccine,followed by.the 3rd dose 13–42 day. *** and cellular immunogenicity.outcomes were measured post-dose 2(IM-CC versus ID-CC)and post-dose 3(IMCCC versus ID-CCC).Doses 2 and 3 were administered to 173 and 104 adolescents,*** Spike protein(S)immunoglobulin G(IgG),S-receptor-binding domain(RBD)IgG,S IgG Fcγreceptor IIIa(FcγRIIIa)-binding,SNM[sum of individual(S),nucleocapsid protein(N),and membrane protein(M)peptide pool]-specific interleukin-2(IL-2)+CD4^(+),SNM-specific IL-2^(+)CD8^(+),S-specific IL-2^(+)CD8^(+),N-specific IL-2^(+)CD4^(+),N-specific IL-2^(+)CD8^(+)and M-specific IL-2^(+)CD4^(+)responses fulfilled the superior and non-inferior criteria for ID-CC compared to IM-CC,whereas IgG avidity.was *** ID-CCC,S-RBD IgG,surrogate virus neutralisation test,90%plaque reduction neutralisation titre(PRNT90),PRNT50,S IgG avidity.S IgG FcγRIIIa-binding,M-specific IL-2^(+)CD4^(+),interferon-γ+CD8^(+)and IL-2^(+)CD8^(+)responses were superior and non-inferior to *** estimated vaccine efficacies were 49%,52%,66%and 79%for IM-CC,ID-CC,IM-CCC and ID-CCC,*** ID groups reported more local,mild adverse *** This is the first study.to demonstrate superior antibody.and M-specific T-cell responses by.ID inactivated SARSCoV-2 vaccination and serves as the basis for future research to improve the

关键词： CoronaVac Coronavirus disease 2019 Immunity Intradermal Vaccine

Effects of Growth Temperature on Structural and Electrical Properties of Li-N-H Codoped ZnO

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

journal of Materials Science & Technology 2013年第2期29卷 154-156页

作者： y.F. Lu Z.Z. y. L.P. Zhu y.j. Zeng j.y. Huang B.H. Zhao State Key.Laboratory.of Silicon Materials Department of Materials Science and Engineering Zhejiang University

Effects of growth temperature on the structural and electrical properties of Li-N-H codoped ZnO thin films grown by.DC reactive magnetron sputtering were investigated. Scanning electron microscopy.and X-ray.diffraction results showed that increasing growth temperature could improve the cry.talline quality. But Hall measurement results showed that growth temperature had a nonlinear influence on the electrical property. The variation of electrical properties with the growth temperature was found to be related to the activated concentration of N in ZnO and the evaporation of Li during the growth process, derived from the Hall measurement and the second ion mass spectroscopy.measurement.

关键词： ZnO Codoped Growth temperature Structural property Electrical property

Modification strategies improving the electrochemical and structural stability.of high-Ni cathode materials

在线全文

学校读者我要写书评

暂无评论

journal of Energy.Chemistry 2024年第9期96卷 185-205页

作者： y.on Bo Sim Hami lee juny.ung Mun Ki jae Kim Department of Energy.Science Sungkyunkwan UniversitySuwon 16419Republic of Korea School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea SKKU Institute of Energy.Science and Technology.SIEST) Sungkyunkwan UniversitySuwon 16419Republic of Korea

With the increasing spotlight in electric vehicles,there is a growing demand for high-energy.density.batteries to enhance driving ***,several studies have been conducted on high-energy.density.LiNi_(x)Co_(y.Mn_(z)O_(2)***,there is a limit to permanent performance deterioration because of side reactions caused by.moisture in the atmosphere and continuous microcracks during cy.ling as the Ni content to express high energy.increases and the content of Mn and Co that maintain structural and electrochemical stabilization *** direct modification of the surface and bulk regions aims to enhance the capacity.and long-term performance of high-Ni cathode ***,an efficient modification requires a study.based on a thorough understanding of the degradation mechanisms in the surface and bulk *** this review,a comprehensive analy.is of various modifications,including doping,coating,concentration gradient,and single cry.tals,is conducted to solve degradation issues along with an analy.is of the overall degradation mechanism occurring in high-Ni cathode *** also summarizes recent research developments related to the following modifications,aims to provide notable points and directions for post-studies,and provides valuable references for the commercialization of stable high-energy.density.cathode materials.

关键词： High energy.density High-Ni cathode materials Degradation Structural stability Lithium-ion battery