检索结果-南通市图书馆

Progress of vegetation modelling and future research prospects

Science China Earth Sciences 2024年第9期67卷 2718-2738页

作者： Siqi LI Xu ZHANG Zhengyao lu Jian NI Jianhua lu State Key Laboratory of Tibetan Plateau Earth System Resources and Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China British Antarctic Survey Cambridge CB30ETUnited Kingdom Department of Physical Geography and Ecosystem Science Lund UniversityLund 22362Sweden College of Life Sciences Zhejiang Normal UniversityJinhua 321004China School of Atmospheric Sciences Sun Yat-sen University and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China

Terrestrial vegetation is a crucial component of the Earth system,and its changes not only represent one of the most distinct aspects of climate change but also exert significant feedback within the climate system by exchanging energy,moisture,and carbon *** quantitatively and mechanistically study climate-vegetation feedback,numerical vegetation models have been developed on the theory of ecophysiological constraints on plant functional *** models eventually can simulate vegetation distribution and succession across different spatial and temporal scales,and associated terrestrial carbon cycle processes by categorizing vegetation into biomes according different plant functional types and their associated environmental *** we review the developing history of vegetation models and provide recent advances and future *** 21st century,static vegetation models,as developed statistical models,can only simulate equilibrated characteristics of vegetation *** last several decades,Dynamic Global Vegetation Models(DGVMs)have been developed to simulate instantaneous responses of vegetation to climate change and associated dynamics,and can be coupled with Earth system models to investigate interactions among atmosphere,ocean,and *** are also widely applied to investigate the dynamics accounting for changes in the geographic distribution patterns of land surface vegetation at different spatial and temporal scales and to assess the impacts of terrestrial carbon and water fluxes and land use *** suggest that future vegetation modeling could integrate with machine learning,and explore vegetation transient response and feedback as well as impacts of process hierarchies and human activities on climate and ecosystem.

关键词： Vegetation models DGVMs Ecosystems Plant functional types Plant functional traits

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

钢铁工业表面产品与技术面临的挑战与对策

引用

钢铁 2008年第8期43卷 1-6页

作者：杨立红方园卢金雄上海宝钢股份研究院上海201900

上下游行业和钢铁工业的全球化引起的同质化产品的竞争、用户的其它供应商为降低成本、节省用户工序方面的努力和灵活生产、复杂需求的发展将为带钢表面产品提供新的发展机遇。环保、降低成本、资源和高性能将是带钢表面技术与产品面临... 详细信息

上下游行业和钢铁工业的全球化引起的同质化产品的竞争、用户的其它供应商为降低成本、节省用户工序方面的努力和灵活生产、复杂需求的发展将为带钢表面产品提供新的发展机遇。环保、降低成本、资源和高性能将是带钢表面技术与产品面临的巨大挑战。表面产品的创新需要依靠"工艺创新"。开发新一代连续带钢镀膜技术与产品将是应对这种挑战,提高企业竞争力的最佳途径。表面技术将是未来钢铁企业产品的创新中心,是企业未来竞争力所在。新型表面工艺和产品的工业化实现将可能对钢铁企业和上下游行业的生产工序产生革命性的影响。连续带钢真空镀膜技术正在沿着这一趋势,逐渐进入工业化阶段。

关键词：镀层板挑战新工艺对策趋势真空镀膜

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on electronic density topology of various cluster models of Mg/Al hydrotalcite by density functional theory

引用

Journal of Natural Gas Chemistry 2010年第2期19卷 179-184页

作者： Renqing lu Nina Zhang College of Chemistry and Chemical Engineering China University of Petroleum （East China） Qingdao 266555 Shandong China

The geometry and electronic topology properties of Mg/Al hydrotalcite cluster models were comparatively investigated by means of density functional theory at GGA/DND *** results suggested that cluster model containing seven octahedral cations was the smallest size to be employed to simulate other *** fact that the n＋ charge of cluster models containing n aluminum atoms can reflect electronic properties of anionic clay layer *** bond lengths of clusters can be modified by terminating with or without OH-/H2O groups in terms of principle of bond order conservation.

关键词： hydrotalcite density functional theory cluster model Mg/Al

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Lyman-alpha Solar Telescope(LST) for the ASO-S mission——Ⅲ. data and potential diagnostics

引用

Research in Astronomy and Astrophysics 2019年第11期19卷 79-92页

作者： Li Feng Hui Li Bo Chen Ying Li Roberto Susino Yu Huang Lei lu Bei-Li Ying Jing-Wei Li Jian-Chao Xue Yu-Tong yang Jie hong Jian-Ping Li Jie Zhao Wei-Qun Gan Yan Zhang Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210033China Changchun Institute of Optics FineMechanics and PhysicsChinese Academy of SciencesChangchun 130033China INAF-Turin Astrophysical Observatory via Osservatorio 2010025 Pino TorineseItaly School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Department of Computer Science and Technology Nanjing UniversityNanjing 210023China

The Lyman-alpha Solar Telescope(LST)is one of the three payloads onboard the Advanced Space-based Solar Observatory(ASO-S)*** aims at imaging the Sun from the disk center up to 2.5 R⊙targeting solar eruptions,particularly coronal mass ejections(CMEs),solar flares,prominences/filaments and related phenomena,as well as the fast and slow solar *** most prominent speciality of LST is the simultaneous observation of the solar atmosphere in both Lyαand white light(WL)with high temporospatial resolution both on the solar disk and the inner *** observations in the Lyαline together with traditional WL observations will provide us with many new insights into solar eruptions and solar *** consists of a Solar Corona Imager(SCI)with a field of view(FOV)of 1.1–2.5 R⊙,a Solar Disk Imager(SDI)and a full-disk White-light Solar Telescope(WST)with an identical FOV up to 1.2 R⊙.SCI has a dual waveband in Lyα(121.6±10 nm)and in WL(700±40 nm),while SDI works in the Lyαwaveband of 121.6±7.5 nm and WST works in the violet narrow-band continuum of 360±2.0 *** produce high quality science data,careful ground and in-flight calibrations are *** present our methods for different calibrations including dark field correction,flat field correction,radiometry,instrumental polarization and optical *** on the data calibration,definitions of the data levels and processing procedures for the defined levels from raw data are *** physical diagnostics offer key ingredients to understand ejecta and plasma flows in the inner corona,as well as different features on the solar disk including flares,filaments,***,we are making efforts to develop various tools to detect the different features observed by LST,and then to derive their physical parameters,for example,the electron density and temperature of CMEs,the outflow velocity of the solar wind,and the hydrogen density and mass flows of *** observations and data analyses wi

关键词： Sun:coronal mass ejections(CMEs) Sun:flares Sun:solar wind techniques:calibration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Line defects in monolayer TiSe_(2) with adsorption of Pt atoms potentially enable excellent catalytic activity

引用

Nano Research 2022年第5期15卷 4687-4692页

作者： Zhipeng Song Juxia Yi Jing Qi Qi Zheng Zhili Zhu Lei Tao Yun Cao Yan Li Zhaoyan Gao Ruizi Zhang Li Huang Geng Li Ziqiang Xu Xu Wu Yeliang Wang Chengmin Shen Yu-yang Zhang hongliang lu Xiao Lin Shixuan Du hong-Jun Gao Institute of Physics and University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100190China CAS Center for Excellence in Topological Quantum Computation Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China

Two-dimensional(2D)materials with defects are desired for catalysis after the adsorption of monodispersed noble metal ***-performance catalysts with the absolute value of Gibbs free energy(|△GH|)close to zero,is one of the ultimate goals in the catalytic ***,we report the formation of monolayer titanium selenide(TiSe2)with line *** low-temperature scanning tunneling microscopy/spectroscopy(STM/S)measurements revealed the structure and electronic states of the line *** functional theory(DFT)calculation results confirmed that the line defects were induced by selenium vacancies and the STM simulation was in good agreement with the experimental ***,DFT calculations show that monolayer TiSe_(2) with line defects have good catalytic activity for hydrogen evolution reaction(HER).If the defects are decorated with single Pt atom,the HER catalytic activity will be enhanced dramatically(|△GH|=0.006 eV),which is much better than Pt metal(|△GH|=0.09 eV).Line defects in monolayer TiSe_(2)/Au(111)provide a wonderful platform for the design of high-performance catalysts.

关键词： line defects hydrogen evolution reaction monolayer titanium selenide(TiSe_(2)) scanning tunneling microscope density functionaltheorycalculation

来源：

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

A New Global Solar-induced Chlorophyll Fluorescence(SIF)Data Product from TanSat Measurements

引用

Advances in Atmospheric Sciences 2021年第3期38卷 341-345页

作者： lu YAO Dongxu yang Yi LIU Jing WANG Liangyun LIU Shanshan DU Zhaonan CAI Naimeng lu Daren LYU Maohua WANG Zengshan YIN Yuquan ZHENG Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijing 100094China National Satellite Meteorological Center China Meteorological AdministrationBeijing 100081China Changchun Institute of Optics Fine Mechanics and PhysicsChangchun 130033China Shanghai Engineering Center for Microsatellites Shanghai 201210China

The Chinese Carbon Dioxide Observation Satellite Mission(TanSat)is the third satellite for global CO2 monitoring and is capable of detecting weak solar-induced chlorophyll fluorescence(SIF)signals with its advanced technical *** on the Institute of Atmospheric Physics Carbon Dioxide Retrieval Algorithm for Satellite Remote Sensing(IAPCAS)platform,we successfully retrieved the TanSat global SIF product spanning the period of March 2017 to February 2018 with a physically based *** paper introduces the new TanSat SIF dataset and shows the global seasonal SIF maps.A brief comparison between the IAPCAS TanSat SIF product and the data-driven SVD(singular value decomposition)SIF product is also performed for follow-up algorithm *** comparative results show that there are regional biases between the two SIF datasets and the linear correlations between them are above 0.73 for all *** future SIF data product applications and requirements for SIF space observation are discussed.

关键词： TanSat solar-induced chlorophyll fluorescence retrieval algorithm remote sensing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Development of Real-time Vector Receiver on Hardware Platform and the Assessment of Anti-spoofing Capability

The Development of Real-time Vector Receiver on Hardware Pla...

引用

第九届中国卫星导航学术年会

作者： Xinran Zhang hong Li Chun yang Li He Mingquan lu ChinaAcademyofEngineeringPhysics DepartmentofElectronicEngineering TsinghuaUniversity

Anti-spoofing technology is currently a hot spot in the field of navigation. In comparison with the traditional GNSS receiver, vector receiver takes the advantage of the coupling of satellite signals

关键词： vector receiver real-time spoofing attack anti-spoofing

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

生猪养殖场无线传感器网络路径损耗模型的建立与验证（英文）

引用

农业工程学报 2017年第2期33卷 205-212页

作者：朱虹李爽郑丽敏杨璐中国农业大学信息与电气工程学院北京100083 中国农业大学食品质量与安全北京实验室北京100083

研究无线信号在生猪养殖环境中的传播特性,可以对无线传感器网络的路径损耗进行预测,从而为网络的部署奠定基础。研究采用ZigBee无线传感网络技术,通过在生猪养殖场中实际测试了有障碍物情况下,无线信号的丢包率和接收信号的功率强度,... 详细信息

研究无线信号在生猪养殖环境中的传播特性,可以对无线传感器网络的路径损耗进行预测,从而为网络的部署奠定基础。研究采用ZigBee无线传感网络技术,通过在生猪养殖场中实际测试了有障碍物情况下,无线信号的丢包率和接收信号的功率强度,进而得出路径损耗值,以及障碍物的衰减因子,并进行了回归分析。研究表明,墙体衰减因子随墙壁数量增加而增大,植株衰减因子随天线架设高度升高而减小。最终模型的路径损耗参数为2.02,路径损耗的基础损耗为63.602,以混凝土墙为障碍物时,其衰减因子大小为2.64。将障碍物的衰减因子综合添加在经验模型中,可以有效的预测路径损耗值。

关键词：无线传感器网络模型猪场路径损耗 RSSI 生猪养殖

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Preparation for Human B7-2 and DC Vaccines and their Roles in Anti-tumor Immunity Against Esophageal CancerIn Vitro

引用

生物医学工程学杂志 2005年第S1期22卷 111-112页

作者： Jing lu Jun ZHAO Guo-Qiang ZHAO hong-Yan yang You-Tian HUANGMing-Yao ZHAO Zi-Ming DONG(Department of Pathophysiology, Medical College of Zhengzhou University, Zhengzhou 450052,China) Department of Pathophysiology Medical College of Zhengzhou University Zhengzhou 450052 China

1 IntroductionB7-2 molecule is the initial co-stimulatory ligand expressed on APC by its abundant, early and easily induced expression pattern, which so is known as its important role at the initial stage of the immune response. Some tumor cells can not express B7-2 or its expression is low,which leads to tumor's immune escape. Dendritic cells(DC) is the most powerful professional antigen presenting cells(APC), and can activate naive or resting T *** cellular immunity response activated by DC plays a key role in anti-tumor biology therapy. In our research,we prepared human B7-2 and DC vaccines and used them together in vitro to study the anti-tumor immunity effect against esophageal cancer.

关键词： DC The Preparation for Human B7-2 and DC Vaccines and their Roles in Anti-tumor Immunity Against Esophageal CancerIn Vitro APC

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Novel QTL qTGW3 Encodes the GSK3/ SHAGGY-Like Kinase OsGSK5/OsSK41 that Interacts with OsARF4 to Negatively Regulate Grain Size and Weight in Rice

引用

Molecular Plant 2018年第5期11卷 736-749页

作者： Zejun Hu Sun-Jie lu Mei-Jing Wang Haohua He Le Sun hongru Wang Xue-Huan Liu Ling Jiang Jing-Liang sun Xiaoyun Xin Wei Kong Chengcai Chu hong-Wei Xue Jinshui yang Xiaojin luo Jian-Xiang Liu State Key Laboratory of Genetic Engineering Institute of Plant Biology School of Life Sciences Fudan University Shanghai 200433 China Key Laboratory of Crop Physiology Ecology and Genetic Breeding Ministry of Education Jiangxi Agricultural University Nanchang 330045 China State Key Laboratory of Plant Genomics National Center for Plant Gene Research (Beijing) Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China State Key Laboratory of Plant Physiology and Biochemistry College of Life Sciences Zhejiang University Hangzhou 310027 China

Grain size and shape are important determinants of grain weight and yield in rice. Here, we report a new major quantitative trait locus （QTL）, qTGW3, that controls grain size and weight in rice. This locus, qTGW3, encodes OsSK41 （also known as OsGSK5）, a member of the GLYCOGEN SYNTHASE KINASE 3/SHAGGY-like family. Rice near-isogenic lines carrying the loss-of-function allele of OsSK41 have increased grain length and weight. We demonstrate that OsSK41 interacts with and phosphorylates AUXIN RESPONSE FACTOR 4 （OsARF4）. Co-expression of OsSK41 with OsARF4 increases the accumulation of OsARF4 in rice protoplasts. Loss of function of OsARF4 results in larger rice grains. RNA-sequencing analysis suggests that OsARF4 and OsSK41 repress the expression of a common set of downstream genes, including some auxin-responsive genes, during rice grain development. The loss-of-function form of OsSK41 at qTGW3 represents a rare allele that has not been extensively utilized in rice breeding. Suppression of OsSK41 function by either targeted gene editing or QTL pyramiding enhances rice grain size and weight. Thus, our study reveals the important role of OsSK41 in rice grain development and provides new candidate genes for genetic improvement of grain yield in rice and perhaps in other cereal crops.

关键词： QTL mapping GSK3-like family protein OsGSK5 OsARF4 grain size and weight Oryza sativa

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：