检索结果-南通市图书馆

Simulating the exchanges of carbon dioxide, water vapor and heat over Changbai Mountains temperate broad- leaved Korean pine mixed forest ecosystem

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science china Earth sciences 2005年第Z1期48卷 148-159页

作者： WANG Qiufeng, NIU dong, yu Guirui, REN Chuanyou, WEN Xuefa, chen Jingming & JU Weimin {3. of Geographic sciences and Natural Resources Research, chinese academy of sciences, beijing 100101, china Bureau of Science and Technology for Resources and Environment, chinese academy of sciences, beijing 100864, china Department of Geography, University of Toronto, Toronto M5S 3.3. Canada graduate school of the chinese academy of sciences, beijing 10003., china Shenyang Agricultural University, Shenyang 100161, china institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China graduate school of the chinese academy of sciences Beijing 100039 China Bureau of Science and Technology for Resources and Environment Chinese Academy of Sciences Beijing 100864 China institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China graduate school of the chinese academy of sciences Beijing 100039 China Shenyang Agricultural University Shenyang 100161 China Department of Geography University of Toronto Toronto M5S 3G3 Canada

A process-based ecosystem productivity model BEPS (Boreal Ecosystem Productivity Simulator) was updated to simulate half-hourly exchanges of carbon, water and energy between the atmosphere and terrestrial ecosystem at a temperate broad-leaved Korean pine forest in the Changbai Mountains, china. The BEPSh model is able to capture the diurnal and seasonal variability in carbon dioxide, water vapor and heat fluxes at this site in the growing season of 2003. The model validation showed that the simulated net ecosystem productivity (NEP), latent heat flux (LE), sensible heat flux (Hs) are in good agreement with eddy covariance measurements with an R2 value of 0.68, 0.86 and 0.72 for NEP, LE and Hs, respectively. The simulated annual NEP of this forest in 2003.was 3.0.5 gC/m2, and was very close to the observed value. Driving this model with different climate scenarios, we found that the NEP in the Changbai Mountains temperate broad-leaved Korean pine mixed forest ecosystem was sensitive to climate variability, and the current carbon sink will be weakened under the condition of global warming. Furthermore, as a process-based model, BEPSh was also sensitive to physiological parameters of plant, such as maximum Rubisco activity (Vcmax) and the maximum stomatal conductance (gmax), and needs to be carefully calibrated for other applications.

关键词： carbon cycle, water cycle, BEPSh model, eddy covariance measurement, chinaFLUX.

Roadmap for rechargeable batteries:present and beyond

在线全文

学校读者我要写书评

暂无评论

Science china Chemistry 2024年第1期67卷 13-42页

作者： Sen Xin Xu Zhang Lin Wang Haijun yu Xin Chang yu-Ming Zhao Qinghai Meng Pan Xu chen-Zi Zhao Jiahang chen Huichao Lu Xirui Kong Jiulin Wang Kai chen Gang Huang Xinbo Zhang yu Su Yao Xiao Shu-Lei Chou Shilin Zhang Zaiping Guo Aobing Du Guanglei Cui Gaojing Yang Qing Zhao Liubing dong dong Zhou Feiyu Kang Hu Hong Chunyi Zhi Zhizhang yuan Xianfeng Li Yifei Mo Yizhou Zhu dongfang yu Xincheng Lei Jianxiong Zhao Jiayi Wang dong Su yu-Guo Guo Qiang Zhang Jun chen Li-Jun Wan CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China University of chinese academy of sciences.{3. China institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Chemistry and Utilization of Carbon-Based energy Resources College of ChemistryXinjiang UniversityUrumqi 830046China Department of Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChangchun 130022China institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China school of Chemical Engineering and Advanced Materials The University of AdelaideAdelaide 5000Australia Qingdao Industrial energy Storage Research institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Frontiers Science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China College of Chemistry and Materials Science Jinan UniversityGuangzhou 511443China Tsinghua Shenzhen International graduate school Tsinghua UniversityShenzhen 518055China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China Division of energy Storage Dalian National Laboratory for Clean Energy(DNL)Dalian Institute of Chem

Rechargeable batteries currently hold the largest share of the electrochemical energy storage market,and they play a major role in the sustainable energy transition and industrial decarbonization to respond to global climate *** to the increased popularity of consumer electronics and electric vehicles,lithium-ion batteries have quickly become the most successful rechargeable batteries in the past three decades,yet growing demands in diversified application scenarios call for new types of rechargeable *** efforts are made to developing the next-generation post-Li-ion rechargeable batteries,which include,but are not limited to solid-state batteries,lithium–sulfur batteries,sodium-/potassium-ion batteries,organic batteries,magnesium-/zinc-ion batteries,aqueous batteries and flow *** the great achievements,challenges persist in precise understandings about the electrochemical reaction and charge transfer process,and optimal design of key materials and interfaces in a *** roadmap tends to provide an overview about the current research progress,key challenges and future prospects of various types of rechargeable *** computational methods for materials development,and characterization techniques will also be discussed as they play an important role in battery research.

关键词： energy storage rechargeable batteries battery materials electrochemistry

Nucleon Form Factors and N-△ Transitions in a Hypercentral Constituent Quark Model with Meson Cloud

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第3期47卷 539-546页

作者： chen dina-yong {3. yu-bing institute of high energy Physics the Chinese Academy of Sciences Beijing 100049 China Gradtuate school of the chinese academy of sciences Beijing 100049 China

We study the nucleon form factors and the nucleon-△（123.） transitions in a framework of hypercentral constituent quark model. The pion meson cloud effect is taken into account explicitly. Our results show that the pion cloud contributes substantially to the nucleon form factors as well as to the helicity amplitudes of △（123.）, and it gives an improved agreement compared to the experimental.

关键词： electromagnetic form factor nucleon and △(123.) hypercentral constituent quark model meson cloud

Emerging contaminants:A One Health perspective

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Innovation 2024年第4期5卷 140-170,139页

作者： Fang Wang Leilei Xiang Kelvin Sze-Yin Leung Martin Elsner Ying Zhang yuming Guo Bo Pan Hongwen Sun Taicheng An Guangguo Ying Bryan WBrooks Deyi Hou Damian EHelbling Jianqiang Sun Hao Qiu Timothy MVogel Wei Zhang Yanzheng Gao Myrna JSimpson Yi Luo Scott XChang Guanyong Su Bryan MWong Tzung-May Fu {3. Zhu Karl JJobst chengjun Ge Frederic Coulon Jean Damascene Harindintwali Xiankui Zeng Haijun Wang yuhao Fu Zhong Wei Rainer Lohmann Changer chen Yang Song Concepcion Sanchez-Cid yu Wang Ali El-Naggar Yiming Yao Yanran Huang Japhet Cheuk-Fung Law chenggang Gu Huizhong Shen Yanpeng Gao Chao Qin Hao Li Tong Zhang Natàlia Corcoll Min Liu Daniel SAlessi Hui Li Kristian KBrandt Yolanda Pico cheng Gu Jianhua Guo Jianqiang Su Philippe Corvini Mao Ye Teresa Rocha-Santos Huan He Yi Yang Meiping Tong Weina Zhang Fidèle Suanon Ferdi Brahushi Zhenyu Wang Syed AHashsham Marko Virta Qingbin yuan Gaofei Jiang Louis A.Tremblay Qingwei Bu Jichun Wu Willie Peijnenburg Edward Topp Xinde Cao Xin Jiang Minghui Zheng Taolin Zhang yongming Luo Lizhong Zhu Xiang{3. Li DamiàBarceló Jianmin chen Baoshan Xing Wulf Amelung Zongwei Cai Ravi Naidu Qirong Shen Janusz Pawliszyn yong-guan Zhu Andreas Schaeffer Matthias C.Rillig Fengchang Wu Gang yu James M.Tiedje State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of chinese academy of sciences Beijing 100049China Department of Chemistry Hong Kong Baptist UniversityHong KongChina HKBU institute of Research and Continuing Education Shenzhen Virtual University ParkShenzhenChina Technical University of Munich TUM School of Natural SciencesInstitute of Hydrochemistry85748 GarchingGermany school of Resources&Environment Northeast Agricultural UniversityHarbin 150030China Climate Air Quality Research UnitSchool of Public Health and Preventive MedicineMonash UniversityMelbourneVICAustralia Faculty of Environmental Science&Engineering Kunming University of Science&TechnologyKunming 650500China Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control School of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Ministry of Education Key Laboratory of Environmental Theoretical Chemistry South China Normal UniversityGuangzhouGuangdong 510006China Department of Environmental Science Baylor UniversityWacoTXUSA Center for Reservoir and Aquatic Systems Research(CRASR) Baylor UniversityWacoTXUSA school of Environment Tsinghua UniversityBeijing 100084China school of Civil and Environmental Engineering Cornell UniversityIthacaNY 14853USA Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province Zhejiang University of TechnologyHangzhou 310014China school of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Laboratoire d’Ecologie Microbienne Universite Claude Bernard Lyon 1UMR CNRS 5557UMR INRAE 1418VetAgro Sup69622 VilleurbanneFrance Department of Pla

Environmental pollution is escalating due to rapid global development that often prioritizes human needs over planetary *** global efforts to mitigate legacy pollutants,the continuous introduction of new substances remains a major threat to both people and the *** response,global initiatives are focusing on risk assessment and regulation of emerging contaminants,as demonstrated by the ongoing efforts to establish the UN’s Intergovernmental Science-Policy Panel on Chemicals,Waste,and Pollution *** review identifies the sources and impacts of emerging contaminants on planetary health,emphasizing the importance of adopting a One Health *** for monitoring and addressing these pollutants are discussed,underscoring the need for robust and socially equitable environmental policies at both regional and international *** actions are needed to transition toward sustainable pollution management practices to safeguard our planet for future generations.

关键词： pollution planet contaminants

Experimental Study of p-^(11)B Reaction Related to the Clean Fusion Fuel

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

chinese Physics Letters 1998年第11期15卷 796-798页

作者： LIN Erh-kang WANG Chang-wan yuAN Jian LIU Xiao-dong LI cheng-bo SUN Zu-xun ZHANG Pei-hua chen Jin-xiang YANG Qi-xiang WANG Jian-yong Gong Ling-hua institute of Physics Academia SinicaTaipei 11529 china institute of Atomic energy Beijing 102413 graduate school Chinese Academy of SciencesBeijing 100039 institute of Heavy Ion Physics Peking UniversityBeijing 100871

Whole continuous a spectra of the p-^(11)B three-body sequential decay reaction have been measured by using a charge particle time-of-flight(TOF)spectrometer with the high-resolution passivated implanted planar silicon detector.A characteristic shape of the saddle-type distribution was *** Monte Carlo calculations show that observed a spectra can be interpreted by anisotropy sequential decay process of the intermediate nucleus ^(8)Be(1)for the p-^(11)B *** the measurement,angular distributions were obtained for proton energies at 667 and 13.0keV,*** cross-sections for the ^(11)B(p,α)^(8)Be(2α)reaction related to the clean fusion fuel were also reported at two bombarding energies.

关键词： reaction. decay saddle

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

大气中子实时计算模式

空间科学学报 2019年第3期39卷 342-348页

作者：陈善强刘四清陈东林瑞淋师立勤曹勇中国科学院国家空间科学中心北京100190 中国科学院大学北京100049 哈尔滨工业大学深圳研究生院深圳518055

为实时评估0~100km高度范围内的大气中子全球分布,对宇宙线在地磁场和大气中的传输过程进行了分析.利用蒙特卡罗方法工具包Geant 4,预先计算不同能量的粒子在大气层中产生的次级粒子能谱分布,形成大气次级粒子数据库,并与相关模型进行对... 详细信息

为实时评估0~100km高度范围内的大气中子全球分布,对宇宙线在地磁场和大气中的传输过程进行了分析.利用蒙特卡罗方法工具包Geant 4,预先计算不同能量的粒子在大气层中产生的次级粒子能谱分布,形成大气次级粒子数据库,并与相关模型进行对比,验证了该数据库的有效性和可靠性.以实测或预报的空间环境参数作为输入,计算同步轨道银河宇宙线和太阳质子事件能谱以及100 km高度上的地磁垂直截止刚度,最终得到大气层顶上的粒子能谱.通过对大气次级粒子数据库的线性插值,实现1h分辨率的大气中子能谱和辐射剂量全球分布的实时计算.

关键词：银河宇宙线太阳质子事件大气中子 Geant 4 有效剂量

Co13.8—metalloxocubes:a new class of perovskite-like neutral clusters with cubic aromaticity

在线全文

学校读者我要写书评

暂无评论

National Science Review 2021年第1期8卷 89-97页

作者： Lijun Geng Mouyi Weng Cong-Qiao Xu Hanyu Zhang Chaonan Cui Haiming Wu Xin chen Mingyu Hu Hai Lin Zhen-{3. Sun Xi Wang Han-Shi Hu Jun Li Jiaxin Zheng Zhixun Luo Feng Pan Jiannian Yao beijing National Laboratory for Molecular sciences (BNLMS) State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences school of Physics Shandong University school of Advanced Materials Peking University Shenzhen Graduate School Department of Chemistry Southern University of Science and Technology University of chinese academy of sciences school of Physics and Electrical Engineering Kashi University College of Science Beijing Jiaotong University Department of Chemistry and Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education Tsinghua University

Exploring stable clusters to understand structural evolution from atoms to macroscopic matter and to construct new materials is interesting yet challenging in chemistry. Utilizing our newly developed deep-ultraviolet laser ionization mass spectrometry technique, here we observe the reactions of neutral cobalt clusters with oxygen and find a very stable cluster species of Co13.8that dominates the mass distribution in the presence of a large flow rate of oxygen gas. The results of global-minimum structural search reveal a unique cubic structure and distinctive stability of the neutral Co13.8cluster that forms a new class of metal oxides that we named as ‘metalloxocubes’. Thermodynamics and kinetics calculations illustrate the structural evolution from icosahedral Co13.o the metalloxocube Co13.8with decreased energy, enhanced stability and aromaticity. This class of neutral oxygen-passivated metal clusters may be an ideal candidate for genetic materials because of the cubic nature of the building blocks and the stability due to cubic aromaticity.

关键词： metalloxocube oxygen-passivated metal cluster cubic aromaticity cluster materials magnetic property

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于变量选择的尖点突变模型的两步构建方法

工程科学学报 2023年第1期45卷 128-136页

作者：张明付冬梅程学群杨丙坤郝文魁陈云邵立珍北京科技大学顺德研究生院佛山528300 北京科技大学自动化学院北京100083 北京科技大学北京市工业波谱成像工程技术研究中心北京100083 北京科技大学新材料技术研究院北京100083 北京科技大学国家材料腐蚀与防护科学数据中心北京100083 全球能源互联网研究院有限公司先进输电技术国家重点实验室北京102209

突变是工程实践过程中广泛存在的现象.当系统的状态发生跳跃性变化时,基于微积分的传统数学建模方法精度较低,人工神经网络等机器学习算法无法对突变现象作出合理的解释.基于突变理论的尖点突变模型可以用来解释系统状态的不连续变化,... 详细信息

突变是工程实践过程中广泛存在的现象.当系统的状态发生跳跃性变化时,基于微积分的传统数学建模方法精度较低,人工神经网络等机器学习算法无法对突变现象作出合理的解释.基于突变理论的尖点突变模型可以用来解释系统状态的不连续变化,然而在输入变量维度较大的情况下,传统的尖点突变模型复杂度高且精度较差.为了解决这一问题,提出了一种基于变量选择的尖点突变模型的两步构建方法.第一步,利用多模型集成重要变量选择算法(MEIVS)量化待选变量的重要性并提取重要变量;第二步,基于极大似然法(MLE)利用所提取的重要变量构建尖点突变模型.仿真结果表明,在具有突变特征的数据集上,通过MEIVS降维后的尖点突变模型在评价指标上优于线性模型、Logistic模型和通过其他方法降维的尖点突变模型,并且可以用来解释研究对象的不连续变化.

关键词：突变理论突变特征尖点突变模型变量选择模型集成

Synergetic roadmap of carbon neutrality and clean air for china

在线全文

学校读者我要写书评

暂无评论

Environmental Science and Ecotechnology 2023年第4期16卷 1-25页

作者： Qiang Zhang Zhicong Yin Xi Lu Jicheng Gong yu Lei Bofeng Cai Cilan Cai Qimin Chai Huopo chen Hancheng Dai Zhanfeng dong Guannan Geng Dabo Guan Jianlin Hu Cunrui Huang Jianing Kang Tiantian Li Wei Li yongsheng Lin Jun Liu Xin Liu Zhu Liu Jinghui Ma Guofeng Shen Dan Tong Xuhui Wang Xuying Wang Zhili Wang Yang Xie Honglei Xu Tao Xue bing Zhang Da Zhang Shaohui Zhang Shaojun Zhang Xian Zhang Bo Zheng Yixuan Zheng Tong Zhu Jinnan Wang Kebin He Ministry of Education Key Laboratory for Earth System Modelling Department of Earth System ScienceTsinghua UniversityBeijing100084China Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing210044China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China institute for Carbon Neutrality Tsinghua UniversityBeijing100084China State Key Joint Laboratory for Environment Simulation and Pollution Control College of Environmental Sciences and Engineering and Center for Environment and HealthPeking UniversityBeijing100871China Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental PlanningBeijing100012China Center for Carbon Neutrality Chinese Academy of Environmental PlanningBeijing100012China National Center for Climate Change Strategy and International CooperationBeijing100035China Nansen-Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China College of Environmental sciences and Engineering Peking UniversityBeijing100871China institute of Environmental Policy Management Chinese Academy of Environmental PlanningBeijing100012China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and EngineeringCollaborative Innovation Center of Atmospheric Environment and Equipment TechnologyNanjing University of Information Science and TechnologyNanjing210044China Vanke school of Public Health Tsinghua UniversityBeijing100084China Center for energy and Environmental Policy Research Beijing Institute of TechnologyBeijing100081China china CDC Key Laboratory of Environment and Population Health National Institute of En

It is well recognized that carbon dioxide and air pollutants share similar emission sources so that synergetic policies on climate change mitigation and air pollution control can lead to remarkable co-benefits on greenhouse gas reduction,air quality improvement,and improved *** the context of carbon peak,carbon neutrality,and clean air policies,this perspective tracks and analyzes the process of the synergetic governance of air pollution and climate change in china by developing and monitoring 18 *** 18 indicators cover the following five aspects:air pollution and associated weather-climate conditions,progress in structural transition,sources,inks,and mitigation pathway of atmospheric composition,health impacts and benefits of coordinated control,and synergetic governance system and *** tracking the progress in each indicator,this perspective presents the major accomplishment of coordinated control,identifies the emerging challenges toward the synergetic governance,and provides policy recommendations for designing a synergetic roadmap of Carbon Neutrality and Clean Air for china.

关键词： Carbon neutrality Clean air Synergetic roadmap