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Space-based information service in Internet Plus Era

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Science China(Information Sciences) 2017年第10期60卷 229-238页

作者： Deren LI xin shen Nengcheng CHEN Zhifeng XIAO State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan University

"Internet Plus" represents a new form of society that provides a vast platform for reform, innovation,and development. Given the continued integration of the Internet in many fields, Internet Plus is profoundly transforming and influencing a variety of traditional industries. Internet Plus has created conditions favorable for the transformation of earth observation and satellite navigation into an intelligent and real-time geospatial information service. The authors propose that in order to implement continuous, all-weather, all-terrain services for the specific purposes of each individual, it will be necessary to overcome the flaws in existing space-based information systems, such as limited regional coverage, slow response, and weak interoperability. Furthermore, to meet the Big Data Era’s geospatial information service requirements, an "Internet Plus Space-Based Information Service" system, intrinsically linked to ground Internet networks, will have to be constructed. With reference to the developments of aerospace information technology, this paper discusses three levels of the proposed structure of the Internet Plus space-based information service system and ideas for its implementation. Finally,in recognition of the demands facing the Internet Plus space-based information service system, the prospects for geomatics and important supporting technologies are examined.

关键词： Internet Plus space-based information service space information network satellite remote sensing satellite navigation satellite communication

Geospatial Information Service Based on Digital Measurable Image——Take Image City·Wuhan as an Example

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Geo-Spatial Information Science 2010年第2期13卷 79-84页

作者： LI Deren shen xin State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University 129Luoyu Road Wuhan 430079 China

t LBS （location-based service） is a remarkable outcome of the development from GIS to geospatial information service. Faced by the requirements of geospatial information from the masses and the opportunity provided by the next generation lnternet and Web 2.0, a new model of geospatial information service based on DMI （digital measurable image） is presented. First, the con- cept of LBS and the opportunities of Web 2.0 are introduced, then the characteristic of DMI is discussed. Taking the Image *** as an example, the function ofgeospatial information service based on DM! is introduced. Finally, the feasibility for its industrialization is discussed.

关键词： location-based service digital measurable image geospatial information service

上海市结核病防治综合管理信息系统的建设、应用与展望

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中国防痨杂志 2025年第1期47卷 18-21页

作者：饶立歆吴哲渊陈静毛丹刘星航沈鑫陈昕上海市疾病预防控制中心结核病与艾滋病防治所结核病防治科上海201107 上海市疾病预防控制中心科研管理处上海201107 上海市疾病预防控制中心疾病预防控制信息所标准和项目管理科上海201107 上海市疾病预防控制中心结核病与艾滋病防治所上海201107 上海市疾病预防控制中心上海201107

随着信息技术的迅猛发展和互联网的广泛普及,信息化建设在传染病防控过程中发挥着越来越重要的作用。上海市结核病管理信息系统自2010年起筹备,于2015年正式投入使用并与国家系统进行数据对接。作者首次总结了上海市在结核病信息化建设... 详细信息

随着信息技术的迅猛发展和互联网的广泛普及,信息化建设在传染病防控过程中发挥着越来越重要的作用。上海市结核病管理信息系统自2010年起筹备,于2015年正式投入使用并与国家系统进行数据对接。作者首次总结了上海市在结核病信息化建设方面的宝贵经验,全面介绍了上海市结核病管理信息系统的总体规划,回顾了十多年来的系统建设、改造和应用情况,并对系统后续的功能扩展、智能化应用等进行展望。

关键词：结核传染病控制管理信息系统

Connected Geomatics in the big data era

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International Journal of Digital Earth 2018年第2期11卷 139-153页

作者： Deren Li xin shen Le Wang State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanPeople’s Republic of China Collaborative Innovation Centre of Geospatial Technology WuhanPeople’s Republic of China School of Resource and Environmental Sciences Wuhan UniversityWuhanPeople’s Republic of China Department of Geography The State University of New York at BuffaloBuffaloNYUSA

The development of global informatization and its integration with industrialization symbolizes that human society has entered into the big data *** article covers seven new characteristics of Geomatics(*** sensor,multi-dimensional dynamics,integration via networking,full automation in real time,from sensing to recognition,crowdsourcing and volunteered geographic information,and serviceoriented science),and puts forward the corresponding critical technical challenges in the construction of integrated space-air-ground geospatial *** the discussions outlined in this paper,we propose a new development stage of Geomatics entitled‘Connected Geomatics,’which is defined as a multi-disciplinary science and technology that uses systematic approaches and integrates methods of spatio-temporal data acquisition,information extraction,network management,knowledge discovery,and spatial sensing and recognition,as well as intelligent location-based services pertaining to any physical objects and human activities on the *** is envisioned that the advancement of Geomatics will make a great contribution to human sustainable development.

关键词： Big data Geomatics smart earth spatial data mining cloud computing spatial sensing and recognition

The Ruin Probability of the Renewal Model with Constant Interest Force and Upper-tailed Independent Heavy-tailed Claims

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Acta Mathematica Sinica,English Series 2010年第9期26卷 1815-1826页

作者： xin Mei shen Zheng Yan LIN Department of Mathematics Zhejiang University Hangzhou 310027 P. R. China

In this paper, we obtain the uniform estimate for discounted aggregate claims in the continuous-time renewal model of upper-tailed independent and heavy-tailed random variables. With constant interest force and constant premium rate, we establish a uniform simple asymptotic formula for ruin probability of the renewal model in the case where the initial surplus is large.

关键词： Asymptotic estimate consistent variation renewal process upper-tail independent

Driving mechanisms of nitrogen transport and transformation in lacustrine wetlands

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Science China Earth Sciences 2016年第3期59卷 464-476页

作者： ZHAO Shan ZHOU Nian Qing shen xin Ping Department of Hydraulic Engineering Tongji UniversityKey Laboratory of Yangtze River Water Environment Ministry of Education Shanghai 200092 China School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA Dongting Lake Water Resources Administration Bureau of Hunan Province Changsha 410007 China

As an essential component of proteins and genetic material for all organisms, nitrogen(N) is one of the major limiting factors that control the dynamics, biodiversity and functioning of lacustrine wetlands, in which intensified N biogeochemical activities take place. Reactive N loaded into wetland ecosystems has been doubled due to various human activities, including industrial, agricultural activities and urbanization. The main driving mechanisms of N transport and transformation in lacustrine wetlands are categorized to pushing forces and pulling forces in this study. Geomorphology, wetland age, N concentrations, and temperature are the main pushing forces(passive forces); whereas water table variation, oxygen concentration, other elements availability, oxidation-reduction potential(Eh) and p H, and microorganisms are the predominant pulling forces(active forces). The direction and kinetic energy of reactions are determined by pulling forces and then are stimulated by pushing forces. These two types of forces are analyzed and discussed separately. Based on the analysis of driving mechanisms, possible solutions to wetland N pollutions are proposed at individual, regional and global scales, respectively. Additional research needs are addressed to obtain a thorough understanding of N transport and transformations in wetlands and to reduce detrimental impacts of excessive N on such fragile ecosystems.

关键词： Nitrogen Driving mechanisms Transport and transformation Excessive loading Lacustrine wetlands

A novel Zn-PANI dry rechargeable battery

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Rare Metals 2006年第Z1期25卷 67-70页

作者： WANG xinsheng JIN xin GU Dawei shen Linjiang College of Science Nanjing University of Technology Nanjing 210009 China College of Science Nanjing University of Technology Nanjing 210009 China College of Science Nanjing University of Technology Nanjing 210009 China College of Science Nanjing University of Technology Nanjing 210009 China

Conducting polyaniline (PANI) powder was well mixed with graphite and acetylene black to obtain the optimum conductivity and porosity. The mixed powder was compressed into a pellet for cathode. Zinc powder was mixed with some metal powder, and compressed into a pellet used as the anode. The electrolyte comprised ZnCl2, NH4Cl, Triton-X100 and PVA at pH 3. The battery has an open-circuit voltage of 1.44 V. The battery underwent charge-discharge cycle with a constant current density of 3 mA·cm-2, within the voltage range of 0.40-1.68 V. It is found that the capacity of the battery is related to the charge-discharge cycles, the maximum capacity is 67.9 mAh·g-1, and Coulombic efficiency is between 95% and 100%. The battery stability was also investigated after 78 d of standing without use. It is found that the battery experiences a self-discharge of less than 0.29% per day.

关键词： polyaniline rechargeable battery capacity charge-discharge cycle

Ground-based/UAV-LiDAR data fusion for quantitative structure modeling and tree parameter retrieval in subtropical planted forest

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Forest Ecosystems 2022年第5期9卷 674-691页

作者： Reda Fekry Wei Yao Lin Cao xin shen Department of Land Surveying and Geo-informatics The Hong Kong Polytechnic UniversityHung HomHong KongChina The Hong Kong Polytechnic University shenzhen Research Institute ShenzhenChina Co-Innovation Center for Sustainable Forestry Nanjing Forestry UniversityNanjing210037China

Light detection and ranging(LiDAR)has contributed immensely to forest mapping and 3D tree *** the perspective of data acquisition,the integration of LiDAR data from different platforms would enrich forest information at the tree and plot *** research develops a general framework to integrate ground-based and UAV-LiDAR(ULS)data to better estimate tree parameters based on quantitative structure modelling(QSM).This is accomplished in three sequential ***,the ground-based/ULS LiDAR data were co-registered based on the local density peaks of the clustered ***,redundancy and noise were removed for the ground-based/ULS LiDAR data ***,tree modeling and biophysical parameter retrieval were based on *** were performed for Backpack/Handheld/UAV-based multi-platform mobile LiDAR data of a subtropical forest,including poplar and dawn redwood ***,ground-based/ULS LiDAR data fusion outperforms ground-based LiDAR with respect to tree parameter estimation compared to field *** fusion-derived tree height,tree volume,and crown volume significantly improved by up to 9.01%,5.28%,and 18.61%,respectively,in terms of *** contrast,the diameter at breast height(DBH)is the parameter that has the least benefits from fusion,and rRMSE remains approximately the same,because stems are already well sampled from ground ***,particularly for dense forests,the fusion-derived tree parameters were improved compared to those derived from ground-based ***-based LiDAR can potentially be used to estimate tree parameters in low-stand-density forests,whereby the improvement owing to fusion is not significant.

关键词： Ground/aerial view mobile LiDAR Point cloud Co-registration Fusion QSM Tree parameter retrieval

Utility and Application of a Versatile Analytical Method for MMF Calculation in AC Machines

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CES Transactions on Electrical Machines and Systems 2024年第1期8卷 22-31页

作者： Ze-Zheng Wu Robert Nilssen Jian-xin shen IEEE the College of Electrical Engineering Zhejiang UniversityHangzhou 310027China the Department of Electric Energy Norwegian University of Science and TechnologyTrondheimNorwayand also affiliated with the College of Electrical EngineeringZhejiang UniversityHangzhou 310027China

A versatile analytical method(VAM) for calculating the harmonic components of the magnetomotive force(MMF) generated by diverse armature windings in AC machines has been proposed, and the versatility of this method has been established in early literature. However, its practical applications and significance in advancing the analysis of AC machines need further elaboration. This paper aims to complement VAM by augmenting its theory, offering additional insights into its conclusions, as well as demonstrating its utility in assessing armature windings and its application of calculating torque for permanent magnet synchronous machines(PMSM). This work contributes to advancing the analysis of AC machines and underscores the potential for improved design and performance optimization.

关键词： AC machine Analytical method Harmonic analysis MMF Magnetic field Torque calculation