This paper reviewed the developments of the last ten years in the field of international high-resolution earth observation, and introduced the developmental status and plans for China's high-resolution earth obser...This paper reviewed the developments of the last ten years in the field of international high-resolution earth observation, and introduced the developmental status and plans for China's high-resolution earth observation program. In addition, this paper expounded the transformation mechanism and procedure from earth observation data to geospatial information and geographical knowledge, and examined the key scientific and technological issues, including earth observation networks, high-precision image positioning, image understanding, automatic spatial information extraction, and focus services. These analyses provide a new impetus for pushing the application of China's high-resolution earth observation system from a "quantity" to "quality" change, from China to the world, from providing products to providing online service.展开更多
The aim of this paper was to identify the trends and hot topics in the study of scientific collaboration via scientometric analysis. Information visualization and knowledge domain visualization techniques were adopted...The aim of this paper was to identify the trends and hot topics in the study of scientific collaboration via scientometric analysis. Information visualization and knowledge domain visualization techniques were adopted to determine how the study of scientific collaboration has evolved. A total of 1,455 articles on scientific cooperation published between 1993 and 2007 were retrieved from the SCI, SSCI and A&HCI databases with a topic search of scientific collaboration or scientific cooperation for the analysis. By using CiteSpace, the knowledge bases, research foci, and research fronts in the field of scientific collaboration were studied. The results indicated that research fronts and research foci are highly consistent in terms of the concept, origin, measurement, and theory of scientific collaboration. It also revealed that research fronts included scientific collaboration networks, international scientific collaboration, social network analysis and techniques, and applications of bibliometrical indicators, webmetrics, and health care related areas.展开更多
针对现有播种机排种技术研究态势缺乏定量分析,热点、重点和难点问题系统性和全面性梳理不充分等问题,该研究对已有排种技术相关文献进行计量学分析,从科研生产力、影响力和发展力等方面可视化呈现排种技术的研究态势,总结排种技术发展...针对现有播种机排种技术研究态势缺乏定量分析,热点、重点和难点问题系统性和全面性梳理不充分等问题,该研究对已有排种技术相关文献进行计量学分析,从科研生产力、影响力和发展力等方面可视化呈现排种技术的研究态势,总结排种技术发展脉络和研究热点,并介绍国内外先进农机企业基于前沿排种技术开发的产品,分析其产业化应用情况和未来发展趋势。结果表明:排种技术呈波浪发展,当前处于高速稳态发展期;中国科研产出较多,影响力紧次于美国;代表性期刊有《Biosystems Engineering》《Computers and Electronics in Agriculture》和《农业工程学报》《农业机械学报》等;高影响力学者和机构围绕不同地区的典型农作物开展排种技术研究,推动了排种技术进步和机械化水平提升;排种技术发展脉络以实现功能为主的单一主题研究逐渐过渡到机构优化、机理分析、虚拟仿真等垂直细分主题的深入探索,现阶段排种技术的研究热点主要集中在高速兼用排种、播种均匀性、DEM-CFD耦合仿真、控制和监测系统开发。排种技术应用注重高效高性能装备研发,国内排种新产品研发处于跟跑阶段;随着新兴技术、多学科交叉融合和创新思维的应用,排种技术研究向高速高性能、精准精确、数字化、智能化等方面发展。研究可为把握排种技术领域研究现状、未来发展趋势和播种机具创新提供参考。展开更多
基金supported by National Basic Research Program of China(Grant No. 2012CB719906)
文摘This paper reviewed the developments of the last ten years in the field of international high-resolution earth observation, and introduced the developmental status and plans for China's high-resolution earth observation program. In addition, this paper expounded the transformation mechanism and procedure from earth observation data to geospatial information and geographical knowledge, and examined the key scientific and technological issues, including earth observation networks, high-precision image positioning, image understanding, automatic spatial information extraction, and focus services. These analyses provide a new impetus for pushing the application of China's high-resolution earth observation system from a "quantity" to "quality" change, from China to the world, from providing products to providing online service.
基金SuppoSed by the National Natural Science Foundation of China under Grant Nos.6067319560703078(国家自然科学基金)+2 种基金the National High-Tech Research and Development Plan of China under Grant No.2007AA04Z113(国家高技术研究发展计划(863))the National Basic Research Program of China under Grant No.2006CB303105(国家重点基础研究发展规划(973))the National Key Technology R&D Program of China under Grant No.2006BAF01A17(国家科技支撑计划)
基金supported by the National Natural Science Foundation of China(Grant Nos.70773015,70431001 and 70620140115)the National Social Sciences Foundation(Grant No.07CTQ008)the Project of DUT(Grant No.DUTHS1002)
文摘The aim of this paper was to identify the trends and hot topics in the study of scientific collaboration via scientometric analysis. Information visualization and knowledge domain visualization techniques were adopted to determine how the study of scientific collaboration has evolved. A total of 1,455 articles on scientific cooperation published between 1993 and 2007 were retrieved from the SCI, SSCI and A&HCI databases with a topic search of scientific collaboration or scientific cooperation for the analysis. By using CiteSpace, the knowledge bases, research foci, and research fronts in the field of scientific collaboration were studied. The results indicated that research fronts and research foci are highly consistent in terms of the concept, origin, measurement, and theory of scientific collaboration. It also revealed that research fronts included scientific collaboration networks, international scientific collaboration, social network analysis and techniques, and applications of bibliometrical indicators, webmetrics, and health care related areas.
文摘针对现有播种机排种技术研究态势缺乏定量分析,热点、重点和难点问题系统性和全面性梳理不充分等问题,该研究对已有排种技术相关文献进行计量学分析,从科研生产力、影响力和发展力等方面可视化呈现排种技术的研究态势,总结排种技术发展脉络和研究热点,并介绍国内外先进农机企业基于前沿排种技术开发的产品,分析其产业化应用情况和未来发展趋势。结果表明:排种技术呈波浪发展,当前处于高速稳态发展期;中国科研产出较多,影响力紧次于美国;代表性期刊有《Biosystems Engineering》《Computers and Electronics in Agriculture》和《农业工程学报》《农业机械学报》等;高影响力学者和机构围绕不同地区的典型农作物开展排种技术研究,推动了排种技术进步和机械化水平提升;排种技术发展脉络以实现功能为主的单一主题研究逐渐过渡到机构优化、机理分析、虚拟仿真等垂直细分主题的深入探索,现阶段排种技术的研究热点主要集中在高速兼用排种、播种均匀性、DEM-CFD耦合仿真、控制和监测系统开发。排种技术应用注重高效高性能装备研发,国内排种新产品研发处于跟跑阶段;随着新兴技术、多学科交叉融合和创新思维的应用,排种技术研究向高速高性能、精准精确、数字化、智能化等方面发展。研究可为把握排种技术领域研究现状、未来发展趋势和播种机具创新提供参考。
