After the Winter Olympics,Beijing proposed to speed up the construction of rail transit.Taking Beijing as the research object,the accessibility of rail transit stations in the 6 districts of the city were analyzed by ...After the Winter Olympics,Beijing proposed to speed up the construction of rail transit.Taking Beijing as the research object,the accessibility of rail transit stations in the 6 districts of the city were analyzed by using POI services and route planning services provided by Internet map providers,relying on ArcMap10.6 platform.The research holds that the development of rail transit in Beijing is not sufficient and unbalanced.Network density has an important influence on the accessibility of rail transit stations.The travel mode of rail transit + cycling can improve the accessibility of stations in underdeveloped areas.In Shijingshan District,the accessibility of rail transit stations in the region can be improved by optimizing the slow traveling environment between the Winter Olympics branch line,Subway Line 6 and Subway Line 1.展开更多
Selecting plants adapted to the climatic and soil conditions of specific locations is essential for environmental protection and economic sustainability of agricultural and pastoral systems. This is particularly true ...Selecting plants adapted to the climatic and soil conditions of specific locations is essential for environmental protection and economic sustainability of agricultural and pastoral systems. This is particularly true for countries like China with a diversity of climates and soils and intended uses. Currently, proper species selection is difficult due to the absence of computer-based selection tools. Climate and soil GIS layers, matched with a matrix of plant characteristics through rules describing species tolerances would greatly improve the selection process. Better matching will reduce environmental hazards and economic risks associated with sub-optimal plant selection and performance. GIS-based climate and soil maps have been developed for China. A matrix of quantitative species tolerances has been developed for example forage species and used in combination with an internet map server that allows customized map creation. A web-based decision support system has been developed to provide current information and links to original data sources, supplementary materials, and selection strategies.展开更多
物联网实现物与物、人与物的互联,具有十分广阔的市场和应用前景。运用信息计量学、自研软件和以Citespace为代表的知识图谱工具相结合的方法对1987至2014年英文"Internet of Things"SCI文献的基本情况和研究热点与趋势进行...物联网实现物与物、人与物的互联,具有十分广阔的市场和应用前景。运用信息计量学、自研软件和以Citespace为代表的知识图谱工具相结合的方法对1987至2014年英文"Internet of Things"SCI文献的基本情况和研究热点与趋势进行了初步分析与可视化展现。通过对数据的处理和分析得出了英文"Internet of Things"SCI文献的期刊、国家、机构、学科、作者、高被引用文献等基本情况,并利用关键词共现、突现词检测等方法对英文"Internet of Things"研究的热点和未来的研究趋势进行了初步预测。研究表明,运用知识图谱工具分析物联网研究点与趋势,是一种有意义的手段。展开更多
基金Beijing Urban Governance Research Base Project of North China University of Technology (21CSZL11)General Project of Beijing Natural Science Foundation (8212009)+1 种基金2019 Youth Top Talents Training Plan of High-level Teacher Team Construction Support Program of Colleges and Universities in Beijing (CIT&TCD201904010)Construction of Philosophy and Community Base in Beijing “A Study on Urban Renewal and Environmental Comprehensive Treatment of Old Communities in Beijing”。
文摘After the Winter Olympics,Beijing proposed to speed up the construction of rail transit.Taking Beijing as the research object,the accessibility of rail transit stations in the 6 districts of the city were analyzed by using POI services and route planning services provided by Internet map providers,relying on ArcMap10.6 platform.The research holds that the development of rail transit in Beijing is not sufficient and unbalanced.Network density has an important influence on the accessibility of rail transit stations.The travel mode of rail transit + cycling can improve the accessibility of stations in underdeveloped areas.In Shijingshan District,the accessibility of rail transit stations in the region can be improved by optimizing the slow traveling environment between the Winter Olympics branch line,Subway Line 6 and Subway Line 1.
文摘Selecting plants adapted to the climatic and soil conditions of specific locations is essential for environmental protection and economic sustainability of agricultural and pastoral systems. This is particularly true for countries like China with a diversity of climates and soils and intended uses. Currently, proper species selection is difficult due to the absence of computer-based selection tools. Climate and soil GIS layers, matched with a matrix of plant characteristics through rules describing species tolerances would greatly improve the selection process. Better matching will reduce environmental hazards and economic risks associated with sub-optimal plant selection and performance. GIS-based climate and soil maps have been developed for China. A matrix of quantitative species tolerances has been developed for example forage species and used in combination with an internet map server that allows customized map creation. A web-based decision support system has been developed to provide current information and links to original data sources, supplementary materials, and selection strategies.
文摘物联网实现物与物、人与物的互联,具有十分广阔的市场和应用前景。运用信息计量学、自研软件和以Citespace为代表的知识图谱工具相结合的方法对1987至2014年英文"Internet of Things"SCI文献的基本情况和研究热点与趋势进行了初步分析与可视化展现。通过对数据的处理和分析得出了英文"Internet of Things"SCI文献的期刊、国家、机构、学科、作者、高被引用文献等基本情况,并利用关键词共现、突现词检测等方法对英文"Internet of Things"研究的热点和未来的研究趋势进行了初步预测。研究表明,运用知识图谱工具分析物联网研究点与趋势,是一种有意义的手段。
