The diversity of e-commerce Business to Consumer systems and the significant increase in their use during the COVID-19 pandemic as a one of the primary channels of retail commerce, has made all the most important the ...The diversity of e-commerce Business to Consumer systems and the significant increase in their use during the COVID-19 pandemic as a one of the primary channels of retail commerce, has made all the most important the need to measuring their quality using practical methods. This paper presents a quality evaluation framework for web metrics that are B2C specific. The framework uses three dimensions based on end-user interaction categories, metrics internal specs and quality sub-characteristics as defined by ISO25010. Beginning from the existing large corpus of general-purpose web metrics, e-commerce specific metrics are chosen and categorized. Analysis results are subjected to a data mining analysis to provide association rules between the various dimensions of the framework. Finally, an ontology that corresponds to the framework is developed to answer to complicated questions related to metrics use and to facilitate the production of new, user defined meta-metrics.展开更多
为揭示农业生态安全领域研究的历史动态,为我国农业生态安全研究理论和实践提供借鉴,以Web of Science为数据源、以CiteSpace为工具,对农业生态安全研究在2008—2018年的知识发展图谱进行分析。结果表明,农业生态安全研究大致划分为3个...为揭示农业生态安全领域研究的历史动态,为我国农业生态安全研究理论和实践提供借鉴,以Web of Science为数据源、以CiteSpace为工具,对农业生态安全研究在2008—2018年的知识发展图谱进行分析。结果表明,农业生态安全研究大致划分为3个阶段:基础阶段(2008—2011年)、快速增长阶段(2012—2014年)、新的快速增长阶段(2015—2018年),不同阶段有不同的研究重点,总体来说,农业生态安全研究以粮食安全为中心,向评价(Evaluation)、空间格局(Spatial pattern)、生态危险评价(Ecological risk assessment)等方面拓展;TILMAN D、GODFRAY H C J、FOLEY J A、ALTIERI M A、LOBELL D B、FOLKE C、PRETTY J为农业生态安全研究领域领军人物,在该领域具有较大的贡献;Sustainability、Food Security、Land Use Policy、PloS One等为农业生态安全领域主要的论文产出期刊;中国科学院在农业生态安全研究领域中占据有绝对的中心性;中国国家自然科学基金会支持的论文占农业生态安全研究领域检出论文总数的12.9%,居第1位。综上,我国的农业生态安全研究可以借鉴国际上的发展趋势,积极引入现代农业、数学模型等新技术、新理念,将农业生态安全研究更加细化和精尖化;对领军人物进行重点追踪,把握最新研究前沿,布局未来新兴热点;进一步扩大对外合作,以巩固和加强我国目前在该领域的学术地位。展开更多
文摘The diversity of e-commerce Business to Consumer systems and the significant increase in their use during the COVID-19 pandemic as a one of the primary channels of retail commerce, has made all the most important the need to measuring their quality using practical methods. This paper presents a quality evaluation framework for web metrics that are B2C specific. The framework uses three dimensions based on end-user interaction categories, metrics internal specs and quality sub-characteristics as defined by ISO25010. Beginning from the existing large corpus of general-purpose web metrics, e-commerce specific metrics are chosen and categorized. Analysis results are subjected to a data mining analysis to provide association rules between the various dimensions of the framework. Finally, an ontology that corresponds to the framework is developed to answer to complicated questions related to metrics use and to facilitate the production of new, user defined meta-metrics.
文摘为揭示农业生态安全领域研究的历史动态,为我国农业生态安全研究理论和实践提供借鉴,以Web of Science为数据源、以CiteSpace为工具,对农业生态安全研究在2008—2018年的知识发展图谱进行分析。结果表明,农业生态安全研究大致划分为3个阶段:基础阶段(2008—2011年)、快速增长阶段(2012—2014年)、新的快速增长阶段(2015—2018年),不同阶段有不同的研究重点,总体来说,农业生态安全研究以粮食安全为中心,向评价(Evaluation)、空间格局(Spatial pattern)、生态危险评价(Ecological risk assessment)等方面拓展;TILMAN D、GODFRAY H C J、FOLEY J A、ALTIERI M A、LOBELL D B、FOLKE C、PRETTY J为农业生态安全研究领域领军人物,在该领域具有较大的贡献;Sustainability、Food Security、Land Use Policy、PloS One等为农业生态安全领域主要的论文产出期刊;中国科学院在农业生态安全研究领域中占据有绝对的中心性;中国国家自然科学基金会支持的论文占农业生态安全研究领域检出论文总数的12.9%,居第1位。综上,我国的农业生态安全研究可以借鉴国际上的发展趋势,积极引入现代农业、数学模型等新技术、新理念,将农业生态安全研究更加细化和精尖化;对领军人物进行重点追踪,把握最新研究前沿,布局未来新兴热点;进一步扩大对外合作,以巩固和加强我国目前在该领域的学术地位。
