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新冠肺炎疫情影响下区域产业网络风险传导效应研究 被引量:8
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作者 张欣 郁佳亮 irena vodenska 《电子科技大学学报》 EI CAS CSCD 北大核心 2020年第3期415-424,共10页
新冠肺炎疫情的突发和快速蔓延,使我国区域产业经济面临严峻挑战。疫情导致部份产业供给中断和需求下滑,并通过产业链扩散蔓延至整个网络,极易引发系统性风险。为模拟疫情影响下区域产业供应链的风险传导效应,该文通过构建我国区域产业... 新冠肺炎疫情的突发和快速蔓延,使我国区域产业经济面临严峻挑战。疫情导致部份产业供给中断和需求下滑,并通过产业链扩散蔓延至整个网络,极易引发系统性风险。为模拟疫情影响下区域产业供应链的风险传导效应,该文通过构建我国区域产业网络,引入网络级联失效模型,模拟湖北产业供给中断、需求下滑以及不同产业产能受限和需求下降的情况下,停产和流动性风险的传导效应。结果显示,风险的扩散呈现突变态势,存在临界时间点。临界点前风险扩散较为缓慢平稳,一旦突破临界点,则加速蔓延使整个产业网络在短时期内陷入瘫痪。不同产业在供给侧和需求端的冲击影响下,对系统性风险水平的影响具有异质性。 展开更多
关键词 新冠疫情 复杂经济网络 网络级联失效 风险传导
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Classification of Paper Values Based on Citation Rank and PageRank 被引量:2
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作者 Wataru Souma irena vodenska Lou Chitkushev 《Journal of Data and Information Science》 CSCD 2020年第3期57-70,共14页
Purpose: The number of citations has been widely used to measure the significance of a paper. However, there is a need in introducing another index to determine superiority or inferiority of papers with the same numbe... Purpose: The number of citations has been widely used to measure the significance of a paper. However, there is a need in introducing another index to determine superiority or inferiority of papers with the same number of citations. We determine superiority or inferiority of papers by using the ranking based on the number of citations and PageRank.Design/methodology/approach: We show the positive linear correlation between Citation Rank(the ranking of the number of citation) and PageRank. On this basis, we identify highquality, prestige, emerging, and popular papers. Findings: We found that the high-quality papers belong to the subjects of biochemistry and molecular biology, chemistry, and multidisciplinary sciences. The prestige papers correspond to the subjects of computer science, engineering, and information science. The emerging papers are related to biochemistry and molecular biology, as well as those published in the journal "Cell." The popular papers belong to the subject of multidisciplinary sciences. Research limitations: We analyze the Science Citation Index Expanded(SCIE) from 1981 to 2015 to calculate Citation Rank and PageRank within a citation network consisting of 34,666,719 papers and 591,321,826 citations.Practical implications: Our method is applicable to forecast emerging fields of research subjects in science and helps policymakers to consider science policy.Originality/value: We calculated PageRank for a giant citation network which is extremely larger than the citation networks investigated by previous researchers. 展开更多
关键词 Number of citation PAGERANK High-quality papers Prestige papers Emerging papers Popular papers
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美国--公共卫生信息系统的困境与挑战
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作者 张光岚 朱静敏 +1 位作者 LouChitkushev irena vodenska 《中国卫生》 2021年第2期95-96,共2页
信息管理与沟通是“医防融合”不可或缺的环节。回顾美国此次疫情政策与应对过程,由于公共卫生信息系统的老化过时,导致信息沟通与疫情治理面临诸多困境与挑战。疫情应对过程美国公共卫生系统由联邦公共卫生机构和3000多个地方及州公共... 信息管理与沟通是“医防融合”不可或缺的环节。回顾美国此次疫情政策与应对过程,由于公共卫生信息系统的老化过时,导致信息沟通与疫情治理面临诸多困境与挑战。疫情应对过程美国公共卫生系统由联邦公共卫生机构和3000多个地方及州公共卫生部门组成。联邦公共卫生机构包括卫生与公共服务部(HHS)下属的疾病控制与预防中心(CDC)和食品和药物管理局(FDA)。 展开更多
关键词 信息管理 公共卫生机构 信息沟通 公共卫生信息系统 公共卫生系统 公共卫生部门 CDC 控制与预防
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