目的运用Cite Space可视化软件,分析目前国内外老年护理需求评估研究热点和研究前沿。方法以“老年护理AND需求评估”为关键词,选取中国知网(CNKI)和Web of Science(WOS)核心合集数据库分别进行中英文文献检索,检索时间为2016年1月1日至...目的运用Cite Space可视化软件,分析目前国内外老年护理需求评估研究热点和研究前沿。方法以“老年护理AND需求评估”为关键词,选取中国知网(CNKI)和Web of Science(WOS)核心合集数据库分别进行中英文文献检索,检索时间为2016年1月1日至2021年12月31。采用Cite Space软件对2个数据库的检索结果进行高频关键词分析、关键词突现分析和关键词聚类。结果从CNKI数据库中纳入文献240篇,获得关键词304个,突现关键词包括老年护理、需求评估、失能老年人及养老服务等;从WOS数据库中纳入文献406篇,获得关键词136个,突现关键词包括long term care、cognitive impairment、cancer、quality及tool等。近5年的研究热点为老年护理需求评估的方法及评估工具、失能老年人与老年护理需求评估。结论国内外对于老年护理需求评估研究存在一定的差距,未来国内可借鉴国外高质量文献,引导我国老年护理需求评估的研究方向及具体内容。展开更多
We are interested in the convergence rates of the submartingale Wn=Z_(n)/Π_(n)to its limit W,where(Π_(n))is the usually used norming sequence and(Z_(n))is a supercritical branching process with immigration(Y_(n))in ...We are interested in the convergence rates of the submartingale Wn=Z_(n)/Π_(n)to its limit W,where(Π_(n))is the usually used norming sequence and(Z_(n))is a supercritical branching process with immigration(Y_(n))in a stationary and ergodic environmentξ.Under suitable conditions,we establish the following central limit theorems and results about the rates of convergence in probability or in law:(i)W-W_(n) with suitable normalization converges to the normal law N(0,1),and similar results also hold for W_(n+k)-W_(n) for each fixed k∈N^(*);(ii)for a branching process with immigration in a finite state random environment,if W_(1) has a finite exponential moment,then so does W,and the decay rate of P(|W-W_(n)|>ε)is supergeometric;(iii)there are normalizing constants an(ξ)(that we calculate explicitly)such that a_(n)(ξ)(W-W_(n))converges in law to a mixture of the Gaussian law.展开更多
文摘目的运用Cite Space可视化软件,分析目前国内外老年护理需求评估研究热点和研究前沿。方法以“老年护理AND需求评估”为关键词,选取中国知网(CNKI)和Web of Science(WOS)核心合集数据库分别进行中英文文献检索,检索时间为2016年1月1日至2021年12月31。采用Cite Space软件对2个数据库的检索结果进行高频关键词分析、关键词突现分析和关键词聚类。结果从CNKI数据库中纳入文献240篇,获得关键词304个,突现关键词包括老年护理、需求评估、失能老年人及养老服务等;从WOS数据库中纳入文献406篇,获得关键词136个,突现关键词包括long term care、cognitive impairment、cancer、quality及tool等。近5年的研究热点为老年护理需求评估的方法及评估工具、失能老年人与老年护理需求评估。结论国内外对于老年护理需求评估研究存在一定的差距,未来国内可借鉴国外高质量文献,引导我国老年护理需求评估的研究方向及具体内容。
基金supported by the National Natural Science Foundation of China(11571052,11731012)the Hunan Provincial Natural Science Foundation of China(2018JJ2417)the Open Fund of Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering(2018MMAEZD02)。
文摘We are interested in the convergence rates of the submartingale Wn=Z_(n)/Π_(n)to its limit W,where(Π_(n))is the usually used norming sequence and(Z_(n))is a supercritical branching process with immigration(Y_(n))in a stationary and ergodic environmentξ.Under suitable conditions,we establish the following central limit theorems and results about the rates of convergence in probability or in law:(i)W-W_(n) with suitable normalization converges to the normal law N(0,1),and similar results also hold for W_(n+k)-W_(n) for each fixed k∈N^(*);(ii)for a branching process with immigration in a finite state random environment,if W_(1) has a finite exponential moment,then so does W,and the decay rate of P(|W-W_(n)|>ε)is supergeometric;(iii)there are normalizing constants an(ξ)(that we calculate explicitly)such that a_(n)(ξ)(W-W_(n))converges in law to a mixture of the Gaussian law.
