Objective:Nurse practitioners(NPs)have drawn significant attention recently and played a major role in healthcare.We aim to find the evaluation of NPs through published studies and then visualize the research status a...Objective:Nurse practitioners(NPs)have drawn significant attention recently and played a major role in healthcare.We aim to find the evaluation of NPs through published studies and then visualize the research status and hotspots in this field.Methods:All data came from the Web of Science Core Collection,and the data were counted and entered into Excel 2016.The key documents nodes were excavated by analyzing the knowledge network map using Cite Space V software.In this study,these nodes of“author,country,institution,keyword,co-citation(referencecited-authorcited-journal),and grant”were harvested for analysis and comparison.Results:A total of 4912 records,which were published between 2007 and 2018 and pertained to NPs,were retrieved from the Web of Science Core Collection database(Wo SCC)from a diversity of languages.The total and the annual number of publications and citations of these continually increased over time.Most publications were in 2018(618 records).This study involved 8241 authors located in 98 countries and 4557 institutions totally.The United States(2737 records)and the University of Michigan(90 records)dominated in publication frequency.There are 902 journals and 2449 articles with funding support that have been analyzed.Most articles were from JAMA:The Journal of the American Medical Association(1386,IF=47.661),followed by the Journal of Advanced Nursing(1359,IF=2.267),and The New England Journal of Medicine(1109,IF=79.258).The reference“The Role of Nurse Practitioners in Reinventing Primary Care”was co-cited most frequently,which revealed it as the highest landmark article in NP.The top-ranked keyword was“Care,”other than“Nurse practitioner,”which has an ultra-high frequency.Some of the high-frequency keywords represent the significant direction of NPs.Conclusions:NPs are at the crux of health-care delivery and play an important role in providing high-quality nursing.Publications on NPs in Wo SCC have increased notably during the recent years,and have appeared in some journals that have a high impact factor.Research frontiers and developmental trends were revealed by the analysis in this study,which can be used to forecast future research developments in NPs and taken as a reference to choose the right directions by subsequent researchers who wish to use these results.However,the grant support from administration or research institutions is still in need of improvement and the scope of research in NPs should be broadened in the future.展开更多
城市风险治理是国内外重要研究热点。本文以Web of Science数据库中1979-2018年在SSCI收录期刊上发表的761篇中国城市风险研究文献为分析样本。综合运用文献计量法、内容分析法、Citespace V可视化分析方法,对文献样本的学术关注度、学...城市风险治理是国内外重要研究热点。本文以Web of Science数据库中1979-2018年在SSCI收录期刊上发表的761篇中国城市风险研究文献为分析样本。综合运用文献计量法、内容分析法、Citespace V可视化分析方法,对文献样本的学术关注度、学科分布情况、论文发表期刊分布情况和作者所属国家(地区)、机构分布情况进行分析,重点研究中国城市风险治理研究热点分布和研究不足。研究发现,改革开放40年来,越来越多的中国城市风险治理相关研究文献发表在国外期刊上,学术关注度稳步上升;刊文的学术期刊主要集中在公共环境和职业健康、环境研究、多学科研究、精神病学和经济学等领域,大多为Q3和Q4区期刊;很多文章由多个国家或地区的学者共同完成,国际间研究合作趋势明显;关键词频次最高的是“治理”和“气候变化”,研究热点以城市水资源、气候和生态系统功能,城市设计与规划的风险评估,以及极端降水、洪水和滑坡等传统城市风险领域为主。展开更多
乡村旅游作为乡村经济发展的重要助推剂,对促进乡村产业转型升级和实现乡村振兴具有重要意义。以1997—2017年"Web of Science TM核心合集"的相关论文为面板数据,对国际乡村旅游研究进行科学计量分析,以期把握国际前沿话题,...乡村旅游作为乡村经济发展的重要助推剂,对促进乡村产业转型升级和实现乡村振兴具有重要意义。以1997—2017年"Web of Science TM核心合集"的相关论文为面板数据,对国际乡村旅游研究进行科学计量分析,以期把握国际前沿话题,探讨未来乡村旅游发展趋势。结果表明:①国际乡村旅游的发文数量呈现出阶段性增长趋势,研究主要涉及环境科学、生态学、社会学、地理学等学科,发文作者群体较大。②高被引文献和关键节点文献主要出自该研究领域中的顶级期刊。③乡村旅游发展现状、运营与管理、影响因素、社区变化、生态保护等是乡村旅游研究的核心关键词,未来研究前沿将集中于乡村文化、景观、满意度、可持续发展等方面。展开更多
With the increasing of users and the demands which are transforming from the monotonous traditional service to network service,Multiple space environment web applications including browser-client,rich-client and mobil...With the increasing of users and the demands which are transforming from the monotonous traditional service to network service,Multiple space environment web applications including browser-client,rich-client and mobile-client applications have been developed by SEPC(Space Environment Prediction Center,NSSC,CAS)during the past few years.The architecture of Operational Space Environment Technology System(OSETS) that these applications rely on is described and the description of structural optimization of the architecture is provided.To demonstrate the evolution of the OSETS,three web application examples for e SpaceWx,Space Weather Situation Awareness Picture(SWSAP),Plug-and-Play SWx Analysis and Plotting Program(PPSWAP) are presented.展开更多
An improved decision tree method for web information retrieval with self-mapping attributes is proposed.The self-mapping tree has a value of self-mapping attribute in its internal node,and information based on dissimi...An improved decision tree method for web information retrieval with self-mapping attributes is proposed.The self-mapping tree has a value of self-mapping attribute in its internal node,and information based on dissimilarity between a pair of mapping sequences.This method selects self-mapping which exists between data by exhaustive search based on relation and attribute information.Experimental results confirm that the improved method constructs comprehensive and accurate decision tree.Moreover,an example shows that the self-mapping decision tree is promising for data mining and knowledge discovery.展开更多
城市滨水空间作为城市设计的主要组成部分,对提升居民生活质量、延续城市精神文脉、推动城市经济发展具有重要意义。为探究近年来城市设计过程中国内外滨水空间的研究进展与方向,运用Cite Space文献计量软件,以Web of Science及CNKI核...城市滨水空间作为城市设计的主要组成部分,对提升居民生活质量、延续城市精神文脉、推动城市经济发展具有重要意义。为探究近年来城市设计过程中国内外滨水空间的研究进展与方向,运用Cite Space文献计量软件,以Web of Science及CNKI核心数据库为基础,通过梳理1999年至2023年国内外滨水空间相关文献,对国内外滨水空间研究现状、热点、前沿与主题4个方面进行综合分析,进而从研究内容、视角、方法、机制4个方面对未来国内外滨水空间的相关研究提出建议。研究结果表明,国内外发文量整体呈上升趋势,且均以滨水区的更新改造及生态系统修复为热点议题。此外,国内有关滨水区的相关研究注重对国外滨水区开发经验的总结,而国外则更注重对滨水空间发展效应及管理机制的探讨。展开更多
The multi-granularity spatial-temporal-related access control(MSTAC) model was proposed to meet the spatial access control requirements for the service-oriented spatial data infrastructure(SDI). MSTAC extends the ...The multi-granularity spatial-temporal-related access control(MSTAC) model was proposed to meet the spatial access control requirements for the service-oriented spatial data infrastructure(SDI). MSTAC extends the attribute constraints of role-based access control(RBAC), which includes the user's location attribute, the role's time constraint, the layer vector constraint of a map class, the scale and time constraints of a geographic layer, the topological constraints of geographic features, the semantic attribute expression constraints of geographic features, and the field constraint of feature views. Through this model, authorized users would be limited to access different granularity spatial datasets, such as the map granularity, the graphic layer granularity, the feature object granularity and the feature view granularity. Finally, the MSTAC model is achieved in a web GIS, which shows the positive and negative authorizations to different services in different data granularities and time periods.展开更多
Deep Web自动分类是建立深网数据集成系统的前提和基础。提出了一种基于领域特征文本的Deep Web分类方法。首先借助本体知识对表达同一语义的不同词汇进行了概念抽象,进而给出了领域相关度的定义,并将其作为特征文本选择的量化标准,避...Deep Web自动分类是建立深网数据集成系统的前提和基础。提出了一种基于领域特征文本的Deep Web分类方法。首先借助本体知识对表达同一语义的不同词汇进行了概念抽象,进而给出了领域相关度的定义,并将其作为特征文本选择的量化标准,避免了人为选取的主观性和不确定性;在接口向量模型构建中,考虑了不同特征文本对于分类作用的差异,提出了一种改进的W-TFIDF权重计算方法;最后采用KNN算法对接口向量进行了分类。对比实验证明,利用所提方法选择的特征文本是准确有效的,新的特征文本权重计算方法能显著地提高分类精度,且在KNN算法中表现出较好的稳定性。展开更多
基金supported by Education and teaching reform research project of southwest medical university(No.JG2015082)。
文摘Objective:Nurse practitioners(NPs)have drawn significant attention recently and played a major role in healthcare.We aim to find the evaluation of NPs through published studies and then visualize the research status and hotspots in this field.Methods:All data came from the Web of Science Core Collection,and the data were counted and entered into Excel 2016.The key documents nodes were excavated by analyzing the knowledge network map using Cite Space V software.In this study,these nodes of“author,country,institution,keyword,co-citation(referencecited-authorcited-journal),and grant”were harvested for analysis and comparison.Results:A total of 4912 records,which were published between 2007 and 2018 and pertained to NPs,were retrieved from the Web of Science Core Collection database(Wo SCC)from a diversity of languages.The total and the annual number of publications and citations of these continually increased over time.Most publications were in 2018(618 records).This study involved 8241 authors located in 98 countries and 4557 institutions totally.The United States(2737 records)and the University of Michigan(90 records)dominated in publication frequency.There are 902 journals and 2449 articles with funding support that have been analyzed.Most articles were from JAMA:The Journal of the American Medical Association(1386,IF=47.661),followed by the Journal of Advanced Nursing(1359,IF=2.267),and The New England Journal of Medicine(1109,IF=79.258).The reference“The Role of Nurse Practitioners in Reinventing Primary Care”was co-cited most frequently,which revealed it as the highest landmark article in NP.The top-ranked keyword was“Care,”other than“Nurse practitioner,”which has an ultra-high frequency.Some of the high-frequency keywords represent the significant direction of NPs.Conclusions:NPs are at the crux of health-care delivery and play an important role in providing high-quality nursing.Publications on NPs in Wo SCC have increased notably during the recent years,and have appeared in some journals that have a high impact factor.Research frontiers and developmental trends were revealed by the analysis in this study,which can be used to forecast future research developments in NPs and taken as a reference to choose the right directions by subsequent researchers who wish to use these results.However,the grant support from administration or research institutions is still in need of improvement and the scope of research in NPs should be broadened in the future.
文摘城市风险治理是国内外重要研究热点。本文以Web of Science数据库中1979-2018年在SSCI收录期刊上发表的761篇中国城市风险研究文献为分析样本。综合运用文献计量法、内容分析法、Citespace V可视化分析方法,对文献样本的学术关注度、学科分布情况、论文发表期刊分布情况和作者所属国家(地区)、机构分布情况进行分析,重点研究中国城市风险治理研究热点分布和研究不足。研究发现,改革开放40年来,越来越多的中国城市风险治理相关研究文献发表在国外期刊上,学术关注度稳步上升;刊文的学术期刊主要集中在公共环境和职业健康、环境研究、多学科研究、精神病学和经济学等领域,大多为Q3和Q4区期刊;很多文章由多个国家或地区的学者共同完成,国际间研究合作趋势明显;关键词频次最高的是“治理”和“气候变化”,研究热点以城市水资源、气候和生态系统功能,城市设计与规划的风险评估,以及极端降水、洪水和滑坡等传统城市风险领域为主。
文摘乡村旅游作为乡村经济发展的重要助推剂,对促进乡村产业转型升级和实现乡村振兴具有重要意义。以1997—2017年"Web of Science TM核心合集"的相关论文为面板数据,对国际乡村旅游研究进行科学计量分析,以期把握国际前沿话题,探讨未来乡村旅游发展趋势。结果表明:①国际乡村旅游的发文数量呈现出阶段性增长趋势,研究主要涉及环境科学、生态学、社会学、地理学等学科,发文作者群体较大。②高被引文献和关键节点文献主要出自该研究领域中的顶级期刊。③乡村旅游发展现状、运营与管理、影响因素、社区变化、生态保护等是乡村旅游研究的核心关键词,未来研究前沿将集中于乡村文化、景观、满意度、可持续发展等方面。
文摘With the increasing of users and the demands which are transforming from the monotonous traditional service to network service,Multiple space environment web applications including browser-client,rich-client and mobile-client applications have been developed by SEPC(Space Environment Prediction Center,NSSC,CAS)during the past few years.The architecture of Operational Space Environment Technology System(OSETS) that these applications rely on is described and the description of structural optimization of the architecture is provided.To demonstrate the evolution of the OSETS,three web application examples for e SpaceWx,Space Weather Situation Awareness Picture(SWSAP),Plug-and-Play SWx Analysis and Plotting Program(PPSWAP) are presented.
文摘An improved decision tree method for web information retrieval with self-mapping attributes is proposed.The self-mapping tree has a value of self-mapping attribute in its internal node,and information based on dissimilarity between a pair of mapping sequences.This method selects self-mapping which exists between data by exhaustive search based on relation and attribute information.Experimental results confirm that the improved method constructs comprehensive and accurate decision tree.Moreover,an example shows that the self-mapping decision tree is promising for data mining and knowledge discovery.
文摘城市滨水空间作为城市设计的主要组成部分,对提升居民生活质量、延续城市精神文脉、推动城市经济发展具有重要意义。为探究近年来城市设计过程中国内外滨水空间的研究进展与方向,运用Cite Space文献计量软件,以Web of Science及CNKI核心数据库为基础,通过梳理1999年至2023年国内外滨水空间相关文献,对国内外滨水空间研究现状、热点、前沿与主题4个方面进行综合分析,进而从研究内容、视角、方法、机制4个方面对未来国内外滨水空间的相关研究提出建议。研究结果表明,国内外发文量整体呈上升趋势,且均以滨水区的更新改造及生态系统修复为热点议题。此外,国内有关滨水区的相关研究注重对国外滨水区开发经验的总结,而国外则更注重对滨水空间发展效应及管理机制的探讨。
基金Projects(41074010,41171343)supported by the National Natural Science Foundation of ChinaProject(BK20140185)supported by Jiangsu Province Natural Science Foundation for Youths,China+1 种基金Project(51204185)supported by National Youth Science Foundation of ChinaProject(2014QNA44)supported by Youth Science Fund of China University of Mining and Technology
文摘The multi-granularity spatial-temporal-related access control(MSTAC) model was proposed to meet the spatial access control requirements for the service-oriented spatial data infrastructure(SDI). MSTAC extends the attribute constraints of role-based access control(RBAC), which includes the user's location attribute, the role's time constraint, the layer vector constraint of a map class, the scale and time constraints of a geographic layer, the topological constraints of geographic features, the semantic attribute expression constraints of geographic features, and the field constraint of feature views. Through this model, authorized users would be limited to access different granularity spatial datasets, such as the map granularity, the graphic layer granularity, the feature object granularity and the feature view granularity. Finally, the MSTAC model is achieved in a web GIS, which shows the positive and negative authorizations to different services in different data granularities and time periods.