为系统梳理国内外农村基础设施建设的研究进展与热点前沿,以2000—2022年中国知网(CNKI)与Web of Science核心合集数据库中收录的4609篇文献为数据样本,运用可视化分析软件CiteSpace和文献计量研究法,对国内外农村基础设建设的研究现状...为系统梳理国内外农村基础设施建设的研究进展与热点前沿,以2000—2022年中国知网(CNKI)与Web of Science核心合集数据库中收录的4609篇文献为数据样本,运用可视化分析软件CiteSpace和文献计量研究法,对国内外农村基础设建设的研究现状、关键词聚类与突现关键词进行分析。结果表明,国内外发文整体呈增长趋势,国外研究热度整体高于国内;国内研究更关注经济、财政等学科领域,国外研究涉及环境、科学、生态等学科领域;国内外学者之间的合作均较少,相较于国外研究机构,国内机构彼此之间项目交流与研究合作更少;国外研究关键词主要聚焦于绿色基础设施、农村卫生、农村电气化以及可持续生计等方面,国内研究关键词主要包括乡村振兴、农田水利、农村经济等;现阶段,国外研究主要集中在可再生能源与可持续发展,国内重点关注乡村振兴与农村电商等内容。最后,探讨了中国农村基础设施建设领域未来的研究展望,在后续研究中可以关注可持续性农村基础设施建设、绿色基础设施建设以及农村信息基础设施建设等领域。展开更多
The aim of this research is to explore the role of Knowledge Management (KM) infrastructure (organizational culture, organizational structure and information technology) in enhancing job satisfaction at Aqaba five sta...The aim of this research is to explore the role of Knowledge Management (KM) infrastructure (organizational culture, organizational structure and information technology) in enhancing job satisfaction at Aqaba five star hotels located in Jordan. A total of 216 questionnaires containing 33 items were used to collect information from the respondents. Multiple regression analysis was conducted to test the research hypotheses. Results of the current study revealed that there is a significant positive impact of KM infrastructure on job satisfaction and these results are in line with the results of the previous studies mentioned in the literature, and also revealed that the dimensions of KM infrastructure that has the highest effect on job satisfaction are organizational culture followed by information technology;whereas the variable of organizational structure has not significant impact on it. Results of T-test showed that there is no significant difference in the impact of KM infrastructure towards job satisfaction in favor of gender. In addition, results of ANOVA test found that there are significant differences in the impact of KM infrastructure on job satisfaction that can be attributed to age, educational level, and personal income.展开更多
In order to find the roles of knowledge-intensive business services （KIBS） in the innovation activities, This paper focus on three perspectives. First, we find that KIBS possess good prerequisites to function as veh...In order to find the roles of knowledge-intensive business services （KIBS） in the innovation activities, This paper focus on three perspectives. First, we find that KIBS possess good prerequisites to function as vehicles in innovation distribution, the sources of innovation and the facilitators of innovation in their client firms. Second, we further discuss KIBS as the knowledge and innovation infrastructure of society in parallel with the research, educational and other public institutions. Third, we present some research policies and agenda to promote the development of KIBS. It is regarded that much remains to be studied both in the use of KIBS and in their own activities, including integrating and networking the knowledge-intensive services into the client companies, the convergence of various services and closer connection with the client companies＇ strategy, and the national policies to connect the KIBS to the different sectors.展开更多
为更深层次了解森林小气候领域的发展规律与前沿热点,运用CiteSpace文献计量软件从文献基本特征(发文量、学科、期刊、作者、机构、国家)、学术版图、研究热点与前沿等角度对中国知网与Web of Science两个数据库中2000—2021年森林小气...为更深层次了解森林小气候领域的发展规律与前沿热点,运用CiteSpace文献计量软件从文献基本特征(发文量、学科、期刊、作者、机构、国家)、学术版图、研究热点与前沿等角度对中国知网与Web of Science两个数据库中2000—2021年森林小气候领域的2778篇中英文文献进行可视化分析.结果表明:①近20 a来,国内外学者在森林小气候领域主要围绕研究对象(如冷杉林、次生林等)、研究指标(如树冠蒸腾、土壤呼吸等)、研究理论(如边缘效应、小气候效应)、研究方法(如逐步回归、旷场实验等)、气象因子(如太阳辐射、空气温湿度等)与生物因子(如树冠形态等)等6块学术版图进行研究;②第1阶段(2000—2009年)是森林小气候领域的快速发展与繁盛阶段,重点围绕森林对气象因子的改善作用等基础研究展开,第2阶段(2010—2021年)是对该领域的补充发展阶段,重点围绕森林与人的关系等应用研究展开,并与城市发展、人体健康等话题相结合;③该领域文献半衰期短(0.77—2.31 a),老化速度快,发展迅速.我国在该领域的发展处于上升阶段,发文量不少,但同时存在文献影响力较低等问题.未来几年的发展趋势仍会围绕城市的发展以及与人的关系进行展开,森林康养、人体舒适度的提高、生态系统服务、森林小气候特征对“碳源”“碳汇”的影响机制以及高山林线的气候变化等研究方向可能成为热点主题.展开更多
为分析交通基础设施研究的热点与趋势,文章利用Citespace可视化软件,以2000-2021年Web of Science的SCI-E和SSCI数据库收录的交通基础设施领域文献为研究对象,进行文献外部特征及知识图谱分析。结果表明:目前研究主要聚焦于交通基础设...为分析交通基础设施研究的热点与趋势,文章利用Citespace可视化软件,以2000-2021年Web of Science的SCI-E和SSCI数据库收录的交通基础设施领域文献为研究对象,进行文献外部特征及知识图谱分析。结果表明:目前研究主要聚焦于交通基础设施、交通基础设施的投资及可达性对经济增长的直接、间接影响,但研究主题具有由宏观到微观的特点;研究方向逐渐转为考虑二氧化碳排放和能源消耗的经济可持续发展。展开更多
In the big data environment, the construction of massive S&T literature data resources needs intelligent technical assistance. With a focus on comparing the domestic and foreign knowledge organization systems and ...In the big data environment, the construction of massive S&T literature data resources needs intelligent technical assistance. With a focus on comparing the domestic and foreign knowledge organization systems and their applications, this article analyzes and summarizes the gaps in related researches and applications at home and abroad. A knowledge organization system framework for S&T literature data resources is presented in the article. Starting from the basic element of knowledge organization system, it also proposes and designs terminology-based analysis methods and technologies for S&T literature. Based on this framework, it proposes ideas and develops corresponding software tool to carry out relevant experiments. It gives an overview of theories and technologies method for future research.展开更多
<div style="text-align:justify;"> <span style="font-family:Verdana;">In order to understand the current status and future trends of China’s science and technology evaluation research, ...<div style="text-align:justify;"> <span style="font-family:Verdana;">In order to understand the current status and future trends of China’s science and technology evaluation research, we use the visual analysis tool CiteSpace to use the source journals included in the Chinese social science citations from 1998-2019 as the data source, and evaluate the domestic science and technology evaluation papers from the number of publications, the co-occurrence of authors, Institutional co-occurrence and subject clustering are analyzed. The study found that: the total amount of literature in the field of domestic science and technology evaluation is showing an overall upward trend;a relatively obvious author cooperation network has been formed, but the core author group has not yet been formed;institutional cooperation clusters have appeared, but the cooperation between institutions is still relatively scattered;The research topics focus on three aspects: science and technology evaluation index system, evaluation method and evaluation system.</span> </div>展开更多
It is becoming an important social problem to make maintenance and rehabilitation of existing infrastructures such as bridges, buildings, etc. in the world. The kernel of such structure management is to develop a meth...It is becoming an important social problem to make maintenance and rehabilitation of existing infrastructures such as bridges, buildings, etc. in the world. The kernel of such structure management is to develop a method of safety assessment on items<span style="font-family:;" "=""> </span><span style="font-family:;" "="">which include remaining life and load carrying capacity. The purpose of this paper is to summarize the finding of up-to-date research articles concerning the application of knowledge-based systems to assessment and management of structures and to illustrate the potential of such systems in the structural engineering. In here, knowledge-based systems include knowledge-based expert systems incorporation with artificial neural networks, fuzzy reasoning and genetic or immune algorithms.</span><span style="font-family:;" "=""> </span><span style="font-family:;" "="">Specifically, two modern bridge management systems (BMS’s) are presented in the paper. The first is a BMS to assess the performance and derive optimal strategies for inspection and maintenance of concrete bridge structures using reliability based and knowledge-based systems. The second is the concrete bridge rating expert system (<i>J-BMS BREX</i>) to evaluate the performance of existing bridges by incorporating with artificial neural networks and fuzzy reasoning.</span>展开更多
Background Anxiety symptoms are common in mental diseases and a variety of physical disorders, especially in disorders related to stress. More and more basic studies have indicated that gut microbiota can regulate bra...Background Anxiety symptoms are common in mental diseases and a variety of physical disorders, especially in disorders related to stress. More and more basic studies have indicated that gut microbiota can regulate brain function through the gut-brain axis, and dysbiosis of intestinal microbiota was related to anxiety. However, there is no specific evidence to support treatment of anxiety by regulating intestinal microbiota. Aims To find evidence sup porting improvement of anxiety symptoms by regulation of intestinal microbiota. Methods This systematic review of randomised controlled trials was searched based on the following databases: PubMed, EMBASE, the Cochrane Library, OVID, Web of Knowledge, China National Knowledge Infrastructure (CNKI), Wanfang Data, VIP databases and SinoMed. The retrieval time dated back to 25 July 2018. Then we screened research literatures based on established inclusion and exclusion criteria. Quality evaluation for each included study was done using the Cochrane risk of bias and the Jadad scale. Results A total of 3334 articles were retrieved and 21 studies were included which contained 1503 subjects. In the 21 studies, 15 chose probiotics as interventions to regulate intestinal microbiota and six chose non-probiotic ways such as adjusting daily diets. Probiotic supplements in seven studies contained only one kind of probiotic, two studies used a product that contained two kinds of probiotics and the supplements used in the other five studies included at least three kinds of probiotics. In the studies that used treatment as usual plus interventions regulating intestinal flora (IRIF) as interventions (five studies), only non-probiotic ways were effective (two studies), which means 40% of studies were effective;in the studies that used IRIF alone (16 studies, 11 studies used probiotic ways and 5 studies used non-probiotic ways), 56% of studies could improve anxiety symptoms, and 80% of studies that conducted the non-probiotic interventions were effective, while 45% of studies that used probiotic supplementations had positive effects on anxiety symptoms. Overall, 11 studies showed a positive effect on anxiety symptoms by regulating intestinal microbiota, which indicated 52% of the 21 studies were effective, and there were five studies that used probiotic supplements as interventions and six used non-probiotic interventions. In addition, it should be noted that six of seven studies showed that regulation of intestinal microbiota could treat anxiety symptoms, the rate of efficacy was 86%.Conclusions We find that more than half of the studies included showed it was positive to treat anxiety symptoms by regulation of intestinal microbiota. There are two kinds of interventions (probiotic and non-probiotic interventions) to regulate intestinal microbiota, and it should be highlighted that the non-probiotic interventions were more effective than the probiotic interventions. More studies are needed to clarify this conclusion since we still cannot run meta-analysis so far.展开更多
文摘为系统梳理国内外农村基础设施建设的研究进展与热点前沿,以2000—2022年中国知网(CNKI)与Web of Science核心合集数据库中收录的4609篇文献为数据样本,运用可视化分析软件CiteSpace和文献计量研究法,对国内外农村基础设建设的研究现状、关键词聚类与突现关键词进行分析。结果表明,国内外发文整体呈增长趋势,国外研究热度整体高于国内;国内研究更关注经济、财政等学科领域,国外研究涉及环境、科学、生态等学科领域;国内外学者之间的合作均较少,相较于国外研究机构,国内机构彼此之间项目交流与研究合作更少;国外研究关键词主要聚焦于绿色基础设施、农村卫生、农村电气化以及可持续生计等方面,国内研究关键词主要包括乡村振兴、农田水利、农村经济等;现阶段,国外研究主要集中在可再生能源与可持续发展,国内重点关注乡村振兴与农村电商等内容。最后,探讨了中国农村基础设施建设领域未来的研究展望,在后续研究中可以关注可持续性农村基础设施建设、绿色基础设施建设以及农村信息基础设施建设等领域。
文摘The aim of this research is to explore the role of Knowledge Management (KM) infrastructure (organizational culture, organizational structure and information technology) in enhancing job satisfaction at Aqaba five star hotels located in Jordan. A total of 216 questionnaires containing 33 items were used to collect information from the respondents. Multiple regression analysis was conducted to test the research hypotheses. Results of the current study revealed that there is a significant positive impact of KM infrastructure on job satisfaction and these results are in line with the results of the previous studies mentioned in the literature, and also revealed that the dimensions of KM infrastructure that has the highest effect on job satisfaction are organizational culture followed by information technology;whereas the variable of organizational structure has not significant impact on it. Results of T-test showed that there is no significant difference in the impact of KM infrastructure towards job satisfaction in favor of gender. In addition, results of ANOVA test found that there are significant differences in the impact of KM infrastructure on job satisfaction that can be attributed to age, educational level, and personal income.
文摘In order to find the roles of knowledge-intensive business services （KIBS） in the innovation activities, This paper focus on three perspectives. First, we find that KIBS possess good prerequisites to function as vehicles in innovation distribution, the sources of innovation and the facilitators of innovation in their client firms. Second, we further discuss KIBS as the knowledge and innovation infrastructure of society in parallel with the research, educational and other public institutions. Third, we present some research policies and agenda to promote the development of KIBS. It is regarded that much remains to be studied both in the use of KIBS and in their own activities, including integrating and networking the knowledge-intensive services into the client companies, the convergence of various services and closer connection with the client companies＇ strategy, and the national policies to connect the KIBS to the different sectors.
文摘为更深层次了解森林小气候领域的发展规律与前沿热点,运用CiteSpace文献计量软件从文献基本特征(发文量、学科、期刊、作者、机构、国家)、学术版图、研究热点与前沿等角度对中国知网与Web of Science两个数据库中2000—2021年森林小气候领域的2778篇中英文文献进行可视化分析.结果表明:①近20 a来,国内外学者在森林小气候领域主要围绕研究对象(如冷杉林、次生林等)、研究指标(如树冠蒸腾、土壤呼吸等)、研究理论(如边缘效应、小气候效应)、研究方法(如逐步回归、旷场实验等)、气象因子(如太阳辐射、空气温湿度等)与生物因子(如树冠形态等)等6块学术版图进行研究;②第1阶段(2000—2009年)是森林小气候领域的快速发展与繁盛阶段,重点围绕森林对气象因子的改善作用等基础研究展开,第2阶段(2010—2021年)是对该领域的补充发展阶段,重点围绕森林与人的关系等应用研究展开,并与城市发展、人体健康等话题相结合;③该领域文献半衰期短(0.77—2.31 a),老化速度快,发展迅速.我国在该领域的发展处于上升阶段,发文量不少,但同时存在文献影响力较低等问题.未来几年的发展趋势仍会围绕城市的发展以及与人的关系进行展开,森林康养、人体舒适度的提高、生态系统服务、森林小气候特征对“碳源”“碳汇”的影响机制以及高山林线的气候变化等研究方向可能成为热点主题.
文摘为分析交通基础设施研究的热点与趋势,文章利用Citespace可视化软件,以2000-2021年Web of Science的SCI-E和SSCI数据库收录的交通基础设施领域文献为研究对象,进行文献外部特征及知识图谱分析。结果表明:目前研究主要聚焦于交通基础设施、交通基础设施的投资及可达性对经济增长的直接、间接影响,但研究主题具有由宏观到微观的特点;研究方向逐渐转为考虑二氧化碳排放和能源消耗的经济可持续发展。
基金Supported by the National Social Science Fund of China(No.18BTQ054)
文摘In the big data environment, the construction of massive S&T literature data resources needs intelligent technical assistance. With a focus on comparing the domestic and foreign knowledge organization systems and their applications, this article analyzes and summarizes the gaps in related researches and applications at home and abroad. A knowledge organization system framework for S&T literature data resources is presented in the article. Starting from the basic element of knowledge organization system, it also proposes and designs terminology-based analysis methods and technologies for S&T literature. Based on this framework, it proposes ideas and develops corresponding software tool to carry out relevant experiments. It gives an overview of theories and technologies method for future research.
文摘<div style="text-align:justify;"> <span style="font-family:Verdana;">In order to understand the current status and future trends of China’s science and technology evaluation research, we use the visual analysis tool CiteSpace to use the source journals included in the Chinese social science citations from 1998-2019 as the data source, and evaluate the domestic science and technology evaluation papers from the number of publications, the co-occurrence of authors, Institutional co-occurrence and subject clustering are analyzed. The study found that: the total amount of literature in the field of domestic science and technology evaluation is showing an overall upward trend;a relatively obvious author cooperation network has been formed, but the core author group has not yet been formed;institutional cooperation clusters have appeared, but the cooperation between institutions is still relatively scattered;The research topics focus on three aspects: science and technology evaluation index system, evaluation method and evaluation system.</span> </div>
文摘It is becoming an important social problem to make maintenance and rehabilitation of existing infrastructures such as bridges, buildings, etc. in the world. The kernel of such structure management is to develop a method of safety assessment on items<span style="font-family:;" "=""> </span><span style="font-family:;" "="">which include remaining life and load carrying capacity. The purpose of this paper is to summarize the finding of up-to-date research articles concerning the application of knowledge-based systems to assessment and management of structures and to illustrate the potential of such systems in the structural engineering. In here, knowledge-based systems include knowledge-based expert systems incorporation with artificial neural networks, fuzzy reasoning and genetic or immune algorithms.</span><span style="font-family:;" "=""> </span><span style="font-family:;" "="">Specifically, two modern bridge management systems (BMS’s) are presented in the paper. The first is a BMS to assess the performance and derive optimal strategies for inspection and maintenance of concrete bridge structures using reliability based and knowledge-based systems. The second is the concrete bridge rating expert system (<i>J-BMS BREX</i>) to evaluate the performance of existing bridges by incorporating with artificial neural networks and fuzzy reasoning.</span>
基金National Natural Science Foundation of China (81571326,81501153)National Key R&D Program of China (2017YFC0909200).
文摘Background Anxiety symptoms are common in mental diseases and a variety of physical disorders, especially in disorders related to stress. More and more basic studies have indicated that gut microbiota can regulate brain function through the gut-brain axis, and dysbiosis of intestinal microbiota was related to anxiety. However, there is no specific evidence to support treatment of anxiety by regulating intestinal microbiota. Aims To find evidence sup porting improvement of anxiety symptoms by regulation of intestinal microbiota. Methods This systematic review of randomised controlled trials was searched based on the following databases: PubMed, EMBASE, the Cochrane Library, OVID, Web of Knowledge, China National Knowledge Infrastructure (CNKI), Wanfang Data, VIP databases and SinoMed. The retrieval time dated back to 25 July 2018. Then we screened research literatures based on established inclusion and exclusion criteria. Quality evaluation for each included study was done using the Cochrane risk of bias and the Jadad scale. Results A total of 3334 articles were retrieved and 21 studies were included which contained 1503 subjects. In the 21 studies, 15 chose probiotics as interventions to regulate intestinal microbiota and six chose non-probiotic ways such as adjusting daily diets. Probiotic supplements in seven studies contained only one kind of probiotic, two studies used a product that contained two kinds of probiotics and the supplements used in the other five studies included at least three kinds of probiotics. In the studies that used treatment as usual plus interventions regulating intestinal flora (IRIF) as interventions (five studies), only non-probiotic ways were effective (two studies), which means 40% of studies were effective;in the studies that used IRIF alone (16 studies, 11 studies used probiotic ways and 5 studies used non-probiotic ways), 56% of studies could improve anxiety symptoms, and 80% of studies that conducted the non-probiotic interventions were effective, while 45% of studies that used probiotic supplementations had positive effects on anxiety symptoms. Overall, 11 studies showed a positive effect on anxiety symptoms by regulating intestinal microbiota, which indicated 52% of the 21 studies were effective, and there were five studies that used probiotic supplements as interventions and six used non-probiotic interventions. In addition, it should be noted that six of seven studies showed that regulation of intestinal microbiota could treat anxiety symptoms, the rate of efficacy was 86%.Conclusions We find that more than half of the studies included showed it was positive to treat anxiety symptoms by regulation of intestinal microbiota. There are two kinds of interventions (probiotic and non-probiotic interventions) to regulate intestinal microbiota, and it should be highlighted that the non-probiotic interventions were more effective than the probiotic interventions. More studies are needed to clarify this conclusion since we still cannot run meta-analysis so far.
