目的量化关于心脏手术体外循环目标导向灌注(GDP)相关学术论文的基本信息,探索关于GDP研究领域的研究热点、趋势及最具有影响力的论文,为研究人员及临床工作者提供参考。方法利用科学网(Web of Science)检索GDP相关文献,使用R语言数据包...目的量化关于心脏手术体外循环目标导向灌注(GDP)相关学术论文的基本信息,探索关于GDP研究领域的研究热点、趋势及最具有影响力的论文,为研究人员及临床工作者提供参考。方法利用科学网(Web of Science)检索GDP相关文献,使用R语言数据包Bibliometrix对文献的发表年代、期刊来源及期刊所属国家、高频关键词的分布情况进行统计分析,并进行聚类分析,得到该GDP研究领域关注热点。结果筛选出GDP相关文献116篇,获得该领域研究热度趋势、来源期刊分布、各国研究热度等数据资料。高频关键词共计15个,通过对高频关键词进行聚类分析,得到3个主要研究热点方向。关于GDP研究领域的热点有氧供指数、氧耗监测、组织灌注监测等。结论GDP研究热点主要为GDP研究内容和技术、对象、临床结局。基于文献计量学的研究方法,本研究提供较为全面的关于GDP研究领域发展的分析总结,未来该领域的氧供与氧耗监测与调控仍可能是热门研究方向。展开更多
目的利用文献计量学方法分析量化小儿心脏术后急性肾损伤(CS-AKI)的研究现状、热点及前沿,为临床工作者和相关研究人员提供参考。方法利用Web of Science检索2005~2024年间小儿CS-AKI相关文献,利用R语言数据包Bibliometrix对文献发表年...目的利用文献计量学方法分析量化小儿心脏术后急性肾损伤(CS-AKI)的研究现状、热点及前沿,为临床工作者和相关研究人员提供参考。方法利用Web of Science检索2005~2024年间小儿CS-AKI相关文献,利用R语言数据包Bibliometrix对文献发表年代、期刊、作者及关键词等进行可视化分析。结果筛选出小儿CS-AKI相关文献558篇,发文量呈逐年上升趋势。发文量前三的期刊为Pediatric Critical Care Medicine、Pediatric Nephrology、Pediatric Cardiology。全球小儿CS-AKI的作者中,Devarajan P、Goldstein SL、Zappitelli M为重要核心作者,且美国生产力最高。高频关键词为小儿CS-AKI的危险因素、病因及发病机制、预后、预测因子及防治措施。结论小儿CS-AKI近年来逐渐被重视,研究热点主要为CS-AKI的危险因素与预后、病因与发病机制及防治措施。未来该领域的预测指标与保护措施仍可能是热门研究方向。展开更多
以中国的29个省区作为研究单元,运用脱钩指数研究经济增长与碳排放动态耦合关系。基于LMDI(logarithmic mean Divisia index)因素分解法,从经济的规模增长、结构转型和技术升级等3个方面对各省区碳排放变化进行解析。对1990—2014年期...以中国的29个省区作为研究单元,运用脱钩指数研究经济增长与碳排放动态耦合关系。基于LMDI(logarithmic mean Divisia index)因素分解法,从经济的规模增长、结构转型和技术升级等3个方面对各省区碳排放变化进行解析。对1990—2014年期间的研究有如下结果:1)中国的经济不断上升,碳排放也呈逐年增加趋势,而碳排放强度却逐渐下降,整体呈现“绿色转型”态势。从空间格局看,碳排放高的省区分布在北部沿海和西南经济区。2)中国的29个省区主要处于绝对脱钩、相对脱钩和扩张性负脱钩3种状态,不同省区经济发展与碳排放的耦合关系随着时间的变化而发生演化。3)中国经济增长过程中,经济规模的增长对碳排放增长整体呈现正向驱动作用,而技术的进步和产业结构调整的作用因区域而异。不同时期,中国各省区碳排放的主导效应也具有差异性,主导效应主要为规模效应和技术效应,结构效应的影响最小。展开更多
目的系统性评价利用3D打印心脏模型进行先天性心脏病教学的有效性。方法计算机检索PubMed、Web of Science、EMbase数据库中关于3D打印心脏模型应用于先天性心脏病教学的文献,并用Meta分析评估其效果。检索时限为建库至2022年11月10日...目的系统性评价利用3D打印心脏模型进行先天性心脏病教学的有效性。方法计算机检索PubMed、Web of Science、EMbase数据库中关于3D打印心脏模型应用于先天性心脏病教学的文献,并用Meta分析评估其效果。检索时限为建库至2022年11月10日。两位研究者独立筛选文献、提取数据和评价文献质量。随机对照试验质量评价采用Cochrane文献评价标准,横断面和队列研究采用JBI评价量表。使用R软件进行Meta分析。结果筛选后纳入23篇文献,其中随机对照试验7篇、横断面研究15篇、队列研究1篇。随机对照试验均为低风险偏倚,横断面研究和队列研究均存在潜在偏倚。3D打印心脏模型与2D图像教学比较的文献有4篇,其Meta分析结果显示,两组对理论成绩的影响差异有统计学意义[SMD=0.31,95%CI(–0.28,0.91),P=0.05]。结论3D打印心脏模型对先天性心脏病教学效果有一定的促进作用,但未来仍需要更多随机对照试验提供相关证据。展开更多
Energy development has a significant impact on urbanization. This study employs the entropy method to evaluate the level of urbanization in Central Asia and further analyzes the possible dynamic transition mechanisms ...Energy development has a significant impact on urbanization. This study employs the entropy method to evaluate the level of urbanization in Central Asia and further analyzes the possible dynamic transition mechanisms of the impact of energy development (characterized by energy development scale, energy trade, energy consumption, and energy endowment) on urbanization using the Panel Smooth Transition Regression model (PSTR). The results demonstrate that energy development in this region is characterized by “three highs and one low”, namely, high production volume, high export volume, high endowment, and low self-consumption, and plays a crucial role in the progress of urbanization. A nonlinear relationship is found to exist between energy development and comprehensive urbanization in the transition economies of Central Asia. Generally speaking, as energy development continues to expand, its impact on urbanization in this region has shifted from constraint to promotion, with the latter gradually tending to flatten out. Energy development characterized by energy development scale, energy consumption, and energy trade can prove the point, whose threshold is 1.47 million tons oil equivalent (Mtoe), 0.29 tons oil equivalent (toe) per capita, and 20.95 Mtoe, respectively. However, not all energy development models exhibit this behavior. Energy development characterized by energy endowment is such a case where the positive effect of it on comprehensive urbanization will be restrained when it exceeds 3.18. These findings can aid decision makers in seeking a better energy development model to promote the sustainable development of urbanization in Central Asia, avoiding energy resources waste and disorderly development.展开更多
Central Asia is emerging as an important pole of global economic and political power,thanks to its unique location at the heart of Eurasia and its abundance in energy reserves.This study explores the social power chan...Central Asia is emerging as an important pole of global economic and political power,thanks to its unique location at the heart of Eurasia and its abundance in energy reserves.This study explores the social power change in Central Asia from the perspective of cross-border mergers and acquisitions(M&A)by using the social network method.The main results are as follows:(1)The complexity of the energy M&A network has significantly decreased after the financial crisis in 2008.In the meantime,energy M&A became an important way to enhance energy power for buyer countries.Betweenness centrality is becoming the most significant factor affecting energy power,yet the effect of out-degree is weakening.(2)The community underwent multifaceted restructuring,which reflected the shift of energy power in Central Asia.Kazakhstan is the most powerful country in the energy sector in Central Asia.In addition,East Asian countries/regions,represented by China,are actively enhancing their energy power.(3)Different M&A modes reflect various M&A motivations of countries in the energy sector.In the future,more efforts should be made to promote the establishment of a pragmatic and efficient multilateral energy cooperation mechanism and strength the cooperation of the economy and energy finance when China participates in the energy market in Central Asia.展开更多
文摘目的量化关于心脏手术体外循环目标导向灌注(GDP)相关学术论文的基本信息,探索关于GDP研究领域的研究热点、趋势及最具有影响力的论文,为研究人员及临床工作者提供参考。方法利用科学网(Web of Science)检索GDP相关文献,使用R语言数据包Bibliometrix对文献的发表年代、期刊来源及期刊所属国家、高频关键词的分布情况进行统计分析,并进行聚类分析,得到该GDP研究领域关注热点。结果筛选出GDP相关文献116篇,获得该领域研究热度趋势、来源期刊分布、各国研究热度等数据资料。高频关键词共计15个,通过对高频关键词进行聚类分析,得到3个主要研究热点方向。关于GDP研究领域的热点有氧供指数、氧耗监测、组织灌注监测等。结论GDP研究热点主要为GDP研究内容和技术、对象、临床结局。基于文献计量学的研究方法,本研究提供较为全面的关于GDP研究领域发展的分析总结,未来该领域的氧供与氧耗监测与调控仍可能是热门研究方向。
文摘以中国的29个省区作为研究单元,运用脱钩指数研究经济增长与碳排放动态耦合关系。基于LMDI(logarithmic mean Divisia index)因素分解法,从经济的规模增长、结构转型和技术升级等3个方面对各省区碳排放变化进行解析。对1990—2014年期间的研究有如下结果:1)中国的经济不断上升,碳排放也呈逐年增加趋势,而碳排放强度却逐渐下降,整体呈现“绿色转型”态势。从空间格局看,碳排放高的省区分布在北部沿海和西南经济区。2)中国的29个省区主要处于绝对脱钩、相对脱钩和扩张性负脱钩3种状态,不同省区经济发展与碳排放的耦合关系随着时间的变化而发生演化。3)中国经济增长过程中,经济规模的增长对碳排放增长整体呈现正向驱动作用,而技术的进步和产业结构调整的作用因区域而异。不同时期,中国各省区碳排放的主导效应也具有差异性,主导效应主要为规模效应和技术效应,结构效应的影响最小。
文摘目的系统性评价利用3D打印心脏模型进行先天性心脏病教学的有效性。方法计算机检索PubMed、Web of Science、EMbase数据库中关于3D打印心脏模型应用于先天性心脏病教学的文献,并用Meta分析评估其效果。检索时限为建库至2022年11月10日。两位研究者独立筛选文献、提取数据和评价文献质量。随机对照试验质量评价采用Cochrane文献评价标准,横断面和队列研究采用JBI评价量表。使用R软件进行Meta分析。结果筛选后纳入23篇文献,其中随机对照试验7篇、横断面研究15篇、队列研究1篇。随机对照试验均为低风险偏倚,横断面研究和队列研究均存在潜在偏倚。3D打印心脏模型与2D图像教学比较的文献有4篇,其Meta分析结果显示,两组对理论成绩的影响差异有统计学意义[SMD=0.31,95%CI(–0.28,0.91),P=0.05]。结论3D打印心脏模型对先天性心脏病教学效果有一定的促进作用,但未来仍需要更多随机对照试验提供相关证据。
基金The Strategic Priority Research of the CAS,No.XDA20040400National Natural Science Foundation of China,No.41871118,No.4202200。
文摘Energy development has a significant impact on urbanization. This study employs the entropy method to evaluate the level of urbanization in Central Asia and further analyzes the possible dynamic transition mechanisms of the impact of energy development (characterized by energy development scale, energy trade, energy consumption, and energy endowment) on urbanization using the Panel Smooth Transition Regression model (PSTR). The results demonstrate that energy development in this region is characterized by “three highs and one low”, namely, high production volume, high export volume, high endowment, and low self-consumption, and plays a crucial role in the progress of urbanization. A nonlinear relationship is found to exist between energy development and comprehensive urbanization in the transition economies of Central Asia. Generally speaking, as energy development continues to expand, its impact on urbanization in this region has shifted from constraint to promotion, with the latter gradually tending to flatten out. Energy development characterized by energy development scale, energy consumption, and energy trade can prove the point, whose threshold is 1.47 million tons oil equivalent (Mtoe), 0.29 tons oil equivalent (toe) per capita, and 20.95 Mtoe, respectively. However, not all energy development models exhibit this behavior. Energy development characterized by energy endowment is such a case where the positive effect of it on comprehensive urbanization will be restrained when it exceeds 3.18. These findings can aid decision makers in seeking a better energy development model to promote the sustainable development of urbanization in Central Asia, avoiding energy resources waste and disorderly development.
基金The Strategic Priority Research of the CAS,No.XDA20040400National Natural Science Foundation of China,No.41871118,No.42022007China Scholarship Council,No.201904910633。
文摘Central Asia is emerging as an important pole of global economic and political power,thanks to its unique location at the heart of Eurasia and its abundance in energy reserves.This study explores the social power change in Central Asia from the perspective of cross-border mergers and acquisitions(M&A)by using the social network method.The main results are as follows:(1)The complexity of the energy M&A network has significantly decreased after the financial crisis in 2008.In the meantime,energy M&A became an important way to enhance energy power for buyer countries.Betweenness centrality is becoming the most significant factor affecting energy power,yet the effect of out-degree is weakening.(2)The community underwent multifaceted restructuring,which reflected the shift of energy power in Central Asia.Kazakhstan is the most powerful country in the energy sector in Central Asia.In addition,East Asian countries/regions,represented by China,are actively enhancing their energy power.(3)Different M&A modes reflect various M&A motivations of countries in the energy sector.In the future,more efforts should be made to promote the establishment of a pragmatic and efficient multilateral energy cooperation mechanism and strength the cooperation of the economy and energy finance when China participates in the energy market in Central Asia.
