目的:通过文献计量学方法统计分析已公开发表的牙髓炎相关文献,展示和探究牙髓炎的研究现状、热点及未来趋势。方法:在Web of Science数据库检索所有牙髓炎相关文献,根据纳入排除标准筛选符合要求的文献,通过Citespace、VOSviewer和SCIm...目的:通过文献计量学方法统计分析已公开发表的牙髓炎相关文献,展示和探究牙髓炎的研究现状、热点及未来趋势。方法:在Web of Science数据库检索所有牙髓炎相关文献,根据纳入排除标准筛选符合要求的文献,通过Citespace、VOSviewer和SCImago Graphica进行可视化分析,主要分析内容为年发文量、国家/地区、机构、作者及关键词。结果:共检索符合统计标准的文献2767篇,1916~2010年是该领域的缓慢发展阶段,2011~2024年是该领域的急速进展阶段。美国在该领域研究最多,同时也是与他国合作最为紧密的国家。四川大学、University of São Paulo和Ohio State University的研究较为深入。Reader A是贡献最大的研究者。Journal of Endodontics、International Endodontic Journal和Journal of Dental Research是该领域的核心期刊。最常见的关键词为irreversible pulpitis、pulpitis和inflammation。结论:目前是牙髓炎研究的高峰期,本研究通过文献计量学方法全面剖析了牙髓炎的研究现状及趋势,为后续探究该领域的研究人员提供了一定参考。展开更多
In order to study the influence of longitudinal slope on the mechanical response of steel deck pavement,a method of slope-modulus transformation was proposed for the mechanical analysis of the steel deck pavement base...In order to study the influence of longitudinal slope on the mechanical response of steel deck pavement,a method of slope-modulus transformation was proposed for the mechanical analysis of the steel deck pavement based on the time-temperature equivalence principle.Considering the mechanical action on a slope,a finite element model of the deck pavement was established to determine the critical load position of tensileand shear stress of the steel deck pavement.Additionally,the influence of longitudinal slope on the mechanical response of the deck pavement under the conditions of uniform speed and emergency braking was analyzed.The results indicate that the maximum transverse tensile stress at the pavement surface and the maximum transverse shear stress at the pavement bottom are always greater than their longitudinal counterparts under uniform speed.Under emergency braking,however,the critical slope gradient of t e maximum transverse and longitudinal tensile stress at t e pavement surface is 6%.The maximum longitudinal shear stess at t e pavement bottom is always greater ta n t e maximum tansverse shear stess.This stidy is helpful in t e strctural design of large longitudinal slope steel deck pavements.展开更多
文摘目的:通过文献计量学方法统计分析已公开发表的牙髓炎相关文献,展示和探究牙髓炎的研究现状、热点及未来趋势。方法:在Web of Science数据库检索所有牙髓炎相关文献,根据纳入排除标准筛选符合要求的文献,通过Citespace、VOSviewer和SCImago Graphica进行可视化分析,主要分析内容为年发文量、国家/地区、机构、作者及关键词。结果:共检索符合统计标准的文献2767篇,1916~2010年是该领域的缓慢发展阶段,2011~2024年是该领域的急速进展阶段。美国在该领域研究最多,同时也是与他国合作最为紧密的国家。四川大学、University of São Paulo和Ohio State University的研究较为深入。Reader A是贡献最大的研究者。Journal of Endodontics、International Endodontic Journal和Journal of Dental Research是该领域的核心期刊。最常见的关键词为irreversible pulpitis、pulpitis和inflammation。结论:目前是牙髓炎研究的高峰期,本研究通过文献计量学方法全面剖析了牙髓炎的研究现状及趋势,为后续探究该领域的研究人员提供了一定参考。
基金The National Science Foundation of China(No.51778142)
文摘In order to study the influence of longitudinal slope on the mechanical response of steel deck pavement,a method of slope-modulus transformation was proposed for the mechanical analysis of the steel deck pavement based on the time-temperature equivalence principle.Considering the mechanical action on a slope,a finite element model of the deck pavement was established to determine the critical load position of tensileand shear stress of the steel deck pavement.Additionally,the influence of longitudinal slope on the mechanical response of the deck pavement under the conditions of uniform speed and emergency braking was analyzed.The results indicate that the maximum transverse tensile stress at the pavement surface and the maximum transverse shear stress at the pavement bottom are always greater than their longitudinal counterparts under uniform speed.Under emergency braking,however,the critical slope gradient of t e maximum transverse and longitudinal tensile stress at t e pavement surface is 6%.The maximum longitudinal shear stess at t e pavement bottom is always greater ta n t e maximum tansverse shear stess.This stidy is helpful in t e strctural design of large longitudinal slope steel deck pavements.
