背景:体外冲击波因对各种肌肉骨骼疾病的潜在益处而备受关注,越来越多的研究证明其具有缓解疼痛和功能恢复等优良效果。然而,针对体外冲击波治疗疼痛相关可视化研究相对缺乏。目的:对体外冲击波治疗疼痛相关研究进行可视化分析,梳理国...背景:体外冲击波因对各种肌肉骨骼疾病的潜在益处而备受关注,越来越多的研究证明其具有缓解疼痛和功能恢复等优良效果。然而,针对体外冲击波治疗疼痛相关可视化研究相对缺乏。目的:对体外冲击波治疗疼痛相关研究进行可视化分析,梳理国内外该领域的知识结构、探索研究现状及热点趋势。方法:检索Web of Science(WOS)核心合集数据库及中国知网(CNKI)数据库中2002-2022年间体外冲击波治疗疼痛相关研究的文献,利用Citespace软件进行可视化分析制作图谱并解读其涵义。结果与结论:①共纳入文献2101篇,发文量呈波动性上升趋势,美国和中国在发文量具有一定优势;发文机构多为大学和医院,发文作者多属于独立团队,发文机构及作者彼此交流有待加强,跨机构、跨地域合作度较低;关键词可视化分析表明体外冲击波在肌骨疾病应用广泛,未来研究侧重于多学科深入研究及联合疗法的临床疗效观察。②体外冲击波应用于疼痛领域的研究主要集中在足底筋膜炎、肩周炎、网球肘等肌肉骨骼疾病的治疗。近年来与超声引导注射治疗、中国传统治疗技术的联合治疗及新领域的拓展是研究趋势及关注热点。展开更多
When a shock wave interacts with a group of solid spheres,non-linear aerodynamic behaviors come into effect.The complicated wave reflections such as the Mach reflection occur in the wave propagation process.The wave i...When a shock wave interacts with a group of solid spheres,non-linear aerodynamic behaviors come into effect.The complicated wave reflections such as the Mach reflection occur in the wave propagation process.The wave interactions with vortices behind each sphere's wake cause fluctuation in the pressure profiles of shock waves.This paper reports an experimental study for the aerodynamic processes involved in the interaction between shock waves and solid spheres.A schlieren photography was applied to visualize the various shock waves passing through solid spheres.Pressure measurements were performed along different downstream positions.The experiments were conducted in both rectangular and circular shock tubes.The data with respect to the effect of the sphere array, size,interval distance,incident Mach number,etc.,on the shock wave attenuation were obtained.展开更多
Numerical and experimental study to evaluate aerodynamic characteristics in supersonic ow over a double wedge airfoil is carried out using Fluent software and a supersonic wind tunnel, respectively. The Schlieren visu...Numerical and experimental study to evaluate aerodynamic characteristics in supersonic ow over a double wedge airfoil is carried out using Fluent software and a supersonic wind tunnel, respectively. The Schlieren visualization method was also used to develop the experimental step of this study. The supersonic wind tunnel reached a proximately a Mach number of 1.8. The result got showed oblique shock waves visualization on double-wedge airfoil and the numerical simulation, the flow behavior as function of Mach number, pressure, temperature and density in the flow field on the computational model. The simulation allowed to observe the shock wave and the expansion fan in the leading and tailing edge of double-wedge airfoil. From the numerical and experimental comparison, an agreement at the shock wave angle and Mach number was observed, with a difference about 1.17% from the experimental results.展开更多
Two-dimensional critical nozzle flows at low Reynolds numbers are visualized by the rainbow schlieren deflectometry. Experiments have been performed in a region of overexpanded nozzle flow. The variation of the shock ...Two-dimensional critical nozzle flows at low Reynolds numbers are visualized by the rainbow schlieren deflectometry. Experiments have been performed in a region of overexpanded nozzle flow. The variation of the shock structure against the back pressure ratio can be clearly visible with color gradation. Static pressure rises due to the shock-induced flow separation are compared with the previous theories. The unsteady characteristics of overexpanded critical nozzle flows at low Reynolds numbers are quantitatively and qualitatively visualized using laser schlieren and Mach-Zehnder interferometer systems combined with a high-speed digital camera. It was found that an oscillating normal shock wave appears inside the nozzle, and that the shock wave has a specified dominant frequency. Also the time-history of the oscillating shock wave is obtained from both the systems and compared with each other.展开更多
目的分析国内外创伤性休克研究的发文情况、研究热点及研究趋势,为相关人员开展创伤性休克研究提供参考。方法在中国知网与Web of Science(WOS)核心合集数据库检索与创伤性休克相关的文献,检索日期均截至2022年10月1日。运用VOSviewer 1...目的分析国内外创伤性休克研究的发文情况、研究热点及研究趋势,为相关人员开展创伤性休克研究提供参考。方法在中国知网与Web of Science(WOS)核心合集数据库检索与创伤性休克相关的文献,检索日期均截至2022年10月1日。运用VOSviewer 1.6.18软件进行可视化聚类分析。结果共检索到中国知网文献2860篇,WOS数据库文献832篇。WOS数据库与中国知网发文量排名第一的期刊分别是Shock和创伤外科杂志;发文量排名第一的机构分别为Rutgers State University New Brunswick(罗格斯大学新布朗斯维克分校)和第三军医大学大坪医院;中国知网的创伤性休克研究热点集中于创伤失血性休克、创伤性休克的早期救治及其护理等方面,WOS数据库的创伤性休克研究热点集中于创伤失血性休克、创伤性休克基础研究及急救等方面。结论创伤性休克研究的发文量基本呈上升趋势,围绕创伤性休克展开的基础研究仍是热点领域,未来研究者可针对该领域的基础研究、早期液体复苏、院前高效急救、远程快速救治及综合护理干预开展更多的研究。展开更多
文摘背景:体外冲击波因对各种肌肉骨骼疾病的潜在益处而备受关注,越来越多的研究证明其具有缓解疼痛和功能恢复等优良效果。然而,针对体外冲击波治疗疼痛相关可视化研究相对缺乏。目的:对体外冲击波治疗疼痛相关研究进行可视化分析,梳理国内外该领域的知识结构、探索研究现状及热点趋势。方法:检索Web of Science(WOS)核心合集数据库及中国知网(CNKI)数据库中2002-2022年间体外冲击波治疗疼痛相关研究的文献,利用Citespace软件进行可视化分析制作图谱并解读其涵义。结果与结论:①共纳入文献2101篇,发文量呈波动性上升趋势,美国和中国在发文量具有一定优势;发文机构多为大学和医院,发文作者多属于独立团队,发文机构及作者彼此交流有待加强,跨机构、跨地域合作度较低;关键词可视化分析表明体外冲击波在肌骨疾病应用广泛,未来研究侧重于多学科深入研究及联合疗法的临床疗效观察。②体外冲击波应用于疼痛领域的研究主要集中在足底筋膜炎、肩周炎、网球肘等肌肉骨骼疾病的治疗。近年来与超声引导注射治疗、中国传统治疗技术的联合治疗及新领域的拓展是研究趋势及关注热点。
基金The project supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry,China,and the "BaiRen" Plan of Chinese Academy of Sciences
文摘When a shock wave interacts with a group of solid spheres,non-linear aerodynamic behaviors come into effect.The complicated wave reflections such as the Mach reflection occur in the wave propagation process.The wave interactions with vortices behind each sphere's wake cause fluctuation in the pressure profiles of shock waves.This paper reports an experimental study for the aerodynamic processes involved in the interaction between shock waves and solid spheres.A schlieren photography was applied to visualize the various shock waves passing through solid spheres.Pressure measurements were performed along different downstream positions.The experiments were conducted in both rectangular and circular shock tubes.The data with respect to the effect of the sphere array, size,interval distance,incident Mach number,etc.,on the shock wave attenuation were obtained.
文摘Numerical and experimental study to evaluate aerodynamic characteristics in supersonic ow over a double wedge airfoil is carried out using Fluent software and a supersonic wind tunnel, respectively. The Schlieren visualization method was also used to develop the experimental step of this study. The supersonic wind tunnel reached a proximately a Mach number of 1.8. The result got showed oblique shock waves visualization on double-wedge airfoil and the numerical simulation, the flow behavior as function of Mach number, pressure, temperature and density in the flow field on the computational model. The simulation allowed to observe the shock wave and the expansion fan in the leading and tailing edge of double-wedge airfoil. From the numerical and experimental comparison, an agreement at the shock wave angle and Mach number was observed, with a difference about 1.17% from the experimental results.
文摘Two-dimensional critical nozzle flows at low Reynolds numbers are visualized by the rainbow schlieren deflectometry. Experiments have been performed in a region of overexpanded nozzle flow. The variation of the shock structure against the back pressure ratio can be clearly visible with color gradation. Static pressure rises due to the shock-induced flow separation are compared with the previous theories. The unsteady characteristics of overexpanded critical nozzle flows at low Reynolds numbers are quantitatively and qualitatively visualized using laser schlieren and Mach-Zehnder interferometer systems combined with a high-speed digital camera. It was found that an oscillating normal shock wave appears inside the nozzle, and that the shock wave has a specified dominant frequency. Also the time-history of the oscillating shock wave is obtained from both the systems and compared with each other.
文摘目的分析国内外创伤性休克研究的发文情况、研究热点及研究趋势,为相关人员开展创伤性休克研究提供参考。方法在中国知网与Web of Science(WOS)核心合集数据库检索与创伤性休克相关的文献,检索日期均截至2022年10月1日。运用VOSviewer 1.6.18软件进行可视化聚类分析。结果共检索到中国知网文献2860篇,WOS数据库文献832篇。WOS数据库与中国知网发文量排名第一的期刊分别是Shock和创伤外科杂志;发文量排名第一的机构分别为Rutgers State University New Brunswick(罗格斯大学新布朗斯维克分校)和第三军医大学大坪医院;中国知网的创伤性休克研究热点集中于创伤失血性休克、创伤性休克的早期救治及其护理等方面,WOS数据库的创伤性休克研究热点集中于创伤失血性休克、创伤性休克基础研究及急救等方面。结论创伤性休克研究的发文量基本呈上升趋势,围绕创伤性休克展开的基础研究仍是热点领域,未来研究者可针对该领域的基础研究、早期液体复苏、院前高效急救、远程快速救治及综合护理干预开展更多的研究。
