The wheels have a considerable influence on the aerodynamic properties and can contribute up to 25%of the total drag on modern vehicles.In this study,the effect of the wheel spoke structure on the aerodynamic performa...The wheels have a considerable influence on the aerodynamic properties and can contribute up to 25%of the total drag on modern vehicles.In this study,the effect of the wheel spoke structure on the aerodynamic performance of the isolated wheel is investigated.Subsequently,the 35°Ahmed body with an optimized spoke structure is used to analyze the flow behavior and the mechanism of drag reduction.The Fluent software is employed for this investigation,with an inlet velocity of 40 m/s.The accuracy of the numerical study is validated by comparing it with experimental results obtained from the classical Ahmed model.To gain a clearer understanding of the effects of the wheel spoke parameters on the aerodynamics of both the wheel and Ahmedmodel,and five design variables are proposed:the fillet angleα,the inside arc radius R1,the outside radius R2,and the same length of the chord L1 and L2.These variables characterize the wheel spoke structure.The Optimal Latin Hypercube designmethod is utilized to conduct the experimental design.Based on the simulation results of various wheel spoke designs,the Kriging model and the adaptive simulated annealing algorithm is selected to optimize the design parameters.The objective is to achieve the best combination for maximum drag reduction.It is indicated that the optimized spoke structure resulted in amaximum drag reduction of 5.7%and 4.7%for the drag coefficient of the isolated wheel and Ahmed body,respectively.The drag reduction is primarily attributed to changes in the flow state around the wheel,which suppressed separation bubbles.Additionally,it influenced the boundary layer thickness around the car body and reduced the turbulent kinetic energy in the wake flow.These effects collectively contributed to the observed drag reduction.展开更多
Altwijri and Alsirhy reported a case of uveitis-glaucoma-hyphema syndrome after an Ahmed glaucoma valve implantation surgery in an advanced primary open-angle glaucoma patient,being the first ever recorded of its kind...Altwijri and Alsirhy reported a case of uveitis-glaucoma-hyphema syndrome after an Ahmed glaucoma valve implantation surgery in an advanced primary open-angle glaucoma patient,being the first ever recorded of its kind.The author describes the position of the tube as the origin of the anterior chamber inflam-mation and hyphema,which resolved shortly after shortening and relocating it.This publication emphasizes the importance of precise implant positioning and close-up patient follow-up after glaucoma filtration surgery as an important standard for healthcare providers.展开更多
2023年3月,《针灸和草药(英文)》(AHM)收到来自Scopus数据库遴选与审查委员会(CSAB)通知,经过严格评审,AHM被Scopus数据库正式收录!AHM在2019年12月入选中国科技期刊卓越行动计划高起点新刊项目,2022年5月被Directory of Open Access Jo...2023年3月,《针灸和草药(英文)》(AHM)收到来自Scopus数据库遴选与审查委员会(CSAB)通知,经过严格评审,AHM被Scopus数据库正式收录!AHM在2019年12月入选中国科技期刊卓越行动计划高起点新刊项目,2022年5月被Directory of Open Access Journals(DOAJ)数据库收录。2023年3月再度被世界一流学术研究数据库收录,标志着该刊迈上一个新的台阶。在此,衷心感谢各位专家学者、读者、审稿人以及编委团队的大力支持与贡献。AHM将秉持初心,争创国际高水平学术期刊,继续为更多的专家学者和广大读者提供优质的出版服务!展开更多
BACKGROUND Glaucoma is caused by increased intraocular pressure(IOP)that damages the optic nerve,leading to blindness.The Ahmed glaucoma valve(AGV)is a glau-coma drainage implant device that is used in glaucoma patien...BACKGROUND Glaucoma is caused by increased intraocular pressure(IOP)that damages the optic nerve,leading to blindness.The Ahmed glaucoma valve(AGV)is a glau-coma drainage implant device that is used in glaucoma patients with uncontrolled IOP.A possible complication after any ocular surgery however is hyphema,which can itself progress to uveitis glaucoma hyphema(UGH)syndrome on rare occasions.UGH syndrome has not yet been reported as a complication of AGV implantation.CASE SUMMARY Here,we have reported a case of a 55-year-old female who developed both hyphema and pigmentation as a result of AGV implantation.We confirmed UGH syndrome secondary to AGV implantation after the patient underwent another surgery to shorten and reposition the AGV tube.After the second surgery,the patient’s IOP was reduced,and she had a clear cornea and no signs of hyphema.CONCLUSION This first report of UGH syndrome as a complication of AGV implantation reminds clinicians that frequent follow-up is paramount.展开更多
2023年3月,《针灸和草药(英文)》(AHM)收到来自Scopus数据库遴选与审查委员会(CSAB)通知,经过严格评审,AHM被Scopus数据库正式收录!AHM在2019年12月入选中国科技期刊卓越行动计划高起点新刊项目,2022年5月被Directory of Open Access Jo...2023年3月,《针灸和草药(英文)》(AHM)收到来自Scopus数据库遴选与审查委员会(CSAB)通知,经过严格评审,AHM被Scopus数据库正式收录!AHM在2019年12月入选中国科技期刊卓越行动计划高起点新刊项目,2022年5月被Directory of Open Access Journals(DOAJ)数据库收录。2023年3月再度被世界一流学术研究数据库收录,标志着该刊迈上一个新的台阶。在此,衷心感谢各位专家学者、读者、审稿人以及编委团队的大力支持与贡献。展开更多
2023年3月,《针灸和草药(英文)》(AHM)收到来自Scopus数据库遴选与审查委员会(CSAB)通知,经过严格评审,AHM被Scopus数据库正式收录!AHM在2019年12月入选中国科技期刊卓越行动计划高起点新刊项目,2022年5月被Directory of Open Access Jo...2023年3月,《针灸和草药(英文)》(AHM)收到来自Scopus数据库遴选与审查委员会(CSAB)通知,经过严格评审,AHM被Scopus数据库正式收录!AHM在2019年12月入选中国科技期刊卓越行动计划高起点新刊项目,2022年5月被Directory of Open Access Journals(DOAJ)数据库收录。展开更多
基金funding of the National Natural Science Foundation of China (Nos.52072156,51605198)Postdoctoral Foundation of China (2020M682269).
文摘The wheels have a considerable influence on the aerodynamic properties and can contribute up to 25%of the total drag on modern vehicles.In this study,the effect of the wheel spoke structure on the aerodynamic performance of the isolated wheel is investigated.Subsequently,the 35°Ahmed body with an optimized spoke structure is used to analyze the flow behavior and the mechanism of drag reduction.The Fluent software is employed for this investigation,with an inlet velocity of 40 m/s.The accuracy of the numerical study is validated by comparing it with experimental results obtained from the classical Ahmed model.To gain a clearer understanding of the effects of the wheel spoke parameters on the aerodynamics of both the wheel and Ahmedmodel,and five design variables are proposed:the fillet angleα,the inside arc radius R1,the outside radius R2,and the same length of the chord L1 and L2.These variables characterize the wheel spoke structure.The Optimal Latin Hypercube designmethod is utilized to conduct the experimental design.Based on the simulation results of various wheel spoke designs,the Kriging model and the adaptive simulated annealing algorithm is selected to optimize the design parameters.The objective is to achieve the best combination for maximum drag reduction.It is indicated that the optimized spoke structure resulted in amaximum drag reduction of 5.7%and 4.7%for the drag coefficient of the isolated wheel and Ahmed body,respectively.The drag reduction is primarily attributed to changes in the flow state around the wheel,which suppressed separation bubbles.Additionally,it influenced the boundary layer thickness around the car body and reduced the turbulent kinetic energy in the wake flow.These effects collectively contributed to the observed drag reduction.
文摘Altwijri and Alsirhy reported a case of uveitis-glaucoma-hyphema syndrome after an Ahmed glaucoma valve implantation surgery in an advanced primary open-angle glaucoma patient,being the first ever recorded of its kind.The author describes the position of the tube as the origin of the anterior chamber inflam-mation and hyphema,which resolved shortly after shortening and relocating it.This publication emphasizes the importance of precise implant positioning and close-up patient follow-up after glaucoma filtration surgery as an important standard for healthcare providers.
文摘2023年3月,《针灸和草药(英文)》(AHM)收到来自Scopus数据库遴选与审查委员会(CSAB)通知,经过严格评审,AHM被Scopus数据库正式收录!AHM在2019年12月入选中国科技期刊卓越行动计划高起点新刊项目,2022年5月被Directory of Open Access Journals(DOAJ)数据库收录。2023年3月再度被世界一流学术研究数据库收录,标志着该刊迈上一个新的台阶。在此,衷心感谢各位专家学者、读者、审稿人以及编委团队的大力支持与贡献。AHM将秉持初心,争创国际高水平学术期刊,继续为更多的专家学者和广大读者提供优质的出版服务!
文摘BACKGROUND Glaucoma is caused by increased intraocular pressure(IOP)that damages the optic nerve,leading to blindness.The Ahmed glaucoma valve(AGV)is a glau-coma drainage implant device that is used in glaucoma patients with uncontrolled IOP.A possible complication after any ocular surgery however is hyphema,which can itself progress to uveitis glaucoma hyphema(UGH)syndrome on rare occasions.UGH syndrome has not yet been reported as a complication of AGV implantation.CASE SUMMARY Here,we have reported a case of a 55-year-old female who developed both hyphema and pigmentation as a result of AGV implantation.We confirmed UGH syndrome secondary to AGV implantation after the patient underwent another surgery to shorten and reposition the AGV tube.After the second surgery,the patient’s IOP was reduced,and she had a clear cornea and no signs of hyphema.CONCLUSION This first report of UGH syndrome as a complication of AGV implantation reminds clinicians that frequent follow-up is paramount.
文摘2023年3月,《针灸和草药(英文)》(AHM)收到来自Scopus数据库遴选与审查委员会(CSAB)通知,经过严格评审,AHM被Scopus数据库正式收录!AHM在2019年12月入选中国科技期刊卓越行动计划高起点新刊项目,2022年5月被Directory of Open Access Journals(DOAJ)数据库收录。2023年3月再度被世界一流学术研究数据库收录,标志着该刊迈上一个新的台阶。在此,衷心感谢各位专家学者、读者、审稿人以及编委团队的大力支持与贡献。
文摘2023年3月,《针灸和草药(英文)》(AHM)收到来自Scopus数据库遴选与审查委员会(CSAB)通知,经过严格评审,AHM被Scopus数据库正式收录!AHM在2019年12月入选中国科技期刊卓越行动计划高起点新刊项目,2022年5月被Directory of Open Access Journals(DOAJ)数据库收录。
