Long-time driving and monotonous visual environment increase the safety risk of driving in an extra-long tunnel.Driving fatigue can be effectively relieved by setting the visual fatigue relief zone in the tunnel.Howev...Long-time driving and monotonous visual environment increase the safety risk of driving in an extra-long tunnel.Driving fatigue can be effectively relieved by setting the visual fatigue relief zone in the tunnel.However,the setting form of visual fatigue relief zone,such as its length and location,is difficult to be designed and quantified.By integrating virtual reality(VR)apparatus with wearable electroencephalogram(EEG)-based devices,a hybrid method was proposed in this study to assist analyzers to formulate the layout of visual fatigue relief zone in the extra-long tunnel.The virtual environment of this study was based on an 11.5 km extra-long tunnel located in Yunnan Province in China.The results indicated that the use of natural landscape decoration inside the tunnel could improve driving fatigue with the growth rate of attention of the driver increased by more than 20%.The accumulation of driving fatigue had a negative effect on the fatigue relief.The results demonstrated that the optimal location of the fatigue relief zone was at the place where driving fatigue had just occurred rather than at the place where a certain amount of driving fatigue had accumulated.展开更多
On super-sonic or trans-sonic planar cascade wind tunnel of free jet intermittent type, wind blowing experiments were performed on the typical sections of stator and rotor blades in the last stage of ultra-ultra-criti...On super-sonic or trans-sonic planar cascade wind tunnel of free jet intermittent type, wind blowing experiments were performed on the typical sections of stator and rotor blades in the last stage of ultra-ultra-critical steam turbine with extra-long blade of 1200mm. The influences of attack angle and Mach number on the aerodynamic performances of these sections of the blade profiles were verified, and their operating ranges were also specified.展开更多
Objective:To evaluate the efficacy of paclitaxel-coated balloon(PCB)in the treatment of extra-long femoropopliteal artery atherosclerotic disease(>30 cm).Materials and methods:Forty-nine patients with extra-long fe...Objective:To evaluate the efficacy of paclitaxel-coated balloon(PCB)in the treatment of extra-long femoropopliteal artery atherosclerotic disease(>30 cm).Materials and methods:Forty-nine patients with extra-long femoropopliteal artery atherosclerotic disease were treated with PCB alone in a single center from July 2016 to May 2018.Primary patency and freedom from clinically driven target lesion revascularization(FF-CDTLR)rates during 12 months were analyzed retrospectively.Results:All patients were followed up for 18.2±7.5 months,and the mean treated lesion length was 34.9±3.7 cm.The primary patency rates were 87.8%(43/49)and 71.4%(35/49)at 6 and 12 months,respectively.FFCDTLR was 91.8%(45/49)and 77.6%(38/49)at 6 and 12 months,respectively.No mortality or amputation occurred in these patients during the follow-up period.Conclusions:PCB has favorable clinical efficacy in patients with extra-long femoropopliteal artery atherosclerotic lesions.展开更多
基金Project(2018YFB2101000) supported by the National Key R&D Program of ChinaProject(20YF1451400) supported by Shanghai Sailing Program,ChinaProject(SLDRCE19-A-14) supported by the Research Fund of State Key Laboratory for Disaster Reduction in Civil Engineering,China。
文摘Long-time driving and monotonous visual environment increase the safety risk of driving in an extra-long tunnel.Driving fatigue can be effectively relieved by setting the visual fatigue relief zone in the tunnel.However,the setting form of visual fatigue relief zone,such as its length and location,is difficult to be designed and quantified.By integrating virtual reality(VR)apparatus with wearable electroencephalogram(EEG)-based devices,a hybrid method was proposed in this study to assist analyzers to formulate the layout of visual fatigue relief zone in the extra-long tunnel.The virtual environment of this study was based on an 11.5 km extra-long tunnel located in Yunnan Province in China.The results indicated that the use of natural landscape decoration inside the tunnel could improve driving fatigue with the growth rate of attention of the driver increased by more than 20%.The accumulation of driving fatigue had a negative effect on the fatigue relief.The results demonstrated that the optimal location of the fatigue relief zone was at the place where driving fatigue had just occurred rather than at the place where a certain amount of driving fatigue had accumulated.
文摘On super-sonic or trans-sonic planar cascade wind tunnel of free jet intermittent type, wind blowing experiments were performed on the typical sections of stator and rotor blades in the last stage of ultra-ultra-critical steam turbine with extra-long blade of 1200mm. The influences of attack angle and Mach number on the aerodynamic performances of these sections of the blade profiles were verified, and their operating ranges were also specified.
文摘Objective:To evaluate the efficacy of paclitaxel-coated balloon(PCB)in the treatment of extra-long femoropopliteal artery atherosclerotic disease(>30 cm).Materials and methods:Forty-nine patients with extra-long femoropopliteal artery atherosclerotic disease were treated with PCB alone in a single center from July 2016 to May 2018.Primary patency and freedom from clinically driven target lesion revascularization(FF-CDTLR)rates during 12 months were analyzed retrospectively.Results:All patients were followed up for 18.2±7.5 months,and the mean treated lesion length was 34.9±3.7 cm.The primary patency rates were 87.8%(43/49)and 71.4%(35/49)at 6 and 12 months,respectively.FFCDTLR was 91.8%(45/49)and 77.6%(38/49)at 6 and 12 months,respectively.No mortality or amputation occurred in these patients during the follow-up period.Conclusions:PCB has favorable clinical efficacy in patients with extra-long femoropopliteal artery atherosclerotic lesions.
