目的:探讨一款便携式柔性手部康复机器人在脑卒中患者临床与居家上肢康复中的可用性。方法:招募13例脑卒中偏瘫患者进行手部康复机器的可用性测试。患者首先在医院接受为期2周的学习与训练,随后将设备带回家进行为期6周的居家自主康复训...目的:探讨一款便携式柔性手部康复机器人在脑卒中患者临床与居家上肢康复中的可用性。方法:招募13例脑卒中偏瘫患者进行手部康复机器的可用性测试。患者首先在医院接受为期2周的学习与训练,随后将设备带回家进行为期6周的居家自主康复训练,每次33 min,每天2次。训练结束后采用系统可用性量表(system usability scale,SUS)及半结构式访谈评估机器的可用性。此外,在干预前后及训练期间通过Fugl-Meyer运动功能量表上肢部分(Fugl-Meyer assessment upper extremity,FMA-UE)、行动研究手臂测试(action research arm test,ARAT)、日常生活活动量表(activities of daily living,ADL)评估患者的上肢运动功能和日常生活自理能力。结果:13例患者SUS为(85.8±10.5)分,处于“Excellent”水平。半结构式访谈结果显示,该设备操作简便、便于携带,但在连接、硬件稳定性及训练内容丰富度等方面仍有改进空间。干预结束后,部分患者FMA-UE、ARAT、ADL评分较前有所改善,达到最小临床重要差异(mini clinical important difference,MCID)。结论:柔性手部康复机器人在脑卒中偏瘫患者的临床及居家康复中具有良好的可用性和安全性,可作为脑卒中手部康复的一种潜在有效手段。展开更多
To mitigate the impact of interdiffusion reactions between the silicide slurry and Ta12W alloy substrate during vacuum sintering process on the oxidation resistance of the silicide coating,a micro-arc oxidation pretre...To mitigate the impact of interdiffusion reactions between the silicide slurry and Ta12W alloy substrate during vacuum sintering process on the oxidation resistance of the silicide coating,a micro-arc oxidation pretreatment was employed to construct a Ta_(2)O_(5)ceramic layer on the Ta12W alloy surface.Subsequently,a slurry spraying-vacuum sintering method was used to prepare a Si-Cr-Ti-Zr coating on the pretreated substrate.Comparative studies were conducted on the microstructure,phase composition,and isothermal oxidation resistance(at 1600℃)of the as-prepared coatings with and without the micro-arc oxidation ceramic layer.The results show that the Ta_(2)O_(5)layer prepared at 400 V is more continuous and has smaller pores than that prepared at 350 V.After microarc oxidation pretreatment,the Si-Cr-Ti-Zr coating on Ta12W alloy consists of three distinct layers:an upper layer dominated by Ti_(5)Si_(3),Ta_(5)Si_(3),and ZrSi;a middle layer dominated by TaSi_(2);a coating/substrate interfacial reaction layer dominated by Ta_(5)Si_(3).Both the Si-Cr-Ti-Zr coatings with and without the Ta_(2)O_(5)ceramic layer do not fail after isothermal oxidation at 1600℃for 5 h.Notably,the addition of the Ta2O5 ceramic layer reduces the high-temperature oxidation rate of the coating.展开更多
While the instantaneous power of triboelectric nanogenerators(TENGs)has significantly increased,the average power remains unsatisfactory.Achieving a continuous and stable output remains a significant challenge.Herein,...While the instantaneous power of triboelectric nanogenerators(TENGs)has significantly increased,the average power remains unsatisfactory.Achieving a continuous and stable output remains a significant challenge.Herein,a self-excited vibration TENG inspired by woodpeckers is proposed.This structure converts gravitational potential energy into the continuous vibration of a cantilever beam.A dynamic simulation model of the system is established,and the influence of different structural parameters on the motion characteristics and electrical performance is discussed.Meanwhile,the experimental results indicate that the accelerated motion(approximate free-fall motion)is transformed into approximately uniform velocity motion.For a 3 cm^(2) TENG,the instantaneous power density reaches 2.03 W m^(-2),and the average power is 127%higher than that of the conventional cantilever beam mode.The proposed self-excited vibration mechanism is a promising approach for enhancing the average power and operational duration of TENGs.It shows great potential in fluid energy harvesting.展开更多
The Wuwei Basin is one of the most important oil-and gas-bearing basins in the Meso-Cenozoic basin groups in the Lower Yangtze River region.It has great shale gas resource prospects.The formation mechanism of this bas...The Wuwei Basin is one of the most important oil-and gas-bearing basins in the Meso-Cenozoic basin groups in the Lower Yangtze River region.It has great shale gas resource prospects.The formation mechanism of this basin is poorly studied for lack of constraining data for deep structures.In this paper,a crustal electrical structure model of the Wuwei Basin and the adjacent areas is constructed based on the two-dimensional inversion of a magnetotelluric(MT)sounding profile achieved with the nonlinear conjugate gradient method.The results show that large-scale low-resistance bodies have developed in the underlying middle and lower crust of the Wuwei Basin,and are different from the uplifts on the two sides according to their high-resistance electrical characteristics.The electrical structure and regional geological and geophysical data suggest that the peak zone of the Chuzhou-Chaohu foreland fold-and-thrust belt is located on the east bank of the Yangtze River(Wuhu Section),which,together with the main thrust fault belt in the east,forms a typical thrust structure belt.An early Yanshanian sinistral strike-slip fault developed in the deep part of the Wuwei Basin,which may have controlled the formation and evolution of the basin,whereas the tectonic inversion of the early-developed thrust faults is relatively weak.These findings provide a geophysical basis for future studies of basin tectonic evolution and regional tectonic frameworks.展开更多
文摘目的:探讨一款便携式柔性手部康复机器人在脑卒中患者临床与居家上肢康复中的可用性。方法:招募13例脑卒中偏瘫患者进行手部康复机器的可用性测试。患者首先在医院接受为期2周的学习与训练,随后将设备带回家进行为期6周的居家自主康复训练,每次33 min,每天2次。训练结束后采用系统可用性量表(system usability scale,SUS)及半结构式访谈评估机器的可用性。此外,在干预前后及训练期间通过Fugl-Meyer运动功能量表上肢部分(Fugl-Meyer assessment upper extremity,FMA-UE)、行动研究手臂测试(action research arm test,ARAT)、日常生活活动量表(activities of daily living,ADL)评估患者的上肢运动功能和日常生活自理能力。结果:13例患者SUS为(85.8±10.5)分,处于“Excellent”水平。半结构式访谈结果显示,该设备操作简便、便于携带,但在连接、硬件稳定性及训练内容丰富度等方面仍有改进空间。干预结束后,部分患者FMA-UE、ARAT、ADL评分较前有所改善,达到最小临床重要差异(mini clinical important difference,MCID)。结论:柔性手部康复机器人在脑卒中偏瘫患者的临床及居家康复中具有良好的可用性和安全性,可作为脑卒中手部康复的一种潜在有效手段。
基金National Natural Science Foundation of China(52071274)Key Research and Development Projects of Shaanxi Province(2023-YBGY-442)Science and Technology Nova Project-Innovative Talent Promotion Program of Shaanxi Province(2020KJXX-062)。
文摘To mitigate the impact of interdiffusion reactions between the silicide slurry and Ta12W alloy substrate during vacuum sintering process on the oxidation resistance of the silicide coating,a micro-arc oxidation pretreatment was employed to construct a Ta_(2)O_(5)ceramic layer on the Ta12W alloy surface.Subsequently,a slurry spraying-vacuum sintering method was used to prepare a Si-Cr-Ti-Zr coating on the pretreated substrate.Comparative studies were conducted on the microstructure,phase composition,and isothermal oxidation resistance(at 1600℃)of the as-prepared coatings with and without the micro-arc oxidation ceramic layer.The results show that the Ta_(2)O_(5)layer prepared at 400 V is more continuous and has smaller pores than that prepared at 350 V.After microarc oxidation pretreatment,the Si-Cr-Ti-Zr coating on Ta12W alloy consists of three distinct layers:an upper layer dominated by Ti_(5)Si_(3),Ta_(5)Si_(3),and ZrSi;a middle layer dominated by TaSi_(2);a coating/substrate interfacial reaction layer dominated by Ta_(5)Si_(3).Both the Si-Cr-Ti-Zr coatings with and without the Ta_(2)O_(5)ceramic layer do not fail after isothermal oxidation at 1600℃for 5 h.Notably,the addition of the Ta2O5 ceramic layer reduces the high-temperature oxidation rate of the coating.
基金广东省钟南山医学基金会项目(ZNSX S-20240064)江苏省高等学校自然科学研究面上项目(24KJB350011)+3 种基金泰州市科技支撑计划(社会发展)自然科学基金项目(TS202402)江苏省青蓝工程项目江苏省大学生创新训练计划项目(202512917058T)泰州学院大学生创新训练计划项目(cx250129y and cx250130y)。
基金support from the National Science Fund for Distinguished Young Scholars of China(Grant No.62225308)the National Natural Science Foundation of China(Grant No.62473246).
文摘While the instantaneous power of triboelectric nanogenerators(TENGs)has significantly increased,the average power remains unsatisfactory.Achieving a continuous and stable output remains a significant challenge.Herein,a self-excited vibration TENG inspired by woodpeckers is proposed.This structure converts gravitational potential energy into the continuous vibration of a cantilever beam.A dynamic simulation model of the system is established,and the influence of different structural parameters on the motion characteristics and electrical performance is discussed.Meanwhile,the experimental results indicate that the accelerated motion(approximate free-fall motion)is transformed into approximately uniform velocity motion.For a 3 cm^(2) TENG,the instantaneous power density reaches 2.03 W m^(-2),and the average power is 127%higher than that of the conventional cantilever beam mode.The proposed self-excited vibration mechanism is a promising approach for enhancing the average power and operational duration of TENGs.It shows great potential in fluid energy harvesting.
基金jointly supported by China Geological Survey(Nos.DD20190030,DD20201164,DD20221638)China National Nonprofit Institute Research(Nos.JKYZD202329,AS2017Y05,JYYWF20180902).
文摘The Wuwei Basin is one of the most important oil-and gas-bearing basins in the Meso-Cenozoic basin groups in the Lower Yangtze River region.It has great shale gas resource prospects.The formation mechanism of this basin is poorly studied for lack of constraining data for deep structures.In this paper,a crustal electrical structure model of the Wuwei Basin and the adjacent areas is constructed based on the two-dimensional inversion of a magnetotelluric(MT)sounding profile achieved with the nonlinear conjugate gradient method.The results show that large-scale low-resistance bodies have developed in the underlying middle and lower crust of the Wuwei Basin,and are different from the uplifts on the two sides according to their high-resistance electrical characteristics.The electrical structure and regional geological and geophysical data suggest that the peak zone of the Chuzhou-Chaohu foreland fold-and-thrust belt is located on the east bank of the Yangtze River(Wuhu Section),which,together with the main thrust fault belt in the east,forms a typical thrust structure belt.An early Yanshanian sinistral strike-slip fault developed in the deep part of the Wuwei Basin,which may have controlled the formation and evolution of the basin,whereas the tectonic inversion of the early-developed thrust faults is relatively weak.These findings provide a geophysical basis for future studies of basin tectonic evolution and regional tectonic frameworks.
