目的用足部空间姿态评估分析系统(Sennotech Insole X 1.0)测量关节镜下前交叉韧带(ACL)重建手术前后患肢步态参数,并与正常人步态参数进行比较,评估ACL重建患者步态变化特点。方法纳入自2017-01—2017-08诊治的28例ACL损伤,均在关节镜...目的用足部空间姿态评估分析系统(Sennotech Insole X 1.0)测量关节镜下前交叉韧带(ACL)重建手术前后患肢步态参数,并与正常人步态参数进行比较,评估ACL重建患者步态变化特点。方法纳入自2017-01—2017-08诊治的28例ACL损伤,均在关节镜下用自体半腱肌、股薄肌重建ACL,采用Sennotech Insole X 1.0系统对术前及术后3个月足底压力时相变化及参数进行测定(观察组)。纳入同期28名健康成人作为对照组并采集相应参数。结果观察组术后3个月患肢步幅、步高、着地冲击力、支撑相、着地期、平足期、着地仰角、离地仰角、最大摆动速度较术前明显增加,而蹬伸期、摆动相较术前明显降低,差异有统计学意义(P <0.05)。观察组术后3个月患肢步幅、步高、着地冲击力、支撑相、着地期、平足期、着地仰角、离地仰角、最大摆动速度、蹬伸期、摆动相与正常人差异无统计学意义(P>0.05)。结论足部空间姿态评估分析系统可以量化评价ACL重建手术前后患肢步态变化特点,进而制定更加合理、有效、针对性强的治疗计划,以帮助患者更好地恢复膝关节生理运动功能。展开更多
Foundation is considered as one of the main parts of any structure. The type of foundation used is highly dependent on the type and properties of soil. The design of foundations requires many factors that should be de...Foundation is considered as one of the main parts of any structure. The type of foundation used is highly dependent on the type and properties of soil. The design of foundations requires many factors that should be defined. There are number of differences in the geological and soil conditions in Iraq. As a consequence, these differences are reflected on the type of foundation to be used. Despite these differences, same materials and style of buildings are used all over Iraq. The main problems of Iraqi soil are high gypsum content, salinity and shallow water table depth. These factors that influence the foundations are the soil properties and the amount of loads that transmitted by the superstructure. The situation has been analysed through a case study which illustrated the link between soil and foundation types in three different parts of Iraq （Mosul, Baghdad and Basra）. One building was analysed using ＂STAAD （structural analysis and design）. Pro＂ software in these regions. It is evident that Iraqi designers and engineers require local code to define all the loads, materials and design of the foundation to be used. The use of local materials might be very effective from both engineering and economic perspectives.展开更多
Using an improved FVCOM numerical model, combined with the momentum-sinking scheme based on the structural characteristics of specific turbines, this study analyzed the temporal and spatial distributions of tidal ener...Using an improved FVCOM numerical model, combined with the momentum-sinking scheme based on the structural characteristics of specific turbines, this study analyzed the temporal and spatial distributions of tidal energy resources before and after the deployment of tidal turbines near Pingtan Island, China. Considering factors such as the distribution of tidal stream energy, bathymetry, topography, and the design parameters of the turbines, an appropriate location for a demonstration tidal turbine was selected and the corresponding energy resource was evaluated. Several sites with strong tidal streams were considered： south of the northern cape, east of the southem cape, and the southern end of Haitan Bay. The former was thought most suitable for the deployment of a tidal energy turbine, with projected power generation for approximately 470 h per month. The average power of this demonstration was about 2.4 kW, and the annual electricity output was approximately 17.47 MWh. The intervention of the turbine device had little influence on the near-field tidal stream or water level. The tidal stream was reduced slightly in the area south of the northern cape, although the effect weakened further from the turbine. Conversely, the velocity increased slightly on both sides of the demonstration site. The difference in current speed with and without the turbine was greater at slack tide than still tide. The influence of turbine operation on water level was minor. The method adopted in this study can be considered a reference for the selection of sites for the demonstration of tidal stream energy. However, the method is unable describe the dynamic characteristics of the turbulent flow surrounding the deployed turbines, which has an important role regarding the optimal designs of the turbine blade and pile foundations. Therefore, we will continue to work to improve this model in future research.展开更多
文摘目的用足部空间姿态评估分析系统(Sennotech Insole X 1.0)测量关节镜下前交叉韧带(ACL)重建手术前后患肢步态参数,并与正常人步态参数进行比较,评估ACL重建患者步态变化特点。方法纳入自2017-01—2017-08诊治的28例ACL损伤,均在关节镜下用自体半腱肌、股薄肌重建ACL,采用Sennotech Insole X 1.0系统对术前及术后3个月足底压力时相变化及参数进行测定(观察组)。纳入同期28名健康成人作为对照组并采集相应参数。结果观察组术后3个月患肢步幅、步高、着地冲击力、支撑相、着地期、平足期、着地仰角、离地仰角、最大摆动速度较术前明显增加,而蹬伸期、摆动相较术前明显降低,差异有统计学意义(P <0.05)。观察组术后3个月患肢步幅、步高、着地冲击力、支撑相、着地期、平足期、着地仰角、离地仰角、最大摆动速度、蹬伸期、摆动相与正常人差异无统计学意义(P>0.05)。结论足部空间姿态评估分析系统可以量化评价ACL重建手术前后患肢步态变化特点,进而制定更加合理、有效、针对性强的治疗计划,以帮助患者更好地恢复膝关节生理运动功能。
文摘Foundation is considered as one of the main parts of any structure. The type of foundation used is highly dependent on the type and properties of soil. The design of foundations requires many factors that should be defined. There are number of differences in the geological and soil conditions in Iraq. As a consequence, these differences are reflected on the type of foundation to be used. Despite these differences, same materials and style of buildings are used all over Iraq. The main problems of Iraqi soil are high gypsum content, salinity and shallow water table depth. These factors that influence the foundations are the soil properties and the amount of loads that transmitted by the superstructure. The situation has been analysed through a case study which illustrated the link between soil and foundation types in three different parts of Iraq （Mosul, Baghdad and Basra）. One building was analysed using ＂STAAD （structural analysis and design）. Pro＂ software in these regions. It is evident that Iraqi designers and engineers require local code to define all the loads, materials and design of the foundation to be used. The use of local materials might be very effective from both engineering and economic perspectives.
基金Supported by the Chinese Marine Renewable Energy Special Fund(Nos.GHME2012ZC05,GHME2013GC03,GHME2013ZC01,GHME2014ZC01)
文摘Using an improved FVCOM numerical model, combined with the momentum-sinking scheme based on the structural characteristics of specific turbines, this study analyzed the temporal and spatial distributions of tidal energy resources before and after the deployment of tidal turbines near Pingtan Island, China. Considering factors such as the distribution of tidal stream energy, bathymetry, topography, and the design parameters of the turbines, an appropriate location for a demonstration tidal turbine was selected and the corresponding energy resource was evaluated. Several sites with strong tidal streams were considered： south of the northern cape, east of the southem cape, and the southern end of Haitan Bay. The former was thought most suitable for the deployment of a tidal energy turbine, with projected power generation for approximately 470 h per month. The average power of this demonstration was about 2.4 kW, and the annual electricity output was approximately 17.47 MWh. The intervention of the turbine device had little influence on the near-field tidal stream or water level. The tidal stream was reduced slightly in the area south of the northern cape, although the effect weakened further from the turbine. Conversely, the velocity increased slightly on both sides of the demonstration site. The difference in current speed with and without the turbine was greater at slack tide than still tide. The influence of turbine operation on water level was minor. The method adopted in this study can be considered a reference for the selection of sites for the demonstration of tidal stream energy. However, the method is unable describe the dynamic characteristics of the turbulent flow surrounding the deployed turbines, which has an important role regarding the optimal designs of the turbine blade and pile foundations. Therefore, we will continue to work to improve this model in future research.
