Aortopuhnonary window is a rare congenital cardiac malformation, which is previously repaired using cardiopulmonary bypass. However, some cases were reported to repair the aortopulmonary septal defect by transcathetcr...Aortopuhnonary window is a rare congenital cardiac malformation, which is previously repaired using cardiopulmonary bypass. However, some cases were reported to repair the aortopulmonary septal defect by transcathetcr closure. Here we present a 30 year-old woman with a 7-mm aortopulmonary window, who was successfully treated using a modified double-disk PmVSD occluder展开更多
Computational fluid dynamics(CFD) has recently emerged as an effective tool for the investigation of the hydraulic parameters and efficiency of tray towers.The computation domain was established for two types of orien...Computational fluid dynamics(CFD) has recently emerged as an effective tool for the investigation of the hydraulic parameters and efficiency of tray towers.The computation domain was established for two types of oriented valves within a tray and meshed into two parts with different grid types and sizes.The volume fraction correlation concerning inter-phase momentum transfer source was fitted based on experimental data,and built in UDF for simulation.The flow pattern of oriented valve tray under different operating conditions was simulated under Eulerian-Eulerian framework with realizable k-ε model.The predicted liquid height from CFD simulation was in good agreement with the results of pressure drop and volume fraction correlations.Meanwhile,the velocity distribution and volume fraction of the two phases were demonstrated and analyzed,which are useful in design and analysis of the column trays.展开更多
文摘本文针对用于工业控制的 IBM-PC 及其兼容机软盘驱动系统故障率较高这一突出问题,采用半导体存储器件研制了一块适合 IBM-PC 及其兼容机的半导体盘扩展板。该板除具有工作可靠、抗尘抗震性强、存取速度快、性能价格比高等特点外,不需改变 PC 机任何软硬件即可取代原软驱系统,完成程序的储存和系统自举,有效地提高了 PC 机在工业应用中的可靠性。
文摘Aortopuhnonary window is a rare congenital cardiac malformation, which is previously repaired using cardiopulmonary bypass. However, some cases were reported to repair the aortopulmonary septal defect by transcathetcr closure. Here we present a 30 year-old woman with a 7-mm aortopulmonary window, who was successfully treated using a modified double-disk PmVSD occluder
文摘Computational fluid dynamics(CFD) has recently emerged as an effective tool for the investigation of the hydraulic parameters and efficiency of tray towers.The computation domain was established for two types of oriented valves within a tray and meshed into two parts with different grid types and sizes.The volume fraction correlation concerning inter-phase momentum transfer source was fitted based on experimental data,and built in UDF for simulation.The flow pattern of oriented valve tray under different operating conditions was simulated under Eulerian-Eulerian framework with realizable k-ε model.The predicted liquid height from CFD simulation was in good agreement with the results of pressure drop and volume fraction correlations.Meanwhile,the velocity distribution and volume fraction of the two phases were demonstrated and analyzed,which are useful in design and analysis of the column trays.
