目的将Castor分支型覆膜支架应用于锚定区不足的B型主动脉夹层(type B aortic dissection,TBAD)治疗中,观察中短期治疗效果。方法锚定区不足的TBAD病人122例,均行Castor分支型覆膜支架治疗。评估术后2周、3个月、6个月、12个月支架通畅...目的将Castor分支型覆膜支架应用于锚定区不足的B型主动脉夹层(type B aortic dissection,TBAD)治疗中,观察中短期治疗效果。方法锚定区不足的TBAD病人122例,均行Castor分支型覆膜支架治疗。评估术后2周、3个月、6个月、12个月支架通畅率、主动脉重塑情况、并发症发生率。结果术后2周、3个月、6个月、1年左锁骨下动脉(LSA)分支支架通畅率分别为100%、100%、99.18%和97.54%。术后2周主动脉重塑指标得到改善,随着术后时间的延长,主动脉重塑指标改善程度逐渐提高,与术后2周比较差异有统计学意义(P<0.05)。术后发生3例内漏、1例脑梗死、1例难治性高血压;随访过程中2例内漏消失,出现1例逆行性A型夹层。结论Castor分支型覆膜支架治疗锚定区不足的TBAD临床效果佳,远期支架通畅率高,术后并发症少。展开更多
The FY-3 satellite is a second-generation Chinese polar-orbit meteorological satellite.The Solar Backscatter Ultraviolet Sounder (SBUS),one of the main payloads on the FY-3 satellite,is the first Chinese ozone-monitor...The FY-3 satellite is a second-generation Chinese polar-orbit meteorological satellite.The Solar Backscatter Ultraviolet Sounder (SBUS),one of the main payloads on the FY-3 satellite,is the first Chinese ozone-monitoring instrument on a meteorological satellite.As part of the in-orbit validation of FY-3,we carried out a retrieval trial using measurements from SBUS during the period of 17-30 July,2008,and compared those data with measurements and retrieved profiles from the National Oceanic and Atmospheric Administration (NOAA) satellite SBUV/2.The results show that the precision of the measurements and retrieved profiles are quite good.The averaged relative difference percentages of the ozone profiles retrieved from SBUS and those from SBUV/2 are within ±7%.展开更多
Dispersive Alfvén waves(DAWs)have been demonstrated to play a significant role in auroral generation of the magnetosphereionosphere coupling system.Starting from a two fluid reduced MHD model,we summarize the fre...Dispersive Alfvén waves(DAWs)have been demonstrated to play a significant role in auroral generation of the magnetosphereionosphere coupling system.Starting from a two fluid reduced MHD model,we summarize the frequency,temporal and spatial characteristics of magnetospheric DAWs.Then,the nonlinear kinetic and inertial scale Alfveén waves are studied,and we review some theoretical aspects and simulation results of dispersive Alfve′n waves in Earth's magnetosphere.It is shown that dispersive standing Alfve′n waves can generate the field-aligned currents which transport energy into the auroral ionosphere,where it is dissipated by Joule heating and energy lost due to electron precipitation.The Joule dissipation can heat the ionospheric electron and produce changes in the ionospheric Pedersen conductivity.As a feedback,the conducting ionosphere can also strongly affect the magnetospheric currents. The ponderomotive force can cause the plasma to move along the field line,and generate ionospheric density cavity.The nonlinear structuring can lead to a dispersive scale to accelerate auroral particle,and the Alfvn waves can be trapped within the density cavity. Finally,we show the nonlinear decay of dispersive Alfvén waves related to two anti-propagating electron fluxes observed in the auroral zone.展开更多
文摘目的将Castor分支型覆膜支架应用于锚定区不足的B型主动脉夹层(type B aortic dissection,TBAD)治疗中,观察中短期治疗效果。方法锚定区不足的TBAD病人122例,均行Castor分支型覆膜支架治疗。评估术后2周、3个月、6个月、12个月支架通畅率、主动脉重塑情况、并发症发生率。结果术后2周、3个月、6个月、1年左锁骨下动脉(LSA)分支支架通畅率分别为100%、100%、99.18%和97.54%。术后2周主动脉重塑指标得到改善,随着术后时间的延长,主动脉重塑指标改善程度逐渐提高,与术后2周比较差异有统计学意义(P<0.05)。术后发生3例内漏、1例脑梗死、1例难治性高血压;随访过程中2例内漏消失,出现1例逆行性A型夹层。结论Castor分支型覆膜支架治疗锚定区不足的TBAD临床效果佳,远期支架通畅率高,术后并发症少。
基金supported by the National Natural Science Foundation of China (Grant No.40775024)National Basic Research Program of China (Grant No.2005CB422202)the 2nd ESA-MOST "Drag-Star" Program (Grant No.5253)
文摘The FY-3 satellite is a second-generation Chinese polar-orbit meteorological satellite.The Solar Backscatter Ultraviolet Sounder (SBUS),one of the main payloads on the FY-3 satellite,is the first Chinese ozone-monitoring instrument on a meteorological satellite.As part of the in-orbit validation of FY-3,we carried out a retrieval trial using measurements from SBUS during the period of 17-30 July,2008,and compared those data with measurements and retrieved profiles from the National Oceanic and Atmospheric Administration (NOAA) satellite SBUV/2.The results show that the precision of the measurements and retrieved profiles are quite good.The averaged relative difference percentages of the ozone profiles retrieved from SBUS and those from SBUV/2 are within ±7%.
基金supported by the National Natural Science Foundation of China(40874087 and 41031063)the China Meteorological Administration(GYHY201106011)the China Public Science and Technology Research Funds Projects of Ocean(201005017)
文摘Dispersive Alfvén waves(DAWs)have been demonstrated to play a significant role in auroral generation of the magnetosphereionosphere coupling system.Starting from a two fluid reduced MHD model,we summarize the frequency,temporal and spatial characteristics of magnetospheric DAWs.Then,the nonlinear kinetic and inertial scale Alfveén waves are studied,and we review some theoretical aspects and simulation results of dispersive Alfve′n waves in Earth's magnetosphere.It is shown that dispersive standing Alfve′n waves can generate the field-aligned currents which transport energy into the auroral ionosphere,where it is dissipated by Joule heating and energy lost due to electron precipitation.The Joule dissipation can heat the ionospheric electron and produce changes in the ionospheric Pedersen conductivity.As a feedback,the conducting ionosphere can also strongly affect the magnetospheric currents. The ponderomotive force can cause the plasma to move along the field line,and generate ionospheric density cavity.The nonlinear structuring can lead to a dispersive scale to accelerate auroral particle,and the Alfvn waves can be trapped within the density cavity. Finally,we show the nonlinear decay of dispersive Alfvén waves related to two anti-propagating electron fluxes observed in the auroral zone.
