目的:观察区域折射型多焦点人工晶状体(MIOL)SBL-3植入术后视觉质量。方法:回顾性对照研究南昌大学第二附属医院2019-09/2020-07收治的57例68眼白内障患者。其中植入区域折射型MIOL SBL-3者33例36眼(SBL-3组),植入非球面单焦点人工晶状...目的:观察区域折射型多焦点人工晶状体(MIOL)SBL-3植入术后视觉质量。方法:回顾性对照研究南昌大学第二附属医院2019-09/2020-07收治的57例68眼白内障患者。其中植入区域折射型MIOL SBL-3者33例36眼(SBL-3组),植入非球面单焦点人工晶状体(SIOL)ZCB00者24例32眼(ZCB00组),对比两组术后3mo裸眼和矫正远、中、近视力、离焦曲线、OPDIII客观视觉质量、QoV问卷调查、患者满意度及术后脱镜率。结果:术后3mo SBL-3组和ZCB00组裸眼和矫正远视力LogMAR值(0.13±0.09 vs 0.10±0.08,0.06±0.06 vs 0.08±0.08,均P>0.05)无显著差异,裸眼远视力均较术前有显著改善(P<0.05)。SBL-3组裸眼及最佳矫正远视力下的中、近视力明显优于ZCB00组(0.10±0.14 vs 0.27±0.10,0.05±0.16 vs 0.35±0.17,0.11±0.14 vs 0.26±0.11,0.03±0.17 vs 0.35±0.17,均P<0.05)。在所评估的各个空间频率上患者对比敏感度的比较中ZCB00组均优于SBL-3组(P<0.05)。SBL-3组总像差、总高阶像差、彗差、三叶草差均大于ZCB00组且有显著差异(P<0.05),SBL-3组平均SR值小于ZCB00组(P<0.05)。术后3mo SBL-3组出现眩光1例,光晕1例,视远模糊4例。SBL-3组和ZCB00组患者表示非常满意者分别占82%、88%。两组间满意度比较无显著差异(P>0.05),脱镜率(94%vs 67%)比较有显著差异(P<0.05),且SBL-3组脱镜率更高。结论:新型区域折射型MIOL SBL-3提供了良好的全程视力,术后不良视觉症状少,满意度和脱镜率高。展开更多
The marginal sea and back-arc basins in the Western Pacific Ocean have become the focus of tectonics due to their unique tectonic location.To understand the deep crustal structure in the back-arc region,we present a 5...The marginal sea and back-arc basins in the Western Pacific Ocean have become the focus of tectonics due to their unique tectonic location.To understand the deep crustal structure in the back-arc region,we present a 545-kmlong active-source ocean bottom seismometer(OBS)wide-angle reflection/refraction profile in the East China Sea.The P wave velocity model shows that the Moho depth rises significantly,from approximately 30 km in the East China Sea shelf to approximately 16 km in the axis of the Okinawa Trough.The lower crustal high-velocity zone(HVZ)in the southern Okinawa Trough,with V_(p) of 6.8-7.3 km/s,is a remarkable manifestation of the mantle material upwelling and accretion to the lower crust.This confirms that the lower crustal high-velocity mantle accretion is developed in the southern Okinawa Trough.During the process of back-arc extension,the crustal structure of the southern Okinawa Trough is completely invaded and penetrated by the upper mantle material in the axis region.In some areas of the southern central graben,the crust may has broken up and entered the initial stage of seafloor spreading.The discontinuous HVZs in the lower crust in the back-arc region also indicate the migration of spreading centers in the back-arc region since the Cenozoic.The asthenosphere material upwelling in the continent-ocean transition zone is constantly driving the lithosphere eastward for episodic extension,and is causing evident tectonic migration in the Western Pacific back-arc region.展开更多
The data obtained from a high resolution seismic refraction profile, which was carded out in Jiashi, Xinjiang, strong earthquake swarm area, were processed with both finite difference inversion and Hagedoorn refractor...The data obtained from a high resolution seismic refraction profile, which was carded out in Jiashi, Xinjiang, strong earthquake swarm area, were processed with both finite difference inversion and Hagedoorn refractor wavefront imaging technique and the fine upper crustal structure was determined. The results show that the upper crustal structure is relatively well-distributed in laterally and obviously by layers vertically.From surface to 11.0 km depth, there are about four layers. The P wave velocity of top two layers range from 1.65 to 4.5 km/s and their bottom boundaries, the buried depths of which are 0.4, 2.96-3.0 km respectively, are almost horizontal; The third layer is comparatively complicated and its P wave velocity presents inhomogeneous in both laterally and vertically. The bottom boundary of third layer is crystalline basement and shows a little uplift, which seemly suggest that the upper crust had been resisted while the hard Tarim block inserting into Tianshan Mountain; The forth layer is relatively even and its P wave velocity is about 6.3 km/s. There are a lateral velocity variation at the depth of about 4.0 km, and suggest that it has something to do with the hidden Meigaiti fault and Meigaiti-Xiasuhong fault but there are no the structure features about these faults stretching to the surface and passing through the crystalline basement. The seismogenic tectonic of Jiashi strong earthquake swarm at least lies in middle or lower crust beneath 11.0 km depth.展开更多
The fine structure of crust mantle transition zone in Yanqing Hailai(Yan Huai basin) basin has been analyzed and discussed by using the data of Yanqing Hailai deep seismic reflection profile and Beijing Huailai ...The fine structure of crust mantle transition zone in Yanqing Hailai(Yan Huai basin) basin has been analyzed and discussed by using the data of Yanqing Hailai deep seismic reflection profile and Beijing Huailai Fengzhen deep seismic sounding profile obtained respectively in 1992 and in 1993. The primary model is established based on CDP stacking profile. The phases of seismic refraction waves and wide angle reflection waves are analyzed, travel time inversion is carried out and 2 D ray tracing is computed. Synthetic seismograms are completed by using re flectivity method for waveform fitting of phases P M and P M′, they are reflection waves from both the upper and the lower boundaries of the crust mantle transition zone in this basin. The results show that the P M′ reflection waves are stronger at some points and come from the lower boundary of Moho discontinuity. It is confirmed and inter preted that the Moho discontinuity in Yanqing Hailai basin consists of a group of thin layers with alternatively higher and lower velocities.展开更多
文摘目的:观察区域折射型多焦点人工晶状体(MIOL)SBL-3植入术后视觉质量。方法:回顾性对照研究南昌大学第二附属医院2019-09/2020-07收治的57例68眼白内障患者。其中植入区域折射型MIOL SBL-3者33例36眼(SBL-3组),植入非球面单焦点人工晶状体(SIOL)ZCB00者24例32眼(ZCB00组),对比两组术后3mo裸眼和矫正远、中、近视力、离焦曲线、OPDIII客观视觉质量、QoV问卷调查、患者满意度及术后脱镜率。结果:术后3mo SBL-3组和ZCB00组裸眼和矫正远视力LogMAR值(0.13±0.09 vs 0.10±0.08,0.06±0.06 vs 0.08±0.08,均P>0.05)无显著差异,裸眼远视力均较术前有显著改善(P<0.05)。SBL-3组裸眼及最佳矫正远视力下的中、近视力明显优于ZCB00组(0.10±0.14 vs 0.27±0.10,0.05±0.16 vs 0.35±0.17,0.11±0.14 vs 0.26±0.11,0.03±0.17 vs 0.35±0.17,均P<0.05)。在所评估的各个空间频率上患者对比敏感度的比较中ZCB00组均优于SBL-3组(P<0.05)。SBL-3组总像差、总高阶像差、彗差、三叶草差均大于ZCB00组且有显著差异(P<0.05),SBL-3组平均SR值小于ZCB00组(P<0.05)。术后3mo SBL-3组出现眩光1例,光晕1例,视远模糊4例。SBL-3组和ZCB00组患者表示非常满意者分别占82%、88%。两组间满意度比较无显著差异(P>0.05),脱镜率(94%vs 67%)比较有显著差异(P<0.05),且SBL-3组脱镜率更高。结论:新型区域折射型MIOL SBL-3提供了良好的全程视力,术后不良视觉症状少,满意度和脱镜率高。
基金supported by the National Key Basic Research Program of China(Grant No.2013CB429701)the National Natural Science Foundation of China(Grant Nos.41606083,91958210,41606050 and 41210005)+1 种基金AoShan Technological Innovation Projects of National Laboratory for Marine Science and Technology(Qingdao)(2015ASKJ03)National Marine Geological Special Project(DD20190236,DD20190365,DD20190377)。
文摘The marginal sea and back-arc basins in the Western Pacific Ocean have become the focus of tectonics due to their unique tectonic location.To understand the deep crustal structure in the back-arc region,we present a 545-kmlong active-source ocean bottom seismometer(OBS)wide-angle reflection/refraction profile in the East China Sea.The P wave velocity model shows that the Moho depth rises significantly,from approximately 30 km in the East China Sea shelf to approximately 16 km in the axis of the Okinawa Trough.The lower crustal high-velocity zone(HVZ)in the southern Okinawa Trough,with V_(p) of 6.8-7.3 km/s,is a remarkable manifestation of the mantle material upwelling and accretion to the lower crust.This confirms that the lower crustal high-velocity mantle accretion is developed in the southern Okinawa Trough.During the process of back-arc extension,the crustal structure of the southern Okinawa Trough is completely invaded and penetrated by the upper mantle material in the axis region.In some areas of the southern central graben,the crust may has broken up and entered the initial stage of seafloor spreading.The discontinuous HVZs in the lower crust in the back-arc region also indicate the migration of spreading centers in the back-arc region since the Cenozoic.The asthenosphere material upwelling in the continent-ocean transition zone is constantly driving the lithosphere eastward for episodic extension,and is causing evident tectonic migration in the Western Pacific back-arc region.
基金National Natural Science Foundation of China (40334040) and Joint Seismological Foundation (106076).
文摘The data obtained from a high resolution seismic refraction profile, which was carded out in Jiashi, Xinjiang, strong earthquake swarm area, were processed with both finite difference inversion and Hagedoorn refractor wavefront imaging technique and the fine upper crustal structure was determined. The results show that the upper crustal structure is relatively well-distributed in laterally and obviously by layers vertically.From surface to 11.0 km depth, there are about four layers. The P wave velocity of top two layers range from 1.65 to 4.5 km/s and their bottom boundaries, the buried depths of which are 0.4, 2.96-3.0 km respectively, are almost horizontal; The third layer is comparatively complicated and its P wave velocity presents inhomogeneous in both laterally and vertically. The bottom boundary of third layer is crystalline basement and shows a little uplift, which seemly suggest that the upper crust had been resisted while the hard Tarim block inserting into Tianshan Mountain; The forth layer is relatively even and its P wave velocity is about 6.3 km/s. There are a lateral velocity variation at the depth of about 4.0 km, and suggest that it has something to do with the hidden Meigaiti fault and Meigaiti-Xiasuhong fault but there are no the structure features about these faults stretching to the surface and passing through the crystalline basement. The seismogenic tectonic of Jiashi strong earthquake swarm at least lies in middle or lower crust beneath 11.0 km depth.
文摘The fine structure of crust mantle transition zone in Yanqing Hailai(Yan Huai basin) basin has been analyzed and discussed by using the data of Yanqing Hailai deep seismic reflection profile and Beijing Huailai Fengzhen deep seismic sounding profile obtained respectively in 1992 and in 1993. The primary model is established based on CDP stacking profile. The phases of seismic refraction waves and wide angle reflection waves are analyzed, travel time inversion is carried out and 2 D ray tracing is computed. Synthetic seismograms are completed by using re flectivity method for waveform fitting of phases P M and P M′, they are reflection waves from both the upper and the lower boundaries of the crust mantle transition zone in this basin. The results show that the P M′ reflection waves are stronger at some points and come from the lower boundary of Moho discontinuity. It is confirmed and inter preted that the Moho discontinuity in Yanqing Hailai basin consists of a group of thin layers with alternatively higher and lower velocities.
