超声乳化联合前段玻璃体切割治疗白内障晶体半脱位

目的:探讨超声乳化联合前段玻璃体切割囊袋内人工晶体植入治疗白内障晶体半脱位临床疗效及可行性.方法:选取因外伤伴有晶状体半脱位的白内障患者36例(36只眼).患者首先做常规白内障透明角膜切口,撕囊、水分离、超声乳化晶状体吸出,同时切除溢出到前房的玻璃体,囊袋内植入人工晶体.结果:36例(36只眼)患者均顺利摘除浑浊的晶状体,成功地保留了后囊膜,并在囊袋内植入了人工晶体,28例患者人工晶体位置较正,8例略向下移位.术后视力0.1~0.5者24例;0.5~1.0者11例;1例失明(均随访半年).结论:超声乳化吸出联合前段玻璃体切割囊袋内人工晶体植入手术治疗晶状体半脱位的白内障是一种安全、有效的手术方式.     

囊袋张力环在治疗晶状体半脱位术中的应用

评价晶体半脱位患者囊袋植入张力环后进行囊袋内超声乳化白内障吸除术的应用价值.对15例晶状体半脱位(脱位范围1/4～3/4象限)或合并白内障的患者行超声乳化白内障吸除术,术中环形撕囊后,对脱位范围＜1/2象限者,将囊袋张力环(CTR)送入晶状体囊袋内;对脱位范围＞1/2象限者,将可缝合囊袋张力环(MCTR)用缝线固定在悬...     

白内障超声乳化和折叠人工晶体植入125例临床分析

目的探讨囊膜上超声乳化、机械劈核和人工晶体植入术治疗白内障的疗效.方法采用10点半处透明角膜隧道切口,对125例白内障患者行超声乳化摘出、折叠人工晶体植入术.结果术后第一天、一周裸眼视力≥0.5者分别为60%、89.6%,术后3个月以上裸眼视力为≥1.0占76%术后三个月平均散光为0.78±0.66D.结论透明角膜隧道切口,高负压低能量白内障超声乳化具有术后早期视力恢复快,切口自闭好,屈光状态稳定,并发症少等优点,是值得推广的手术方法.     

白内障超声乳化术与折叠式人工晶状体植入术460例分析

目的 :总结透明角膜切口的超声乳化与折叠式人工晶状体植入手术治疗白内障的手术方法及临床疗效。方法 :在表面麻醉下以透明角膜切口对 4 60例 (5 82只眼 )白内障患者施行超声乳化摘除术 ,并植入折叠式人工晶状体。结果 :术后 3h及 1d裸眼或球镜矫正视力≥ 0 .5者占 87%、90 .9% ;术后 1周及 1个月视力≥ 1.0者占 2 9%、31%。术前无散光而术后出现散光的 31例 ,但均在+ 1.0D以下。结论 :透明角膜切口的超声乳化与折叠式人工晶状体植入术具有手术切口小、安全可靠、手术时间短、术后视力恢复快且稳定的优点。     

人工晶状体材料与人工晶状体植入术并发症及不良事件

近年来,随着眼科显微技术的发展和超声乳化白内障摘除人工晶体植入的广泛应用,许许多多白内障患者恢复了有用视力.然而,在广泛开展超声乳化白内障摘除人工晶体植入的同时,个别地方也零星出现超声乳化白内障摘除人工晶状体植入及其材料的并发症和不良事件甚至严重不良事件的报道,引起社会和卫生部门的极大关注.如何规范白内障手术医生的诊疗行为,如何提高白内障超声乳化摘除人工晶体植入的安全性和有效性及白内障摘除人工晶状体植入及其材料的并发症和不良事件的监测与术后随访也日趋倍受关注.本文就人工晶状体材料与人工晶状体植入术并发症及不良事件进行探讨.     

高度近视并发白内障超声乳化摘除术及临床观察

对29例(33只眼)高度近视并发白内障患者施行超声乳化白内障摘除术并同时植入低、负度数人工晶状体,术后平均随访(5.1±0.8)月.术后矫正视力≥0.3～0.4,8只眼(24%);≥0.5～0.6;18只眼(55%);≥0.7,7只眼(21%).临床观察结果表明,高度近视并发白　　　　　　　内障时,选择超声乳化白内障摘除联合低、负度数人工晶状体植入术,手术效果令人满意.     

硅油并发性及年龄相关性白内障行超声乳化联合人工晶体植入术后临床观察

观察两种白内障术后的屈光状态及并发症情况。前瞻性随机选取硅油并发性白内障患者28例28眼作为研究组,同期年龄相关性白内障患者28例28眼作为对照组。比较两组术后3个月的内皮细胞损失率(ECL)、术前IOL-Master测得人工晶体植入后的预估屈光度数(EDR)与术后3个月电脑验光所测实际等效球镜度数(SE)及术后并发症发生情况。研究组内皮细胞损失率为9.37±1.80%,与对照组(10.91±1.32%)相比差异无统计学意义(χ2=3.175,P=0.075)。研究组术前EDR为-0.61±0.73D,术后3个月ESD为-0.60±0.84D;对照组分别为-0.50±0.90D、-0.60±1.02D,两组术前与术后比较差异均无统计学意义(Z=-0.319, P=0.75;Z=-0.558,P=0.58)。研究组后发性白内障发生率(11.8%)高于对照组(2.5%),差异具有统计学意义(χ2=4.139, P=0.049)。所有患者均无持续性角膜内皮失代偿、硅油泡残留、人工晶状体移位和玻璃体出血等严重并发症发生。硅油取出联合白内障超声乳化手术角膜内皮细胞损失率与单纯白内障超声乳化术无明显差别。使用IOL-Master测量人工晶体度数对于硅油填充眼是准确并适用的。硅油取出联合白内障超声乳化手术术后后发性白内障发生率更高。     

白内障超声乳化术与折叠式人工晶体状体植入术460例分析

目的：总结透明角膜切口的超声乳化与折叠式人工晶状体植入手术治疗白内障的手术方法及临床疗效。方法：在表面麻醉下以透明角膜切口对460例（582只眼）白内障患者施行超声乳化摘除术,并植入折叠式人工晶状体。结果：术后3h及1d裸眼或球镜矫正视力≥0．5者占87％、90．9％;术后1周及1个月视力≥1．0者占29％、31％。术前无散光而术后出现散光的31例,但均在＋1．0D以下。结论：透明角膜切口的超声乳化与折叠式人工晶状体植入术具有手术切口小、安全可靠、手术时间短、术后视力恢复快且稳定的优点。     

小切口非乳化白内障囊外摘除术的探讨

目的:探讨小切口非乳化白内障囊外摘出联合人工晶状体植入术的效果。方法:对136例(162眼)白内障患者施行小切口非超声乳化白内障囊外摘出人工晶状体植入手术。结果:术后最佳矫正视力≥1.O者21眼(12.9%),≥0.5者117眼(72.3%)。术后散光轻,伤口愈合快,并发症少。结论:该术式具有切口小、愈合快、术后散光小、视力恢复快及操作简单、无需特殊设备之优点。     

高龄白内障患者超声乳化摘除及人工晶体植入术的临床观察

采用超声乳化白内障摘除及人工晶体植入术对 80岁以上高龄白内障患者 82例 ,88眼进行手术 .结果表明 :手术后第 1d出现角膜内皮线状混浊 2 2眼 ,占 2 5 % ,其中 18例为Ⅲ级核以上者 ,占角膜内皮线状混浊的 81.82 % ,前房有不同程度混浊 ,均于术后 3～ 5d消失 ;术后3d裸眼视力≥ 0 .5者为 34眼 ,占 38.6 4 % ,1周者为 4 8眼 ,占 5 4 .5 5 % ,1个月者为 6 1眼 ,占 6 9.32 % .高龄白内障患者进行超声乳化摘除及人工晶体植入术是适宜的 ;手术后反应与其他年龄组相似 ;手术后视力与眼底情况密切相关 ;表面麻醉或球周麻醉下进行手术是安全的     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to