颅内破裂动脉瘤的早期显微手术治疗

目的：总结颅内破裂动脉瘤早期显微手术治疗的临床经验.方法：30例颅内破裂动脉瘤病人均于早期在全麻下行显微镜下动脉瘤夹闭术.结果：随访1～6个月,恢复良好27例,轻残2例,死亡1例.结论：早期显微手术治疗颅内破裂动脉瘤,有利于降低动脉瘤再出血的危险性,并有利于脑血管痉挛的防治.     

颅内动脉瘤显微夹闭术35例的手术配合与护理

目的探讨脑动脉瘤患者实施外科治疗在显微镜下行颅内动脉瘤血管夹闭术的手术配合。方法对35例脑动脉瘤患者实施在显微镜下行颅内动脉瘤血管夹闭术术中的护理配合进行回顾性分析。结果35例患者手术过程顺利,术后均获得满意效果。结论认真做好术前准备,熟悉手术步骤、手术器械、手术显微镜的性能和用法及术中默契的配合是颅内动脉瘤血管夹闭术手术成功的关键。     

DSA在颅内动脉瘤和脑血管畸形诊疗中的临床应用

目的：探讨DSA（数字减影血管造影）在颅内动脉瘤和脑动静脉畸形诊断和治疗中的应用价值．方法：采用DSA脑血管造影检查疑似颅内动脉瘤和脑动静脉畸形的患者36例，根据造影结果决定下一步治疗方案．结果：共发现28例颅内动脉瘤和脑动静脉畸形，分别采用了血管内治疗、手术夹闭和切除等不同的治疗方案．结论：DSA极大提高了脑血管造影检查的准确性和可靠性，也为颅内动脉瘤和脑动静脉畸形的栓塞治疗、手术夹闭和切除提供了可靠保障．具有准确、安全和操作方便的特点，有很高的临床实用价值．     

神经内镜下前交通动脉瘤显微外科夹闭术

目的：探讨神经内镜辅助显微外科夹闭前交通动脉瘤的可行性及其意义．方法：回顾性分析内蒙古民族大学附属医院神经外科收治的23例前交通动脉瘤患者,根据术前诊断性影像资料,采用神经内镜辅助显微外科夹闭动脉瘤．结果：21例夹闭完全,2例与周围粘连紧密,采取包裹治疗．术后对病人随访6个月～2年,无再出血发生．结论：利用神经内镜不但可以帮助术者清晰地了解动脉瘤结构,还可以探查到瘤蒂具体位置以及动脉瘤后壁下隐藏的穿通支血管,从而减少了对周围脑组织、重要神经和血管的损伤,降低了手术后并发症的发生率,提高了手术疗效．     

蝶骨嵴内侧型脑膜瘤的显微手术治疗

目的：探讨蝶骨嵴内侧型脑膜瘤的手术方法．方法：通过收集2000-01～2008-06手术治疗的29例蝶骨嵴内侧型脑膜瘤患者．采用翼点为中心的颞额入路．对手术方法和效果进行分析总结．结果：全部病例均通过显微手术方法切除．全切除21例,次全切除8例．术后并发尿崩2例,经术后治疗,痊愈;动眼神经麻痹2例．经治疗,1例1个月后恢复,1例未恢复;视力恢复12例,好转7例,无恢复或加重2例．死亡1例,死亡原因为血管痉挛大面积脑梗塞．结论：通过显微手术治疗蝶骨嵴内侧型脑膜瘤,能够最大限度保护神经、血管及重要脑组织,提高肿瘤全切率及手术疗效．     

颅内破裂微小动脉瘤的血管内治疗临床研究

目的探讨颅内微小破裂动脉瘤血管内治疗的技术可行性和临床疗效。方法凹顾性分析我院2007年10月-2012年3月共收治的10例颅内微小动脉瘤性急性蛛网膜下腔出血患者行血管内治疗病例,其中颈内动脉床突上段动脉瘤1例,后交通动脉瘤4例,前交通动脉瘤2例,大脑中动脉瘤1例,椎动脉瘤1例,小脑后下动脉瘤1例;行单纯可脱性微弹簧圈动脉瘤囊内栓塞8例,对其中的宽颈动脉瘤辅以血管支架、球囊辅助的瘤颈成形技术完成治疗2例。结果9例行可脱性微弹簧圈动脉瘤囊内栓塞病例,达完全致密栓塞8例,1例患者瘤颈有很小的部分残留为95％栓塞,在随访期间保持稳定;其中1例置人支架的颈内动脉床突上段动脉瘤,术后半年复查,未发现支架移位;本组病例无1例死亡。结论血管内治疗颅内破裂微小动脉瘤是可行和有效的,是外科颅内动脉瘤夹闭术的…．种有效替代方法。     

经翼点入路显微手术切除蝶骨嵴脑膜瘤

目的:探讨经翼点入路显微手术切除蝶骨嵴脑膜瘤的方法及周围神经血管保护问题,提高蝶骨嵴脑膜瘤治疗效果。方法:采用显微神经外科技术,经常规翼点或扩大翼点入路,切除蝶骨嵴脑膜瘤。结果:按Simpson分级法评价肿瘤的切除程度:Ⅰ级切除5例,Ⅱ级切除5例,Ⅳ级切除4例。术后患者均每6个月进行随访,影像学提示未见肿瘤复发。结论:准确全面的术前评估、正确的手术方法、积极的术后治疗是提高蝶骨嵴脑膜瘤全切率、改善神经症状、减少术后并发症的关键。     

侧脑室肿瘤的手术治疗

目的：探讨侧脑室肿瘤性质与部位的关系、手术入路的选择及其并发症的防治。方法：３３例经ＣＴ确诊的侧脑室肿瘤ＭＲＩ检查６例，脑血管造影５例），采用显微外科手术治疗，手术入路包括经额中回、顶上小叶、颞中间和三角区。结果；肿瘤全切除１９例，次全切除１３例，部分切除１例。手术重残１例，死亡１例。１３例经２－９年随访，肿瘤无复发。结论：只有根据病灶大小和部位选择合适和路，才能避免不必要的神经功能缺失和达到病灶     

微弹簧圈血管内栓塞治疗48例颅内囊状动脉瘤

目的：介绍微弹簧圈血管内栓塞治疗48例颅内囊状动脉瘤．方法：所有病例均经股动脉穿刺插管选择性全脑血管造影确诊,在数字减影血管造影监视下行可脱性弹簧躅血管内栓塞治疗．结果：本组48例中无死亡病例,完全栓塞39例,不完全栓塞8例,未行治疗1例．结论：微弹簧圈血管内栓塞治疗颅内动脉瘤是可行的治疗方法．其效果确实,创伤小,病人恢复快．     

3D-CTA在颅内动脉瘤诊断与治疗中的应用

正探讨三维CT血管造影(3D-CTA)在颅内动脉瘤病因诊断和治疗中的临床价值。方法:对2010年9月至2013年10月就诊的75例自发性蛛网膜下腔出血患者先行头颅3D-CTA检查,3D-CTA诊断为动脉瘤的患者行动脉瘤夹闭术或介入栓塞术,3D-CTA诊断阴性的患者进一步行DSA检查。结果:75例患者中3D-CTA检出63例动脉瘤,后经介入栓塞或手术证实63例动脉瘤患者中61例为动脉瘤,     

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.     

A computer generator for randomly layered structures

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

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。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

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     

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

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.