馆藏数字资源聚合理论体系研究探赜

探赜馆藏数字资源聚合理论的目的在于,使其形成完整的理论体系,为聚合实践提供强有力的指导。在分析馆藏数字资源聚合概念内涵、概念理论分析框架、多学科视角下概念理论的基础上,认为馆藏数字资源聚合要以共享理论、集群理论、共生理论、长尾理论、认知语言学理论、评价学理论为基础引导,以网络分析方法理论、分众分类方法理论、计量学方法理论、本体方法理论、关联数据分析方法理论、共现分析方法理论为理论分析工具,融合关联数据发布理论、语义聚焦爬虫理论、网页抓取理论、索引理论、语义网理论、聚合机制理论的技术理论支撑,实现资源超网络语义模式、资源类型模式、资源作者合作模式、资源元数据互操作模式、资源选题模式等聚合模式理论的实践展现,凸显理论引进与本土化、理论新理念与研究新视觉、理论催生性与相关性发展的理论超越。     

IT外包决策理论综述

本文对IT外包（ITO）的决策理论进行的总结,其中包括外包权衡理论、外包选择理论、市场厚度理论、外包关系理论、定价理论和期间理论六个常用的决策理论,并且对未来的可能遇到的问题从客户和供应商两方面进行了剖析。     

试论拉康的主体建构理论及对霍米巴巴的影响

在拉康的精神分析理论中自我建构理论是最根本也是非常重要的理论,是以他的镜像阶段理论、象征界理论、语言结构理论和欲望理论等组成的。拉康的关于自我建构的理论对后殖民批评家霍米巴巴产生了非常重要的影响。     

六解"木桶理论"与高职院校的管理

本文把传统的木桶理论分解为六大子理论,即:短板理论、长板理论、桶底理论、桶形理论、桶箍理论和装水理论,并这从六大方面解读了木桶理论与高职院校管理的关系.     

善观察是理论创新活动的起点

人们从探索的实践活动中概括出理论,又用理论来指导自己的普遍实践。创新实践推动理论创新,理论创新反过来又指导创新实践的发展。理论创新就是在现有理论基础上的进步或发展,在现有理论基础上的发明或创造。理论创新是连续性的,是循序渐进、持续发展和永无止境的。理论创新虽然有大小和高低之分,但无学科范围之限。理论创新的普遍规律是善观察、勤思考、广合作、多实践。善观察是理论创新的基础,是理论创新行为活动的起点,是从事理论创新思维活动的基础和源泉。     

社会分层研究中的基本理论范式与最新进展评述

在社会分层理论中,阶级分析理论和多元社会分层理论提供了两种不同的、但是最基本的理论范式和分析框架.它们代表了两种不同的理论取向,给后来的社会分层研究以极大影响.如今某些社会分层理论,如新马克思主义、新结构主义、社会网络与资源理论、市场转型理论及消费主义分层理论等,不过是在这两个理论框架下的延伸.社会分层理论的发展为人们更好的观察认识社会结构与社会变迁提供了广泛的研究视角.     

关于马克思主义理论创新的几点思考

理论是否具有创造性、是否坚持了马克思主义，是评价马克思主义理论创新的内在标准；理论是否对实践具有指导意义，是评价理论创新的外在标准。马克思主义自身的开放性和批判性，是马克思主义理论创新的内在动力；社会实践的发展，是理论创新的外在动力。马克思主义理论创新是通过理论与实践的结合实现的，理论和实践相结合的过程就是马克思主义理论创新的过程。     

学习动机理论与课堂教学

是什么原因引起学生最初的学习意愿?学习动机理论试图对这个问题作出解释。学习动机理论包括认知成就动机理论和归因动机理论,人本主义的动机理论,行为主义的强化动机理论等。这些动机理论都可以应用到课堂教学中去。     

粘附理论发展述评

对粘附理论的发展加以述评，主要包括机械连结理论、吸附理论、静电理论和扩散理论。     

试论关联理论对会话含意理论的发展

Grice的会话含意理论是语用学理论的基础。关联理论比会话含意理论更具有解释力。在分析两种理论基本差异的基础上,从交际模式、语境概念、语用推理三个方面深讨了关联理论对会话含意理论的发展。     

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.     

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.     

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.