文本分词的自动校对

讨论和分析了自动分词的现状，并针对分词问题，提出了一种基于规则的中文文本分词自动校对方法。该方法通过对机器分词语料和人工校对语料的对比，自动获取中文文本的分词校对规则，并应用规则对机器分词结果进行自动校对，提高分词语料的质量。     

汉语分词技术研究现状与应用展望

汉语自动分词是计算机中文信息处理系统的基础和难题，本文对近年来的汉语自动分词的研究方法与成果进行了分析综述。探讨了分词中存在的一些关键问题，同时介绍了分词技术在科研以及商用系统中的应用。并展望了未来分词技术在应用方向的发展．     

基于统计的无词典分词方法

通过分析词的结合模式，提出无词典分词模型，并对该模型进行实验测试。测试结果表明，无词典分词模型能够满足快速分词的要求。     

基于词形的最佳路径分词算法

在基于词形统计模型分词算法的基础上，通过以存词表结构的有效组织及改进词的匹配算法和切分算法，并以最佳路径法实现了一种快速的基于词形的分词算法，在保证了较高准确率的同时，大大提高了分词速度。     

汉语音节全分词算法

本文在统一的分词模型──分词图的基础上，提出了一种汉语音节全分词法，它可以给出在分词词典约束下所有可能的分词结果，为高层的句法、语义分析提供了多个候选结果，避免了在某种具体准则下丢失分词结果的困难，因此适用面比较广．     

基于Lucene的智能答疑系统的研究与实现

在对Lucene现有的中文分词器进行深入分析的基础上,提出了适合中英文处理的分词器.把研究内容应用在网络答疑系统中,建立问题库,利用Lucene对已有的问答进行全文检索,实现了智能答疑的功能.最后设计了一个对搜索出来的问答进行排序的方法,以便提高系统的使用价值和性能,更好地实现智能答疑.     

刍议地道英语的特殊表达方式

从对动词及动词短语的妙用入手，从而阐明地道英语并不是神秘的和无法掌握的，它就在我们日常英语学习中。     

中文分词技术

在现代化的社会,为了更好的利用计算机来处理以自然语言为载体的信息,让计算机能读懂人类的语言,只有计算机读懂了人类的语言,人和计算机的交流才成为可能,对于中文来讲,词是语言的最小单位,所以,汉语的文本分词是解决该问题的第一步,本文重要介绍了中文分词的必要性,以及中文分词的方法和存在的问题。     

基于最大概率分词算法的中文分词方法研究

本文提出了一种基于最大概率分词算法的中文分词方法，以实例贯穿全文系统描述了最大概率分词算法的基本思想与实现，根据针对大规模真实语料库的对比测试，分词运行效率有较大提高，该方法是行之有效的，并且提出了该算法的改进方向。     

应用“层次分析法”优化汉语盲文分词连写规则

应用现有的分词连写规则书写汉语普通话盲文，会因人因时而得到不同的分词结果。为减少这种分词的不确定性，提出了应用“层次分析法”优化分词规则的方案。首先论述了普通话盲文的“结构分层”理论，继而给出了优化分词连写规则的总体原则、思路和优势，在详细介绍层次分析法基础理论后给出了应用层次分析法分词的原则，并列举有代表性的11个实例进行分析。改进的分词策略，不仅简化了分词规则、在很大程度上减少了盲文分词的不确定性，简单易用。     

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.