基于Web服务的空间信息共享与互操作模型研究

分析了传统的解决空间信息共享与互操作方法存在的不足,提出从数据共享、功能互操作系统集成等多面考虑实现空间信息共享与互操作的设计思想,建立基于Web服务的分布式空间信息共享与互操作模型,对模型的功能及空间数据共享与互操作的工作过程进行阐述,并给出对比评价。此模型对有效构建Web空间信息服务具有参考价值。     

基于Web服务的空间信息共享与互操作模型研究

分析了传统的解决空间信息共享与互操作方法存在的不足，提出从数据共享、功能互操作系统集成等多面考虑实现空间信息共享与互操作的设计思想，建立基于Web服务的分布式空间信息共享与互操作模型，对模型的功能及空间数据共享与互操作的工作过程进行阐述，并给出对比评价。此模型对有效构建Web空间信息服务具有参考价值。     

基于网格技术的数字图书馆互操作关键技术

为了解决Internet上大规模的数字图书馆互操作问题,在原有OAI-PMH框架的基础上,提出一种基于网格技术的数字图书馆互操作框架--数字图书馆网格(DL grid),给出了3层DL grid体系结构,并对元数据资源的发现、采集、重组、利用等关键技术进行了分析、设计与实现.通过集成的元数据,实现了Web上数字图书馆信息的共享.     

基于GMk编码的地理信息共享研究

地理信息共享是近年来GIS领域的一个应用研究热点.OGC制定的GML为地理信息共享提供了新的思路.设计了基于GML编码的空间信息共享的模型,探讨了空间信息向GML数据的转换,最后验证了地理信息共享模型的可行性.     

地理空间信息共享理论基础及其解决方案

为解决地理空间信息共享问题 ,提出从地理空间信息本身的产生、表示和管理入手 ,探讨地理空间信息共享的理论基础 ,内容包括地理空间信息的抽象模型建立、简单要素模型、空间关系模型和空间参照系模型等。从地理空间信息表示和管理的角度出发提出两种解决方案 ,即地理空间信息标识语言 Geo ML和元数据管理模型 ,并设计实现了原型系统 ,实现了地理空间信息的网络共享     

一种基于XML的WebGIS多源异构数据集成方案

本文提出了一种基于XML的WebGIS多源异构数据集成方案,在该方案中,既可对不同数据源上载到空间数据库,也可将不同数据源进行模式映射和转换而存储为XML数据库.对于空间数据库,调用GIS应用服务器上的Web Service对其进行数据抽取并转换为XML格式;对于XML数据库,则直接通过封装了XML查询的Web Service进行数据抽取;最终使异构空间数据集成于XML这一文本格式.同时,还可通过对已定义的Web Service进行发布和注册实现本系统GIS数据库服务器上数据资源的共享,也可以通过搜索Internet上已发布和注册的相关Web Service,通过对其引用而实现异地数据的集成,由此实现空间数据之间的共享与互操作,实现多源异构的地理空间数据的有机集成.最后通过XSLT将XML转换为SVG实现地理空间数据的可视化.     

基于XML和RDF的异构空间信息共享模型

分析网上空间信息的异构性及共享解决方案,提出了一种新的基于XML和RDF的异构空间信息共享模型．采用了XML,RDF技术解决空间信息的语法和语义异构问题,设计了空间信息表示分级共识矩阵,将信息异构分解到各个表示级别以简化信息转换,在每一级别又提取空间信息领域的共识来表示信息以促进应用程序对信息的正确理解和语义互操作．实例证明了该模型能有效解决异构空间信息的表示和交换问题,满足用户空间信息共享的需要．     

基于web service的NDVI计算模型服务的实现与应用

研究和总结了基于web service的空间信息集成技术,提出了基于web service的NDVI计算模型服务架构,该方法町以实现空间计算模型的跨平台性和互操作性,大大提高空间计算模型的共享.利用该方法对NDVI进行web service的封装和网络发布,很好地解决了传统植被指数计算模型的共享和互操作问题,也为其他窄间计算模型的web service集成与应用提供了参考.     

福建省林业信息服务平台的研究

结合福建省“数字林业”的建设，初步提出了基于web服务构建福建省林业信息服务平台的解决方案；详细分析了福建省林业信息服务平台体系结构设计、功能模块设计及其实现方法，并对平台涉及到的信息共享标准化、多源异构空间数据的集成和互操作、基于网络的空间信息智能表达方法、WebGIS交互操作方法等关键技术进行探讨研究。     

基于GML编码的地理信息共享研究

地理信息共享是近年来GIS领域的一个应用研究热点,OGC制定的GML为地理信息共享提供了新的思路,设计了基于GML编码的空间信息共享的模型,探讨了空间信息向GML数据的转换。最后验证了地理信息共享模型的可行性。     

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.     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-