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1.
李爱国 《科技信息》2009,(4):157-157,153
高校在建立信息化校园的过程中由于部门相对独立,造成了学校各部门信息系统异构,难以共享。为了消除校园中的“信息孤岛”,本文提出了一个基于网格服务资源共享系统的方案,通过对校园服务网格模型的研究以及服务开发部署过程的分析,设计与实现了基于GT4中间件的校园服务网格架构,将校园内资源进行整合,实现共享。  相似文献   

2.
数据网格信息服务研究   总被引:2,自引:0,他引:2  
在中间件Globus的MDS基础上,构建数据网格信息服务的分布式体系结构,提出了构成数据网格信息服务基本框架的模块和协议,使数据网格能高效地对海量数据进行存储、信息发现、访问和管理。  相似文献   

3.
为了有效地整合分布在8个城市,12个大学数字博物馆的大量资源,实现各种资源的互连互通与有机共享,消除标本信息“孤岛”现象,大学数字博物馆应用网格(UMDGrid)以CGSP网格中间件为支撑平台,通过网格门户为各种不同类型的用户提供“一站式”标本信息服务.提出了基于CGSP的大学数字博物馆应用网格系统架构,并且给出了本体及其服务的构建方法,以支持各种大学数字博物馆标本信息之间的互操作.同时介绍了网格环境下异构数据库数据访问和集成方法及其中间件UDMGrid-DAI,以及监控UDMGrid系统和资源的工具UDMGMon等.系统测试和实验结果表明了该方法正确实用.  相似文献   

4.
在中间件Globus的MDS基础上,构建数据网格信息服务的分布式体系结构,提出了构成数据网格信息服务基本框架的模块和协议,使数据网格能高效地对海量数据进行存储、信息发现、访问和管理。  相似文献   

5.
在中间件Globus的MDS基础上,构建数据网格信息服务的分布式体系结构,提出了构成数据网格信息服务基本框架的模块和协议,使数据网格能高效地对海量数据进行存储、信息发现、访问和管理.  相似文献   

6.
语义网和网格的出现是为了解决Web技术存在的各种缺陷,更好的实现网络环境下的信息共享和协同工作,它们代表互联网技术未来发展的两个方向。而知识网格是这两种新技术的结合,被喻为是下一代网格技术。知识网格通过语义网技术来实现信息处理和知识获取,采用层次性网格体系结构来构建资源共享、信息共享的平台,为信息服务的提供更高层次的集成和共享服务。  相似文献   

7.
通过计算服务共享系统的用户交互、需求转换、信息查询和程序运行管理四个模块介绍了在网格环境下实现计算服务共享的基本问题和技术方案 .网格中间件GlobusToolkit的信息服务和资源管理为其中的部分问题提供了解决方案 .还介绍了对网格科学计算的理解和预期的工作  相似文献   

8.
分析了旅游目的地营销系统(DMS)的数据库现状,探讨了其数据库资源的特点和旅游者、旅游企业对数据集成的需求.通过对不同数据集成方案的比较分析,采用基于Web Ser-vice异构数据集成中间件技术,设计了DMS的异构数据集成中间件,分析该中间件的设计思路与实现流程.阐述了中间件配置管理、查询构造、查询分解、查询执行和重组等模块的设计.该异构数据集成策略,可以使DMS系统数据库与旅游企业自身数据库连接,以实现旅游信息资源的共享.  相似文献   

9.
一种基于XML的异构数据源集成的方法与实现   总被引:11,自引:0,他引:11  
异构数据源的集成问题是当前数据处理领域内研究的一个热点,它能更有效地利用信息资源、实现数据共享,文章提出了一种基于XML为中间件的异构数据源集成的方法,并予以实现,首先介绍系统整体框架结构的层次模型和每一层的服务功能,然后对其中的关键问题,如模式转换和XML中间件技术做了详细说明,并结合实例进一步说明了模式间的映射算法以及转换器的具体实现。  相似文献   

10.
下一代的网格技术--知识网格   总被引:3,自引:0,他引:3  
语义网和网格的出现是为了解决Web技术存在的各种缺陷,更好的实现网络环境下的信息共享和协同工作,它们代表互联网技术未来发展的两个方向.而知识网格是这两种新技术的结合,被喻为是下一代网格技术.知识网格通过语义网技术来实现信息处理和知识获取,采用层次性网格体系结构来构建资源共享、信息共享的平台,为信息服务的提供更高层次的集成和共享服务.  相似文献   

11.
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.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
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.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

15.
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。  相似文献   

16.
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.  相似文献   

17.
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-  相似文献   

18.
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-  相似文献   

19.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

20.
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with  相似文献   

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