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1.
分析了电厂环境下系统改造升级、信息系统与实时系统集成、信息系统中不同厂商的软件集成的数据集成需求,设计并实现了基于多种数据接口ODBC,ADO,BDE,DDE的通用数据转换软件,并利用该软件实现了通用性强、简单、实用的电厂信息系统数据集成方案.最后对方案进行了分析.  相似文献   

2.
石小艳 《科技信息》2009,(26):I0222-I0222,I0224
异构数据源的存在给实现不同信息系统间数据的互访带来了很大的不便,异构数据源集成是解决网络条件下“信息孤岛”问题的有效途径。本文对异构数据源集成的问题进行了深入的研究,在研究和比较了各种集成的方法和体系结构之后,重点研究了基于webService的异构数据源集成技术,论述了webService的技术特点和在异构数据源集成上的优势。  相似文献   

3.
在已有的城市土地信息系统基础上,开发实现农村土地信息系统,实现对农村土地的高效管理及可持续利用.本系统采用集成开发模式,基于Visual Studio2010平台和ArcGIS Engine 10.0,利用C#语言编程实现.该系统能够实现基于数据库和用户的统一管理,即通过空间数据引擎(ArcSDE)来管理数据;实现了多种格式数据的存储、管理和分析;根据用户需求定制的利用属性查图形及利用图形查属性模块,提供友好便捷的数据查询模式.  相似文献   

4.
基于GIS的地籍管理信息系统设计   总被引:1,自引:0,他引:1  
提出了利用Map Info和Delphi集成开发基于GIS的地籍管理信息系统的设计、建立过程,阐述了地籍管理信息系统的总体结构和主要模块的功能及实现方法。  相似文献   

5.
本文提出信息系统开发的一种新方法:综合信息系统的共性设计了通用功能模块;研制出软件工具和集成开发环境,基于开发工具和环境,采用多口循环的原型法。本文还讨论了软件工具的主要技术和集成环境的方法。实践证明,本方法可以提高信息系统的开发效率,提高软件的质量和可维护性。  相似文献   

6.
张凯 《科技信息》2013,(19):82-83
随着信息化的不断加深,电网公司营销和生产业务均不同程度上的实现了标准化、流程化的目标。现有的诸多信息系统(配电自动化、营销信息系统、生产管理系统、用电信息采集系统等),目前都是基于各自特定的需求分别独立开发的,未考虑信息交互和业务流转的需求。基于国家电网公司统一推广的GIS平台构建的信息集成平台,提出了基于GIS信息系统的营配数据集成平台建设,在于打破生产和营销系统间的数据隔阂。实现配电网管理的精细化,特别是营配协同管理模式的提出,打破现有信息孤岛的现状,实现营配用数据、信息的整合和流通。  相似文献   

7.
基于组件技术的信息系统设计与实现   总被引:2,自引:0,他引:2       下载免费PDF全文
介绍了基于组件开发(CBD)的概念,提出了基于组件的信息系统开发过程———CBSIDPM.对CBSIDPM中关键部分“信息系统应用组件集ISACS”进行了层次分析、功能部件分解分析,把ISACS归纳为9个组件,并运用面向对象的方法对这9个组件进行了设计.以集成化网络办公应用开发平台Netcase Anywhere为开发集成平台,实现了ISACS,形成了一个基于Netcase的信息系统应用组件集NBISACS,利用该组件集可以大大提高信息系统的开发效率.  相似文献   

8.
分析了电厂环境下系统改造升级、信息系统与实时系统集成、信息系统中不同厂商的软件集成的数据集成需求 ,设计并实现了基于多种数据接口ODBC ,ADO ,BDE ,DDE的通用数据转换软件 ,并利用该软件实现了通用性强、简单、实用的电厂信息系统数据集成方案 .最后对方案进行了分析 .  相似文献   

9.
塔里木河流域遥感影像数据库系统的设计和建立   总被引:3,自引:2,他引:3  
目的 采用当前非常流行的数据仓库技术管理塔里木河流域海量遥感影像、背景数据,实现塔河流域管理的数字化、信息化。方法 采用当前流行的数据仓库管理技术,按照空间数据-属性数据一体化、多源数据无缝集成及基于C/S结构和关系数据库3层体系结构的设计思想,将塔里木河流域遥感信息、空间地理信息、多专题信息、社会经济信息,以及多媒体和元数据等各类信息进行集成建库。结果 实现了多类型、多尺度的海量遥感影像、空间地理等基础数据的无缝集成和统一管理。结论 综合使用遥感、地理信息系统、数据库等技术,建立基于动态监测与管理的生态环境信息系统,具有明显的工程优势和技术优势。  相似文献   

10.
一种基于SOA的数据集成体系结构   总被引:5,自引:1,他引:4  
随着分布式计算技术的兴起,数据源的异构性、分布性、自治性导致了“信息孤岛”问题的出现,因而数据集成技术日益成为目前的研究热点。结合面向服务的体系结构(SOA)及Web Service技术,提出了一种基于面向服务架构的数据集成体系结构,并结合应急信息决策支持系统的开发给出了其实现方法。  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.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

18.
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   

19.
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   

20.
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   

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