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1.
分析了领域构件的特征和形态,提出了一种领域构件表示模型,在该模型基础上可以实现领域构件的存储.然后介绍了struts框架及其实现机制,给出了基于struts的领域构件存储管理系统的系统架构,并介绍了煤矿安全领域构件存储管理系统的实现.  相似文献   

2.
文章首先提出公共构件提取与设计原则,总结了MIS公共构件的2大类型:功能类公共构件和信息实体类公共构件;提出了针对两类公共构件的"MIS公共构件提取与设计过程模型".该模型分为3个阶段:公共构件提取、公共构件接口提取与初步设计以及公共构件基于系统体系结构的设计,并在淮北煤矿安全管理信息系统中给出上述过程模型和方法的应用.  相似文献   

3.
提出了一种针对医学检验仪器领域的领域软构件开发方法.首先,对特定领域进行分析,建立领域特征模型和领域元模型;然后,根据领域元模型等领域分析结果识别领域软构件;最后,确定构件模型,并对领域构件进行制作和封装.基于这些构件实现了该领域应用系统的开发,结果表明:构件的易用性较好,复用率也较高,系统的开发效率得以提高.  相似文献   

4.
根据构件自动化组装系统对构件语义检索的需求,介绍了一种面向组装的构件检索方法.该方法将传统的刻面算法与基于领域Ontology的检索匹配算法相结合,借以提高算法的语义检索能力,同时把构件功能采用结构化的描述方式,关联到各个接口.其中详细介绍了构件描述模型和构件检索匹配算法.  相似文献   

5.
软件复用是当前软件开发研究的一个重要领域,基于构件的软件开发方法是复用研究的重点。但是传统的软件设计技术不能很好的满足基于构件的系统的需要。它们对于基于构件的系统的设计只提供了很少的技术和指导。本文提出一种基于接口的构件建模和设计方法。这种方法使用UML作为工具,提供了系统化的构件建模手段。  相似文献   

6.
基于可复用构件的软件开发过程研究   总被引:2,自引:0,他引:2  
本文在分析软件复用和软件构件相关概念基础上,对基于可复用构件的软件开发过程进行了深入研究,主要从开发可复用构件和基于可复用构件应用软件系统构造两方面入手,进一步提出基于可复用构件软件开发基本思路和生命周期模型,可复用构件开发步骤,构件组装应用系统方法等。  相似文献   

7.
基于C/S模式的高校教务管理系统的构件化设计   总被引:1,自引:0,他引:1  
介绍了基于C/S模式的高校教务管理信息系统的开发设计,从系统功能、结构体系等方面具体论述了其技术实现方法。在基于构件的高校教务管理的开发过程中,研究教务管理信息系统的构件化,并给出了基于构件的软件开发方法。  相似文献   

8.
研究了在C Builder平台上,基于面向对象的构件化软件开发方法,开发通用的档案信息管理系统。结合档案管理构件的开发过程,讨论了基于面向对象的构件化的软件开发过程、系统的应用框架设计、构件的体系结构、构件模型、构件的提取、构件的分析和设计等一些关键技术问题。保证了档案管理系统的通用性、适应性和可扩展性。  相似文献   

9.
提出了基于面向对象计算机技术的CAP开放体系结构的新的产品信息建模方法,详细讨论了开放式CAP系统的主要组成部分──产品信息模型(PIM),有助于在系统集成及并行工程下将先前的基于特定功能、依赖专门领域的CAPP扩展至功能驱动、不依赖专门领域的通用CAPP系统。  相似文献   

10.
张斌  蔡奇新  刘建 《科技资讯》2013,(14):18-21
针对江苏省电力计量中心运营管理系统工程建设需要,介绍了基于构件的软件复用技术在该系统建设中的应用思路,重点讨论了基于构件技术的系统设计与实现,包括系统架构、典型业务构件设计与实现、领域构件库设计、构件组装应用系统等,提供了一种新的系统建设思路。  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.
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.  相似文献   

13.
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   

14.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  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.
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。  相似文献   

18.
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.  相似文献   

19.
20.
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  相似文献   

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