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1.
协同商务环境下基于案例推理机制研究   总被引:1,自引:0,他引:1  
在激烈的市场竞争中,为企业提供一种整合企业内外资源进行企业运作的策略显得尤为重要.协同商务正是为了满足企业这样的要求而出现的新的管理理念,通过跨组织的知识共享和重用,在协同工作的过程中寻求新的商业机会,最终敏捷地制造和提供更加适合客户需求的产品和服务.基于案例推理(CBR)是一种重用历史问题的解决方案以得到新问题解决方案的技术,把CBR技术应用于协同商务,提出基于案例的协同商务推理模型,并研究了协同商务条件下的案例协同推理过程.  相似文献   

2.
面向产品生命周期的知识驱动协同设计策略   总被引:3,自引:0,他引:3  
从产品生命周期的视角,研究实现知识驱动协同设计的深层产品开发理念.提出了在基于知识的工程环境下,实现知识驱动协同设计的解决方案:利用协同Agent的事件监控、过程跟踪进行设计工作的协同;通过建立产品的知识模型来驱动设计方案及相应几何实体的生成,实现产品设计的知识驱动和知识重用.采用了项目主页机制,提供企业间信息集成与共享的途径,实现产品开发知识的共享.构建了基于系统封装的知识驱动协同设计的原型系统.断路器开发实例表明,原型系统既能够有效地利用企业已有知识资源进行产品协同创新开发,又具有可操作性和实用价值.  相似文献   

3.
在分析了网络化协同环境下产品设计知识管理特性的基础上,提出了一种适合于实现协同环境下产品设计知识共享的知识分类体系和知识表达模型。根据网络化协同环境下知识共享的特点,将产品设计知识进行了分类。按照设计知识的表达体系将共享知识分为数据表类、语言数据类、图形类、图纸类、模板类五种表达方式,并采用分层的XML描述语言,给出各类知识的表达模板。  相似文献   

4.
以复杂性理论为基础框架,通过构建开放式创新环境下的企业知识共享模型,并设定其属性及知识共享规则,利用系统仿真方法对开放武创新环境下知识共享的系统动态行为进行研究.结果表明,开放式创新的环境容量、知识存量离散程度与知识共享效率成反比相关关系,知识共享意愿的离散程度与知识共享效率成阶段性相关关系.此外,知识共享意愿离散系数在为0.35的条件下,知识共享意愿提高后,共享效率提高,表明提高知识共享意愿可以促进知识共享效率,认为企业知识共享模型与系统仿真是开放式创新环境下企业知识共享效率提高的重要辅助理论与方法.  相似文献   

5.
协同商务链是一种有利于中小企业生存和发展的新型商业运作模式,选择适当的合作伙伴是成功运作协同商务链的关键步骤之一。协同商务链具有信息共享、协同交互、互惠共生等特点,其本质是一种基于合作的链条。这种合作是竞争中的合作,每个网链上的节点企业选择合作伙伴都有其特定的原因和策略。本文以生产企业为例,对中小企业协同商务链合作伙伴选择进行了论证。  相似文献   

6.
基于SOA的网格制造单元构造方法   总被引:1,自引:0,他引:1  
为解决动态、分布与异构制造资源的集成与共享,实现合作伙伴间的商务协同、制造协同、供应链系统,讨论了网格化制造模式下网格制造单元的构造和抽象过程.网格制造单元划分为设备网格、信息系统网格和知识网格,设备资源通过构造层的抽象封装成设备网格,基于J2EE和Microsoft.net的软件系统和数据库被封装成信息系统网格,在此基础上,运用知识和服务流技术,构建知识网格.  相似文献   

7.
知识在软件过程建模中起着关键性的作用,然而建模过程中的知识管理机制却没有引起足够的重视。探讨基于工作流的协同软件过程建模环境中以主体为基础的知识共享机制。首先讨论开发过程中的共享知识元素,并提出知识库模型和基于知识流的知识通信机制,最后介绍基于主体的知识管理的实现方法。  相似文献   

8.
针对多学科协同产品设计的需求,提出了一种基于.3D格式共享模型的协同过程交互控制技术.分析了基于共享模型视图的多学科协同设计模式,建立了浏览器/服务器(B/S)结构、消息驱动的协同过程产品模型共享环境,给出了双令牌的基于设计优先权和排序时间的共享模型互操作方法,完成了设计消息的XML封装、交换与共享.在基于Web的分布式、异构环境下完成了原型系统开发.该方法为协同产品设计过程提供了一个分布式的、应用模型共享的工作空间.  相似文献   

9.
基于SOA的网格化制造模式及体系结构   总被引:3,自引:0,他引:3  
为解决动态、分布与异构制造资源的集成与共享,实现合作伙伴间的商务协同、制造协同、供应链系统,在网络化制造理论与技术基础上,提出了基于SOA(service oriented architecture,面向服务的架构)的网格化制造模式,以解决动态联盟企业或虚拟组织中各种物理和逻辑资源的共享和集成问题.分析了网格化制造的功能模型,构造了包括应用层、工具层、企业建模层、业务逻辑表示层及基础支撑平台等层次的体系结构,在此基础上,基于消息中间件和消息传输技术建立了网格制造单元的消息通信模型.  相似文献   

10.
在分析科研知识获取现状的基础上,结合网络环境下信息资源的显著特征,提出了将博客、维基和信息聚合等Web2.0技术进行综合运用,利用网络开放性的信息资源构建科研知识信息平台,详细阐述了各种科研知识共享平台的创新技术,最后构建了一个基于Web2.0的科研知识共享交流平台新模型,以期有效促进科研人员之间的信息交流,提高知识共享的效率与水平。  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.
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   

14.
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   

15.
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   

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.
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   

18.
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   

19.
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.  相似文献   

20.
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