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基于知识源的专家系统知识获取技术 总被引:6,自引:0,他引:6
胡明晖 《成组技术与生产现代化》2005,22(2):25-28
基于专家系统开发中的知识获取的瓶颈问题,文章提出基于知识源分类的知识获取技术研究思路.将知识源分为领域专家、文献数据库和专家系统的自学习机制,并对这些知识源的特点进行了分析,并结合专家系统知识源的特点,提出了相应的知识获取技术. 相似文献
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通过应用计算机可视化技术、二叉树表达技术、XML数据库技术和推理技术,开发了基于可视化技术的专家知识采集与知识推理系统.其推理机利用了无状态连续推理技术,提高了有害生物知识采集和系统推理的效率.系统具有简单易用的特点,植保专家可以方便地利用该系统构建有害生物调控知识库. 相似文献
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目的 在移动互联网高速发展的背景下,了解用户使用知识获取类平台意愿的影响因素,为平台的设计和服务提供参考。方法 通过用户调研、因子分析和线性回归分析,发放问卷450份,确定影响用户使用知识获取平台的具体因素,并分析以上要素和用户使用意愿之间的影响关系,以及各因素间的内在关联程度。结果 因子分析显示,影响用户使用知识获取类平台的主要因素是社交互动、功能质量、有用性和安抚性,其中社交互动是影响用户使用意愿的最重要因素,接着依次为功能质量、安抚性和有用性。多元线性回归分析显示,社交互动和功能质量是影响安抚性的直接因素且社交互动对功能质量产生影响。有用性在促进社交互动的同时受到功能质量的影响。结论 知识获取平台在开发设计时应着重增强用户间的交流互动、提供完善的产品功能、聚集优质资源并提供针对性内容以缓解用户的知识焦虑,最终提升用户对平台的使用意愿。 相似文献
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航天电子设备故障诊断专家系统知识获取方法 总被引:3,自引:0,他引:3
针对专家系统知识获取难的问题, 结合航天设备特点和知识获取的一般规律, 提出航天电子设备故障诊断专家系统采取分阶段方法解决知识获取问题. 在知识获取的第一阶段, 根据设备知识源比较丰富的特点, 采用基于故障树分析法的方式进行故障归类; 在知识获取的第二阶段, 根据基于范例推理的匹配算法从范例库中提取最佳范例; 根据实际情况对范例进行修正; 利用最近邻算法完成范例库的知识获取. 基于该思想构建的某航天电子设备故障诊断专家系统可以充分利用现有技术资料增强专家系统自动获取诊断规则的能力. 相似文献
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Product development is a knowledge-intensive activity in manufacturing enterprises. This paper analyses various forms of knowledge resources in the product development process and studies the representation scheme for them. Then a novel distributed knowledge sharing model is proposed for spreading and sharing knowledge among engineers in collaborative product development teams. In a collaborative team, engineers usually come from diverse disciplines; their demands for knowledge are also different from each other. The proposed knowledge sharing model could deliver the proper knowledge to the engineers who may need them. Moreover, our model is based on the engineers’ personal knowledge repositories rather than the centralised team knowledge repository in the collaborative team. The proposed model could bring out an efficient and proactive way for knowledge sharing among engineers in the product development process. The efficiency and usability of the proposed model are validated by experiments referring to the knowledge sharing in a real-world collaborative team of a manufacturing enterprise. 相似文献
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Large studies have shown that knowledge resources have been the real source of innovation and competitiveness of real estate enterprises. Therefore,it is the basic work to establish the real estate enterprise knowledge resources framework for implementing knowledge management(KM),and should be given enough attention. A sort of the real estate enterprise knowledge resources framework system has been built in this paper based on the thought of Clark & Henderson’s enterprise knowledge classification,and the contents have been analyzed and expounded. Thus,the real estate enterprises can grasp clearly the basic contents of its knowledge resources,then depict the knowledge system,in the end the solid foundation should be settled for implementing knowledge management. 相似文献
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In the process of product design, engineers usually find it is difficult to precisely find and reuse others’ empirical knowledge resources, especially the lesson-learned knowledge, which is usually not well collected by the organisation. This study proposes a novel approach, which uses a semantic-based visualised wiki system (SVWkS) to support lesson-learned knowledge reuse. The core of visualised knowledge search framework is a semantic-based topic knowledge map. The architecture of this knowledge map creation method is designed, which has five major modules: lesson-learned items pre-processing, topic extraction, topic relation computation, topic weight computation and topic knowledge map generation modules. Then a working scenario of SVWkS is briefly introduced. We have conducted three sets of experiments to evaluate quality of visualised results-knowledge map, the effectiveness of semantic-based visualised searching mechanisms and the performance of utilising SVWkS for knowledge reuse in outfitting design of a ship-building company. The first experiment shows that knowledge maps generated by SVWkS are accepted by domain experts from the evaluation since precision and recall are high. The second experiment shows a semantic-based visualised searching mechanism supported by semantic relations is more useful than a traditional keyword search in terms of precision and recall. The third experiment shows that SVWkS-based group outperforms keyword search-based group in both learning score and satisfaction level, which are two measurements of performance of utilising SVWkS. The promising results confirm the feasibility of SVWkS in helping engineers to find needed lesson-learned knowledge and reuse-related knowledge. 相似文献
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We correlate thelevel of knowledge of certain formulas in agroup of individuals with certain regular, downward closed, sets of strings. We show that in suitable circumstances, all such sets can occur as
levels of knowledge but that the lack of synchrony, or the lack of asynchrony when there are only two processors in the group,
can create more or less severe restrictions. 相似文献
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为了提高复杂产品开发的效率,驾驭复杂产品开发过程各个环节相互关联的复杂性,提出一种基于知识工程的复杂产品开发过程新模型.该模型把知识工程理论融入复杂产品开发全生命周期过程中,通过知识推理技术从数据库和知识库中获取相应开发阶段的知识和数据来驱动和指导整个复杂产品开发过程,以更好地重用设计知识.研究了该模型的关键技术,包括复杂产品开发知识处理技术和基于知识的CAD/CAM/CAE/CAPP集成技术,提出了两种知识处理方法,即基于规则-对象-框架的知识处理方法和基于规则-实例的知识处理方法,并研究了相应的推理算法;以知识库、数据库、规则库和实例库为基础,通过PDM,STEP中型文件、规则、实例和知识等,实现CAD/CAM/CAE/CAPP集成.最后,通过数据库技术、编程语言VC# . NET和CATIA软件实现了隧道掘进机(TBM)主机的快速设计系统,有效地减少了隧道掘进机主机开发的复杂性和缩短开发周期,以TBM主机为应用实例进一步介绍该模型的合理性和有效性. 相似文献