基于路径仓的面向对象XML查询处理技术

XML正在迅速成为Internet上数据表示和交换的标准,存储与查询XML数据变得日益重要,如何快速、准确地查询面向对象的XML数据成为当前研究的热点,索引技术是提高查询效率的有效方法。该文基于路径仓索引模式,提出了一种面向对象的XML数据的查询处理技术。     

辅助型工艺知识库组成及知识获取方法

为了适应计算机辅助工艺设计由面向自动化向面向辅助的转变，文章提出了辅助型工艺知识库的概念，对组成辅助型工艺知识库的工艺基础知识库和工艺规则库的内容进行了详细的阐述，比较了辅助型工艺知识库和决策型工艺知识库在内容、知识获取方法和构建知识库的代价等方面的区别，讨论了用语义匹配、文本聚类、关联规则和序列模式等数据挖掘技术进行辅助型工艺知识的自动获取方法，并给出了应用实例。     

美国尤卡山高放废物处置库项目费用削减的原因分析

介绍了美国尤卡山高放废物处置库项目2009年和2010年费用遭到削减这一事件的来龙去脉,从政治、情感、技术、经济和资源再利用几个方面分析了尤卡山项目经费削减的原因,指出美国参议院多数党领袖里德的激烈反对以及政治考虑是导致费用削减的主要原因。同时介绍了一系列反对削减尤卡山项目经费的观点。     

高放废物地质处置库花岗岩体预选研究

简要介绍了应用遥感技术结合地质研究,优选高放废物地质处置库花岗岩体的思路和方法.以北山外围地区为例,通过遥感数据处理,遥感影像解译,岩体地质特征分析,岩体预选准则的建立,在野外勘查的基础上,预选了若干有利的花岗岩体.为优选高放废物地质处置库场址提供决策依据.     

基于CommonKADS模型的知识库应用

针对中小规模知识库系统中存在的知识表示能力不够、知识搜索广度不足的问题,本文结合CommonKADS模型从两个方面着手来解决：一方面用本体对知识进行表示,增强知识语义表达能力;另一方面,为了实现不同领域知识间的交流,将桥本体引入到知识模型中,发挥其在领域之间的“桥梁”作用,从而保证和提高系统的问题求解效率和能力。最后,以
以操作系统知识为背景,介绍知识库的实现并对措施的有效性给予验证。     

Recent Waste Management Related Developments in Germany

The Federal Republic of Germany intends to dispose of all types of radioactive waste in deep geological formations. This waste comprises spent fuel elements, vitrified fission products, nuclear power plant operational and decommissioning waste as well as spent sealed radiation sources and miscellaneous waste originating from small waste generators. The Federal Government made a pronounced change in energy policy since 1998, the most important feature of which is the abandoning or phasing out of nuclear energy, finally set in force by the April 2002 amendment of the Atomic Energy Act. According to the new approach to waste management and disposal, further sites in various host rocks shall be investigated for their suitability. A special expert group was set up to develop repository site selection criteria and respective procedures on a scientifically sound basis. The objective of the site selection procedure is to identify—with public participation—potential disposal sites in a comprehensible and reliable way. Step by step and based on the said criteria, those areas, site regions and eventually sites shall be selected, which offer particularly favourable conditions for the later demonstration of the final site's suitability and its confirmation in a licensing procedure.     

仓储库的发展

文章从仓储库的发展背景、仓储库管理的信息内容、采用的技术三方面对仓储库的发展历程进行了回顾。并且根据这三方面将仓储库的发展分为三阶段： 集中在数据管理阶段、 集中在应用系统开发阶段、 集中在企业所有信息阶段。     

基于刻面描述的构件检索

随着软件复用实践的深入和软件构件库规模的扩大,对软件构件的表示与检索的研究正受到越来越多的重视.针对基于刻面描述的软件构件,结合模式分析中的树匹配思想,根据构件刻面描述的特点,提出了一种基于树包含(tree inclusion)的构件检索方法,并进行了理论上的分析与实验上的检验.实验结果证明了它的可行性与有效性.     

Fast detection of exact clones in business process model repositories

As organizations reach higher levels of business process management maturity, they often find themselves maintaining very large process model repositories, representing valuable knowledge about their operations. A common practice within these repositories is to create new process models, or extend existing ones, by copying and merging fragments from other models. We contend that if these duplicate fragments, a.k.a. exact clones, can be identified and factored out as shared subprocesses, the repository's maintainability can be greatly improved. With this purpose in mind, we propose an indexing structure to support fast detection of clones in process model repositories. Moreover, we show how this index can be used to efficiently query a process model repository for fragments. This index, called RPSDAG, is based on a novel combination of a method for process model decomposition (namely the Refined Process Structure Tree), with established graph canonization and string matching techniques. We evaluated the RPSDAG with large process model repositories from industrial practice. The experiments show that a significant number of non-trivial clones can be efficiently found in such repositories, and that fragment queries can be handled efficiently.     

开源软件自动化评估证据框架

互联网上已形成了规模巨大、种类丰富的开源软件资源。如何准确、快速地判断一个开源项目的各种可信属性是否满足需求是当前软件工程领域研究的热点。深入分析已有开源软件评估模型,总结互联网上软件质量相关的各种信息,提出了面向开源软件的可信评估证据框架,并基于该框架构建了一种开源软件可信证据查询平台。利用该平台能够极大地提高评估效率,用户可以准确、快速、全面地了解相关软件项目的各种信息。最后,以一个知名开源软件证实了该证据框架及证据查询平台的可行性。