基于事件框架的事件相关文档的智能检索研究

在事件相关文档的检索中,事件主题的迁移和分化与相似事件的干扰是影响系统性能的两个主要因素。本文提出了一种基于事件框架知识和事件主体信息的检索方法。该方法对事件相关评价函数进行了的改进:首先,从事件语料中提炼出事件的框架知识、从事件文档中挖掘出表达事件主体的信息,然后将这些知识和信息进行向量化,最后利用向量化的结果对相关度评价函数进行优化。实验结果表明该方法是有效的,明显提高了事件相关文档的检索性能。     

组件思想在模拟执行的需求检查方法中的运用

模拟执行是一种重要的需求规格说明书(SRS)的检测方法。文章基于面向嵌入式实时系统的需求描述模型RTRSM,提出了如何将组件化的思想和技术应用于模拟执行的检查方法中,从而增加了SRS的可靠性和正确性。最后,文章提出了根据需求描述模型直接生成框架代码的构想,这也是一种从需求直接生成嵌入式实时系统的探索。     

火力发电厂分岛招标应注意的问题

火力发电厂以分岛招标形式建设的工程已经有许多,但由于特殊国情及对分岛招标工程的不同理解,也由于个人所站立场不同,在编制招标书、招标过程及合同执行期间有许多具体问题。     

An evaluation of methods for prioritizing software requirements

This article describes an evaluation of six different methods for prioritizing software requirements. Based on the quality requirements for a telephony system, the authors individually used all six methods on separate occasions to prioritize the requirements. The methods were then characterized according to a number of criteria from a user's perspective. We found the analytic hierarchy process to be the most promising method, although it may be problematic to scale-up. In an industrial follow-up study we used the analytic hierarchy process to further investigate its applicability. We found that the process is demanding but worth the effort because of its ability to provide reliable results, promote knowledge transfer and create consensus among project members.     

Requirements for a COTS software component: A case study

The goal of the GUARDS project is to design and develop a generic fault-tolerant computer architecture that can be built from predefined standardised components. The architecture favours the use of commercial off-the-shelf (COTS) hardware and software components. However, the assessment and selection of COTS components is a non-trivial task as it requires balancing a myriad of requirements from end-users and the preliminary architecture design. In this paper, we present the requirements and assessment criteria for a specific COTS software component, the operating system kernel. As an interface specification constitutes a major compatibility criterion for the selection of COTS components in GUARDS, a particular emphasis is placed on operating system conformance to the POSIX 1003.1 standard. We discuss the general lessons learned from the assessment process and raise a number of questions relevant to the assessment of any COTS software component.     

Improved practical support for large-scale requirements prioritising

An efficient, accurate and practical process for prioritising requirements is of great importance in commercial software developments. This article improves an existing cost-value approach in which stakeholders compare all unique pairs of candidate requirements according to their value and their cost of implementation. Techniques for reducing the required number of comparisons are suggested, thus making the process more efficient. An initial approach for managing requirements interdependencies is proposed. A support tool for the improved process has been developed to make the process more practical in commercial developments. The improved process and its support tool have been applied and evaluated in an industrial project at Ericsson Radio Systems AB. The results indicate a pressing need for mature processes for prioritising requirements, and the work presented here is an important step in that direction.     

The ARCHIMEDES Network System: a system for searching and accessing information in multiple multimedia sources

The amount of information available to information workers recently has becomeoverwhelming. This confronts information workers with two majorproblems: finding the information needed, and accessing it; they arecalled the search problem and the access problem, respectively. Asthe main result of our research an architecture is specified of anautomated tool that provides integrated support for searching andaccessing multimedia documents that may be located at arbitraryplaces. The architecture contains a database with information aboutthe documents and with thesaurus-like information. The architecturealso contains a browse mechanism and a query mechanism for inspectingthe database. In the design process of the architecture, severalfundamental questions arose, like “What is a document?”and “ What is a medium kind?”. The developed answers tosome of these questions are considered to have a general characterand thus to be useful also outside the scope of the research at hand.The paper concludes with an overview of the current status of theproject and a discussion of future work.     

基于决定的软件需求工程模型的设计与实现

需求工程是软件工程生命周期的初始阶段，其最终结果是软件需求规约。本文对需求工程的有关内容进行了剖析，设计了一个基于决定的软件需求工程模型ＤＢＳＲＥＭ，并给出了该模型的实现框架。ＤＢＳＲＥＭ的运作需要知识环境，方法工具和实现技术的支持。     

MING-I: a distributed interactive multimedia document development mechanism

The next generation of interactive multimedia documents can contain both static media, e.g., text, graph, image, and continuous media, e.g., audio and video, and can provide user interactions in distributed environments. However, the temporal information of multimedia documents cannot be described using traditional document structures, e.g., Open Document Architecture (ODA) and Standard Generalized Mark-up Language (SGML); the continuous transmission of media units also raises some new synchronization problems, which have not been met before, for processing user interactions. Thus, developing a distributed interactive multimedia document system should resolve the issues of document model, presentation control architecture, and control scheme. In this paper, we (i) propose a new multimedia document model that contains the logical structure, the layout structure, and the temporal structure to formally describe multimedia documents, and (ii) point out main interaction-based synchronization problems, and propose a control architecture and a token-based control scheme to solve these interaction-based synchronization problems. Based on the proposed document model, control architecture, and control scheme, a distributed interactive multimedia document development mechanism, which is called MING-I, is developed on SUN workstations.     

声音文件存储结构及其连接的处理

本文针对声音文件（ＷＡＶ）的特点，给出了一种基于多媒体文件概念模型的声音文件的存储文件，提出了解决声音文件连接的处理技术，给出了其设计原理的理论依据。