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【期刊论文】Technical Issues of Sharing and Integration of OPAC and E-Learning Resources
郑庆华, Qinghua Zheng, Jing Shao, Haifeng Dang, and Huixian Bai
,-0001,():
-1年11月30日
Based on the analysis of the characteristics of both OPAC and e-learning resources respectively, some key issues of sharing and integration, such as data exchange format, searching interface, and supporting platform, were discussed, and a total model for integration of the two resources was proposed. Moreover, a prototype of sharing search system named Fsearch was developed, with which users can search for both OPAC system and e-learning system simultaneously. The result shows that Fsearch system can effectively improve the efficiency of acquiring knowledge for users and bring forward a preferable application prospect.
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【期刊论文】A Resource Reservation and Distribution System over Satellite-Terrestrial Network*
郑庆华, Qinghua Zheng*, Chunsheng Chu
,-0001,():
-1年11月30日
The Resource Reservation and Distribution System over satellite-terrestrial network, that we call the system SkyLod for short, is a platform of learning on demand via the hybrid transmission platform of satellite and ground cable network. SkyLod uses receive-only satellite links for downstream data broadcasting, and terrestrial network (like public telephone networks) to provide the upstream communication path. The broadcast nature of Satellite communication makes it an efJicient way to distribute the large amount of resources, such as multimedia courseware and digital library materials. In this paper, we give the model of SkyLod, propose a new and practical approach of resource reservation and scheduling. The prototype of SkyLod has already been implemented and tested on the platform of ASIA-2R satellite and CERNET (China Educational and Research Network). SkyLod is proved to be efficient, flexible and practical in supporting bulk resource distribution.
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【期刊论文】Semantics-Based Answers Selection in Question Answering System*
郑庆华, Xia Sun and Qinghua Zheng
W. Liu et al. (Eds.): ICWL 2004, LNCS 3143, pp. 354-362, 2004.,-0001,():
-1年11月30日
Motivated by the large requirement of Web answer in E-learning, this paper proposes a novel answer selection scheme of NL-WAS. With our scheme, the semantic types of the user' s question and the semantic templates were used to implement semantics-based answers selection. The semantic type is identified to reduce the retrieval scope firstly. When the semantic type can't be decided easily, the statistical similarity and the semantic similarity are computed to select the right answers. Otherwise, different strategies are proposed to match answers according to the type of user's question. If the semantic types between the user's question and one candidate' s are same, the same parts of their semantic templates are compared. When they have correlative semantic types, the corresponding parts of their semantic templates are compared according to the rules that are used to match different templates. The experimental results show that NL-WAS can answer the most test questions correctly.
QA systems, Semantic Similarity, E-learning, Natural Language Process
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郑庆华, ZHENG Qing-Hua, LI Ren-Hou
计算机学报,1998,(21):270~276,-0001,():
-1年11月30日
协作模型是CSCw系统的核心和基础。其目的是描述群体协作的方式、机制、管理、协调以及对协作过程的控制等。根据群体协同工作的方式、特点和需求,提出了基于交互、活动和协作三层结构的协作模型,并给出了交互、活动和协作的形式化定义,最后提出了一种采用“镜头焦点”和“自由交互”相结合的协作模型实现方法。本文提出的协作模型及其实现方法在分布式多媒体协同工作系统DMCS中得到实现。
计算机支持的协同工作, 协作模型, 交互, 协作
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郑庆华, ZHENG Q ing-hua, YOU Yuan-xia, YUAN Wen-bin
软件学报,2001,2(12):167~172,-0001,():
-1年11月30日
超文本是一种非结构化的文档。它虽然不支持跨页查询和全文检索,但却是Internet上信息组织与存储的重要方式。提出了一种将超文本转换为结构化数据库的算法。分析了超文本结构化转换的需求,运用图论分析并描述了超文本的转换模型与实现算法。该算法在鲁迅数字图书馆系统中得到了实际应用和验证。
数字图书馆, 超文本, 结构化, 数据库
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