郑州大学学报（理学版）2007，Vol.39Issue(2)：55-59,5.
E-learning环境下的异步答疑系统的研究
The Research of Supporting Platform of Asynchronous Q&A for E-learning
摘要
Abstract
Aimed at the problems of great complexity of retrieval algorithms and high cost of time consumption in asynchronous question and answer(Q&A) system for E-learning, the reversal retrieval algorithm based on answers' keywords and weight values is put forward to solve it. By using this algorithm, the authors can present not only texts for learners, but also other format materials, such as audio, video and images, etc, which only needs authors to offer keywords and weights just like texts. Because learners' ability to extract keywords from natural language is limited, it will be advisable to let authors offer keywords and weights for answers. In addition, a supporting platform of asynchronous Q&A for E-learning has been designed and developed, which employs the algorithm proposed, and the operational results of platform have proved that the reversal retrieval algorithm is simple, easy to operate and runs with great efficiency and speed ,and can satisfy the requirements of retrieval answers in asynchronous Q&A system well.关键词
异步答疑/信息检索/E-learning/支持平台Key words
asynchronous Q&A/information retrieval/E-learning/supporting platform分类
信息技术与安全科学引用本文复制引用
仲兆满,李存华,管燕..E-learning环境下的异步答疑系统的研究[J].郑州大学学报（理学版）,2007,39(2):55-59,5.基金项目
国家自然科学基金资助项目,编号70371015 （）
江苏省教育厅自然科学基金资助项目,编号06KJB520005. （）
