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目前E-learning环境下常用的异步答疑算法存在实现复杂、时间代价消耗高的问题,介绍了基于答案的关键字和权值进行信息检索的算法.使用此算法,教师不仅能够为学习者提供文本资料,还可以提供其他的比如视频、音频和图片等资料,教师只需要为相应的答案提供一些参考关键字和设定权值即可.因为学习者抽取答案的关键字的能力是有限的,由教师来做此工作更加合适.试验证明此算法实现容易,查找效率高,能够较好地满足E-learn-ing环境下的异步答疑的需求.
At present, the asynchronous answering algorithm commonly used in E-learning environment has the problems of complicated implementation and high time cost, and introduces an algorithm for information retrieval based on the keywords and weights of answers. Using this algorithm, teachers can not only provide texts for learners Information, but also can provide other information such as video, audio and pictures, teachers only need to provide some reference keywords for the corresponding answer and set the weight can be because the ability of learners to extract the key words of the answer is limited, It is more suitable for teachers to do this work.Experiments show that this algorithm is easy to implement and has high searching efficiency and can meet the requirements of asynchronous QA in E-learn-ing environment.