中文摘要：

研究不同教学风格的特征差异，实现教师教学风格的科学测量，对于远程教育中个性化服务具有重要意义。目前，教师教学风格的测量主要是通过观察归纳和测量量表两种方法，这两种方法都无法适应远程教育对教学风格判定的需求，迫切需要一种新的定量分析方法研究教学风格的建模和测量。针对这一问题，文章首先提出了一套面向多媒体课堂的话语分析编码系统，然后利用该编码系统从话语类型、话轮转换和话语词汇三个方面研究了不同教学风格的课堂话语特征。分析结果表明，不同教学风格的教师在课堂话语类型和话轮转换方面具有较大的差异，而在话语词汇方面则没有明显的区别。最后，文章探讨了一种基于课堂话语特征的教师教学风格建模与估测方法。

英文摘要：

It is significant to discover the discourse characters for different teaching styles and measure the teachers＇ teaching styles scientifically. Currently, the major methods to measure teacher＇s teaching style are observation induction and teaching style scales, but they are not appropriate for the necessary of e-learning. Therefore, it is necessary to develop a new quantitative method to study the recognition of different teaching styles. According to these, this paper first proposed an interactive analysis system oriented to multimedia classroom, and then we use the system to study the discourse characteristics of different teaching styles in three respects： discourse types, turn distribution and vocabulary use. The study results show that the distributions of discourses and turns have great differences for different teaching styles, but there is no obvious difference in the use of vocabulary. Finally, we try to use the discovered discourse characteristics to model and predict teachers＇ teaching styles automatically.