Multi-parameters based dynamic threshold improvement of session identification was carried out.

This paper presents a method for session identification based on an analysis of intervals of user access logs.

As is true for the typical data mining goals, the issues of data quality and pre-processing are very important, it mainly involves data cleaning, user identification, session identification and path completion, at last we can measure the accuracy of the sessionizing.

Study on Cyber-language from the Perspective of Conversation Analysis;

Methodological Characteristics and Theoretical Foundationof the Conversation Analysis School;

It is intended to present an overall review of studies on code switching, focusing on sociolinguistics, syntax, psycholinguistics, pragmatics and conversational analysis.

The paper applies the conversational analysis theory to interpret the personalities of the characters in the aspects of turn distribution,length,contents,and positions of the interlocutors and change of the topics.

Then on the basis of the theory of cooperative principle and politeness principle in discourse analysis,the article conducts a detailed analysis on the main principles of teachers discourse during the process of their adjusting to the student-centered teaching model.

discourse analysis.