THUIR at TREC 2008: Blog Track

This is the second time we participate in TREC Blog Track. There are three main tasks in the track, relevant finding task, opinion finding task and polarity task. In this year, we use multi-field relevance ranking in relevant finding task; and in opinion finding task, we focused on the combination of relevance score and opinionate score use a unified generation model; in polarity task, we develop two new methods to find out positive and negative blogs.