RMIT at TREC 2010 Blog Track: Faceted Blog Distillation Task
Zhixin Zhou, Xiuzhen Zhang, Phil Vines · 2010
Abstract This paper reports RMIT’s participation in the TREC Blog Track 2010. For the baseline task, we adopted the BM25 model implemented in the Zettair search engine to establish a retrieval system of blog posts based on topic relevance. We then experimented with a number of different approaches to aggregate the post similarity scores to retrieve the most relevant blogs. Similarly, for the faceted distillation task we built a system at the post level first. After that, scores are aggregated for blogs to re-rank the most relevant blogs for the facet inclinations. A SVM classifier has been trained on Blog 06 collection to produce the opinion scores for each post. The cross entropy is used to evaluate posts for the in-depth versus shallow facet. For the personal versus official facet, we assumed blogs which are opinionated are also personal.