Zhaotao Zhou1,2, Yan Guo1, Bin Wang1, Xueqi Cheng1, Hongbo Xu1, Gang Zhang1

[摘要] This report presents CASICT’s experiments on the Mixed query task of the TREC2004 Web track. Our work focused on combining different Web page evidences together to improve theoverall retrieval performance. Four kinds of evidences, including body content(C), anchor texts (AT),basic structural information (S0) and extended structural information (S1) were considered for retrieval.Six combination functions were investigated in our experiments. The experimental results show thatmost functions can improve the retrieval performance. Some heuristic reranking techniques were alsointroduced and tested in the task. No query classification was made during the experiments.

[学科分类] 社会科学、人文和艺术（综合）