Information retrieval and evaluation system facing chinese question answering

An Information Retrieval(IR) system is established to solve the validation of relevant documents in Question Answering for Chinese Question Answering and the related NTCIR-7 meeting is introduced in this paper.The system optimizes the query by question type of Question Answering to improve the quality during document retrieval.In the dependent evaluation of IR,the mean average precision is 0.5013;In the Question Answering evaluation,the F3 score is 0.2231.sounds a good performance in Question Answering.