A New Method for Sentiment Classification in Text Retrieval Yi Hu author Jianyong Duan author Xiaoming Chen author Bingzhen Pei author Ruzhan Lu author 2005 text Second International Joint Conference on Natural Language Processing: Full Papers conference publication hu-etal-2005-new 10.1007/11562214_1 https://aclanthology.org/I05-1001/ 2005