Analysis and extraction on temporal information of Web news under emergencies
CAI Hua-li 1,2,LIU Lu 1,LIU Zhi-ming 1,YANG Yue-xiang 2
Computer Engineering and Applications . 2010, (34): 107 -110 .  DOI: 10.3778/j.issn.1002-8331.2010.34.033