TY - GEN
T1 - Term weighting schemes for emerging event detection
AU - Rao, Yanghui
AU - Li, Qing
PY - 2012/12/1
Y1 - 2012/12/1
N2 - As an event-based task, Emerging Event Detection (EED) faces the problems of multiple events on the same subject and the evolution of events. Current term weighting schemes for EED exploiting Named Entity, temporal information and Topic Modeling all have their limited utility. In this paper, a new term weighting scheme, which models the sparse aspect, global weight and local weight of each story, is proposed. Then, an unsupervised algorithm based on the new scheme is applied to EED. We evaluate our approach on two datasets from TDT5, and compare it with TFIDF and existing two schemes exploiting Topic Modeling. Experiments on Retrospective and On-line EED show that our scheme yields better results.
AB - As an event-based task, Emerging Event Detection (EED) faces the problems of multiple events on the same subject and the evolution of events. Current term weighting schemes for EED exploiting Named Entity, temporal information and Topic Modeling all have their limited utility. In this paper, a new term weighting scheme, which models the sparse aspect, global weight and local weight of each story, is proposed. Then, an unsupervised algorithm based on the new scheme is applied to EED. We evaluate our approach on two datasets from TDT5, and compare it with TFIDF and existing two schemes exploiting Topic Modeling. Experiments on Retrospective and On-line EED show that our scheme yields better results.
KW - emerging event detection
KW - latent dirichlet allocation
KW - polysemous
KW - synonymous
UR - http://www.scopus.com/inward/record.url?scp=84878471312&partnerID=8YFLogxK
U2 - 10.1109/WI-IAT.2012.66
DO - 10.1109/WI-IAT.2012.66
M3 - Conference article published in proceeding or book
AN - SCOPUS:84878471312
SN - 9780769548807
T3 - Proceedings - 2012 IEEE/WIC/ACM International Conference on Web Intelligence, WI 2012
SP - 105
EP - 112
BT - Proceedings - 2012 IEEE/WIC/ACM International Conference on Web Intelligence, WI 2012
T2 - 2012 IEEE/WIC/ACM International Conference on Web Intelligence, WI 2012
Y2 - 4 December 2012 through 7 December 2012
ER -