Tài liệu Báo cáo khoa học: "A Feature Based Approach to Leveraging Context for Classifying Newsgroup Style Discussion Segments" pptx

... 73–76, Prague, June 2007. c 2007 Association for Computational Linguistics A Feature Based Approach to Leveraging Context for Classifying Newsgroup Style Discussion Segments Yi-Chia Wang, Mahesh ... evaluation is to contrast our proposed feature based approach with a state-of- the-art sequential learning technique (Collins, 2002). Both approaches are design...

Ngày tải lên: 20/02/2014, 12:20

... with more than one child. 3.2 Features Features for the ranking model are extracted from source syntax trees. For English -to- Japanese task, we extract features from Stanford English Depen- dency ... Performance In order to show whether the improved performance is really due to improved reordering, we would like to measure the reorder performance directly. 917 As we do not have acc...

Ngày tải lên: 19/02/2014, 19:20

... Association for Computational Linguistics A Fully Bayesian Approach to Unsupervised Part-of-Speech Tagging ∗ Sharon Goldwater Department of Linguistics Stanford University sgwater@stanford.edu Thomas ... tag dictionary to no dictionary at all. We introduce the use of a new information-theoretic criterion, varia- tion of information (Meilˇa, 2002), which can be used to compare a gold...

Ngày tải lên: 20/02/2014, 12:20

... a tool for predicting metabolic engineering strategies to optimize plant freezing toler- ance. We confirm that a significant improvement in freezing tolerance in plants involves multiple regulatory ... function. Statistics ANOVAs and t-tests were performed with matlab (Ver- sion 7.6.0.324, R2008a). Acknowledgements We would like to thank S. Stutz for fruitful discussions and for helpi...

Ngày tải lên: 14/02/2014, 22:20

... 158 · 81 · 8 bins, for an average of nearly 16 counts in each bin. When using a reduced atom repre- sentation, chemically similar atoms were group together based on the CHARM atom definition, as ... investigated whether a reduced-atom representation would not lead to improved performance in the protein–RNA case. The all-atom potential performs better than the reduced atom potential (mean...

Ngày tải lên: 18/02/2014, 16:20

... significant for moving from dev to full train set. Algorithms 2 and 3 were infeasible to run on Europarl data beyond one epoch because features vectors grew too large to be kept in memory. 6 Discussion We ... gradient vectors corresponding to feature columns. Their algorithm is itself an exten- sion of gradient -based feature selection based on the  1 norm, e.g., Perkins et...

Ngày tải lên: 19/02/2014, 19:20

... one -to- one relations but not one -to- many, many -to- one, many -to- many or null relations, all of which can occur in word alignments. We constrain the forbidden types of relation to become one -to- one, ... 2011). Thus, in a one -to- many alignment, the single source word is forced to align with the first target word; in a many -to- one alignment, monotone order is assumed for...

Ngày tải lên: 19/02/2014, 19:20

... Of Text For Information Access. Tony Mullen and Nigel Collier. 2004. Sentiment anal- ysis using support vector machines with diverse in- formation sources. In Dekang Lin and Dekai Wu, editors, ... sentiment analysis Georgios Paltoglou University of Wolverhampton Wolverhampton, United Kingdom g.paltoglou@wlv.ac.uk Mike Thelwall University of Wolverhampton Wolverhampton, United Kingdom m.thel...

Ngày tải lên: 20/02/2014, 04:20

... used one feature for each and up to three for M-Match features. The feature values vary based on matching type, i.e., exact match, containment, synonym match, etc. For example, the S-Match feature ... (n i L < 25% ∗ n L ) performance improvement is better than rest 725 % SVM gSum SSL Hybrid SVM Hybrid gSum SSL #Labeled MRR Top1 Top5 MRR Top1 Top5 MRR Top1 Top5 MRR Top1 Top5...

Ngày tải lên: 20/02/2014, 07:20

... substitution transformations, but inadequate to address the insertion transforma- tion. For example, the lingoes “duno”, “ysnite” have to be normalized using an insertion trans- formation to become ... problem as tremendous ef- fort is required to adapt the language model of the existing translation system to handle SMS text style. We offer an alter- native approach to r...

Ngày tải lên: 20/02/2014, 12:20