Báo cáo khoa học: "Structured Models for Fine-to-Coarse Sentiment Analysis" pdf

... 432–439, Prague, Czech Republic, June 2007. c 2007 Association for Computational Linguistics Structured Models for Fine-to-Coarse Sentiment Analysis Ryan McDonald ∗ Kerry Hannan Tyler Neylon Mike ... to determine the sentiment flow of authors in reviews. Here we show that fine-to-coarse models of senti- ment can often be reduced to the sequential case. Cascaded models for fine...

Ngày tải lên: 08/03/2014, 02:21

... Meeting of the Association for Computational Linguistics, pages 115–119, Jeju, Republic of Korea, 8-14 July 2012. c 2012 Association for Computational Linguistics Topic Models for Dynamic Translation ... unseen for a given domain s, we are already performing an implicit form of smoothing (when computing the expected counts), since each docu- ment has a distribution over all topics,...

Ngày tải lên: 19/02/2014, 19:20

... for the experiments reported here is the same as the one used for other experiments reported in this paper. The results in Table 3 illustrate how the language model performs reasonably well for ... search- ing for the optimal solution among all possible permu- tations computationally intractable. Therefore, SMT decoders typically limit the number of permutations considered for effici...

Ngày tải lên: 08/03/2014, 02:21

... of the Association for Computational Linguistics, pages 316–324, Uppsala, Sweden, 11-16 July 2010. c 2010 Association for Computational Linguistics Discriminative Pruning for Discriminative ... ITG. For instance, there are two parses for three consecutive word pairs, viz. [/ [/ / ] ] and [[/ /] /] . The problem of re- dundancy is fixed by adopting ITG normal for...

Ngày tải lên: 20/02/2014, 04:20

... bracketing for a given noun sequence, known to form a compound noun, without knowledge of the context. E.G.: (pottery (coffee mug)); ((coffee mug) holder) Corpus Statistics: The need for wide ... ordered pair of thesaurus categories (ti, t2) using the formula below. CA(t1, t2) is the mutual information between the categories, weighted for ambiguity. It measures the degree to wh...

Ngày tải lên: 08/03/2014, 07:20

... tasks. We prove that the semiring allows for exact en- coding of backoff models with epsilon tran- sitions. This allows for off-line optimization of exact models represented as large weighted finite-state ... con- vert those models to the T, T  semiring. For these automata, we simply use a default transformation such that every transition with weight c is assigned weight 0, c....

Ngày tải lên: 20/02/2014, 04:20

... known method for estimating N-gram language models. Kneser-Ney smoothing, however, requires nonstandard N-gram counts for the lower- order models used to smooth the highest- order model. For some ... 1998), and they use a different way of computing N-gram counts for all the lower-order models used for smooth- ing. For these lower-order models, the actual cor- pus counts C(w...

Ngày tải lên: 20/02/2014, 09:20

... Association for Computational Linguistics, pages 495–503, Uppsala, Sweden, 11-16 July 2010. c 2010 Association for Computational Linguistics Minimized models and grammar-informed initialization for ... uniform transition distributions. We refer to a model learned from basic EM (uni- formly initialized) as EM, and to a model with grammar-informed initialization as EM GI . 4 Minimized...

Ngày tải lên: 07/03/2014, 22:20

... finding all for a given is . Therefore, the total cost is . For all non-empty , we create a new state and for all we set . We create a transition , and for all such that , we set . For all such ... with other in- formation sources to rank alternative hypotheses by as- signing them some probabilities. There are classical techniques for constructing language models such as - gram...

Ngày tải lên: 08/03/2014, 04:22

... the patient has options for ‘survival’ that they did not have before, even though they are dependent on ‘life support’. There are now variables Commentary Medical treatment for the terminally ill: ... to accept the pie in the sky bye and bye long shot cure’. If the patient can just be maintained comfortably for long enough, then a cure may eventually become possible. 3. Surrogates disli...

Ngày tải lên: 25/10/2012, 10:45