Báo cáo khoa học: "Evaluating Distributional Models of Semantics for Syntactically Invariant Inference" doc

... Chapter of the Association for Computational Linguistics, pages 33–43, Avignon, France, April 23 - 27 2012. c 2012 Association for Computational Linguistics Evaluating Distributional Models of Semantics ... does suggest that distributional models of semantics can play a more central role in systems that re- quire deep, precise inference. 2 Compositionality and Distribu...

Ngày tải lên: 17/03/2014, 22:20

... geometric mean of the number of analyses for a sentence of length n is 1.31 n . The microaveraged F 1 -score for GR extraction on held-out data from Susanne is 76.5% (see section 4.2 for details of the ... category for 85% of the Susanne treebank, a 140K word balanced subset of the Brown Cor- pus, which we have used for development (Samp- son, 1995). Much of the remain...

Ngày tải lên: 20/02/2014, 12:20

... applications of topic models. Section 3 describes the models used in our exper- iments. Section 4 provides details of the experi- mental design. Section 5 presents results for our models on the task of ... data. Latent variable models that use E M for infer- ence can be very sensitive to the number of latent variables chosen. For example, the performance of ROOTH-EM wo...

Ngày tải lên: 07/03/2014, 22:20

... states of each of the two models are unseen and must be inferred from the words. The problem of language understanding, then, is to recover the most likely meaning structure given a sequence of ... discuss 1) the problem of representing meaning in this framework, 2) the structure of the statistical model, 3) the process of training the model, and 4) the process of under...

Ngày tải lên: 08/03/2014, 07:20

... 4: Performance of multilanguage-comparability: kappa coefficient (κ) for measuring comparability of classification labels and Pearson’s correlation coefficient (ρ) for classification scores for English ... we measure the correlations be- tween the sums of P, the sums of R, and the sums of F to κ and ρ for all pairs of systems. 13 The correlations of P with κ and ρ are 0.78 a...

Ngày tải lên: 16/03/2014, 23:20

... 1994). Computational models of semantics which use symbolic logic representations (Montague, 1974) can account naturally for the meaning of phrases or sentences. Central in these models is the notion of compositionality ... achieves. As a result of the assumption of symmetry, both these models are ‘bag of words’ models and word order insensitive. Relaxing the assumptio...

Ngày tải lên: 23/03/2014, 17:20

... semantic factors are not accounted for by these models, and incorporating non-lexical as- pects of semantics into models of sentence pro- cessing is a challenge for ongoing research. Re- cently, ... developing cognitively plausible models of human language processing. Developing computational models is of scientific importance in so far as models are im- plemented theori...

Ngày tải lên: 30/03/2014, 21:20

... independent of training set size), and b) different levels of confusion among the categories. Type a) models the presence of unknown features that influence the true probabilities of an outcome: a form of ... degree of noise, the curves for ALrand and ALbias are very similar. When inserting more noise, performance for ALbias decreases, and with around 20% of biased errors i...

Ngày tải lên: 30/03/2014, 21:20

... The LDA-based models do not inherently make use of any ranking infor- mation contained in the original extractions. How- ever, such information can be incorporated in the form of a prior. The ... synset(s) for a set of gold attributes, taking into account polysemous usage. For each model, ranked lists of possible concept assignments C(w) are generated for each attribute w, usi...

Ngày tải lên: 30/03/2014, 23:20

... about the se- quence of symbols (letters or phonemes) of which each word is formed. A number of different ap- proaches have been presented for this task using exclusively distributional evidence ... (say 1000) from hundreds of millions of words. Note this is different from the common task of guessing the word category of an unknown word given a pre-existing set of parts -o...

Ngày tải lên: 31/03/2014, 20:20