Báo cáo khoa học: "Global Learning of Focused Entailment Graphs" docx

... term those focused entailment graphs (Section 4). In the core section of the paper, we present an algorithm that uses a global approach to learn the entailment relations of focused entailment ... now on the term entailment graph will stand for focused entailment graph. 5 Learning Entailment Graph Edges In this section we present an algorithm for learn- ing the edges o...

Ngày tải lên: 30/03/2014, 21:20

... helps disambiguate them and so the problem of ambiguity is greatly reduced. 4 Learning Typed Entailment Graphs Our learning algorithm is composed of two steps: (1) Given a set of typed predicates and their ... into (drug,drug) Figure 1: Top: A fragment of a two-types entailment graph. bottom: A fragment of a single-type entailment graph. Mapping of solid edges is direct...

Ngày tải lên: 30/03/2014, 21:20

... trivial set of entailment cases. The experiments with the data sets of the RTE 2005 challenge show an improvement of 4.4% over the state -of- the-art methods. 1 Introduction Recently, textual entailment ... Linguistics Automatic learning of textual entailments with cross-pair similarities Fabio Massimo Zanzotto DISCo University of Milano-Bicocca Milan, Italy zanzotto@disco.uni...

Ngày tải lên: 20/02/2014, 12:20

... Online Learning of Approximate Dependency Parsing Algorithms Ryan McDonald Fernando Pereira Department of Computer and Information Science University of Pennsylvania Philadelphia, ... parsing algorithm. of dependents have been gathered. T his allows for the collection of pairs of adjacent dependents in a single stage, which allows for the incorporation of second-order scores,...

Ngày tải lên: 22/02/2014, 02:20

... France emmanuel.dupoux@gmail.com Abstract Accurate unsupervised learning of phonemes of a language directly from speech is demon- strated via an algorithm for joint unsupervised learning of the topology and parameters of a hidden Markov ... im- provement in the efficacy of the SSS algorithm as described in Section 2. It is based on observing that the improvement in the goodness...

Ngày tải lên: 08/03/2014, 01:20

... indicates an improvement of 22-38% in average pre- cision over unstemmed text, and 96% of the performance of the proprietary stem- mer above. 1 Introduction Stemming is the process of normalizing word ... two examples use the joint probability of the prefix and suffix, with a smoothing back-off (the product of the individual probabilities). Scor- ing models of this form proved to...

Ngày tải lên: 08/03/2014, 04:22

... Department University of Rochester Rochester, NY 14627 zhanghao@cs.rochester.edu Chris Quirk Microsoft Research One Microsoft Way Redmond, WA 98052 USA chrisq@microsoft.com Robert C. Moore Microsoft Research One ... regimen of 5 it- erations of Model 1, 5 iterations of HMM, and 5 iterations of Model 4. We computed Chinese-to- English and English-to-Chinese word translation ta- bles...

Ngày tải lên: 17/03/2014, 02:20

... the performance of that grammar to that of a heuristically pruned “minimal subset” of it. The latter’s performance was quite good, achiev- ing 90.8% F 1 score 1 on section 23 of the WSJ. This ... Grammar Matt Post and Daniel Gildea Department of Computer Science University of Rochester Rochester, NY 14627 Abstract Tree substitution grammars (TSGs) of- fer many advantages over co...

Ngày tải lên: 17/03/2014, 02:20

... Unsupervised Learning of Dependency Structure for Language Modeling Jianfeng Gao Microsoft Research, Asia 49 Zhichun Road, Haidian District Beijing 100080 China jfgao@microsoft.com Hisami ... the number of pa- rameters of the combined model manageable. To overcome the second obstacle, we used an unsu- pervised learning method that discovers the de- pendency structure of a g...

Ngày tải lên: 17/03/2014, 06:20

... good choice of values for ψ and φ for parsing. 9 Proofs This section gives proofs of theorems 1 and 2. Due to space limitations we cannot give full proofs; in- stead we provide proofs of some key ... the conven- tional form of the inside-outside algorithm. The proof is by induction, and is similar to the proof of lemma 2; for reasons of space it is omitted. 9.2 Proof of the Iden...

Ngày tải lên: 23/03/2014, 14:20