Báo cáo khoa học: "Attention Shifting for Parsing Speech ∗" pdf

... Johnson, 2003). Language modeling for speech could well be the first real problem for which syntactic techniques are useful. John ate the pizza on a plate with a fork . NP:plate NP:fork PP:withPP:on IN IN VB NP VP:ate Figure ... Edges for Unused Words Is Agenda Empty? no Continue Multi-stage Parsing yes PCFG Word-lattice Parser Figure 5: Attention shifting parser. Figure 5 depict...

Ngày tải lên: 17/03/2014, 06:20

... of log- linear models for defining probability distributions over the parses of a unification grammar. Un- fortunately, the maximum likelihood estimator Ab- ney proposed for SUBGs seems computationally ... Proceedings of the 40th Annual Meeting of the Association for pus. For most linguistically realistic grammars this set is finite, and for moderate sized grammars and training corpora...

Ngày tải lên: 31/03/2014, 06:20

... kernel for phrase grammar parse trees and for depen- dency parse trees outperforms all known tree kernel approaches alone suggesting that both types of trees contain comple- mentary information for ... dependency parse tree kernel outperforms all others by 5.7% F-Measure reaching an F-Measure of 71.2%. This result shows that both types of parse trees contain relevant information for r...

Ngày tải lên: 20/02/2014, 09:20

... Analysis To use the DOP method not just for syntactic anal- ysis, but also for semantic interpretation, four steps must be taken: 1. decide on a formalism for representing the meanings of sentences ... enough for repre- senting the meanings of sentences and constituents that are relevant for the intended application do- main. For our exposition in this paper we will use a...

Ngày tải lên: 22/02/2014, 03:20

... using some information of parsing re- sults. However, as the approach runs somewhat in a reverse direction to ours, we omit it from the dis- cussion. Hence, this paper will seek for the meth- ods ... sentence, f denotes a foreign sentence, and S X denotes cumulative X-gram scores. For 3- gram scores, the tendency to separate in two clus- ters is slightly decreased. Furthermore, for 1-...

Ngày tải lên: 08/03/2014, 01:20

... "dictionary" for the LSP. This dictionary need only contain part- of -speech information for all the words that will be used in definitions; other information such as part- of -speech subclass ... decide whether to modify the entry for that sense or create a new entry for a new sense. 3. Part of speech, or "class." Our classification of parts of spee...

Ngày tải lên: 08/03/2014, 18:20

... measures. Using the addition rule for probabilities we get the following formula for a disjunction of two clues: P(ai U a2) = P(ai) P(a2) — P(al n a2) For simplicity, we assume that clues ... phrase type labels bear much less information about spe- cific words and phrases than POS tags, therefore, a lower weight of 0.1 was chosen for these two clues. 5.2 The results For the eva...

Ngày tải lên: 08/03/2014, 21:20

... goto function for LR(0) parsing is defined by goto(q,x) = closure({[A * aX •/3] I [A ~ a • X/3] E Q}) For ELR parsing however, we need two goto func- tions, goto I and goto2, one for kernel ... tabular form of CP parsing, since this is the most simple parsing technique discussed above. We will then move on to the more difficult ELR technique. Tabular PLR parsing is fairly...

Ngày tải lên: 17/03/2014, 09:20

... printing devices, then the above transformation is effected by a single- state machine. A word -for- word translation in which the equivalents selected for an input word depend upon the context ... transforma- tion, called "conditional" is effected by the rules: A Model for MT 3 where r = 1, 2 We suppose that the sequence of rules provides a course of action fo...

Ngày tải lên: 30/03/2014, 17:20

... Association for Computational Linguistics, pages 497–505, Jeju, Republic of Korea, 8-14 July 2012. c 2012 Association for Computational Linguistics Dependency Hashing for n-best CCG Parsing Dominick ... supertagging, on parsing accuracy. 1 Introduction Reranking techniques are commonly used for im- proving the accuracy of parsing (Charniak and John- son, 2005). Efficient decodin...

Ngày tải lên: 19/02/2014, 19:20