Báo cáo khoa học: "An Improved Extraction Pattern Representation Model for Automatic IE Pattern Acquisition" ppt

... Subtree model Our research on improved representation models for extraction patterns is motivated by the limitations of the prior extraction pattern representations. In this section, we review two ... An Improved Extraction Pattern Representation Model for Automatic IE Pattern Acquisition Kiyoshi Sudo, Satoshi Sekine, and Ralph Grishman Department of Computer S...

Ngày tải lên: 23/03/2014, 19:20

... pages 409–416, Sydney, July 2006. c 2006 Association for Computational Linguistics An Improved Redundancy Elimination Algorithm for Underspecified Representations Alexander Koller and Stefan Thater Dept. ... underspecified chart representations, which can be computed from dominance graphs (or USRs in some other underspecification for- malisms) efficiently (Koller and Thater, 2005b). We e...

Ngày tải lên: 20/02/2014, 12:20

... algorithms. The DOP model has also been tested as a model for human sentence processing (Bod 2000d). This paper presents ongoing work on DOP models for Lexical-Functional Grammar representations, ... An Improved Parser for Data-Oriented Lexical-Functional Analysis Rens Bod Informatics Research Institute, University of Leeds, Leeds LS2 9JT, UK, & Institute for Logic, Language...

Ngày tải lên: 20/02/2014, 18:20

... only one transforma- tion and applying it only once. A special feature of our transformational system is the automatic allowance for dialogue diexis. An expected parse path for the answer ... side ef a transformation is a pattern which constructs an expected path. The form of the pattern en the right-hand side is a list of references to states, arcs, and lexical entries. S...

Ngày tải lên: 08/03/2014, 18:20

... good language model would obviate the need for a good error model. In Figure 2, we applied the trigram model to resort the 5-best results of the CG model. We see that while a language model improves ... components: a source model and a channel model. Very little research has gone into improving the channel model for spelling correction. This paper describes a new channel mod...

Ngày tải lên: 23/03/2014, 19:20

... sufficiently accu- rate for single-trial operation in general, and existing systems utilize many-trial schemes to achieve accuracy at the cost of speed. Hence incorporation of a language model ... allows for auditory rather than visual scanning, for use by the visually impaired or when visual access is inconvenient, such as in face-to-face communication. Auditory scanning is less strai...

Ngày tải lên: 20/02/2014, 05:20

... important for many NLP applications such as informa- tion retrieval, automatic text classification, and information extraction. Most of the previous Korean noun extraction systems use a morphological ... value such as for an unseen event in the training data. Table 1: Examples of syllable tagging by BI, BIS, IE, and IES representation schemes surface level lexical level BI BIS IE...

Ngày tải lên: 17/03/2014, 06:20

... therefore seek more "brute force" methods to improve automatically ex tracted hierarchies. One of the most promising strategies for refining extracted information is the Use of information ... dictionaries. Hierarchies derived from individual dictionaries suffer from incompleteness, but it is extremely unlikely that the same information is consistently missing from all dict...

Ngày tải lên: 24/03/2014, 05:21

... question of whether the SDRT formalisation used for discourse structure should also capture the ambiguities, as expressed in (1), for instance, via an underspec- ified representation. Section 3 ... introduced by under- specified semantic formalisms which have been pro- posed in recent years (e.g. (Reyle, 1995)) in order to provide an underspecified representation for dis- cou...

Ngày tải lên: 31/03/2014, 04:20

... Pereira and Warren (1983) and Shieber (1985) present v6rsions of Earley's algorithm for unification grammars, in which unification is the sole operation responsible for attribute evaluation. ... need for restrictions on the context-free base. Finally, a conclusion and note on implementation are given. 2. Notation and Preliminaries We follow the usual notation and terminology...

Ngày tải lên: 01/04/2014, 00:20