Báo cáo khoa học: "FINITE-STATE APPROXIMATION OF PHRASE STRUCTURE GRAMMARS" pdf

... realization of suggestions of Church and Patil (1980; 1982) on algebraic simplifications of CFGs of regular lan- guages. Other work on finite state approximations of phrase structure grammars ... would do, but of course this language model is useless. One pos- sible criterion for "goodness" of approximation arises from the observation that many interest- in...

Ngày tải lên: 08/03/2014, 07:20

... sentence pair consists of two word sequences, e and f. A set of phrases {e ij } contains all spans e ij from between-word positions i to j of e. A link is an aligned pair of phrases, denoted (e ij , ... Introduction Learning in phrase alignment models generally re- quires computing either Viterbi phrase alignments or expectations of alignment links. For some re- stricted combina...

Ngày tải lên: 23/03/2014, 17:20

... membranes, and thus the lack of a specific molecular microbial target minimizes resistance development. The fundamental principle of action of most peptides depends on the ability of these molecules to ... antibacterial? If so, may our knowledge of the vast amount of heparin-binding motifs be utilized for effective de novo synthesis of AMPs, or for the identification and purificati...

Ngày tải lên: 07/03/2014, 15:20

... guessed for distinct (occurrences of) productions are trans- ported to distinct (occurrences of) terminal produc- tions [cf. Section 3 of (Potthoff and Thomas, 1993) and page 346 of (Hoogeboom and ten Pas, ... argumentation). Instead of taking the lexicographically smallest element of pos N (r) or pos ∆ (r) in the previous proof, we can take any fixed element of that set. In the de...

Ngày tải lên: 07/03/2014, 18:20

... components (like the manner of an event) at any time. Syntactic structures mirror semantic structures. They also consist of units and the name of units are shared with semantic structures so that cross- reference ... Lexical rules link parts of semantic structure with parts of syntactic structure. All rules are reversable. When producing, the left side of a rule is matched aga...

Ngày tải lên: 17/03/2014, 06:20

... Learning of Dependency Structure for Language Modeling Jianfeng Gao Microsoft Research, Asia 49 Zhichun Road, Haidian District Beijing 100080 China jfgao@microsoft.com Hisami Suzuki Microsoft ... Examples of dependency structure. (a) A dependency structure of an English sentence. Square brackets indicate base NPs; underlined words are the headwords. (b) A Japanese equival...

Ngày tải lên: 17/03/2014, 06:20

... An Incremental Connectionist Phrase Structure Parser James Henderson* U. of Pennsylvania, Dept of Computer and Information Science 200 South 33rd Philadelphia, ... a wide variety of grammatical investigations 2. This combination gives a theory of hu- man syntactic processing which spans from the level of linguistic theory to the level of neuron computations. ... ties a...

Ngày tải lên: 23/03/2014, 20:20

... some of the issues involved in deriving formal lexi- cal data from a natural-language dictionary. 1 Introduction The goal of the project is to enhance the database of the Oxford Dictionary of ... words. Entry structure and defining style, while mostly conforming broadly to a small set of basic patterns and formulae, may often be more concerned with detail and accuracy than with s...

Ngày tải lên: 24/03/2014, 03:20

... classify 65.76% of adjectives, 71.39% of nouns and 52.84% of verbs. Future work will explore the use of the contextual information of the unknown words and the contex- tual information of the lexicons ... evaluation, any one of the categories of an am- biguous word is considered correct. 5.2 Result On the test set, the baseline predicts 53.50% of adjectives, 70.84% of...

Ngày tải lên: 31/03/2014, 03:20

... Identification of Non-compositional Phrases Dekang Lin Department of Computer Science University of Manitoba and Winnipeg, Manitoba, Canada, R3T 2N2 lindek@cs.umanitoba.ca UMIACS University of Maryland ... compositional phrases and non- compositional ones is to check the existence and mu- tual information values of phrases obtained by sub- stituting one of the words wit...

Ngày tải lên: 31/03/2014, 04:20