Báo cáo khoa học: "Extracting Relations with Integrated Information Using Kernel Methods" pot

... June 2005. c 2005 Association for Computational Linguistics Extracting Relations with Integrated Information Using Kernel Methods Shubin Zhao Ralph Grishman Department of Computer Science ... entity relations, in which syntactic information from sentence tokenization, parsing and deep dependency analysis is combined using kernel methods. At each level, kernel f...

Ngày tải lên: 31/03/2014, 03:20

... corpus (approx. 1 ×10 11 words). Without a corpus nor a thesaurus (but with glosses in a dictionary), we obtained accuracy that is compa- rable to Turney and Littman’s with a medium-sized corpus. ... To calculate the association strength of a word with pos- itive (negative) seed words, they used the number of hits returned by a search engine, with a query consisting of the word and on...

Ngày tải lên: 20/02/2014, 15:20

... between the named entities. Our experiments using one year of newspapers re- veals not only that the relations among named enti- ties could be detected with high recall and precision, but also that ... necessary information. If many rela- tions such as “Company A merged with Company B” embedded in those documents could be gathered and structured automatically, it would be very useful...

Ngày tải lên: 17/03/2014, 06:20

... criteria. It is our hypothesis that proliferation of roles is a natural phenomenon caused by the specialized proper- ties required by the interpretation of a predicate within a specific semantic ... Most of the definitions have been based on the referential properties that can be associated with each role bearer (e.g. an AGENT is a volitional animate entity). Even if this approach is...

Ngày tải lên: 17/03/2014, 08:20

... capture semantic information would be useful, particularly if they could be achieved with a ”semantic kernel (Cristianini et al., 2001) , which computes the simi- larity between texts by also considering relations ... much as about 30% over word-frequency cosine similarity with our methods, which shows Fisher kernel sim- ilarity measure ,with latent topic information added by L...

Ngày tải lên: 23/03/2014, 17:20

... production with the start cat- egory S on the left hand side. The rhs(f, l) function returns the constituent with index l of function f. In the PREDICT rule, for each active item with dot be- fore ... The Idea Although PMCFG is not context-free it can be approx- imated with an overgenerating context-free grammar. The problem with this approach is that the parser pro- duces many spur...

Ngày tải lên: 31/03/2014, 20:20

... somewhat with time. To recon- struct that context, we temporally rank emails that share at least one participant with e m in a time pe- riod around e m and then expand each by its thread (with duplicate ... collections offer greater scope for assembling evidence to help with that task, but they pose addi- tional challenges as well. With well over 100,000 unique email addresses in th...

Ngày tải lên: 08/03/2014, 01:20

... w with which a classifier will oper- ate. In the window, each word around w is codi- fied with a set of primitive features, together with its relative position to w. Each primitive feature with ... manually com- pleted, with an estimated cost of about 10 person hours of a bilingual speaker (7.2 sec/word). Note that translations are made with no context infor- mation, and with no...

Ngày tải lên: 17/03/2014, 22:20

... and 4, with VB turned on for Model 1) on different amounts of data. We found that the results for larger data sizes were comparable to the results for ten thousand sentence pairs, both with and without ... each language pair. We ran three experiments, one with VB turned on for all models, one with VB turned on for Model 1 only, and one (the baseline) with VB turned off for all model...

Ngày tải lên: 23/03/2014, 14:20

... the 1.6 test set was achieved with the SCORE voting, without sharing or ranking penalties. The extracted synonyms are filtered before contribut- ing to the vote with their supersense(s). This ... proportion of their vocabu- lary does not overlap with everyday vocabulary. Bur- gun and Bodenreider (2001) compared an alignment of WORDNET with the UMLS medical resource and found only a ver...

Ngày tải lên: 31/03/2014, 03:20