Báo cáo khoa học: "Data point selection for cross-language adaptation of dependency parsers" pot

... for Computational Linguistics Data point selection for cross-language adaptation of dependency parsers Anders Søgaard Center for Language Technology University of Copenhagen Njalsgade 142, DK-2300 ... cross- language adaptation of dependency parsers. 3 Experiments 3.1 Data point selection The key idea in our experiments is that we can use a simple form of insta...

Ngày tải lên: 17/03/2014, 00:20

... Identification of 20,23-dihydroxyvitamin D3. (A) Expansion of proton–proton COSY correlations for 3-CH and 23-CH; (B) expan- sion of proton–proton TOCSY correlations for 3-CH and 23-CH; (C) expansion of ... above. Preparation of minor products to test as substrates for P450scc Minor metabolites of vitamin D3 were purified from 50 mL incubations of 100 lm vitamin D3 with 2 lm...

Ngày tải lên: 18/02/2014, 17:20

... terms of efficiency of communication. 2 Principles of Content Selection in the Real Time Discourse 2.1 Maximization of Total Information A discourse is most effective when the amount of information ... and are often too detailed to be used as comments. MIKE therefore uses forward chaining rules of the form precedents , antecedents to draw further inferences. The types...

Ngày tải lên: 20/02/2014, 18:20

... length of a in terms of number of words, f(a) the frequency of a in the corpus, Ta the set of candidate terms that contain a, P(T~) the number of these candidate terms. At this point the ... information gained from the textual context of the candidate term. 2 Context information for terms The idea of incorporating context information for term extraction came f...

Ngày tải lên: 22/02/2014, 03:20

... even a slight perturbation of the conformation of MscL, for example due to the absence of YidC, might hinder access of AMS to position 68, thus minimizing derivatization of the MscL subunits. In ... [13], depletion of YidC had no major effect on the insertion of MscL, but formation of the pentamer was almost completely abolished under these conditions, suggest- ing a novel r...

Ngày tải lên: 07/03/2014, 02:20

... spot the translations of the strongly collocated context. Second, the association-based translation spotting tends to spot the common subsequence of a set of similar translations instead of ... 0.91 Table 2. Evaluation of the translation spotting for each term 3.3 Evaluation of Ranking To evaluate the performance of a ranking function, we ranked the retrieved sentences...

Ngày tải lên: 07/03/2014, 18:20

... thought of as a measure of the impor- tance of the phrase in a smaller coherent seg- ment of the document. 3.3 Syntactic Features Previous work has pointed out the importance of syntactic features for ... vo- cabulary of plausible keyphrases, usually in the form of a list of subject headings or a domain specific thesaurus. The use of a vocabulary has the addi- tional benefit...

Ngày tải lên: 08/03/2014, 01:20

... union of the cohesion constraint and the weaker ITG constraints (Cherry and Lin, 2006). Transforming this form of the cohesion con- straint into a soft constraint is straight-forward. Instead of ... value of −∞ before parsing begins. The result is that no constituent is ever constructed with any of these invalid spans. In thecase of phrasal cohesion, the invalid spans correspond t...

Ngày tải lên: 08/03/2014, 02:21

... Proceedings of the 45th Annual Meeting of the Association of Computational Linguistics, pages 856–863, Prague, Czech Republic, June 2007. c 2007 Association for Computational Linguistics Pivot ... degrade the performance of statistical translation systems. To solve this problem, this paper proposes a novel method for phrase-based SMT by using a pivot language. To perform tran...

Ngày tải lên: 08/03/2014, 02:21

... analysis and geolocation of events based on Twitter. Our system consists of the following steps: (1) user selection of key- words for querying Twitter; (2) preprocessing of the returned queries ... takeoff in mobile de- vices and widespread support for social media across a range of devices, have been significant contributors to the popularity and utility of social media. Whi...

Ngày tải lên: 08/03/2014, 21:20