Báo cáo khoa học: "Complementing Word Net with Roget''''''''s and Corpus-based Thesauri for Information Retrieval" pdf

... Proceedings of EACL '99 Complementing WordNet with Roget's and Corpus-based Thesauri for Information Retrieval Rila Mandala, Takenobu Tokunaga and Hozumi Tanaka Abstract This paper ... drawbacks of WordNet when applied to information retrieval by com- plementing it with Roget's thesaurus and corpus-derived thesauri. Words and rela- tions which are...

Ngày tải lên: 31/03/2014, 21:20

... not be distinguished using only bag-of-words information, and their difference lies in syntactic information held by features. For example, the third sense and the sixth sense of “in- terest” may ... But there is some differences for verb “serve” and noun “line”. For Table 3: Mutual information between feature subset and class label with χ 2 based feature ranking. Word...

Ngày tải lên: 20/02/2014, 16:20

... with TF IDF, BM25, and DLH; (ii) 30/5 with PL2; and (iii) 10/5 with BB2. For the WT10G col- lection, the said ratio is (i) 10/5 for TF IDF; (ii) 20/5 for BM25 and DLH; and (iii) 5/5 for PL2 and BB2. We ... parameters, namely, for the TF IDF and BM25 weighting schemes (Robertson et al., 1995), , , and for both test collec- tions; while for the PL2 and BB2 te...

Ngày tải lên: 08/03/2014, 02:21

... many-to-one word alignments, where each source word is aligned with zero or one target words, and therefore each target word can be aligned with many source words. Each source word is labelled with ... source and target sentences with Tree- Tagger. 2 We created indicator features over the POS tags of each candidate source and target word pair, as well as over the sourc...

Ngày tải lên: 20/02/2014, 11:21

... Collins, and T. Darrell. 2004. Condi- tional random fields for object recognition. In NIPS 17. H. Setiawan, C. Dyer, and P. Resnik. 2010. Discrimina- tive word alignment with a function word reordering model. ... be- tween pairs of source and target word types across sentence pairs (Dice, 1945), IBM Model 1 forward and reverse probabilities, and the geometric mean of the Mo...

Ngày tải lên: 17/03/2014, 00:20

... productions X → e, f, where e and f are an aligned English and for- eign word pair (possibly with one being null); normal binary rules X → X (L) X (R) , where the English and foreign spans are constructed ... s i and s j represent English null and foreign null poten- tials, respectively. We evaluate our proposed alignments (a) against hand-annotated alignments, which are m...

Ngày tải lên: 17/03/2014, 01:20

... thematic relation for information retrieval. 1. Introduction Related word sets are useful linguistic resources for language understanding and generation, infor- mation retrieval, and so on. In ... among related words: taxonomical relations and thematic relations. Both relations identify related words useful to language under- standing and generation, information re- tr...

Ngày tải lên: 17/03/2014, 04:20

... only local context and one represen- tation per word. This is problematic because words are often polysemous and global con- text can also provide useful information for learning word meanings. We ... new neural network architecture which 1) learns word embeddings that better capture the se- mantics of words by incorporating both local and global document context, and 2) acco...

Ngày tải lên: 19/02/2014, 19:20

... 2. Principle 2.1. Mutual information and difference of t-score between characters Mutual information and t-score, two important concepts in information theory and statistics, have been ... segmentation is therefore the first step for any Chinese information processing system[ 1]. Almost all methods for Chinese word segmentation developed so far, both statistical...

Ngày tải lên: 20/02/2014, 18:20

... atoms and the iron was 1.74 A ˚ for both NMNorsal and Norsal and 1.72 A ˚ for NMSal, compared to 1.71 A ˚ for DA (Table 1). The oxygen atoms were placed opposite the e nitrogen atoms of His331 and ... alternative ligand placements according to the energy score of each conformation, and determined interaction energies for the 20 energetically most favorable conformations. To...

Ngày tải lên: 07/03/2014, 05:20