Báo cáo khoa học: "Semantic Class Learning from the Web with Hyponym Pattern Linkage Graphs" pdf

... applies hyponym patterns to the web and ac- quires contexts around them. The KnowItAll system (Etzioni et al., 2005) also uses hyponym patterns to extract class instances from the web and then evalu- ates ... doubly-anchored hyponym pattern to query the web and extract semantic class instances: CLASS NAME such as CLASS MEMBER and *. We hypothesized that a doubl...

Ngày tải lên: 17/03/2014, 02:20

... suffixes with top φ 2 In our modified version of the competitive link- ing algorithm, the link score of a pair of words is the sum of the φ 2 scores of the words themselves, their prefixes and their ... pairs, where the translation of the in-parenthesis terms is a suffix of the pre-parenthesis text. The lengths and frequency counts of the suffixes have been used...

Ngày tải lên: 17/03/2014, 02:20

... conjunctive pattern outperformed the hypernym pattern. We as- sume that the frequency of the two patterns plays an important role (the frequency of pages with the con- junctive pattern is five times the ... of the general pattern have their 166 limitations. A pattern that includes the hypernym may fail to generate enough useful information if the hypernym has many h...

Ngày tải lên: 17/03/2014, 04:20

... disambiguation performed within our framework. 3.1 Hyponym Classification Our classifier for the hypernym relation is derived from the “hypernym-only” classifier described in (Snow et al., 2005). The features ... examples. The model for predicting P (H ij |E H ij ) is then trained using logistic regression, predicting the noun-pair hypernymy label from WordNet from the featur...

Ngày tải lên: 20/02/2014, 12:20

... below. If the NP under consideration is annotated as one of the five ACE SCs in the corpus, then the classification of the associated training in- stance is simply the ACE SC value of the NP. Other- wise, ... la- beled with either one of the seven MUC-style NE types 4 or OTHERS 5 and the second entry is a com- mon noun. We then infer the SC of a common noun as follows: (1)...

Ngày tải lên: 17/03/2014, 04:20

... the integrity of the C-terminal tail extension. Since it had been confirmed that the cleavage is within the tail, we next investigated sites within the tail that are the critical targets for the ... that cross- talk to the DAPK-1 pathway. Therefore, we evaluated the homology of the ankyrin-repeat region of DAPK-1 with other genes in the human genome using the NCBI nuc...

Ngày tải lên: 18/02/2014, 17:20

... LC system, with MS analysis carried out on a Thermoquest LCQ system with an APCI source. Standards were obtained from Matreya Inc. USA, or using previously authenticated in vivo synthesized LCBs [23,24]. Acknowledgements Financial ... and other proteins involved at the biochemical level. Such a situation now exists for dis- covery of genes involved in PUFA biosynthesis follow- ing th...

Ngày tải lên: 20/02/2014, 01:20

... the number of verbs which were found in the corpus and are mem- bers of the class, over f (class) , the total number of verbs which are listed in Levin as members of the class (Total). The ... the typicality (Typ) of the semantic classes for the two alternations. (The typicality values were com- puted for the double object frame). For the dative alternation,...

Ngày tải lên: 20/02/2014, 19:20

... to the active core of the fragment, was synthesized. Both the recombinant and the synthesized peptides had the same inhibitory activity toward trypsin at a molar ratio of 1 : 1, implying that the ... we cloned the cDNA of the mung bean trypsin inhibitor, one of the most studied Bowman–Birk protease inhibitors. A modified peptide, Lys33GP, with 33 residues derived from th...

Ngày tải lên: 15/03/2014, 09:20

... reflect the faster reaction of nitrite with deoxy hemes in the R structure than in the T structure [19,20]. Thus, the reaction rate was not maximal at the start of the reaction, where the concen- tration ... sampled from the caudal vessels into heparinized syringes. Freshly drawn blood from rabbit (Oryctolagus cuniculus) was obtained from the Biomedical Laboratory, Un...

Ngày tải lên: 16/03/2014, 06:20