Tài liệu Báo cáo khoa học: "A Composite Kernel to Extract Relations between Entities with both Flat and Structured Features" ppt

... Linguistics and 44th Annual Meeting of the ACL, pages 825–832,Sydney, July 2006.c2006 Association for Computational LinguisticsA Composite Kernel to Extract Relations between Entities with both Flat ... the composite kernel and study the effective representation of a rela-tion instance. 3.1 Composite Kernel Our composite kernel consists of an entity kernel and a convolution parse tree kernel. ... to fully utilize the nice properties of kernel methods to explore diverse knowledge for relation extraction. Our study illustrates that the composite kernel can effectively capture both flat...

Tài liệu Báo cáo khoa học: "Coreference for Learning to Extract Relations: Yes, Virginia, Coreference Matters" ppt

... typically used to introduce top officials. For such cases, even without co-reference, system specific effort and tuning could potentially have improved –Coref’s ability to learn the relations. ... predicate-argument structure and em-ploy coreference. Section 3 describes our particular approach to pattern and relation instance scoring and selection. Another research strand (Chen et al., 2006 ... their studies to the small ACE corpora where mention markup is manually encoded. Most approaches to automatic pattern genera-tion have focused on precision, e.g., Ravichandran and Hovy (2002)...

Tài liệu Báo cáo khoa học: "A Practical Solution to the Problem of Automatic Word Sense Induction" doc

... dissimilarities among the top 30 associations to palm are all in the upper half of the scale and not very distinct. The two expected clusters for palm, one relating to its hand and the other to its tree ... (contexts) and then applying a clustering algorithm to the row vectors (words) of the resulting matrix. This works well since it is a strength of SVD to reduce the effects of sampling errors and to ... binary vectors since we assume short contexts where words usually occur only once. By looking at the matrix it is easy to see that contexts c1, c3, and c6 seem to relate to the hand sense...

Tài liệu Báo cáo khoa học: "A Bootstrapping Approach to Named Entity Classification Using Successive Learners" pdf

... chunks with proper name POS tags (NNP and NNPS) are extracted as NE candidates. The preceding word and the succeeding word of the NE candidates are also extracted. Then we apply the HMM to the ... the repository to train a decision list for NE classification. 3. The learned rules are applied to the NE candidates stored in the repository. 4. The proper names tagged in Step 3 and their ... 86.7% To benchmark the quality of the automatically constructed corpus (Table 2), the testing corpus is first processed by our parser and then saved into the repository. The repository level...

Tài liệu Báo cáo khoa học: "A Prototype Text to British Sign Language (BSL) Translation System" ppt

... 1995; Sutton-Spence and Woll, 1999). In the case of the former, signingspace is used to gesture towards and point at objects and persons physically present and thus has similar-ities with body ... between objects and persons which are notpresent, position within signing space can be used to denote abstract referents. Similarities between to- pographic and syntactic uses are apparent and ... of the upper torso, the orientation of the head and facial expressions. Manual features have beenoften been decomposed as hand-shape, hand orienta-tion, hand position and motion (Stokoe, 1978;...

Tài liệu Báo cáo khoa học: A comparative analysis of the time-dependent antiproliferative effects of daunorubicin and WP631 pdf

... iodide and flow cytometry. Panels D and E display aflow cytometry analysis of cells stained with Annexin-V-Fluos and propidium iodide in the presence of daunorubicin or WP631,respectively. Apoptotic ... sensitivity of cells to damaging agents, includinganthracyclines, might reflect cell death by apoptosis [18], therelationship between the efficacy of drug treatment and theinduction of apoptosis is still ... were prepared with sterile 150 mMNaCl, main-tained at )20 °C, and brought to the final concentration with RPMI 1640 medium just before use.Correspondence to J. Portugal, Departamento de Biologıá...

Tài liệu Báo cáo khoa học: "A PRAGMATICBASED APPROACH TO UNDERSTANDING" pdf

... first expected to accept the question, either implicitly or expllcltly, and then answer the question. Upon posing a question to ~P, IS is expected to expand upon this question with subsequent ... Humans perslat in using abbreviated statements and queries, even in the presence o/ explicit and repeated instructions to adhere to syntactically and semantically complete sentences (Carbonell, ... speaker wants to accomplish and the relationship of each utterance to this task. Interpretation of ellipsis based upon the speaker's inferred under~ lying task-related plan and discourse...

Tài liệu Báo cáo khoa học: "A HYBRID APPROACH TO REPRESENTATION IN THE JANUS NATURAL LANGUAGE PROCESSOR" pot

... pertains to minimizing the constants needed From the constants BLACK -ENTITIES, GRAY -ENTITIES, CATS and MICE, the operators THE, POWER, KIND, and SAMPLE are used to derive the entities corresponding ... use concepts only to represent sets of entities indexed by time and world. Roles are used only to represent sets of pairs of entities, i.e., binary relations. Given time and world indices ... inferred for full understanding of nominal compounds and metonymy. Those that can be anticipated can be built into the lexicon; the challenge is to deal with those that are novel to Janus. Finding...

Tài liệu Báo cáo khoa học: "A PROBABILISTIC APPROACH TO GRAMMATICAL ANALYSIS OF WRITTEN ENGLISH BY COMPUTER" pot

... occurs in newspapers, books and journals; and they also force issues - such as how to incorporate punctuation into the parsing scheme, how to deal with numbered lists and dates in brackets - ... word token of sample text, (3) the word tag for the word and (~) a field of hypertags and brackets showing the constituency-level status of each word token. Any amendments to the rules and ... amendments and extensions to the rules for tree drawing and the inventory of hypertags were proposed, on the basis of problems encountered by the linguist in providing a satisfactory grammatical...

Tài liệu Báo cáo khoa học: Phylogenetic relationships in class I of the superfamily of bacterial, fungal, and plant peroxidases pptx

... database and are listed in Table 1 together with their accession numbers and the organisms from which theyoriginate. The protein sequences were used to infer thephylogenetic relationships. Both ... ancestralperoxidase gene which was already adapted to APX and CCP speciﬁcity was introduced o nce into the fungalprogenitor, and all extant ascomycetous CCPs are offspringof this single gene transfer. ... theprogenitor for APX and CCP families and (b) ancestralcatalase–peroxidase. Furthermore, it acted inside both theAPX a nd catalase–p eroxidase families. The s ubsequentevent of a tandem g ene...

Xem thêm