Báo cáo khoa học: "Sparse Information Extraction: Unsupervised Language Models to the Rescue" pptx

... is to employ an n-gram-based language model to assess whether the extracted arguments share the appropriate relation. Again, this information is not given to the system, so REALM compares the ... to locating the proper nouns in the corpus, LEX also concatenates each multi-token proper noun (e.g.,Los Angeles) together into a single token. Both of REALM’s components cons...

Ngày tải lên: 31/03/2014, 01:20

... difficult to incorporate the N-best strategy by either simply combining the scores of the first pass and the second pass, or using the scores of the second pass to do re-ranking to select the best ... all unknown words to one token _UNK_ and then used a held-out data to train the bi-gram models where unknown words occur. They also applied a back-off strategy t...

Ngày tải lên: 20/02/2014, 15:20

... This way, the user can, while reading a text, immediately link up textual information to the Internet or to any other docu- ment base without accessing a search engine. The quality of the link ... Further- more, coreferences serve as a means of information transport into the output description on the RHS of the rule. Finally, the choice of feature structures as prim...

Ngày tải lên: 20/02/2014, 16:20

... most common, because the word is used in too many other ways. When there are multiple matches to the primary entity in a sentence, the matcher picks the one which is closest to the matched infobox ... first identifies the type of the entity (e.g., “city” for “Ithaca”), then instantiates the pattern to create the string the city.” Since the first sentence of most Wikipe...

Ngày tải lên: 23/03/2014, 16:20

... substitution; MS ⁄ MS will then show the substituent positions of dif- ferent isomers. A problem for MS ⁄ MS of either the peptides for the bottom-up approach or of the proteins for the top-down approach ... Huntington’s disease, and 4-halohydroxyanthranilates have been found to be specific and potent HAD inhibitors. To check for covalent modifications of the enzyme, the effec...

Ngày tải lên: 18/02/2014, 16:20

... suggested to play an important role in determining the sensitivity of tumor cells to chemo- therapy and is linked to activation of the phosphatidylinositol-3-kinase/Akt (PI3K/Akt) pathway. In the present ... mechanisms operating at various steps in the cytotoxic activity of the drug, from a decrease of drug accumulation in the cell to abrogation of apoptosis induced by th...

Ngày tải lên: 07/03/2014, 03:20

... specific topic than the current query. The user proceeds in the exploration of the document set by selecting spe- cific documents (to read them) or by selecting spe- cific facets, to refine the result ... are defined as the roots of the DAG. As a starting point, only the roots of the DAG are displayed to the user. Figure 4 shows the five roots for the ‘asthma’ query. Ex...

Ngày tải lên: 07/03/2014, 18:20

... has been largely punctuated by the development of original models of research. At the end of the 1980s, the chimpanzee model led to cloning of the viral genome and the definition of infectious molecular ... Researchers replaced the region that encodes the core to p7 with the coding sequence of the neomycin-resistance gene and the heterologous IRES of the encephalo...

Ngày tải lên: 16/03/2014, 05:20

... enhanced at the site of infection [2] leading to the formation of highly reactive species, such as peroxynitrite (ONOO – [3]), all of which are cytotoxic towards the invading microbes. As a strategy to ... proximity to the Fe-Fe site of the other monomer. It is therefore likely, though not proven yet, that the dimer is the functional unit of this enzyme, ensuring fast elec...

Ngày tải lên: 16/03/2014, 11:20

... been suggested to exert a photoprotec- tive function or to render the internal light spectrum favorable for zooxanthellae photosynthesis [28–31]. However, the nature of the photoprotective mechanism has ... attribute the red fluorescent coloration to green -to- red photoconvertible fluorescent proteins. The red fluorescent proteins are localized mainly in the ectodermal tissue...

Ngày tải lên: 16/03/2014, 11:20