Báo cáo khoa học: "Supervised and Unsupervised Learning for Sentence Compression" ppt

Tài liệu Báo cáo khoa học: "Trimming CFG Parse Trees for Sentence Compression Using Machine Learning Approaches" pptx

... sentence pairs. Thirty-two of these sentences were used for the human judgments in Knight and Marcu’s ex-periment, and the same sentences were used for our human judgments. The rest of the sentenceswere ... short and useful summaries.This task is called sentence compression.While several methods have been proposed for sentence compression (Witbrock and Mittal, 1999;Jing and McKeown, 1999; Vandeghinste ... if “never” is removedfrom a sentence, the meaning of the sentence com-pletely changes. Turner and Charniak (Turner and Charniak, 2005) revised and improved Knight and Marcu’s algorithm; however,...

Báo cáo khoa học: "Toward General-Purpose Learning for Information Extraction" ppt

... devel- opment calls for information extraction systems which are as retctrgetable and general as possi- ble. Here, we describe SRV, a learning archi- tecture for information extraction ... which is de- signed for maximum generality and flexibility. SRV can exploit domain-specific information, including linguistic syntax and lexical informa- tion, in the form of features provided ... parser and Wordnet. Experiments compare the learner's performance with and without such linguistic information. Surprisingly, in many cases, the system performs as well without this information...

Báo cáo khoa học: " A Noisy-Channel Model for Document Compression" pptx

... certain sentences may resultin incoherence and information loss. The deletion ofcertain words and phrases may also lead to ungram-maticality and information loss.The mayor is now looking for ... sen-tences can be expanded into longer ones by inserting and expanding syntactic constituents (and words).Since our constituent-expand stochastic operationsimply reimplements Knight and Marcu’s model, ... achieves an f-score of for EDUidentiﬁcation, for identifying hierarchical spans, for nuclearity identiﬁcation and for relation tagging.ParserDiscourseSyntaxParserForestGeneratorDecoderChooserLengthOutput...

Tài liệu Báo cáo khoa học: Structure and function of plant aspartic proteinases pptx

... proposed for cenprosin,the AP from Centaurea calcitrapa [30] and for recombinantoryzasin 1, the rice AP [29].A slightly different picture has emerged for prophytepsin.Using metabolic labeling and ... prophytepsin, the precursorform of barley AP containing the prosegment and the PSI(PDB code: 1QDM) [25] (Fig. 2). Both APs are two-chainpolypeptides in their mature forms and present a verysimilar ... precursor form of cyprosin was processedin different isoforms by the excision of the prosegment and of most of the PSI [21]. Conversely to what has been foundin vivo [31], heavy and light chains...

Tài liệu Báo cáo khoa học: "Fast Online Lexicon Learning for Grounded Language Acquisition" pdf

... correct destination (and orienta-tion in the single -sentence version).We follow the same evaluation scheme as Chen and Mooney and perform leave-one-map-out exper-iments. For the ﬁrst task, we ... data, and test on sen-tences from the third, unseen map. For all comparisons to the Chen and Mooney re-sults, we use the performance of their reﬁned land-marks plans system which performed ... improved results on matchingsentences and events on the sportscasting task and also introduced a new task of aligning weather fore-casts to weather information. Kim and Mooney(2010) further improved...

Tài liệu Báo cáo khoa học: "Multi-Task Active Learning for Linguistic Annotations" pdf

... tagger NE-AL and for the parser PARSE-AL.Further, random selection and extrinsic selectionperform worst. Most importantly, both MTAL pro-tocols clearly outperform extrinsic and random se-lection ... performedabout the same as random selection for the NE task,while for the parsing task extrinsic selection per-formed markedly worse. This shows that examplesthat were very informative for ... contrastto NE-AL which performs worse than random se-lection for all corpora when used as extrinsic selec-tion, and for PARSE-AL that outperforms the ran-dom baseline only for Brown when used as...

Tài liệu Báo cáo khoa học: "Analysis and Repair of Name Tagger Errors" pptx

... “<crisis-handling committee>8” as an organization name in preference to the alternative name candidate “<crisis-handling>8”. For a name candidate, high-confidence infor-mation ... event) and a set of arguments. When a name candidate is in-volved in an event, the trigger word and other arguments of the event can help to determine the name boundaries. For example, in the sentence ... counties, and cities) and Location. The HMM tagger generally follows the Nymble model (Bikel et al, 1997), and uses best-first search to generate N-Best hypotheses for each input sentence. ...

Tài liệu Báo cáo khoa học: "Syntactic and Semantic Transfer with F-Structures*" pptx

... transfer is as simple and straightfor- ward as possible. On the other hand, they need to encode sufficiently fine-grained information to steer transfer. Furthermore, target and source representations ... over feature structures for transfer, see (Emele and Dorna, 1998). 2For presentational purposes we leave out morpho- syntactic information in f-structures here and in the fol- lowing examples. ... can be converted into sets of terms and vice versa} F-structure 1For motivation why we prefer term representations PRED features and their "semantic form" values are given special...

Tài liệu Báo cáo khoa học: "Syntactic and Semantic Kernels for Short Text Pair Categorization" docx

... structures for rela-tional learning from questions and answers. Wedesigned sequence kernels for words and Part ofSpeech Tags which capture basic lexical seman-tics and basic syntactic information. ... (Collins and Duffy, 2002; Kudo and Matsumoto, 2003; Cumby and Roth, 2003; Shenet al., 2003; Moschitti and Bejan, 2004; Culotta and Sorensen, 2004; Kudo et al., 2005; Toutanovaet al., 2004; Kazama and ... models and bag-of-words. There-fore, learning methods to exploit syntax and semantics are required. In this pa-per, we present a new kernel for the repre-sentation of shallow semantic informationalong...

Báo cáo khoa học: Structural and functional roles for b-strand 7 in the a-crystallin domain of p26, a polydisperse small heat shock protein from Artemia franciscana pdf

... monomer. Monomers A (green) and B(yellow) form dimer 1, while monomers C (red) and D (blue) form dimer 2. L5 ⁄ 7, the loop between b-strands 5 and 7 which containsb-strand 6; N term, amino terminus ... dimers, with mono-mers A and B in dimer 1 and C and D in dimer 2(Fig. 8). The a-crystallin domain of each monomer iscomposed of nine b-strands (labeled b2–b10), with theb6 strand situated in a large ... locatedbetween b-strands 5 and 7. b-strand 10 inhabitsTable 1. Characteristics of p26 oligomers. The molecular mass ofp26 oligomers produced in transformed Escherichia coli BL21PRO and transfected...

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