Tài liệu Báo cáo khoa học: "Semi-supervised Learning of Dependency Parsers using Generalized Expectation Criteria" ppt

... Proceedings of the 47th Annual Meeting of the ACL and the 4th IJCNLP of the AFNLP, pages 360–368, Suntec, Singapore, 2-7 August 2009. c 2009 ACL and AFNLP Semi-supervised Learning of Dependency Parsers using ... a non-machine -learning expert. This paper proposes a method for directly guid- ing the learning of dependency parsers with nat- urally encoded linguistic in...

Ngày tải lên: 20/02/2014, 07:20

... ex- amples of the previous section. From the point of view of bag -of- word methods, the pairs (T 1 , H 1 ) and (T 1 , H 2 ) have both the same intra-pair simi- larity since the sentences of T 1 and ... rules that describe a non trivial set of entailment cases. The experiments with the data sets of the RTE 2005 challenge show an improvement of 4.4% over the state -of- the-art me...

Ngày tải lên: 20/02/2014, 12:20

... relation. 2.2 Machine Learning Algorithms We are also interested in comparing the perform- ance of machine learning algorithms on the task of mapping from n-gram frequencies of joining terms to ... Over the set of 5 semantic rela- tions defined by Nastase and Szpakowicz (2003), they achieve an accuracy of 45.7% for the task of assigning one of 5 semantic relations to e...

Ngày tải lên: 20/02/2014, 12:20

... Online Learning of Approximate Dependency Parsing Algorithms Ryan McDonald Fernando Pereira Department of Computer and Information Science University of Pennsylvania Philadelphia, ... discriminative on- line learning using those approximate al- gorithms achieves the best reported pars- ing accuracy for Czech and Danish. 1 Introduction Dependency representations of sentences...

Ngày tải lên: 22/02/2014, 02:20

... profiles of the signal sequence regions of human, eel, frog, T. scyllia and H. japonicus DNases I. However, prediction of the secondary structure of the corresponding part of the enzyme using the SSTHREAD 2 Program ... r lysates of cells that had been transfected with expression vectors containing the entire coding regions of the wild-type shark DNases I, substitution of the...

Ngày tải lên: 19/02/2014, 16:20

... the word senses numbered i of the word x. I x is the word sense indexing function of x that gives an index to each sense of the word x. All contextual words x i ±j of a central word x have ... 1 shows the average number of clusters with each clustering method shown chapter 3 by the part of speech. WC and WF are the average number of senses by the part of speech. In Ta...

Ngày tải lên: 20/02/2014, 16:20

... similarly hard pressed, but on grounds of information quality and efficient use of limited resources. Given the serial and ephemeral nature of speech and the limits of working memory, it is most expedient ... Cb). Cf is a par- tially ordered list of centering candidates; 2 the Cb, at the head of Cf, is the current center of attention. After each utterance, one of three...

Ngày tải lên: 20/02/2014, 22:20

... spe- cific types of part-whole relations (member -of, sub-quantity -of, contained-in, structural part -of and located-in), and for the general set composed of all types. 4.1 Precision of Extracted Relations Two ... extraction (IE) harder when learning the individual types of part-whole relations? That is, we determine whether the performance of state -of- the-art IE systems in l...

Ngày tải lên: 20/02/2014, 04:20

... score of an action. In other words, the score of an hypothesis is the sum of the score of the most recent action h.A and the scores of the top hypotheses of the context states. The score of an ... novel learning framework lies be- tween supervised learning and reinforcement learn- ing. Guided learning is more difficult than super- vised learning, because we do not know the...

Ngày tải lên: 20/02/2014, 12:20

... the contribution of partition-based features and method-based features, we train our ranking model using each type of features in iso- lation. Results are shown in rows 4 and 5 of Ta- ble 3. For ... BNEWS is achieved using only method-based features, whereas the best result for NPAPER is obtained using only partition- based features. Nevertheless, since neither type of features...

Ngày tải lên: 20/02/2014, 15:20