kernel based discourse relation recognition

Ngày tải lên: 30/03/2014, 21:20

... K n is the kernel applied on the normal features. Both kernels are divided by their respective length 4 for normaliza- tion. The new composite kernel K c , defined as the 4 The length of a kernel ... as shown in Figure 1). 4.3 Structural Kernel and Composite Kernel To calculate the similarity between two structured features, we use the convolution tree kernel that is defined by Collins and ... we propose a kernel- based method to incorporate the information from parse trees. Specifically, we di- rectly utilize the syntactic parse tree as a struc- tured feature, and then apply kernels to...

Ngày tải lên: 20/02/2014, 11:21

... for Kernel- based Text Analysis Taku Kudo and Yuji Matsumoto Graduate School of Information Science, Nara Institute of Science and Technology {taku-ku,matsu}@is.aist-nara.ac.jp Abstract Kernel- based ... previous manual feature selection. This is the main reason why kernel- based learning has delivered great results to the field of NLP. Kernel- based text analysis shows an excellent per- formance in terms ... Frequency -based Pruning The PKE with a Cubic Kernel tends to make Ω large (e.g., |Ω| = 2.32 million for JWS, |Ω| = 8.26 mil- lion for JDP). To reduce the size of Ω, we examined sim- ple frequency-based...

Ngày tải lên: 08/03/2014, 04:22

... engine to perform relation extrac- tion; 3. Empirical assessment of the system on a corpus of entailed relations. 2 Entailed Relation Recognition (ERR) In the task of Entailed Relation Recognition, ... su- pervised relation extraction, which requires addi- tional supervised data to learn new relations. Specifically, the contributions of this paper are: 1. Introduction of the entailed relation recognition framework; ... approach to solving the En- tailed Relation Recognition task, based on Tex- tual Entailment, and implemented a solution that shows that a Textual Entailment Recognition sys- tem can be scaled...

Ngày tải lên: 17/03/2014, 02:20

Ngày tải lên: 23/03/2014, 17:20

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Ngày tải lên: 31/03/2014, 03:20

Ngày tải lên: 24/04/2014, 13:39

Ngày tải lên: 20/06/2014, 20:20

Ngày tải lên: 21/06/2014, 17:20

Ngày tải lên: 22/06/2014, 23:20

... Singapore, 2-7 August 2009. c 2009 ACL and AFNLP Improving Automatic Speech Recognition for Lectures through Transformation -based Rules Learned from Minimal Data Cosmin Munteanu ∗† ∗ National Research ... CANADA {gpenn,xzhu}@cs.toronto.edu Xiaodan Zhu † Abstract We demonstrate that transformation -based learning can be used to correct noisy speech recognition transcripts in the lec- ture domain with an average word error rate ... transcripts on human subjects (Munteanu et al., 2006), and have found that task- based usability varies in linear relation to WER. An analysis of the rules selected by both TBL implementations...

Ngày tải lên: 20/02/2014, 07:20

... approaches have been proposed in the literature of relation extraction. Among them, feature -based and kernel- based approaches are most popular. Kernel- based approaches exploit the structure of the ... 2003. Kernel Methods for Relation Extraction. Journal of Machine Learning Research 3:1083-1106 Min Zhang, Jie Zhang, Jian Su and Guodong Zhou. 2006. A Composite Kernel to Extract Relations ... Exploring Various Knowledge in Relation Extraction. In Proceedings of ACL, pages 427-434. GuoDong Zhou, Min Zhang, Donghong Ji and Qiaoming Zhu. 2007. Tree Kernel- based Relation Extraction with...

Ngày tải lên: 20/02/2014, 09:20

Ngày tải lên: 21/02/2014, 21:56

... oligosaccharides (Eur. J. Biochem. 269) 3147 Trehalose -based oligosaccharides isolated from the cytoplasm of Mycobacterium smegmatis Relation to trehalose -based oligosaccharides attached to lipid Masaya ... Sciences and Chemistry, Louisiana State University, Baton Rouge, LA, USA A series of trehalose -based oligosaccharides were isolated from the cytoplasmic fraction of Mycobacterium smegmatis and ... report on the isolation from the cytoplasm and characterization of trehalose and five other trehalose -based oligosaccharides. Two of these oligosaccha- rides are newly described tetrasaccharides, so...

Ngày tải lên: 22/02/2014, 07:20

... methods on ACE RDC task. Relation Dectection Relation Detection and Classification on Types on Subtypes Method P R F P R F P R F Culotta and Soresen (2004) Tree kernel based 81.2 51.8 63.2 67.1 ... as 63.1%/49.5%/55.5% in Precision/Recall/F-measure on the relation subtype classification using feature based method, which outperforms tree kernel based method by Culotta and Soresen (2004). Compared with ... investigation of a graph based semi-supervised learning algorithm for relation ex- traction. In the future, we would like to use more ef- fective feature sets Zhou et al. (2005) or kernel based similarity...

Ngày tải lên: 08/03/2014, 02:21

... Throughout this paper, we call them dt-rules (Fig. 1) in order to distinguish them from recognition rules. Thus, each recognition rule is enhanced by a set of dt-rules. The dt-rules removes unlikely ... implement an ME system based on Ristad’s toolkit (1997). Borthwick’s (1999) and Uchimoto’s (2000) ME systems are quite similar but differ in details. They re- garded Japanese NE recognition as a classifica- tion ... recorded for the pair SHI-NAI/ LOCATION-END, If SHI-NAI/LOCATION-END Japanese Named Entity Recognition based on a Simple Rule Generator and Decision Tree Learning Hideki Isozaki NTT Communication...

Ngày tải lên: 08/03/2014, 05:20

... grammar and the occurrence frequency of each dependency relation is cal- culated. Based on the frequencies, probabili- ties of dependency relations are recalculated by C(wp + w~) The process ... excluding the dependency relations with near zero proba- bilities. References P. F. Brown, V. J. Della Pietra, P. V. deSouza, J. C. Lai, and R. L. Mercer. 1992. "Class- Based n-gram Models ... Conclusions In this paper, we presented a language model based on a kind of simple dependency gram- mar. The grammar consists of head-dependent relations between words and can be learned au- tomatically...

Ngày tải lên: 08/03/2014, 05:21