evaluation of machine learning methods for natural language processing tasks

Ngày tải lên: 23/03/2014, 14:20

... performing these tasks. In general we can say that the use of structural features can im- prove the performance of NLP tasks that require the details of the contents to perform the task. Most of ... successfully applied to tasks in natural language processing (NLP). Espe- cially, state -of- the-art performance can be achieved with kernel methods, such as Support Vector Machine (Cortes and Vapnik, ... ker- nels, are advantageous for both the concept and ac- curacy of many natural language processing (NLP) tasks. Experiments have, however, shown that the over-fitting problem often arises when these...

Ngày tải lên: 23/03/2014, 19:20

... tests for machine translation evaluation. In Proceedings of the 2004 Confer- ence on Empirical Methods in Natural Language Processing (EMNLP-04). Alex Kulesza and Stuart M. Shieber. 2004. A learning ... in the flexibility of the learning framework, which al- lows for new features to be added. Moreover, adap- tive learning methods may be applicable if a small sample of outputs of some representative ... and Chris Brockett. 2001. A machine learning approach to the automatic eval- uation of machine translation. In Proceedings of the 39th Annual Meeting of the Association for Computational Lin- guistics,...

Ngày tải lên: 08/03/2014, 02:21

Ngày tải lên: 08/03/2014, 01:20

Ngày tải lên: 08/03/2014, 01:20

Ngày tải lên: 29/03/2014, 08:20

... "comprehension" of natural language texts by computer. That Is, we were primarily concerned with the introduction of stereotyplc knowledge of objects into the conceptual analysis of text. ... eliminated. OPUS makes use of a well structured set of memory associations for objects, the Object Primitives, to encode Information which can be used in a variety of Rleger's qeneral ... kinds of associative memory required to produce what appeared from Rieger's model to ~e the "tremendous amount of 'hidden' computation" necessary for the processing of...

Ngày tải lên: 21/02/2014, 20:20

... method) for handling incoming messages of its instances. A class inherits methods of its superclasses. Z. Interpretation of PAL Expressions in Object-Oriented Domain A class is defined for each ... result of the evaluation is a new version of the object runs0, say runs 1. The above discussion is overly simplified for the purpose of explanation. The following sections discuss a number of ... evaluating the form which results from replacing each constant of a given PAL expression by an instance of an object whose class name is the same as the label of the constant. The evaluation is...

Ngày tải lên: 21/02/2014, 20:20

... Web Text Corpus for Natural Language Processing Vinci Liu and James R. Curran School of Information Technologies University of Sydney NSW 2006, Australia {vinci,james}@it.usyd.edu.au Abstract Web ... vectors of headwords in the corpus to determine the most similar terms. 6.2 Evaluation The evaluation of a list of synonyms of a target word is subject to human judgement. We use the evaluation ... performed a wide range of NLP tasks using web data by querying Altavista and Google. This included variety of generation tasks (e.g. machine translation candi- date selection) and analysis tasks...

Ngày tải lên: 17/03/2014, 22:20

Ngày tải lên: 31/03/2014, 17:20

Ngày tải lên: 01/04/2014, 00:20

Ngày tải lên: 01/04/2014, 00:20

... Because of the high-dimensional nature of natural language, it is often easy to generate an extremely large number of features. The challenge of parameter estimation is to find a combination of ... Republic, June 2007. c 2007 Association for Computational Linguistics A Comparative Study of Parameter Estimation Methods for Statistical Natural Language Processing Jianfeng Gao * , Galen Andrew * , ... compared five of the most competitive para- meter estimation methods on four NLP tasks em- ploying a variety of models, and the results were remarkably consistent across tasks. Three of the methods...

Ngày tải lên: 08/03/2014, 02:21

Ngày tải lên: 02/06/2014, 09:22

... even more difcult for them to obtain healthcare due to isolation. Distance learning provides an option of decreased isolation, but this Evaluation of Distance Learning for Health Education Kelley ... the two sites returning evaluation forms. Study limitations include the fact that only seven sites continue to make use of the distance learning sessions, Evaluation of program effectiveness ... lack of healthcare providers in rural areas, a lack of trust in western medicine and a general lack of understanding of health issues. In addition, since people with the least resources often...

Ngày tải lên: 05/03/2014, 22:21

... Ker- nel methods for relation extraction. Journal of Machine Learning Research. Dell Zhang and Wee Sun Lee. 2003. Question classifica- tion using support vector machines. In proceedings of SI- GIR’03, ... (production of( n 1 ) > production of( n 2 )) then n 2 = extract(L 2 ); else if (production of( n 1 ) < production of( n 2 )) then n 1 = extract(L 1 ); else while (production of( n 1 ) == production of( n 2 )) while ... roles associated with verbal predicates, for a total of 37,948 arguments. We randomly selected 30% of sentences for testing and 70% for training. Addi- tionally, 30% of training was used as a validation- set....

Ngày tải lên: 08/03/2014, 21:20

... Computational Theory of Prose Style for Natural Language Generation David D. McDonald and James D. Pnstejovsky Department of Computer and Information Science University of M~,=.~chnsetts at ... looked at our treatment of four of the five points which we said at the onset of this paper had to b,~ considered by any theory of prose style. The fifth point, the kinds of information stylistic ... (1985a) WAGs as a Grammatical Formalism for Generation", pr~eedings of the 23rd Annual Meeting of the Association for Computational Linguistics, University of Chicago. McDonald D. & Pustejovsky...

Ngày tải lên: 09/03/2014, 01:20

... EMPIRICAL STUDIES OF DISCOURSE REPRESENTATIONS FOR NATURAL LANGUAGE INTERFACES Ntis Dahlb~ick Ame JOnsson Natural Language Processing Laboratory Department of Computer and Information Science ... future only be able to handle a subset of natural language. The usability of this type of in- terfaces is therefore dependent on finding subsets of natural language that can be used without the ... Tennant, H. (1981) Evaluation of Natural Language Processors Ph.D. Thesis, University of Illinois at Urbana-Champaign. Thomas, J.C. (1976) A method for studying natural language dialogue....

Ngày tải lên: 18/03/2014, 02:20

... Califf and R. J. Mooney. 2004. Bottom-Up Rela- tional Learning of Pattern Matching Rules for Infor- mation Extraction. Journal of Machine Learning Re- search, MIT Press. W. Drozdzynski, H U.Krieger, ... use PI for Person_In, PO for Person_Out, POS for Position and ORG for Organisation. In our experiments, we attempt to investigate the influence of the size of the seed and the size of the ... seeds for the next iteration of the learning cycle. The cycle termi- nates when no new relations can be acquired. The linguistic annotation is responsible for en- riching the natural language...

Ngày tải lên: 23/03/2014, 18:20

... In Proceedings of the First Conference of the Association for Machine Translation in the Ameri- cas, pages 193–205, Columbia, Maryland. BLEU: a Method for Automatic Evaluation of Machine Translation Kishore ... judges which substitutes for them when there is need for quick or frequent evaluations. 1 1 Introduction 1.1 Rationale Human evaluations of machine translation (MT) weigh many aspects of translation, ... output of Chinese- English MT systems. References E.H. Hovy. 1999. Toward finelydifferentiated evaluation metrics for machine translation. In Proceedings of the Eagles Workshop on Standards and Evaluation, ...

Ngày tải lên: 23/03/2014, 20:20