Báo cáo khoa học: "A Comparison of Event Models for Naive Bayes Anti-Spam E-Mail Filtering" potx

... A Comparison of Event Models for Naive Bayes Anti-Spam E-Mail Filtering Karl-Michael Schneider University of Passau Department of General Linguistics Innstr. 40, ... de- graded the performance of the classifier. number of times word w t occurs in di. The Naive Bayes assumption assumes that the dI trials are independent of each other. By making the Naive B...

Ngày tải lên: 31/03/2014, 20:20

... Framework of Naive Bayes This section presents the generative model for both cases of the naive Bayes classifier. First we explain the mechanisms they have in common, then, where the event models ... community about the naive Bayes classifier because there are two dif- ferent generative models in common use, both of which make the naive Bayes assumption.” Both are cal...

Ngày tải lên: 16/03/2014, 19:20

... gen- eration of basic Stanford dependencies (for constituent parsers) and part -of- speech tagging (for dependency parsers). 3 Results Table 3 tabulates efficiency and performance for all parsers; ... Proceedings of the 50th Annual Meeting of the Association for Computational Linguistics, pages 11–16, Jeju, Republic of Korea, 8-14 July 2012. c 2012 Association for Computationa...

Ngày tải lên: 23/03/2014, 14:20

... fre- quency of a term in the document space (x) and the average frequency of the same set of terms in the sentence space (y). For example, the average number of sentences for the set of terms ... slope coefficient of 1.6 for documents and 1.7 for sentences and terms. We conclude with an analysis of IDF stability with respect to random, journal, and section partitio...

Ngày tải lên: 17/03/2014, 04:20

... policy, an agreement of 92.8% was achieved among annotators for the set of start and stop locations for arguments. Examples of semantic role annotations in our corpus for each of the four predicates ... harmonic mean of precision and recall. Our calculation of recall scores represents the best-possible performance of systems using only these types of parse-tree p...

Ngày tải lên: 20/02/2014, 12:20

... provide a formulation for the number of structures that can be built for a sentence pair of size n. ITGs explore almost all of permutation space when n is small, but their coverage of permutation ... de- scribed in terms of how links interact. For the sake of describing the size of alignment spaces, we will assume that both sentences have n tokens. The largest alignment sp...

Ngày tải lên: 08/03/2014, 21:20

... processing of different grammatical formalisms. At the same time it is of course a natural test bed for experiments with various control strategies. Previously a number of comparisons of rule- ... conditions for and ways of predicting new edges 4. This section will therefore in effect constitute a survey of different methods for predicting new edges. 2.1 Top-Down Stra...

Ngày tải lên: 09/03/2014, 01:20

... Computational Linguistics A Comparison of Loopy Belief Propagation and Dual Decomposition for Integrated CCG Supertagging and Parsing Michael Auli School of Informatics University of Edinburgh m.auli@sms.ed.ac.uk Adam ... In Proc. of NIPS. 480 Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics, pages 470–480, Portland, Oregon, June 19-24,...

Ngày tải lên: 23/03/2014, 16:20

... construction of the English head acceptor models, common to both systems, a rough estimate of the effort required for completing the models for English to Chinese translation is 12 person-months for ... the conclusion for the improvement in performance of the transducer system is valid because the amount of effort in building and training the transfer models exceed...

Ngày tải lên: 24/03/2014, 03:21

... involve the generation of pro-forms instead of, or in addi- tion to, the ellipsis proper. For example, John laughed, and Mary did, too—a case of VP Ellipsis—includes the pro- form did. Nor do we ... form of a non-finite complement 3 For lack of space, here we cannot go into aspects of word- order variation (both Estonian and German are languages with relatively free wo...

Ngày tải lên: 31/03/2014, 20:20