an extensive empirical study of feature selection metrics

... status quo of an ongoing research study of collocations – an essential linguistic phenomenon hav- ing a wide spectrum of applications in the field of natural language processing. The core of the work ... J. Panevová, P. Sgall, and B. Vidová-Hladká. 2001. Prague dependency treebank 1.0. Published by LDC, University of Pennsylvania. K. Kita, Y. Kato, T. Omoto, and Y. Yano. 1994. A comparative study ... measures and com- pute an association score for each collocation candi- date extracted from a corpus. The scores indicate a chance of a candidate to be a collocation. They can be used for ranking...

Ngày tải lên: 08/03/2014, 04:22

Ngày tải lên: 09/09/2013, 23:46

Ngày tải lên: 09/09/2013, 23:50

... bet- ter than ROUGE for a relevant class of topics. Section 3 describes these metrics and the experi- mental design to compare them; in Section 4, we an- alyze the outcome of the experiment, and Section ... On the other hand, all baselines improve, and some of them (SentenceSim precision and perplexity) give better results than both ROUGE and NICOS. Of course, no reliable conclusion can be obtained from ... Sum- marization, Edmonton, Canada. V. Khandelwal, R. Gupta, and J. Allan. 2001. An Evaluation Corpus for Temporal Summarization. In Proceedings of the First International Confer- ence on Human Language Technology...

Ngày tải lên: 20/02/2014, 15:20

... listed as follows: ã WORD: uni-gram and bi-grams of words in an n window. ã POS: uni-gram and bi-grams of POS in an n window. ã WORD+POS: Both the features of WORD and POS. where n is a predefined ... UPENN Chinese Treebank-4(CTB4). We presented an empirical study of Chinese chunk- ing on this corpus. First, we made an evaluation on the corpus to clarify the performance of state- of- the-art models ... large number of observation features as well as differ- ent state sequence based features and other fea- tures we want to add. Tan et al. (Tan et al., 2005) applied CRFs to Chinese chunking and their...

Ngày tải lên: 08/03/2014, 02:21

... descriptions of objects and processes from a knowledge base (Lester and Porter March 1997), text summaries of quantitative data (Robin and McKeown 1996), descriptions of plans (Young to appear) and ... autonomous exploration of the set of alternatives and the selection of the preferred alternatives. Let’s examine now how an argument generator can be evaluated in the context of the selection task, ... The arcs of the tree are weighted to represent the importance of the value of an objective in contributing to the value of its parent in the tree (e.g., in Figure 1 location is more than twice...

Ngày tải lên: 08/03/2014, 05:20

Ngày tải lên: 16/03/2014, 03:20

... survey/sdata/200701/ certca.html. [6] S. Egelman, L. F. Cranor, and J. Hong. You’ve been warned: an empirical study of the effectiveness of web browser phishing warnings. In Proceeding of the SIGCHI Conference on Human Factors ... bank wanted you to take?” responded that it wanted them not to pro- ceed. Only 3 FF2, 2 FF3, and 4 IE7 participants answered the same way. 4.2.4 Impact of Reading and Understanding In each of ... addition, our study participants were more technically sophis- ticated than the previous study s participants. 5.2 Explain the Danger The FF2, IE7, and our single page warnings take the standard tactic of...

Ngày tải lên: 16/03/2014, 19:20

... An Empirical Study of Active Learning with Support Vector Machines for Japanese Word Segmentation Manabu Sassano Fujitsu Laboratories Ltd. 4-1-1, Kamikodanaka, Nakahara-ku, Kawasaki ... a kanji character and a hi- ragana character. Of course, there are quite a few exceptions to this heuristics. For example, some proper nouns are written in mixed hiragana, kanji and katakana. The ... increment of support vectors is less than half of the average increment. Table 2: Accuracy at Different Labeled Data Sizes with Random Sampling #of Sen- tences # of Ex- amples #of Binary Features Accuracy (%) 21...

Ngày tải lên: 17/03/2014, 08:20

Ngày tải lên: 30/03/2014, 01:20

Ngày tải lên: 22/10/2014, 11:03

... prevalence of smoking between male living spouses of women who died of any cause and those spouses of women who died of some other causes other than smoking related causes. The preva- lence of smoking ... greater for urban males than rural males, both study groups revealed a con- sistent pattern of the effect of smoking on risk of can- cer deaths. TABLE 1. Characteristics of cases and two control ... of death at one time, and use of a single control group for more than one case series can lead to saving of money and time; 11-12 (3) all possible confounding factors (known or unknown) and...

Ngày tải lên: 26/10/2012, 09:48

... to some semantic subset of an antecedent. There was one additional case in which a subsequent noun phrase was a rephrasing of an antecedent. For the remaining 71 instances, no antecedent could ... infrequently and since one of the major foci of the study was to try to find general means of deciding attachment of PPs, individualization of these PPs was, at first, discounted. In some of the ... participant. Partici- pants of the study were each asked to plan a spe- cific travel agenda of their choice with information obtained solely by typing natural language mes- sages and requests...

Ngày tải lên: 08/03/2014, 18:20

... inside the group of adopting organizations. 5.1.2. The analysis of organizati onal determinants Let us next focus on the organizational deter- minants of adopting organizations instead of the adopter ... sug- gesting that management accounting systems are changed because of fads and fashions. However, fad and fashion as explanations for diusion of management accounting innovation and change are not ... Adoption and diusion of an innovation of uncertain prođtability. Jour nal of Economic Theory, 27, 182±193. Johnson, H. T., & Kaplan, R. S. (1987). Relevance lost: the rise and fall of management...

Ngày tải lên: 29/03/2014, 14:20

Ngày tải lên: 30/03/2014, 23:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 09/08/2014, 01:21

Ngày tải lên: 11/09/2013, 11:44

... they were semantically related. Second, in informal discussions with the subjects, many of them commented that the grouping of semantically related classes was an important layout feature. Further ... the semantics of the diagram, are more likely to be effective from a human understanding point of view. Acknowledgements We are grateful to the students of the School of Computer Science and Electrical ... University of Queensland who willingly took part in the experiment, and to the Australian Research Council, which funded this research. Ethical clearance for this study was granted by The University of...

Ngày tải lên: 07/03/2014, 17:20