an extensive empirical study of feature selection metrics
Báo cáo khoa học: "An Extensive Empirical Study of Collocation Extraction Methods" ppt
Ngày tải lên :
08/03/2014, 04:22
... 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...
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Tài liệu Báo cáo khoa học: "An Empirical Study of Information Synthesis Tasks" doc
Ngày tải lên :
20/02/2014, 15:20
... 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...
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Báo cáo khoa học: "An Empirical Study of Chinese Chunking" docx
Ngày tải lên :
08/03/2014, 02:21
... 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...
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Báo cáo khoa học: "An Empirical Study of the Influence of Argument Conciseness on Argument Effectiveness" docx
Ngày tải lên :
08/03/2014, 05:20
... 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...
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Crying Wolf: An Empirical Study of SSL Warning E ectiveness pot
Ngày tải lên :
16/03/2014, 19:20
... 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...
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Báo cáo khoa học: "An Empirical Study of Active Learning with Support Vector Machines for Japanese Word Segmentation" pptx
Ngày tải lên :
17/03/2014, 08:20
... 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...
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Báo cáo y học: "Comparative study of control selection in a national population -based case-control study: Estimating risk of smoking on cancer deaths in Chinese men"
Ngày tải lên :
26/10/2012, 09:48
... 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...
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Báo cáo khoa học: "Empirical Study of Predictive Powers of Simple Attachment Schemes for Post-modifier Prepositional Phrases" pptx
Ngày tải lên :
08/03/2014, 18:20
...
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...
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Activity-based costing diusion across organizations: an exploratory empirical analysis of Finnish firms docx
Ngày tải lên :
29/03/2014, 14:20
... 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 diusion 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...
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Graph drawing aesthetics and the comprehension of UML class diagrams: an empirical study pptx
Ngày tải lên :
07/03/2014, 17:20
... 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...
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