investigating gis and smoothing for maximum entropy tagger
Tài liệu Báo cáo khoa học: "Investigating GIS and Smoothing for Maximum Entropy Taggers" pot
Ngày tải lên :
22/02/2014, 02:20
... Investigating
GIS
and Smoothing for Maximum Entropy Taggers
James R. Curran
and
Stephen Clark
School of Informatics
University of Edinburgh
2 Buccleuch ...
00-
18 for training and
WSJ
22-24 for testing, and
Toutanova and Manning (2000) use
WSJ
00-20 for
training and
WSJ
23-24 for testing. Collins uses
a linear perceptron, and Toutanova and Manning
(T&A4) ... required for the correct-
ness of
GIS,
is unnecessary. We also ex-
plore the use of a Gaussian prior and a
simple cutoff for smoothing. The exper-
iments are performed with two tagsets:
the standard...
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Báo cáo khoa học: "Iterative Scaling and Coordinate Descent Methods for Maximum Entropy" pdf
Ngày tải lên :
23/03/2014, 17:20
... OpenNLP
(http://maxent.sourceforge.net).
We implement CD (the new one in Section 3.2),
GIS, SCGIS, and LBFGS for comparisons. We
include LBFGS as Malouf (2002) reported that
it is better than other approaches including GIS
0 ... versa.
2.2 Existing Iterative Scaling Methods
We introduce GIS, IIS and SCGIS via the pro-
posed framework. GIS and IIS use a parallel up-
date, but SCGIS is sequential. Their approximate
functions aim ... changed. For
GIS and SCGIS, if
x,y
˜
P (x)P
w
(y|x)f
t
(x, y)
is stored at the first Newton iteration, then (12)
can be done in O(1) time. For IIS, because
f
#
(x, y) of (12) depends on x and y,...
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Báo cáo khoa học: "Language Dynamics and Capitalization using Maximum Entropy" pot
Ngày tải lên :
17/03/2014, 02:20
... retraining
is suitable for using large amounts of data and for
language adaptation.
4 Conclusions and Future Work
This paper shows that maximum entropy models
can be used to perform the capitalization ... June 2008.
c
2008 Association for Computational Linguistics
Language Dynamics and Capitalization using Maximum Entropy
Fernando Batista
a,b
, Nuno Mamede
a,c
and Isabel Trancoso
a,c
a
L
2
F ... Schwartz, and R. Weischedel.
1999. Performance measures for information extrac-
tion. In Proceedings of the DARPA Broadcast News
Workshop, Herndon, VA, Feb.
C. Martins, A. Teixeira, and J. P....
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Báo cáo khoa học: "Feature Lattices for Maximum Entropy Modelling" pot
Ngày tải lên :
23/03/2014, 19:20
...
adding new nodes. Case a) stands for adding the feature A to the empty lattice, case b) stands for adding the feature
B to the lattice with the feature A and case c) stands for adding the feature ... with the most uniform distribution. The
most uniform distribution will have the entropy
on its maximum
Because of its ability to handle overlapping
features the maximum entropy framework ... parameters for
many candidate features many times. In this
paper we present a novel approach for building
maximum entropy models. Our approach uses
the feature collocation lattice and builds...
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Báo cáo khoa học: "Combining Lexical, Syntactic, and Semantic Features with Maximum Entropy Models for Extracting Relations" pptx
Ngày tải lên :
31/03/2014, 03:20
... Syntactic, and Semantic Features with
Maximum Entropy Models for Extracting Relations
Nanda Kambhatla
IBM T. J. Watson Research Center
1101 Kitchawan Road Route 134
Yorktown Heights, NY 10598
nanda@us.ibm.com
Abstract
Extracting ... after
making some general observations in section 4.
2 Maximum Entropy models for
extracting relations
We built Maximum Entropy models for predicting
the type of relation (if any) between every ... trees.
We build Maximum Entropy models for extract-
ing relations that combine diverse lexical, syntactic
and semantic features. Our results indicate that us-
ing a variety of information sources...
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Optimal placement of horizontal - and vertical - axis wind turbines in a wind farm for maximum power generation using a genetic algorithm
Ngày tải lên :
05/09/2013, 17:03
... Best, mean and median objective valuses for Case I
(b) Standard deviations for Case I
(c) Best, mean and median objective values for Case II
(d) Standard deviations for Case II ... 46.06
(a) Best, mean and median objective values for Case III
(b) Standard deviations for Case III
Figure 8. Continued
International Journal of Energy and Environment (IJEE), Volume ...
(c) Best, mean and median objective values for Case IV
(d) Standard deviations for Case IV
Figure 8. Convergence history of the objective function (total power/cost) for VAWT wind farm...
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Tài liệu Báo cáo khoa học: "Refined Lexicon Models for Statistical Machine Translation using a Maximum Entropy Approach" pptx
Ngày tải lên :
20/02/2014, 18:20
... word and repre-
sents a specific source word.
Category if and only if
1
2 and
2 and
3 and
3 and
6 and
7 and
for the word pair , we use the following
categories of features:
1. ( )
2. ( ) and
3. ... features:
1. ( )
2. ( ) and
3. ( ) and
4. ( ) and
5. ( ) and
6. ( ) and
7. ( ) and
8. ( ) and
9. ( ) and
Category 1 features depend only on the source
word and the target word . A ME model that
uses ... results for the
Verbmobil Test-147 for different contextual infor-
mation and different thresholds using the top-10
translations. The baseline translation results for
model 4 are WER=54.80 and PER=43.07.
English...
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Superfruits: (Top 20 Fruits Packed with Nutrients and Phytochemicals, Best Ways to Eat Fruits for Maximum Nutrition, and 75 Simple and Delicious Recipes for Overall Wellness) pdf
Ngày tải lên :
06/03/2014, 05:21
... support adult amounts of 0.25–0.50 g
(250–500 mg) per day for DHA and EPA, 10 g for linoleic acid, and 2 g
for alpha-linolenic acid. The FDA and Institute of Medicine are currently
evaluating research ... essential for health!
This page intentionally left blank
Advance Praise for Superfruit s
“Paul Gross’s straightforward and well-documented book provides strong
direction and clear-cut answers for ... intentionally left blank
FOREWORD ix
fruits in this entertaining and informative book. Dr. Gross is a leading
expert and strong proponent of consumer education and superfruit sci-
ence, and following careers...
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Báo cáo khoa học: "Maximum Entropy Based Phrase Reordering Model for Statistical Machine Translation" docx
Ngày tải lên :
08/03/2014, 02:21
... the
class. For feature f and class c, the IGR(f, c)
IGR(f, c) =
En(c) − En(c|f)
En(f)
(11)
where En(·) is the entropy and En(·|·)
is the conditional entropy. To our sur-
prise, the IGR for the four ... possi-
ble non-aligned word to get blocks E(b)
6: for each block b
∗
∈ b
E(b) do
7: Register b
∗
to the links of four corners of it
8: end for
9: end for
10: for each corner C in the matrix M do
11: ... rule
probabilities and organizing them in a log-linear
form. This straight way makes it clear how rules
are used and what they depend on.
For the two merging rules straight and inverted,
applying...
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Báo cáo khoa học: "Analysis System of Speech Acts and Discourse Structures Using Maximum Entropy Model*" pptx
Ngày tải lên :
17/03/2014, 07:20
... construct two statistical models: one for
speech act analysis and the other for discourse
structure analysis. We integrate the two models
using maximum entropy model. In the following
subsections, ...
utterances 5 and 6 ends and the segment 1.1 is
resumed. Therefore the DSB of utterance 7
becomes 1E.
2.2.2 Statistical model for discourse structure
analysis
We construct a statistical model for ... consisting of utterances 3 and
4 ends, and new sub-dialogue starts at utterance
5. Therefore, the DSB of utterance 5 becomes
lB. Finally, utterance 7 is a response for
utterance 2,
i.e.,
the...
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Báo cáo khoa học: "Semi-Supervised Maximum Entropy Based Approach to Acronym and Abbreviation Normalization in Medical Texts" doc
Ngày tải lên :
17/03/2014, 08:20
... kind
5
:
(1)
==
=
otherwise
ycandxoif
coF
,0
,1
),(
Where “o” stands for outcome and “c”
stands for context. This function maps
contexts and outcomes to a binary set. For
4
This paper presents ... training data
and uniformly distributes the probability
space between the candidates that do not
conform to the constraints. Since the
entropy of a uniform distribution is at its
maximum, hence ... generating training data
for Maximum Entropy (ME) modeling
of abbreviations and acronyms and
will show that using ME modeling is a
promising technique for abbreviation
and acronym normalization....
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An application of GIS and Remote Sensing for Analysis of Agricultural Development-Induced Changes in Land Use: A case study in Lao PDR pdf
Ngày tải lên :
17/03/2014, 11:20
... land use and land
covers
• To create a tool for decision support system in the
watershed land use planning by created land zoning.
5
Conclusions (cont.)
For 2
nd
objective
1.The tool for decision ... of land use areas were changed (decreased/increased) and
fragmented (field crop, evergreen forest, fallow forest) as a result of both
farmers who lost their lands and turned to clear-cut forest ... Objectives
4. Materials and Methods
5. Study area
6. Results and Discussions
7. Conclusions
2
Materials
• Satellite images:
– Landsat ETM+ (25 January 1999), LIG
format
• Resolution
– 30 m (band 1-5,7)
–...
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Cambridge.University.Press.Protecting.the.Polar.Marine.Environment.Law.and.Policy.for.Pollution.Prevention.Jan.2001.pdf
Ngày tải lên :
21/09/2012, 10:58
... hospitality and organisational help: for
the 1998 workshop, hvala to Berta Dragicˇevic´, Srec´ko Krzˇic´ and Dubravka
Kapetanic´; for the 1997 workshop, takk to Jan Magne Markussen, and to Willy and
Sonja ... cold and diluted water meets warmer and saltier
water from the south.
40
The Arctic Ocean is, in addition, almost completely encir-
cled by the landmasses of North America, Eurasia and Greenland. ... takk to Jan Magne Markussen, and to Willy and
Sonja Østreng; and for the 1996 workshop, thanks to Bruce and Rosalie Davis, and
to Richard and Twila Herr. Moreover, on the occasion of the 1996 workshop...
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