a unified statistical model
Báo cáo khoa học: "A Unified Statistical Model for the Identification of English BaseNP" pptx
Ngày tải lên :
08/03/2014, 05:20
... important subtask for
many natural language processing applications,
such as partial parsing, information retrieval and
machine translation. A baseNP is a simple noun
phrase that does not contain other ... pp.218-224.
COLING-ACL’98
Lance A. Ramshaw and Michael P. Marcus ( In
Press). Text chunking using transformation-based
learning. In Natural Language Processing Using
Very large Corpora. Kluwer. Originally appeared
in ... other
approaches where the two steps are
separated, we integrate them into a unified
statistical framework. Our model also
integrates lexical information. Finally,
Viterbi algorithm is applied...
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Tài liệu Báo cáo khoa học: "A Unified Graph Model for Sentence-based Opinion Retrieval" pdf
Ngày tải lên :
20/02/2014, 04:20
...
represented by a bag-of-word. Among the words,
there is a topic term Avatar (t
1
) occurring twice,
i.e. Avatar in A and Avatar in C, and two senti-
ment words comfortable (o
1
) and favorite (o
2
) ...
4.1.1
Benchmark Datasets
Our experiments are based on the Chinese
benchmark dataset, COAE08 (Zhao et al., 2008).
COAE dataset is the benchmark data set for the
opinion retrieval track in the ... document. A weighted dictionary was
generated from previous TREC relevance data
(Amati et al., 2007). This dictionary was submit-
ted as a query to a search engine to get an initial
query-independent...
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Tài liệu Báo cáo khoa học: "A Joint Statistical Model for Simultaneous Word Spacing and Spelling Error Correction for Korean" pdf
Ngày tải lên :
20/02/2014, 12:20
... be divided into
statistical algorithms and rule-based algorithms.
Statistical algorithms generally use character n-
gram (Eojeol
1
or Eumjeol
2
n-gram in Korean)
(Kang and Woo, 2001; Kwon, ... it needs a word dictionary and takes long
time for searching many character combinations.
61
4.2 Experiment Results and Analyses
We used two separate Eumjeol n-grams as lan-
guage models for ... single Jaso tran-
3
Jaso is a Korean character.
4
‘Transition’ means the correct character is changed to other
character due to some causes, such as typographical errors.
sition case (나와욧Æ나와요...
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Tài liệu Báo cáo khoa học: "A Statistical Model for Unsupervised and Semi-supervised Transliteration Mining" pptx
Ngày tải lên :
19/02/2014, 19:20
... system
learns this as a non-transliteration but it is wrongly
annotated as a transliteration in the gold standard.
Arabic nouns have an article “al” attached to them
which is translated in English as ... uses
Hidden Markov Models (Nabende, 2010; Darwish,
2010; Jiampojamarn et al., 2010), Finite State Au-
tomata (Noeman and Madkour, 2010) and Bayesian
learning (Kahki et al., 2011) to learn transliteration
pairs ... International
Language Resources and Evaluation (LREC’10), Val-
letta, Malta.
Sittichai Jiampojamarn, Kenneth Dwyer, Shane Bergsma,
Aditya Bhargava, Qing Dou, Mi-Young Kim, and
Grzegorz Kondrak....
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Tài liệu Báo cáo khoa học: "A Phrase-based Statistical Model for SMS Text Normalization" ppt
Ngày tải lên :
20/02/2014, 12:20
... a consensus translation technique to bootstrap
parallel data using off-the-shelf translation sys-
tems for training a hierarchical statistical transla-
tion model for general domain instant ... SMS normalization.
2.3 SMS Normalization versus Text Para-
phrasing Problem
Others may regard SMS normalization as a para-
phrasing problem. Broadly speaking, paraphrases
capture core aspects ... minimal adaptation. One advantage of
this pre-translation normalization is that the di-
versity in different user groups and domains can
be modeled separately without accessing and
adapting...
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Tài liệu Báo cáo khoa học: "A Localized Prediction Model for Statistical Machine Translation" ppt
Ngày tải lên :
20/02/2014, 15:20
... set of candidates. This computational advantage
is the main reason that we adopt the local model in this
paper.
3.3 Global versus Local Models
Both the global and the localized log-linear models ... paper, we present a block-based model for statis-
tical machine translation. A block is a pair of phrases
which are translations of each other. For example, Fig. 1
shows an Arabic-English translation ... Boston, MA, May.
Christoph Tillmann and Fei Xia. 2003. A Phrase-based
Unigram Model for Statistical Machine Translation. In
Companian Vol. of the Joint HLT and NAACL Confer-
ence (HLT 03), pages...
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Tài liệu Báo cáo khoa học: "Modelling Early Language Acquisition Skills: Towards a General Statistical Learning Mechanism" potx
Ngày tải lên :
22/02/2014, 02:20
...
for cepstral mean normalisation (CMN) and cep-
stral mean and variance normalisation (CMVN).
Stage 2: A local-match distance matrix is then
calculated by measuring the cosine distance be-
Speech
... lan-
guage and building a lexicon, whereas grammar
is learnt via non -statistical methods later on. Sei-
denberg et al. (2002) believe that learning
grammar begins when statistical learning ... the computational and
mathematical methods to those that model be-
havioural data of human speech perception and
production within five main areas:
Front-end Processing: Research and devel-
opment...
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Báo cáo khoa học: "A Statistical Model for Lost Language Decipherment" pptx
Ngày tải lên :
17/03/2014, 00:20
... co-occurrence analysis oper-
ate over large corpora, which are typically unavail-
able for a lost language.
Finally, Knight and Yamada (1999) and Knight
et al. (2006) describe a computational HMM-
based ... structural sparsity constraints on
character-level mappings. We assume that an ac-
curate alphabetic mapping between related lan-
guages will be sparse in the following way: each
letter will map to a ... Publishers.
Benjamin Snyder and Regina Barzilay. 2008. Cross-
lingual propagation for morphological analysis. In
Proceedings of the AAAI, pages 848–854.
Wilfred Watson and Nicolas Wyatt, editors. 1999.
Handbook...
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Báo cáo khoa học: "Automatic Story Segmentation using a Bayesian Decision Framework for Statistical Models of Lexical Chain Features" pdf
Ngày tải lên :
23/03/2014, 17:20
... Lexical Chain Features
4.1 Chain starts and ends
We follow (Chan et al. 2007) to model the lexi-
cal chain starts and ends at a story boundary with
a statistical distribution. We apply a window ... consideration and statistically modeled.
2 Experimental Setup
Experiments are conducted using data from the
TDT-2 Voice of America Mandarin broadcast.
In particular, we only use the data from ... terms and locating instances of time
where the count of chain starts and ends (boun-
dary strength) achieves local maxima. Chan et al.
(2007) enhanced this approach through statistical
modeling...
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A two-factor model (Duffie & Kan)
Ngày tải lên :
18/10/2013, 02:20
... first solve (1) and (2) simultaneously numerically, and then integrate (3) to obtain the function
A
.
32.3 Calibration
Let
0
0
be given. The value at time
t
of a bond maturing at time
t + ... ,
1
2
2
2
C
2
2
;
(3)
A 0 = 0;
Chapter 32
A two-factor model (Duffie & Kan)
Let us define:
X
1
t=
Interest rate at time
t
X
2
t=
Yield at time
t
on a bond maturing at time
t +
0
Let
X
1
0 ... CHAPTER 32. A two-factor model (Duffie & Kan)
321
32.2 Zero-coupon bond prices
The value at time
t T
of a zero-coupon bond paying $1 at time
T
is
B t; T =IE
"
exp
,
Z
T
t
X
1
u...
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Human Resource Portals and the Protean Career A Three-Factor Model
Ngày tải lên :
24/10/2013, 08:20
... portals. It is
essentially the organizational culture and employee attitudes toward change that
matter.
Organizational Factors
Organizational factors include organizational culture, opportunities ... employees, they may impact the remaining two. For instance, managers may
develop an organizational culture that facilitates the implementation of changes,
and specifically technological changes. To ... technology and particularly the Internet and
the World Wide Web has dramatically changed how organizations operate.
The most far-reaching changes to careers are coming from transformations of
work and...
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Shaking a box of sand I – a simple lattice model
Ngày tải lên :
01/11/2013, 08:20
... transition. As mentioned in an earlier chapter, the
density may attain values that are substantially higher than random close packing,
and quite close to the crystalline limit [131, 132]. An analogous ... investigations.
The model [174] is based on the generalisation of an earlier cellular automaton
(CA) model [22, 75, 83, 165] of an avalanching sandpile. This version of the model
contains only near-neighbour ... very asymmetrically shaped, and there is a strong preferred
orientation, the nonequilibrium regime of granular dynamics will carry all the usual
characteristics of ageing.
Now recall that that...
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64 A Unified Instrumental Variable
Ngày tải lên :
08/11/2013, 12:15
... algorithm can be summarized
as follows:
Assumptions
— A batch of N samples of the array output y(t), that can accurately be
described by the model (64.1) and (64.2) is available. The array is calibrated ... allowed
to be arbitrarily spatially correlated with an unknown covariance matrix. Assumption A3 isawell-
known condition that, under a weak restriction on m, guarantees DOA parameter identifiability ... scenarios, two planar wavefronts arrive from DOAs 0
◦
and 5
◦
relative to the array broadside.
Unless otherwise stated, the emitter signals are zero-mean Gaussian with signal covariance matrix...
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