confidence driven unsupervised semantic parsing
Tài liệu Báo cáo khoa học: "Transition-based parsing with Confidence-Weighted Classification" pdf
Ngày tải lên :
20/02/2014, 04:20
... kernel with the SVM.
3 Confidence- weighted classification
Dredze et al. (2008) introduce confidence-
weighted linear classifiers which are online-
classifiers that maintain a confidence parameter
for ... expected given
their online-nature. We also see that parsing is
much faster.
SVM CW
Training 75 min 8 min
Parsing 29 min 1.5 min
Table 1: Training and parsing time on Danish data.
5.3 Pruning features
Because ... this
by having a confidence- parameter for each weight,
modeled by a Gaussian distribution, and this pa-
rameter is used to make more aggressive updates
on weights with lower confidence (Dredze...
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Tài liệu Báo cáo khoa học: "Semantic Parsing with Bayesian Tree Transducers" doc
Ngày tải lên :
19/02/2014, 19:20
... transducers,
producing state-of-the-art semantic parsing re-
sults while remaining applicable to any do-
main employing probabilistic tree transducers.
1 Introduction
Semantic parsing is the task of mapping ... three-fold: we
present a new state-of-the-art semantic parsing
model, propose a broader theory for tree transforma-
tion based semantic parsing, and present a general
inference algorithm for ... decoding when we want to infer
the input given the output.
4 A generative model of semantic parsing
Like the hybrid tree semantic parser (Lu et al., 2008)
and the synchronous grammar based WASP (Wong
and...
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Tài liệu Báo cáo khoa học: "Unsupervised Semantic Role Induction with Global Role Ordering" doc
Ngày tải lên :
19/02/2014, 19:20
... ordering.
1 Introduction
Unsupervised semantic role induction has gained
significant interest recently (Lang and Lapata,
2011b) due to limited amounts of annotated corpora.
A Semantic Role Labeling ... ]
A1
(b.) [ The car ]
A1
was driven by [ Mark ]
A0
This simple example also shows that while certain
local syntactic and semantic features could provide
clues to the semantic role label of a constituent, ... 145–149,
Jeju, Republic of Korea, 8-14 July 2012.
c
2012 Association for Computational Linguistics
Unsupervised Semantic Role Induction with Global Role Ordering
Nikhil Garg
University of Geneva
Switzerland
nikhil.garg@unige.ch
James...
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Tài liệu Báo cáo khoa học: "A Method for Measuring Machine Translation Confidence" docx
Ngày tải lên :
20/02/2014, 04:20
... application of confidence score in the n-
best list reranking task, we propose a method to visual-
ize translation error using confidence scores. Our pur-
pose is to visualize word and sentence-level confidence
scores ... Section 4 indicate that the
proposed confidence measure has a high correlation
with HTER. However, it is not very clear if the core MT
system can benefit from confidence measure by provid-
ing better ... hypotheses and for
each hypothesis we compute sentence-level confidence
scores. The best candidate is the hypothesis with high-
est confidence score. Table 3 shows the performance of
reranking systems...
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Tài liệu Báo cáo khoa học: "Neutralizing Linguistically Problematic Annotations in Unsupervised Dependency Parsing Evaluation" doc
Ngày tải lên :
20/02/2014, 04:20
... 2010. Unsupervised
Induction of Tree Substitution Grammars for Depen-
dency Parsing. In Proc. of EMNLP.
Shay B. Cohen, Kevin Gimpel and Noah A. Smith, 2008.
Logistic Normal Priors for Unsupervised ... HLT-NAACL.
Michael J. Collins, 1999. Head -driven statistical models
for natural language parsing. Ph.D. thesis, University
of Pennsylvania, Philadelphia.
Alexander Clark, 2001. Unsupervised language acquisi-
tion: ... would like to have
a proper evaluation of unsupervised parsing algo-
rithms against a gold standard.
The first way was to modify the parameters of the
parsing algorithms so that in cases where...
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Tài liệu Báo cáo khoa học: "Fast Unsupervised Incremental Parsing" pdf
Ngày tải lên :
20/02/2014, 12:20
... be fast, parsing (on a 1.86GHz
Centrino laptop) at a rate of around 4000 words/sec.
and learning (including parsing) at a rate of 3200 –
3600 words/sec. The effect of sentence length on
parsing ... paper.
References
Rens Bod. 2006a. An all-subtrees approach to unsuper-
vised parsing. In Proceedings of COLING-ACL 2006.
Rens Bod. 2006b. Unsupervised parsing with U-DOP.
In Proceedings of CoNLL 10.
Alexander Clark. ... re-
mains, therefore, valid.
Table 1 gives two baselines and the parsing re-
sults for WSJ10, WSJ40, Negra10 and Negra40
for recent unsupervised parsing algorithms: CCM
2
I also tested the incremental...
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Tài liệu Báo cáo khoa học: "Performance Confidence Estimation for Automatic Summarization" ppt
Ngày tải lên :
22/02/2014, 02:20
... Greece, 30 March – 3 April 2009.
c
2009 Association for Computational Linguistics
Performance Confidence Estimation for Automatic Summarization
Annie Louis
University of Pennsylvania
lannie@seas.upenn.edu
Ani ... properties of document clusters can be
used to identify difficult inputs.
The task of predicting the confidence in system
performance for a given input is in fact relevant not
only for summarization, ... question answering for example, a system may
be configured not to answer questions for which
the confidence of producing a correct answer is
low, and in this way increase the overall accuracy
of...
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Báo cáo khoa học: "Balancing User Effort and Translation Error in Interactive Machine Translation Via Confidence Measures" pot
Ngày tải lên :
07/03/2014, 22:20
... word is classified as correct if
its confidence exceeds a word classification
threshold τ
w
.
c
R
(e
I
1
) =
|{e
i
/ c
w
(e
i
) > τ
w
}|
I
(5)
After computing the confidence value, each sen-
tence ... and N. Ueffing.
2003. Confidence estimation for machine transla-
tion.
J. Blatz, E. Fitzgerald, G. Foster, S. Gandrabur,
C. Goutte, A. Kuesza, A. Sanchis, and N. Ueffing.
2004. Confidence estimation ... Application of word-
level confidence measures in interactive statistical
machine translation. In Proc. EAMT, pages 262–
270.
N. Ueffing and H. Ney. 2007. Word-level confidence
estimation for machine...
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Báo cáo khoa học: "Mapping between Compositional Semantic Representations and Lexical Semantic Resources: Towards Accurate Deep Semantic Parsing" docx
Ngày tải lên :
08/03/2014, 01:20
... Computational Linguistics
Mapping between Compositional Semantic Representations and Lexical
Semantic Resources: Towards Accurate Deep Semantic Parsing
Sergio Roa†‡, Valia Kordoni† and Yi Zhang†
Dept. ... representations and lexical semantic
resources. A probabilistic model comprising
Minimal Recursion Semantics (MRS) struc-
tures and lexicalist oriented semantic features
is acquired. Lexical semantic roles ... reliable and benefi-
cial to deep parsing.
2 Minimal Recursion Semantics
The semantic representation we are interested in
in this paper is the Minimal Recursion Semantics
(MRS). Because of its...
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Báo cáo khoa học: "A Study on Convolution Kernels for Shallow Semantic Parsing" pdf
Ngày tải lên :
08/03/2014, 04:22
... even
if preliminary experiments on automatic seman-
tic shallow parsing of PropBank have shown no
important differences versus semantic parsing
which adopts Gold Standard parse-trees.
5 Conclusions
In ... features. The results have shown that:
First, SVMs using the above kernels are ap-
pealing for semantically parsing both corpora.
Second, PAF and SCF can be used to improve
automatic classification ... for parsing and tagging: Kernels over
discrete structures, and the voted perceptron. In
proceeding of ACL-02.
Michael Collins. 1997. Three generative, lexicalized
models for statistical parsing. ...
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Báo cáo khoa học: "FROM STRUCTURE-DRIVEN SEPARATE SEMANTIC GENERATION REPRESENTATIONS" ppt
Ngày tải lên :
09/03/2014, 01:20
... of these rulcs is
to explicitly relate the semantic (sub)structures to
possible syntactic counterparts. The rnappizJg pro-
cess is driven by the semantic input structure that
is traversed ... guided by semantic informa-
tion in a top-down fashion.
The benefits of integrated semantics are mani-
fold. Elegant analyses of linguistic phenomena are
possible that relate syntactic and semantic ... top-down genera-
tots using an integrated semantics cannot occur
in the separate-semantics approach. Expansion of
grammar rules can be controlled by the semantic
representation if each rule application...
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Báo cáo khoa học: "Head-driven Transition-based Parsing with Top-down Prediction" pdf
Ngày tải lên :
16/03/2014, 19:20
... Conclusion
This paper presents a novel head -driven parsing al-
gorithm and empirically shows that it is as practi-
cal as other dependency parsing algorithms. Our
head -driven parser has potential for handling ... proposed algo-
rithm achieves comparable results with other
data -driven dependency parsing algorithms.
1 Introduction
Transition-based parsing algorithms, such as shift-
reduce algorithms (Nivre, ... top-down head-
driven transition-based parsing algorithm which can
parse complex structures that are not trivial for shift-
reduce parsers. The deductive system is very similar
to Earley parsing (Earley,...
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Báo cáo khoa học: "Confidence-Weighted Learning of Factored Discriminative Language Models" pptx
Ngày tải lên :
17/03/2014, 00:20
... POS features,
confidence- weighted learning is slightly better than
perceptron, and confidence- weighted learning with
soft margin is the best (9.08% and 5.04% better than
perceptron and confidence- weighted ... language mod-
els.
(DLM 0) or factored features by standard percep-
tron (DLM 1), confidence- weighted learning (DLM
2) and confidence- weighted learning with soft mar-
gin (DLM 3). All discriminative language ... dataset, we trained dis-
criminative language models by standard percep-
tron, confidence- weighted learning and confidence-
weighted learning with soft margin.
We then trained the weights of a...
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Báo cáo khoa học: "Confidence Measure for Word Alignment" potx
Ngày tải lên :
17/03/2014, 01:20
... links from dif-
ferent alignments.
3 Alignment Link Confidence Measure
3.1 Definition
Similar to the sentence alignment confidence mea-
sure, the confidence of an alignment link a
ij
in the
sentence ... area, most research on
confidence measure focus on the confidence of
MT output: how accurate a translated sentence is.
(Gandrabur and Foster, 2003) used neural-net to
improve the confidence estimate ... for
sentence and word confidence estimation. (Quirk,
2004) trained a sentence level confidence mea-
sure using a human annotated corpus. (Bach et
al., 2008) used the sentence-pair confidence scores
estimated...
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Báo cáo khoa học: "Active Learning with Confidence" doc
Ngày tải lên :
17/03/2014, 02:20
... margin it has
low confidence compared to the second. Both the
margin value and confidence should be considered
in choosing which example to label.
We present active learning with confidence us-
ing ... margin
(Tong and Koller, 2001). Common intuition equates
large margins with high prediction confidence.
However, confidence and margin are two distinct
properties. For example, an instance may receive
a ... We present a method for in-
corporating confidence into the margin by us-
ing a newly introduced online learning algo-
rithm and show empirically that confidence
improves active learning.
1 Introduction
Successful...
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