constructing semantic space models from parsed corpora
Tài liệu Báo cáo khoa học: "Semantic Taxonomy Induction from Heterogenous Evidence" doc
Ngày tải lên :
20/02/2014, 12:20
... COLING-02.
M. Hearst. 1992. Automatic Acquisition of Hyponyms
from Large Text Corpora. Proc. COLING-92.
D. Hindle. 1990. Noun classification from predicate-
argument structures. Proc. ACL-90.
D. Lenat. ... or automatically discov-
ered textual patterns. By contrast, our algorithm
flexibly incorporates evidence from multiple clas-
sifiers over heterogenous relationships to optimize
the entire structure ... (H
ij
|E
H
ij
) is then trained
using logistic regression, predicting the noun-pair
hypernymy label from WordNet from the feature
vector of lexico-syntactic patterns.
The hypernym classifier described above...
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Tài liệu Báo cáo khoa học: "Bilingual Terminology Acquisition from Comparable Corpora and Phrasal Translation to Cross-Language Information Retrieval" pptx
Ngày tải lên :
20/02/2014, 16:20
... Japanese-English language pair,
especially if involving the comparable corpora.
Re-scoring through the Comparable Corpora
Comparable corpora could be considered for the
disambiguation of translation ... comparable corpora- based techniques, re-
spectively compared to the hybrid two-stages com-
parable corpora and linguistics-based pruning.
The proposed approach based on bi-directional
comparable corpora ... TR2-007.
P. Fung. 2000. A Statistical View of Bilingual Lexi-
con Extraction: From Parallel Corpora to Non-Parallel
Corpora. In Jean Veronis, Ed. Parallel Text Process-
ing.
G. Grefenstette. 1999....
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Tài liệu Báo cáo khoa học: "Inducing German Semantic Verb Classes from Purely Syntactic Subcategorisation Information" pdf
Ngày tải lên :
20/02/2014, 21:20
... frequencies range from 8 to
31,710.
Our target classification is based on semantic in-
tuitions, not on our knowledge of the syntactic be-
haviour. As an extreme example, the semantic class
Support ... reliable
enough to serve as proxy for human judgement
(Schulte im Walde, 2002a).
3 German Semantic Verb Classes
Semantic verb classes have been defined for sev-
eral languages, with dominant examples ... containing an expletive es (frame types
including x)? Space limitations allow us only a few
insights.
Clusters (a) and (b) are pure sub-classes of
the semantic verb class Propositional Attitude.
The...
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Tài liệu Báo cáo khoa học: "Effect of Cross-Language IR in Bilingual Lexicon Acquisition from Comparable Corpora" pot
Ngày tải lên :
22/02/2014, 02:20
... Term
Correspondences from Compa-
rable Corpora
Previously studied techniques of estimating bilin-
gual term correspondences from comparable cor-
pora are mostly based on the idea that semantically
similar ... parallel/comparative
corpora. However, the sizes as well as the domain
of existing parallel/comparative corpora are lim-
ited, while it is very expensive to manually col-
lect parallel/comparative corpora. ... translation
knowledge acquisition from parallel/comparative
corpora, various kinds of translation knowledge
are acquired.
Within this framework of translation knowledge
acquisition from WWW news sites, this...
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Tài liệu Báo cáo khoa học: "Generating statistical language models from interpretation grammars in dialogue systems" potx
Ngày tải lên :
22/02/2014, 02:20
... language
modeling: Where do we go from here? In Proceed-
ings of IEEE:88(8).
Rosenfeld R. 2000. Incorporating Linguistic Structure
into Statistical Language Models. In Philosophical
Transactions ... trigram language models
we used the SRI language modelling toolkit (Stol-
cke, 2002) with Good-Turing discounting.
The first model was generated directly from the
MP3 corpus we got from the GF grammar. ... significant improvement. It seems from the tests
that the quality of the data is more important than
the quantity. This makes extraction of domain
data from larger corpora an important issue and
increases...
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Tài liệu Early Atomic Models – From Mechanical to Quantum (1904-1913) pptx
Ngày tải lên :
22/02/2014, 08:20
... α-particles from a metal surface.
The lead plate P is situated between the α-source AB
(an active glass tube) and the detecting screen S
(observed with microscope M). The only path from
source ... apparatus used by Geiger to study α-scattering. In a 2 m evacuated
glass tube, the α-particles from the source R passed through a narrow slit S, producing an
image on the phosphorescent screen ...
one, and then two metal foils. The microscope M could be adjusted to move across the
screen. [From Geiger 1908, p. 174]
35
There had been conflicting interpretations of the experimental...
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Báo cáo khoa học: "Compositional Matrix-Space Models of Language" potx
Ngày tải lên :
07/03/2014, 22:20
... approaches rang-
ing from statistical word space models to
symbolic grammar formalisms.
1 Introduction
In computational linguistics and information re-
trieval, Vector Space Models (Salton et al., ... linguistic models are sub-
sumed by this general idea ranging from purely
symbolic approaches (like type systems and cate-
gorial grammars) to rather statistical models (like
vector space and word space ... sequences
of arbitrary length. This way, abstracting from
specific initial mental state vectors, our semantic
space S can be seen as a function space of mental
transformations represented by matrices,...
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Báo cáo khoa học: "HAL-based Cascaded Model for Variable-Length Semantic Pattern Induction from Psychiatry Web Resources" pdf
Ngày tải lên :
08/03/2014, 02:21
... variable-length semantic
patterns from all possible combinations of words
in the corpora. However, statistical methods may
suffer from data sparseness problem, thus they
require large corpora with ... be-
tween two semantic patterns in the HAL space.
As mentioned earlier, after concept combination,
a semantic pattern becomes a new concept in the
HAL space, which means the semantic pattern ... to annotate
the whole web corpora. Besides, it is also im-
practical to enumerate all possible combinations
of words from the web corpora, and then search
for the semantic patterns.
To address...
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Báo cáo khoa học: "Generalized Algorithms for Constructing Statistical Language Models" pdf
Ngày tải lên :
08/03/2014, 04:22
... .
Class-based models. In many applications, it is nat-
ural and convenient to construct class-based language
models, that is models based on classes of words (Brown
et al., 1992). Such models are ... by as-
signing them some probabilities. There are classical
techniques for constructing language models such as
-
gram models with various smoothing techniques (see
Chen and Goodman (1998) and ... construction of language models. We present
new and efficient algorithms to address these more gen-
eral problems.
Counting. Classical language models are constructed
by deriving statistics from large input...
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Báo cáo khoa học: "Detecting Highly Confident Word Translations from Comparable Corpora without Any Prior Knowledge" doc
Ngày tải lên :
08/03/2014, 21:20
... of bilingual lexicon extraction
from parallel corpora. This assumption should
also be reasonable for many types of comparable
corpora such as Wikipedia or news corpora, which
are topically aligned ... from unrelated English and Ger-
man corpora. In Proceedings of the 37th Annual
458
laxes them by lowering the threshold and expand-
ing the search space by incrementing the max-
imum search space ... efficiently bridge the gap between
languages. That seed lexicon is usually crawled
from the Web or obtained from parallel corpora.
Recently, Li et al. (2011) have proposed an ap-
proach that improves...
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Báo cáo khoa học: "Acquisition of Conceptual Data Models from Natural Language Descriptions" doc
Ngày tải lên :
09/03/2014, 01:20
... ad-hoc semantic grammars specialized
to the application domain. Norton (1982) describes a
program that acquires knowledge of the BASIC
programming language's syntax and semantics from a ... explicit conceptual data models
from natural language text or dialogue is being
investigated. The knowledge brought to bear on this task is
classified into syntactic, semantic and systems analysis ... beth
syntactic and semantic components. As such they are
potential models for the development of interfaces to new
types of software systems. However, their approach
to
semantics cannot be...
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Báo cáo khoa học: "Toolkit for Multi-Level Alignment and Information Extraction from Comparable Corpora" pptx
Ngày tải lên :
16/03/2014, 20:20
... defined in the toolkit: “parallel data
mining from comparable corpora and “named
entity/terminology extraction and mapping from
comparable corpora .
The next section provides a general overview ... mining from
comparable corpora aligns comparable corpora in
the document level (section 2.1). This step is
crucial as the further steps are computationally
intensive. To minimise search space, ... sentence
pairs are extracted from the aligned comparable
corpora (section 2.2).
The workflow for named entity (NE) and
terminology extraction and mapping from
comparable corpora extracts data in...
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Báo cáo khoa học: "The S-Space Package: An Open Source Package for Word Space Models" pdf
Ngày tải lên :
17/03/2014, 00:20
... Benchmarks
Word space benchmarks assess the semantic con-
tent of the space through analyzing the geomet-
ric properties of the space itself. Currently used
benchmarks assess the semantics by inspecting ... information on the algorithms,
code documentation and mailing list archives.
2 Word Space Models
Word space models are based on the contextual
distribution in which a word occurs. This ap-
proach ... approximation, and Word
Sense Induction (WSI) models. Document-based
models divide a corpus into discrete documents
and construct the vector space from word fre-
quencies in the documents. The...
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Báo cáo khoa học: "Semantic Class Learning from the Web with Hyponym Pattern Linkage Graphs" pdf
Ngày tải lên :
17/03/2014, 02:20
... snippet.
Incorporating a noun phrase chunker would elim-
inate some of these cases, but far from all of them.
We concluded that even such a restrictive pattern is
not sufficient for semantic class ... by their
semantic lexicon learner were not present in Word-
Net. Automatic semantic lexicon acquisition could
be used to enhance existing resources such as Word-
Net, or to produce semantic lexicons ... methods have been developed for
automatic semantic class identification, under the
rubrics of lexical acquisition, hyponym acquisition,
semantic lexicon induction, semantic class learn-
ing, and web-based...
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Báo cáo khoa học: "Coreference Resolution Using Semantic Relatedness Information from Automatically Discovered Patterns" pptx
Ngày tải lên :
17/03/2014, 04:20
... senses and semantic relations
are not available from the database (Vieira and Poe-
sio, 2000). In recent years, increasing interest has
been seen in mining semantic relations from large
text corpora. ... to
obtain the semantic relatedness information.
The evaluation on ACE data set shows that
the pattern based semantic information is
helpful for coreference resolution.
1 Introduction
Semantic relatedness ... the same entity should have a certain semantic
relation. To obtain this semantic information, previ-
ous work on reference resolution usually leverages
a semantic lexicon like WordNet (Vieira...
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