hidden markov model information retrieval system
Báo cáo khoa học: "Optimizing Language Model Information Retrieval System with Expectation Maximization Algorithm" doc
Ngày tải lên :
08/03/2014, 01:20
... Relating the new lan-
guage models of information retrieval to the tradi-
tional retrieval models: University of Twente
[Host]; University of Twente, Centre for Telemat-
ics and Information Technology, ... T. Leek, and R. M. Schwartz, "A
hidden Markov model information retrieval sys-
tem," 1999, pp. 214-221.
E. M. Voorhees, "The TREC robust retrieval track,"
2005, pp. 11-20. ... to
the output distribution of the state.
Figure 1. HMM proposed in “A Hidden Markov
Model Information Retrieval System
To estimate the transition and observation
probabilities of HMM,...
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Báo cáo khoa học: "Techniques to incorporate the benefits of a Hierarchy in a modified hidden Markov model" pptx
Ngày tải lên :
08/03/2014, 02:21
... in
structure between hidden Markov models
(HMM) and hierarchical hidden Markov
models (HHMM). The HHMM structure
allows repeated parts of the model to be
merged together. A merged model takes
advantage ... natu-
ral language, hidden Markov models.
1 Introduction
Hidden Markov models (HMMs) were introduced
in the late 1960s, and are widely used as a prob-
abilistic tool for modeling sequences of ... Introduction
to Hidden Markov Models. IEEE Acoustics Speech
and Signal Processing ASSP Magazine, ASSP-3(1):
4–16, January.
M. Skounakis, M. Craven and S. Ray. 2003. Hi-
erarchical Hidden Markov Models for Information
Extraction....
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Tài liệu Báo cáo khoa học: "A Pronoun Anaphora Resolution System based on Factorial Hidden Markov Models" docx
Ngày tải lên :
20/02/2014, 04:20
... paper presents a supervised pronoun
anaphora resolution system based on factorial
hidden Markov models (FHMMs). The ba-
sic idea is that the hidden states of FHMMs
are a n explicit short-term memory ... an te cedent from the hidden buffer, or in
terms of a generative model, the entries in the
hidden buffer generate the corresponding pro-
nouns. A system implementing this model is
evaluated on ... 2011.
c
2011 Association for Computational Linguistics
A Pronoun Anaphora Resolution System based on
Factorial Hidden Markov Models
Dingcheng Li
University of Minnesota,
Twin Cities, Minnesosta
lixxx345@umn.edu
Tim...
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Tài liệu Báo cáo khoa học: "Hidden Markov Tree Model in Dependency-based Machine Translation∗" pptx
Ngày tải lên :
20/02/2014, 09:20
... pro-
cessing using hidden markov models. IEEE Trans-
actions on Signal Processing, 46(4):886–902.
Michelangelo Diligenti, Paolo Frasconi, and Marco
Gori. 2003. Hidden tree Markov models for doc-
ument ... to Hid-
den Markov Tree Models (HMTM), which
are to our knowledge still unexploited in
the field of Computational Linguistics, in
spite of highly successful Hidden Markov
(Chain) Models. In dependency ... that
the independence assumptions made by Markov
Tree Models can be useful for modeling syntactic
trees. Especially, they fit dependency trees well,
because these models assume conditional depen-
dence...
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Tài liệu Risk Management Guide for Information Technology SystemsRecommendations ppt
Ngày tải lên :
22/01/2014, 02:20
... future IT system. System design documents and
the system security plan can provide useful information about the security of an IT system that is
in development.
For an operational IT system, ...
• System interfaces (e.g., internal and external connectivity)
• Data and information
• Persons who support and use the IT system
• System mission (e.g., the processes performed by the IT system) ... mailings)
• Information Assurance Vulnerability Alerts and bulletins for military systems
• System software security analyses.
3.3.2 System Security Testing
Proactive methods, employing system...
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Nghiên cứu phương pháp mở rộng truy vấn trong truy xuất thông tin (INFORMATION RETRIEVAL)
Ngày tải lên :
17/02/2014, 08:47
... trong truy xuất thông tin
1.1.1 Hệ thống truy xuất thông tin (Information Retrieval- IR)
Hệ thống Truy xuất thông tin (Information Retrieval) là hệ thống thực hiện tìm
kiếm tài liệu (thường là ... trên ontology và kết hợp với hệ thống truy
xuất thông tin (Query Expansion Model with Ontology-Based with
Information Retrieval,
+IR
OB
QEM
)
- Mô hình mở rộng truy vấn dựa trên ontolgy kết ... xác xuất và tích hợp hệ
thống truy xuất thông tin (Query Expansion Model with Ontology-Based and
Probability with Information Retrieval,
+IR
OB P
QEM
)
2.4.2.2 Các bước thực hiện mở rộng...
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Tài liệu Báo cáo khoa học: "A study of Information Retrieval weighting schemes for sentiment analysis" doc
Ngày tải lên :
20/02/2014, 04:20
... therefore
df
i,j
= 0 .
3.3 SMART and BM25 tf.idf variants
The SMART retrieval system by Salton (1971) is
a retrieval system based on the vector space model
(Salton and McGill, 1986). Salton and Buckley
(1987) ... probabilistic model of information retrieval: de-
velopment and comparative experiments. Inf. Pro-
cess. Manage., 36(6):779–808.
Chenghua Lin and Yulan He. 2009. Joint senti-
ment/topic model for ... Robertson et al., 1996) is a probabilistic
model for information retrieval and is one of the
most popular and effective algorithms used in in-
formation retrieval. For ease of reference, we in-
corporate...
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Tài liệu Báo cáo khoa học: "Kinds of Features for Chinese Opinionated Information Retrieval" pdf
Ngày tải lên :
20/02/2014, 12:20
... the information
retrieval (IR) paradigm which has also been used by
some researchers.
Several sentiment information retrieval models
were proposed in the framework of probabilistic lan-
guage models ... of
Opinionated Information Retrieval which is planned
to be a module in a Cross-Language Opinion Extrac-
tion system (CLOE). The main goal of this system is
to provide access to opinionated information ... Ming
Zhou. 2000. On the use of words and n-grams
for Chinese information retrieval. In Proceedings of
the 5th International Workshop Information Retrieval
with Asian Languages, pages 141–148. ACM Press,
November.
Bo...
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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
... was used to evaluate the proposed strategies in
CLIR. SMARTinformation retrieval system (Salton,
1971), which is based on vector space model, was
used to retrieve English documents.
Thus, Content ... Corpora
to Cross-Language Information Retrieval: Hybrid
Statistics-based and Linguistics-based Approach. In
Proc. IRAL 2003, Sapporo, Japan.
G. Salton. 1971. The SMART Retrieval System, Experi-
ments ... and schemes
of SMARTretrieval system for documents terms and
query terms. The best performance was realized by
ATN.NTC combined weighting scheme.
The proposed two-stages model using comparable
corpora...
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Tài liệu Báo cáo khoa học: "Summarization-based Query Expansion in Information Retrieval" doc
Ngày tải lên :
20/02/2014, 18:20
... combination
of alternative retrieval methods, creating a meta-
search strategy which maximizes the contribution of
each stream. Different information retrieval systems
can used as indexing ... "Natural Language Information
Retrieval: TREC°5 Report." Proceedings of TREC-5 confer°
ence.
Strzalkowski, Tomek. 1995. "Natural Language Information Re-
trieval" Information Processing ... most relevant for generating summaries in contex~
of an information retrieval system.
1. Words and phrases frequergly occurring in a tex~
are likely to be indicative...
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