information retrieval from the web
Tài liệu Báo cáo khoa học: "Extraction and Approximation of Numerical Attributes from the Web" pdf
Ngày tải lên :
20/02/2014, 04:20
... each kind. These patterns are the only
attribute-specific resource in our framework.
Value extraction. The first pattern group,
P
values
, allows extraction of the attribute values
from the Web. All ... width 1.695m]’). We then extract new pat-
terns from the retrieved search engine snippets and
re-query the Web with the new patterns to obtain
more attribute values.
We provided the framework with ... value for the given
object. During the first stage it is possible that
we directly extract from the text a set of values
for the requested object. The bounds processing
step rejects some of these...
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Tài liệu Báo cáo khoa học: "Automatic Collection of Related Terms from the Web" pptx
Ngày tải lên :
20/02/2014, 16:20
... query is a term, its hit
is the number of pages that contain the term on the
Web. We use the following notation.
H(x)= the number of pages that contain
the term x”
The number H (x) can be used ... half
(Evaluation II) in Table 2 shows the result.
S: the target term was collected by the system.
F: the target term was removed in the filtering step.
A: the target term existed in the compiled corpus,
but ... automatic term extrac-
tion.
C: the target term existed in the collected web
pages, but did not exist in the compiled corpus.
R: the target term did not exist on the collected web
pages.
Only 43 terms...
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Báo cáo khoa học: "A DOM Tree Alignment Model for Mining Parallel Data from the Web" doc
Ngày tải lên :
08/03/2014, 02:21
...
that, using the new web mining scheme, the web
mining throughput is increased by 32%; (ii) The
quality of the mined data is improved. By lever-
aging the web pages’ HTML structures, the sen-
tence ... English-Chinese parallel data
from the web. The mining procedure is initiated
by acquiring Chinese website list.
We have downloaded about 300,000 URLs of
Chinese websites from the web directories at ...
(1) Given a web site, the root page and web
pages directly linked from the root page are
downloaded. Then for each of the
downloaded web page, all of its anchor texts
(i.e. the hyperlinked...
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Báo cáo khoa học: "Automatic Acquisition of Ranked Qualia Structures from the Web" potx
Ngày tải lên :
08/03/2014, 02:21
... coefficient (Web- Jac), the Pointwise
Mutual Information (Web- PMI) and the conditional
probability (Web- P). We also present a version of
the conditional probability which does not use the
Web but merely ... (not calculated over
the Web) as well as the conditional probability cal-
culated over the Web (Web- P) delivered the best re-
sults, while the PMI-based ranking measure yielded
the worst results. ... appropriate
queries to the web search engine and choosing the
article leading to the highest number of results. The
corresponding patterns are then matched in the 50
snippets returned by the search engine...
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Báo cáo khoa học: " Paraphrase Generation and Information Retrieval from Stored Text" pdf
Ngày tải lên :
16/03/2014, 19:20
... (16) below:
The dog bit the postman. (16a)
The dog bit the postman on the hand. (16b)
The dog with fangs bit the postman
on the hand. (16c)
The relationships which obtain between these sentences ... and if the second keyword falls in the ith
sentence from the first keyword, then the third keyword
must fall within n-i sentences of either of the previous
keywords, or between them. In theory ... This is to say, the longer the segment, the
more unelicited information will appear in the response;
the shorter the segment, the more elicited information
will not appear in the response. It...
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Báo cáo khoa học: "Mining Parenthetical Translations from the Web by Word Alignment" potx
Ngày tải lên :
17/03/2014, 02:20
... our modified version of the competitive link-
ing algorithm, the link score of a pair of words is
the sum of the φ
2
scores of the words themselves,
their prefixes and their suffixes.
In addition ...
pairs, where the translation of the in-parenthesis
terms is a suffix of the pre-parenthesis text. The
lengths and frequency counts of the suffixes have
been used to determine what is the translation ... C ≥ 2 E + K, where C is the length of the
Chinese text, E is the length of the English text in
the parentheses and K is a constant (we used K=6
in our experiments). The lengths C and E are...
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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
... hyponym patterns to
extract class instances from the web and then evalu-
ates them further by computing mutual information
scores based on web queries.
The work by (Widdows and Dorow, 2002) on lex-
ical ... to instantiate the pattern. On the
first iteration, the pattern is given to Google as a
web query, and new class members are extracted
from the retrieved text snippets. We wanted the
system to ... progresses. Initially, the seed is the only
trusted class member and the only vertex in the
graph. The bootstrapping process begins by instan-
tiating the doubly-anchored pattern with the seed
class...
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Tài liệu How to use the Web to look up information on hacking ppt
Ngày tải lên :
23/12/2013, 19:15
... to the Web sites listed at the end of this
Guide. Not only do they carry archives of these Guides, they carry a lot of other valuable
information for the newbie hacker, as well as links to other ... some people take the shortcut into hacking. They get their phriends to give them a
bunch of canned break-in programs. Then they try them on one computer after another until they
stumble into ... other technical
documents from the Web. Besides, the Web stuff is free! <Geek mode off>
The most fantastic Web resource for the aspiring geek, er, hacker, is the RFCs. RFC stands for
"Request...
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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
... through the WWW
The WWW can be considered as an exemplar lin-
guistic resource for decision-making (Grefenstette,
1999). In the present study, the WWW is exploited
in order to re-score the set ... a
phrasal translation. We follow the same steps as the
WWW-based technique, replacing the WWW by a
test collection and a retrieval system to index docu-
ments of the test collection.
NTCIR test ... solve the problem of phrasal translation.
The interactive environment setting should optimize
the phrasal translation, select best phrasal transla-
tion alternatives and facilitate the information...
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Báo cáo khoa học: "The Role of Information Retrieval in Answering Complex Questions" ppt
Ngày tải lên :
08/03/2014, 02:21
... one million news ar-
ticles from the Associated Press, the New York
Times, and the Xinhua News Agency.
3 Document Retrieval
Since information retrieval systems supply the ini-
tial set of documents ... properties of the
document containing the sentence and properties
of the sentence itself. Regarding the former type,
two features come into play: the relevance score
of the document (from the IR engine) ... Introduction
The field of question answering arose from the
recognition that the document does not occupy a
privileged position in the space of information ob-
jects as the most ideal unit of retrieval. ...
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Báo cáo khoa học: "Examining the Content Load of Part of Speech Blocks for Information Retrieval" pptx
Ngày tải lên :
08/03/2014, 02:21
... ad-hoc task of the 1999
Web track, for the WT2G test collection, and
the queries 451-500 from the ad-hoc task of the
2000 Web track, for the WT10G test collection,
with their respective relevance ... We test these hypothe-
ses in the context of Information Retrieval,
by syntactically representing queries, and
removing from them content-poor blocks,
in line with the aforementioned hypothe-
ses. ... in the DFR weighting schemes,
where BB2 and PL2 improved the most from our
hypothesised noise reduction in the queries, while
DLH improved the least, is no longer valid. The
improvement in retrieval...
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