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2016 ; 2016
(ä): 7386517
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Stratification-Based Outlier Detection over the Deep Web
#MMPMID27313603
Xian X
; Zhao P
; Sheng VS
; Fang L
; Gu C
; Yang Y
; Cui Z
Comput Intell Neurosci
2016[]; 2016
(ä): 7386517
PMID27313603
show ga
For many applications, finding rare instances or outliers can be more interesting
than finding common patterns. Existing work in outlier detection never considers
the context of deep web. In this paper, we argue that, for many scenarios, it is
more meaningful to detect outliers over deep web. In the context of deep web,
users must submit queries through a query interface to retrieve corresponding
data. Therefore, traditional data mining methods cannot be directly applied. The
primary contribution of this paper is to develop a new data mining method for
outlier detection over deep web. In our approach, the query space of a deep web
data source is stratified based on a pilot sample. Neighborhood sampling and
uncertainty sampling are developed in this paper with the goal of improving
recall and precision based on stratification. Finally, a careful performance
evaluation of our algorithm confirms that our approach can effectively detect
outliers in deep web.