منابع مشابه
Aggregate Estimation Over Dynamic Hidden Web Databases
Many databases on the web are “hidden” behind (i.e., accessible only through) their restrictive, form-like, search interfaces. Recent studies have shown that it is possible to estimate aggregate query answers over such hidden web databases by issuing a small number of carefully designed search queries through the restrictive web interface. A problem with these existing work, however, is that th...
متن کاملHDBTracker: Monitoring the Aggregates On Dynamic Hidden Web Databases
Numerous web databases, e.g., amazon.com, eBay.com, are “hidden” behind (i.e., accessible only through) their restrictive search and browsing interfaces. This demonstration showcases HDBTracker, a web-based system that reveals and tracks (the changes of) userspecified aggregate queries over such hidden web databases, especially those that are frequently updated, by issuing a small number of sea...
متن کاملSearching for Hidden-Web Databases
Recently, there has been increased interest in the retrieval and integration of hidden Web data with a view to leverage high-quality information available in online databases. Although previous works have addressed many aspects of the actual integration, including matching form schemata and automatically filling out forms, the problem of locating relevant data sources has been largely overlooke...
متن کاملInstant Recovery for Main Memory Databases
With the emergence of new hardware technologies, new opportunities arise and existing database architectures have to be rethought to fully exploit them. In particular, recovery mechanisms of current main-memory database systems are tuned to efficiently work on block-oriented, high-latency storage devices. These devices create a bottleneck during transaction processing. In this paper, we investi...
متن کاملRule Mining for Dynamic Databases
Association rules identify associations among data items and were introduced in 1993 by Agarwal et al.. Most of the algorithms to find association rules deal with the static databases. There are very few algorithms that deal with dynamic databases. The most classical algorithm to find association rules in dynamic database is Borders algorithm. This paper presents two modified version of the Bor...
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ژورنال
عنوان ژورنال: Journal of Computer Science and Technology
سال: 2010
ISSN: 1000-9000,1860-4749
DOI: 10.1007/s11390-010-9344-y