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Spatio-textual similarity join is a basic and significant operation in many applications. It is an operation that finds all the similar pairs of objects which have similar textual descriptions and are spatially close to each other. With the popularity of GPS and their applications, the size of spatiotextual data is increasing explosively, while the existing methods cannot deal with the spatio-textual...
Flash disks are being widely used as an important alternative to conventional magnetic disks, although accessed through the same interface by applications, their distinguished feature, i.e., different read and write cost in the aspects of time, makes it necessary to reconsider the design of existing replacement algorithms to leverage their performance potential. Different from existing flash-aware...
With increment of personal data amount, how to efficiently manage personal DataSpace(PDS) becomes a serious problem and a hot research topic. In PDS, users often expect to relocate some known items. Therefore how to efficiently identify these known items from a great number of objects becomes an important research issue. To the best of our knowledge, there is no existing works tackling this problem...
Database is an important part of Web information system, the IO performance of which is a key factor of the responsiveness of the whole system. Existing databases usually adopt magnetic disks as storage devices. Now, low IO performance of magnetic disks becomes the bottle neck to the performance of the entire Web information system. Flash memory, as a new electronic storage device, has high read/write...
As a de facto standard for information representation and exchange over the Internet, XML has been used extensively in many applications. And XML query technology has attracted more and more attention in data management research community. Standard XML query languages, e.g. XPath and XQuery, use twig pattern as a basic unit to match relevant fragments from a given XML document. However, in most existing...
Compared with traditional magnetic disks, flash memory has many advantages and has been used as external storage media for a wide spectrum of electronic devices (such as PDA, MP3, digital camera and mobile phone). As the capacity increases and price drops, it looks like a perfect alternative for magnetic disks. However, due to hardware limitations of flash memory, techniques including storage subsystem...
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