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ICIAR
2005
Springer
15 years 12 months ago
Estimating the Natural Number of Classes on Hierarchically Clustered Multi-spectral Images
Image classification is often used to extract information from multi-spectral satellite images. Unsupervised methods can produce results well adjusted to the data, but that are us...
André R. S. Marçal, Janete S. Borges
LAWEB
2005
IEEE
16 years 1 days ago
Optimized Index Structures for Querying RDF from the Web
Storing and querying Resource Description Framework (RDF) data is one of the basic tasks within any Semantic Web application. A number of storage systems provide assistance for th...
Andreas Harth, Stefan Decker
SSDBM
1998
IEEE
101views Database» more  SSDBM 1998»
15 years 10 months ago
Specifications for Efficient Indexing in Spatiotemporal Databases
: A new issue that arises in modern applications involves the efficient manipulation of (static or moving) spatial objects, and the relationships among them. As a result, modern da...
Yannis Theodoridis, Timos K. Sellis, Apostolos Pap...
VLDB
1992
ACM
129views Database» more  VLDB 1992»
15 years 10 months ago
Extensible Buffer Management of Indexes
Most extensibledatabasesystemssupportaddition of new indexes or new data types. However, the referencepatterns exhibited by these new indexes may not be efficiently supportedby ex...
Chee Yong Chan, Beng Chin Ooi, Hongjun Lu
EMNLP
2006
15 years 7 months ago
Entity Annotation based on Inverse Index Operations
Entity annotation involves attaching a label such as `name' or `organization' to a sequence of tokens in a document. All the current rule-based and machine learningbased...
Ganesh Ramakrishnan, Sreeram Balakrishnan, Sachind...