166 search results - page 8 / 34 » Selectivity Estimation for Spatial Joins |
WWW
2008
ACM
14 years 7 months ago
2008
ACM
In this paper, we formalize the problem of Basic Graph Pattern (BGP) optimization for SPARQL queries and main memory graph implementations of RDF data. We define and analyze the c...
SCALESPACE
2007
Springer
14 years 1 months ago
2007
Springer
In this work, we address the problem of segmenting multiple objects, under possible occlusions, in a level set framework. A variational energy that incorporates a piecewise constan...
TSP
2008
13 years 7 months ago
2008
Abstract--This paper offers a new technique for spatially adaptive estimation. The local likelihood is exploited for nonparametric modeling of observations and estimated signals. T...
SIGMOD
2006
ACM
14 years 7 months ago
2006
ACM
Recent data stream systems such as TelegraphCQ have employed the well-known property of duality between data and queries. In these systems, query processing methods are classified...
SIGMOD
2009
ACM
14 years 7 months ago
2009
ACM
With the proliferation of the RDF data format, engines for RDF query processing are faced with very large graphs that contain hundreds of millions of RDF triples. This paper addre...