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GIS
1997
ACM
15 years 10 months ago
Speeding up Bulk-Loading of Quadtrees
Spatial indexes, such as the PMR quadtree, are important in spatial databases for efficient execution of queries involving spatial constraints, especially when the queries involve...
Gísli R. Hjaltason, Hanan Samet, Yoram J. S...
ECSQARU
1995
Springer
15 years 10 months ago
Parametric Structure of Probabilities in Bayesian Networks
The paper presents a method for uncertainty propagation in Bayesian networks in symbolic, as opposed to numeric, form. The algebraic structure of probabilities is characterized. Th...
Enrique Castillo, José Manuel Gutiér...
ECSQARU
1995
Springer
15 years 10 months ago
Model-Based Diagnostics Using Hints
It is often possible to describe the correct functioning of a system by a mathematical model. As long as observations or measurements correspond to the predictions made by the mod...
Jürg Kohlas, Paul-André Monney, Rolf H...
GIS
1995
ACM
15 years 10 months ago
A Window Retrieval Algorithm for Spatial Databases Using Quadtrees
An algorithm is presented to answer window queries in a quadtree-based spatial database environment by retrieving the covering blocks in the underlying spatial database. It works ...
Walid G. Aref, Hanan Samet
ICLP
1995
Springer
15 years 10 months ago
WAMCC: Compiling Prolog to C
We present the wamcc system, a Prolog compiler that translates Prolog to C via the WAM. This approach has some interesting consequences: simplicity, efficiency, portability, exten...
Philippe Codognet, Daniel Diaz