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COMPUTING
2008
174views more  COMPUTING 2008»
15 years 6 months ago
Multilevel algorithms for Rannacher-Turek finite element approximation of 3D elliptic problems
Generalizing the approach of a previous work [15] the authors present multilevel preconditioners for three-dimensional (3D) elliptic problems discretized by a family of Rannacher ...
Ivan Georgiev, Johannes Kraus, Svetozar Margenov
CORR
1999
Springer
222views Education» more  CORR 1999»
15 years 6 months ago
Analysis of approximate nearest neighbor searching with clustered point sets
Abstract. Nearest neighbor searching is a fundamental computational problem. A set of n data points is given in real d-dimensional space, and the problem is to preprocess these poi...
Songrit Maneewongvatana, David M. Mount
ISBI
2004
IEEE
16 years 7 months ago
Search Space Partitioning Using Convex Hull and Concavity Features for Fast Medical Image Retrieval
A new approach is presented for partitioning an image database by classifying and indexing the convex hull shapes and the number of region concavities. The result is a significant...
Phillip Mlsna, Nikolay Sirakov
GLOBECOM
2008
IEEE
16 years 23 days ago
Performance Analysis of Free-Space Optical Systems in Gamma-Gamma Fading
— Atmospheric turbulence induced fading is one of the main impairments affecting free–space optics (FSO). In recent years, Gamma–Gamma fading has become the dominant fading m...
Ehsan Bayaki, Robert Schober, Ranjan K. Mallik
VTC
2008
IEEE
153views Communications» more  VTC 2008»
16 years 20 days ago
Symbol Error Rate of Space-Time Coded Multi-Antenna Wireless Cooperative Networks
—In this paper, we propose a generalized cooperative signal transmission model for wireless networks. In this model, the source, the destination, and an arbitrary number of relay...
Javad Vazifehdan, Jos H. Weber