236 search results - page 22 / 48 » Model of primary and secondary context |
PERCOM
2009
ACM
14 years 4 months ago
2009
ACM
—The primary function of a cognitive radio is to detect idle frequencies or sub-bands, not used by the primary users (PUs), and allocate these frequencies to secondary users. The...
JSAC
2008
13 years 9 months ago
2008
We propose the cross-layer based opportunistic multi-channel medium access control (MAC) protocols, which integrate the spectrum sensing at physical (PHY) layer with the packet sch...
TFS
2008
2008
Type-2 Fuzzy Markov Random Fields and Their Application to Handwritten Chinese Character Recognition
13 years 9 months ago
In this paper, we integrate type-2 (T2) fuzzy sets with Markov random fields (MRFs) referred to as T2 FMRFs, which may handle both fuzziness and randomness in the structural patter...
BMCBI
2007
13 years 10 months ago
2007
Background: RNA interference (RNAi) is a naturally occurring phenomenon that results in the suppression of a target RNA sequence utilizing a variety of possible methods and pathwa...
DIGRA
2003
Springer
14 years 3 months ago
2003
Springer
Most modern graphics-based computer games entertain the player in part by presenting him or her with a simulated space, an imaginary two- or threedimensional region whose visual a...