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COMBINATORICS
1999
85views more  COMBINATORICS 1999»
13 years 8 months ago
Permutation Patterns and Continued Fractions
We find, in the form of a continued fraction, the generating function for the number of (132)-avoiding permutations that have a given number of (123) patterns, and show how to ext...
Aaron Robertson, Herbert S. Wilf, Doron Zeilberger
DM
1999
122views more  DM 1999»
13 years 8 months ago
Parking functions, valet functions and priority queues
We construct a bijection between labeled trees and allowable pairs of permutations sorted by a priority queue. These are also the pairs of permutations that avoid the pattern pairs...
Julian D. Gilbey, Louis H. Kalikow
MICCAI
2005
Springer
14 years 9 months ago
Cross Entropy: A New Solver for Markov Random Field Modeling and Applications to Medical Image Segmentation
This paper introduces a novel solver, namely cross entropy (CE), into the MRF theory for medical image segmentation. The solver, which is based on the theory of rare event simulati...
Jue Wu, Albert C. S. Chung
SIGMOD
2008
ACM
118views Database» more  SIGMOD 2008»
14 years 9 months ago
Freebase: a collaboratively created graph database for structuring human knowledge
Freebase is a practical, scalable tuple database used to structure general human knowledge. The data in Freebase is collaboratively created, structured, and maintained. Freebase c...
Kurt D. Bollacker, Colin Evans, Praveen Paritosh, ...
VL
2007
IEEE
108views Visual Languages» more  VL 2007»
14 years 3 months ago
A PROLOG-based Approach to Representing and Querying Software Engineering Models
Striving toward the vision of Model Driven development (MDD), we face many open questions connected to the elementary tasks involved in working with models. Probably the most basi...
Harald Störrle