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» Approximate Periods of Strings
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ADCM
2007
59views more  ADCM 2007»
13 years 8 months ago
Gabor frames by sampling and periodization
By sampling the window of a Gabor frame for L2 (R) belonging to Feichtinger’s algebra, S0(R), one obtains a Gabor frame for l2 (Z). In this article we present a survey of results...
Peter L. Søndergaard
MOC
2000
126views more  MOC 2000»
13 years 7 months ago
Adaptive multilevel methods in space and time for parabolic problems-the periodic case
The aim of this paper is to display numerical results that show the interest of some multilevel methods for problems of parabolic type. These schemes are based on multilevel spatia...
J. B. Burie, M. Marion
BC
1998
96views more  BC 1998»
13 years 7 months ago
Evidence of phase transitions in heart period dynamics
Complexity measures of non-linear dynamics are a useful tool for quantifying observed stretching, folding, scaling and mixing processes in the Takens-reconstructed state space of h...
Henrik Bettermann, Peter Van Leeuwen
IMAMS
2007
115views Mathematics» more  IMAMS 2007»
13 years 9 months ago
Segmenting Periodic Reliefs on Triangle Meshes
Decorative reliefs are widely used for e.g. packaging and porcelain design. In periodic reliefs, the relief repeats a pattern, for example all the way around an underlying surface...
Shenglan Liu, Ralph R. Martin, Frank C. Langbein, ...
FSE
2005
Springer
108views Cryptology» more  FSE 2005»
14 years 1 months ago
Unbiased Random Sequences from Quasigroup String Transformations
Abstract. The need of true random number generators for many purposes (ranging from applications in cryptography and stochastic simulation, to search heuristics and game playing) i...
Smile Markovski, Danilo Gligoroski, Ljupco Kocarev