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CORR
2006
Springer
135views Education» more  CORR 2006»
13 years 8 months ago
An equilibrium model for matching impatient demand and patient supply over time
We present a simple dynamic equilibrium model for an online exchange where both buyers and sellers arrive according to a exogenously defined stochastic process. The structure of t...
Garud Iyengar, Anuj Kumar
HT
2009
ACM
14 years 2 months ago
Statistical properties of inter-arrival times distribution in social tagging systems
Folksonomies provide a rich source of data to study social patterns taking place on the World Wide Web. Here we study the temporal patterns of users’ tagging activity. We show t...
Andrea Capocci, Andrea Baldassarri, Vito Domenico ...
ISSAC
2001
Springer
123views Mathematics» more  ISSAC 2001»
14 years 15 days ago
A probabilistic algorithm to test local algebraic observability in polynomial time
The following questions are often encountered in system and control theory. Given an algebraic model of a physical process, which variables can be, in theory, deduced from the inp...
Alexandre Sedoglavic
IWOCA
2010
Springer
232views Algorithms» more  IWOCA 2010»
13 years 2 months ago
Computing Role Assignments of Proper Interval Graphs in Polynomial Time
A homomorphism from a graph G to a graph R is locally surjective if its restriction to the neighborhood of each vertex of G is surjective. Such a homomorphism is also called an R-r...
Pinar Heggernes, Pim van 't Hof, Daniël Paulu...
IJON
2007
118views more  IJON 2007»
13 years 8 months ago
CATS benchmark time series prediction by Kalman smoother with cross-validated noise density
This article presents the winning solution to the CATS time series prediction competition. The solution is based on classical optimal linear estimation theory. The proposed method...
Simo Särkkä, Aki Vehtari, Jouko Lampinen