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IPL
2008
61views more  IPL 2008»
14 years 10 months ago
Online chasing problems for regular polygons
We consider a server location problem with only one server to move. In this paper we assume that a request is given as a region and that the service can be done anywhere inside th...
Hiroshi Fujiwara, Kazuo Iwama, Kouki Yonezawa
78
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JCO
2008
117views more  JCO 2008»
14 years 10 months ago
Approximation algorithms for connected facility location problems
We study Connected Facility Location problems. We are given a connected graph G = (V, E) with nonnegative edge cost ce for each edge e E, a set of clients D V such that each cli...
Mohammad Khairul Hasan, Hyunwoo Jung, Kyung-Yong C...
CSDA
2007
109views more  CSDA 2007»
14 years 10 months ago
Improving the computation of censored quantile regressions
Abstract. Censored quantile regressions (CQR) are a valuable tool in economics and engineering. The computation of estimators is highly complex and the performance of standard meth...
Bernd Fitzenberger, Peter Winker
DM
2007
84views more  DM 2007»
14 years 10 months ago
Matroids on convex geometries (cg-matroids)
We consider matroidal structures on convex geometries, which we call cg-matroids. The concept of a cg-matroid is closely related to but different from that of a supermatroid intro...
Satoru Fujishige, Gleb A. Koshevoy, Yoshio Sano
86
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KER
2008
88views more  KER 2008»
14 years 10 months ago
Ontology change: classification and survey
Ontologies play a key role in the advent of the Semantic Web. An important problem when dealing with ontologies is the modification of an existing ontology in response to a certai...
Giorgos Flouris, Dimitris Manakanatas, Haridimos K...