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Detecting hotspots in geographic networksBuchin, Kevin ...We study a point pattern detection problem on networks, motivated by geographical analysis tasks, such as crime hotspot detection. Given a network ▫$N$▫ (for example, a street, train, or highway ... network) together with a set of sites which are located on the network (for example, accident locations or crime scenes), we want to find a connected subnetwork ▫$F$▫ of ▫$N$▫ of small total length that contains many sites. That is, we are searching for a subnetwork ▫$F$▫ that spans a cluster of sites which are close with respect to the network distance. We consider different variants of this problem where ▫$N$▫ is either a general graph or restricted to a tree, and the subnetwork ▫$F$▫ that we are looking for is either a simple path, a path with self-intersections at vertices, or a tree. Many of these variants are NP-hard, that is, polynomial-time solutions are very unlikely to exist. Hence we focus on exact algorithms for special cases and efficient algorithms for the general case under realistic input assumptions.Source: Advances in GIScience : proceedings of the 12th AGILE Conference (Str. 217-231)Type of material - conference contributionPublish date - 2009Language - englishCOBISS.SI-ID - 15154521
Author
Buchin, Kevin |
Cabello, Sergio |
Gudmundsson, Joachim |
Löffler, Maarten |
Luo, Jun |
Rote, Günter |
Silveira, Rodrigo I. |
Speckmann, Bettina |
Wolle, Thomas
Topics
teorija grafov |
algoritmi |
analiza omrežij |
NP-zahtevnost |
graph theory |
graph algorithms |
geographic networks |
NP-hardness
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Buchin, Kevin | |
Cabello, Sergio | 25993 |
Gudmundsson, Joachim | |
Löffler, Maarten | |
Luo, Jun | |
Rote, Günter | |
Silveira, Rodrigo I. | |
Speckmann, Bettina | |
Wolle, Thomas |
Source: Personal bibliographies
and: SICRIS
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