Abstract
Formulating the minimum concave cost capacitated network flow problem as an integer concave minimization problem, we establish finite branch and bound algorithms, in which the branching operation is the so-called integral rectangular partition and the bounding procedure is performed by the classical minimum linear cost flow problem on subnetworks. For the special case that the flow cost function is concave on a fixed number of arcs and linear on the others, an upper bound of the running time is given.
Zusammenfassung
Es wird das Problem eines kostenminimalen Flusses auf Netzwerken mit konkaven Kosten diskutiert. Mit Hilfe einer äquivalenten Formulierung dieses Problems als eine ganzzahlige konkave Minimumsaufgabe wird ein Branch-and-Bound Algorithmus entwickelt, in dem die ganzzahlige Quaderaufteilung und die klassischen Methoden des linearen kostenminimalen Flußproblems angewendet werden. Für den Fall, daß die Kostenfunktion auf einer festen Anzahl der Kanten konkav ist, wird eine Abschätzung der Laufzeit des Algorithmus angegeben. Numerische Ergebnisse zeigen die Brauchbarkeit der Methode.
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Research supported by the “Deutsche Forschungsgemeinschaft” through the project DECOMP.
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Horst, R., Thoai, N.V. An integer concave minimization approach for the minimum concave cost capacitated flow problem on networks. OR Spektrum 20, 47–53 (1998). https://doi.org/10.1007/BF01545530
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DOI: https://doi.org/10.1007/BF01545530