Main description: Nach einer knappen Zusammenfassung graphentheoretischer Definitionen folgen eine allgemeine Darstellung des Prinzips und der Komponenten von Branch-and-Bound-Verfahren sowie prinzipieller Vorgehensweisen von Heuristiken. Kapitel 2 stellt mit der Behandlung von nichtlinearen...

In this paper we propose a multi-colony Ant System, where the colonies solve a multi-objective optimization problem concerned with goods transportation.

Models are presented for the optimal location of hubs in airline networks, that take into consideration the congestion effects. Hubs, which are the most congested airports, are modeled as M/D/c queuing systems, that is, Poisson arrivals, deterministic service time, and {\em c} servers. A formula...

A firm providing transport to tourists can do so at fixed points in time (scheduling by time). Alternately, it can wait for a certain minimal number of tourists to arrive before it provides transport (scheduling by numbers). This “how to schedule” problem confronts all providers of transport...