Pannek, Jürgen
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Pannek, Jürgen
Official Name
Pannek, Jürgen
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Pannek, J.
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GND
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Item-typ:Veröffentlichung, Robust Capacitated Vehicle Routing Problem with Uncertain Demands(2019-07-10); ; ; This thesis addresses the Static and Stochastic Capacitated Vehicle Routing Problem with Stochastic Demands (SSCVRPSD). In this problem, an initial a priori route plan is designed. During plan execution, corrective actions are applied as each demand is revealed, if the real total demand of a route exceeds the vehicle capacity. The goal is to calculate a robust a-priori route plan that will only undergo small changes when the true demands are revealed during its implementation. For that, we propose a mathematical formulation based on a Mean Absolute Deviation (MAD) objective function. This objective function combines two conflicting objectives, minimization of the expected planned transportation cost (optimality) and minimization of the mean absolute deviation of the second-stage transportation cost (robustness). In the MAD model, the variability term is multiplied by a parameter of decision-maker's choice A , used to obtain a spectrum of route plans that can be more or less robust. In this manner, the proposed formulation delivers flexibility to the decision-maker to define desired safety levels and allows to trade off cost minimization and protection.Dissertation1090 491 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Vehicular Ad hoc Network: Flooding and Routing Protocols for Safety & Management ApplicationsVehicular Adhoc Network (VANET) is one of the key technologies in an Intelligent Transportation System (ITS) to address issues regarding traffic management and road safety, traffic control and re-routing. Due to an increase in the number of vehicles, high bandwidth requirements for applications, and highly dynamic topology, VANET requires special attention for data dissemination procedures known as flooding and routing for reliable in-time data delivery. This study proposes a hybrid flooding mechanism to provide an efficient and reliable data delivery. In this dissertation, an adaptive protocol is proposed by combining the functionality of topology and position-based routing. Since route maintaining and recovery mechanisms add delays to the routing procedure, this study considers the reorientation of routing at the lower layer. The proposed routing protocols are implemented in the Veins framework and provides efficiency in term of in-time data delivery.Dissertation769 1451