Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 34 for “"VRP"”.
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A computational study of flexible routing strategies for the VRP with stochastic demands
We develop and numerically test a new strategy for the vehicle routing problem with stochastic customer demands. In our proposed approach, drivers are assigned to predetermined delivery routes in which adjacent routes share some customers. This overlapping assignment structure, which is inspired by …
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Influence of Customer Locations on Heuristics and Solutions for the Vehicle Routing Problem
The vehicle routing problem (VRP) determines preferred vehicle routes to visit multiple customer locations from a depot location based on a defined objective function. The VRP is an NP-hard network optimization problem that is challenging to solve to optimality. Over the past 60 years, multitudes …
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Modeling and Solving Variants of the Vehicle Routing Problem: Algorithms, Test Problems, and Computational Results
… of the capacitated vehicle routing problem (VRP), a sequence of deliveries is generated for each vehicle in a homogeneous fleet based at a single depot so that all customers are serviced and the total distance traveled by the fleet is minimized. Each vehicle has a fixed capacity and must …
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Behavioral Logistics and Fatigue Management in Vehicle Routing and Scheduling Problems
The vehicle routing problem (VRP), is a classic optimization problem that aims to determine the optimal set of routes for a fleet of vehicles to meet the demands of a set of customers. The VRP has been studied for many decades and as such, there are many variants and extensions to the original …
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Developing vehicle routing and outbound fulfillment systems for an E-grocery company
… fulfillment costs. The Vehicle Routing Problem (VRP), a well-known NP-hard combinatorial optimization problem, is examined in the context of e-grocery and its impact on last-mile delivery costs. The paper emphasizes an integration of scalable vehicle routing systems with efficient order …
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Vehicle routing on real road networks
The vehicle routing problem (VRP) has received particular attention, in the field of transportation and logistics. Producing good solutions for the problem is of interest both commercially and theoretically. Reliable solutions to real life applications require an approach based on realistic …
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Optimal planning with temporal logic specifications
… a novel variant of the Vehicle Routing Problem (VRP), in which temporal logics and process algebra are utilized to represent a large class of mission specifications in a systematic way. The thesis is structured in two parts. In the first part, two temporal logics that are remarkably close to the …
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Three essays on sequencing and routing problems
… First, we analyze the Vehicle Routing Problem (VRP) with and without split deliveries. In this problem, we have to route vehicles from the depot to deliver the demand to the customers while minimizing the total traveling cost. We present a lower bound for this problem, improving a previous bound …
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Routing and Control of Unmanned Aerial Vehicles for Performing Contact-Based Tasks
… are explored, the vehicle routing problem (VRP) and model reference adaptive control (MRAC) for unknown nonlinear systems. The VRP and its extension, the split delivery VRP (SVRP), are analyzed to determine the effects of using two different objective functions, the total cost objective, and …
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Belleza y calidad percibida en ruteo de vehículos
… visual en el Problema de Ruteo de Vehículos (VRP), y se identificaron las distintas medidas utilizadas. Con la información recopilada se realizó una clasificación de las distintas formas de evaluar atractivo visual, y un estudio de su relación con las medidas tradicionales de optimalidad del …
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Mathematical Programming and Heuristic Approaches for Three Novel Vehicle Routing Problems
Vehicle routing problems (VRPs) arise in key real-world domains including mail delivery, police patrol, and snow plowing. Due to the inherent complexity of the VRP, no algorithm currently exists that can solve the VRP exactly in polynomial time. In the meantime, high quality solutions are needed to …
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Understanding the shift from permanent employment to contract work among retail workers who accepted voluntary retrenchment packages in 2017
… the effect of the cost saving strategies such as VRPs, and labour brokers in the workplace. This research explores the experience of retail workers who took voluntary retrenchment package (VRP) in 2017 and then returned to the same workplace as contract workers through labour brokers. This study …
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Logística verde en Fontibón: estrategia de rutas sostenibles para Servientrega
… un modelo Green Vehicle Routing Problem (Green VRP), la investigación surge ante los altos niveles de congestión, costos operativos y emisiones contaminantes asociados al transporte urbano de mercancías en una de las zonas logísticas más importantes de la ciudad, la propuesta integra criterios …
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Optimizing Pollution Routing Problem
… is created using the Vehicle Routing Problem (VRP) which is further extended to the Pollution Routing Problem (PRP). The basic model is updated using a Monte Carlo Algorithm (MCA). The data set contains 180 data files with a combination of 10, 15, 20, 25, 50, 75, 100, 150, and 200 groups of …
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Creating a three dimensional holographic movie
… holographic movie. Holograms were written on VRP-M emulsion film with the green line of an Argon-Ion laser. The type of hologram write setup favored was a reflection hologram, due to its artistic capabilities. The illusion of a floating image is much better produced by reflection holograms as …
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Architecture for planning and execution of missions with fleets of unmanned vehicles
… de problemas de enrutamiento de vehículos (VRP, por sus siglas en inglés) [18], en dominios que implican múltiples vehículos no tripulados de capacidades heterogéneas que deben cooperar para alcanzar una serie de objetivos específicos. La planificación con redes jerárquicas de tareas …
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Collection-and-Delivery-Points: A Variation on a Location-Routing Problem
… embedded modified vehicle routing problem (VRP) algorithms, the Clark-Wright and the Sweep, modified to handle the additional restrictions caused by the CDPs. The first is an improvement heuristic, in which each closed CDP is tested as a replacement for each open CDP, and the move that …
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A profit maximization model in a two-echelon supply chain management : distribution and pricing strategies
… approaches to the vehicle routing problem (VRP) are usually used to design optimal delivery routes to serve geographically dispersed customers, who are price elastic. There is a rich literature discussing either the manufacturer's distribution strategy or its pricing initiatives. The purpose …
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Modeling, Analysis, and Exact Algorithms for Some Biomass Logistics Supply Chain Design and Routing Problems
… cost in the classical vehicle routing problem (VRP).
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