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 44 for “"Fleet size"”.
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Optimization of Automated Guided Vehicles (AGV) Fleet Size With Incorporation of Battery Management
… simulations have been applied to determine the fleet size. Most of these models and simulations do not incorporate the battery usage of the vehicles and the effect it can have on the throughput and the number of AGVs required for the system. The goal of this research is to develop a simulation …
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Choosing Networks for Ride-Hailing Platforms
… of two parameters: the detour factor and the fleet size. Second, we develop several approaches for selecting the networks. Third, we evaluate these approaches on empirical data. We find empirical support for the importance of the detour factor and the fleet size.
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A Comprehensive Mixed-Integer Programming Model to Optimize the Performance of Freeway Service Patrol Programs
… management must consider the beat configuration, fleet size, and fleet allocation. The beat configuration is how the network is divided into different parts for patrolling, and each part is called a beat. The beat configuration, fleet size, and fleet allocation need to be determined for designing …
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Data driven approaches to improve operational efficiency of emergency medical services
… 2 percentage points with the current ambulance fleet size, 5 percentage points by doubling the fleet size and 6 percentage points by tripling the fleet size. Next, we present a risk-based optimization approach to make the EMS network robust to unexpected changes in demand patterns. This is …
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Design of automated guided vehicle systems using Petri net models
… are limited to the computations of the fleet size and the design of the guide path layout. Another major design factor which affects the performance of an AGV system is the locations and the dimensions of the control zones. The control zones facilitate congestion free flow of AGVs along …
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Empty container logistics optimization : an implementation framework and methods
… the supply needs, the problem of optimizing the fleet size was then addressed by using an inventory model to establish the optimal safety stock level. Simulations were used to understand the sensitivity of safety stock to desired service level. The final stage involves using mathematical …
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Tracking and fleet optimization of Reusable Transport Items in the shipping industry
… system for an optimal management of the fleet, embracing technology, processes and monitoring system. The ability to track these assets is the first step to visibility and fleet optimization and we will question the opportunity for a company to invest in a real time tracking technology. …
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Optimization of vehicle routing and scheduling with travel time variability - application in winter road maintenance
… to resource constraints (e.g., truck capacity, fleet size) and operational constraints (e.g., service time windows, service time limit). The nature of the problem is to design vehicle routes and schedules to perform the required service on predetermined road segments, which can be interpreted as …
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Multi-agent Spatiotemporal Simulation of Autonomous Vehicle Fleet Operation
Autonomous vehicle fleets, consisting of self-driving vehicles, are at the forefront of transportation innovation. The appearance of autonomous vehicles (AVs) provides a new solution for traffic problems and a new market for transportation network companies such as DiDi and Uber. Conducting …
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Avaliação de políticas de suprimento de óleo diesel a unidades marítimas de exploração e produção de petróleo
… the best performance, as well as the optimal fleet size for each one. Discrete event simulation will be used to conduce this study.
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Running time variability and resource allocation : a data-driven analysis of high-frequency bus operations
… evaluate hypothetical modifications to a route's fleet size using automatically collected data. A simple model based on this framework is built to demonstrate its use. Running times are modeled at the segment level, capturing correlation between adjacent segments. Explicit modeling of ridership, …
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Resilient acquisition : unlocking high-velocity learning with model-based engineering to deliver capability to the fleet faster
… nation's security needs call for a growing naval fleet, the public-private industrial base for construction and weapon system acquisition will be stressed to perform at a high level of operational excellence. While reaching the required fleet size is a major challenge, ships are the delivery …
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How system configuration shapes demand: agent-based simulation of mobility-on-demand systems
… the need to carefully balance service area and fleet size. In the specific project context, the findings indicate that expanding the fleet requires a corresponding enlargement of the service area to maintain efficiency. These insights directly informed the decision-making process in the project. …
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Simulation Modeling of Calgary's E-Scooter System
… management policies and infrastructure, such as fleet size, battery re-charging strategies, and urban parking infrastructure locations, on the efficacy of the shared e-scooter system. The results of these simulation experiments detail the impacts of these policies on satisfied user demand, costs …
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On-demand high-capacity ride-sharing via dynamic trip-vehicle assignment with rebalancing
… We experimentally assess the trade off between fleet size, capacity, waiting time, travel delay, and amount of predictions for low to medium capacity vehicles. We validated the algorithm with over three million taxi rides from the New York City taxi dataset and demonstrate that our approach can …
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Additively Manufactured Open-Source Quadruped Robots for Multi-Robot SLAM Applications
… applications, as costs can rise exponentially as fleet size increases. SLAM is a critical feature for enabling a robot to perceive and localize itself within its environment, supporting applications such as cave exploration, disaster assistance, and remote inspection. To enhance efficiency, a …
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THE INVENTORY ROUTING PROBLEM WITH THIRD PARTY LOGISTICS
… may not satisfy all demands due to its small fleet size, which is not able to cover all deliveries in the right timeframe. One method for preventing missed orders is sending orders to some retailers in advance to hold for future use. This allows the fleet to be free to service the rest of the …
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Validation of the use of low enriched uranium as a replacement for highly enriched uranium in US submarine reactors
… would necessitate a 3.25% increase in submarine fleet size, which is small compared to the average Department of Defense project cost overrun.
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Designing a biodiesel supply chain in Mexico City
… to start a biodiesel enterprise due to its sizeable availability of waste vegetable oil (WVO) and biodiesel users. WVO is an extremely viable feedstock for producing biodiesel because of the similar functional properties compared to other feedstocks and low cost; collecting it for local …
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Optimizing integrated service for a transit route with heterogeneous demand
… constraints, such as capacity, operable fleet size and frequency conservation, are considered. The research problem is presented in three scenarios, consisting of various service patterns (e.g., all-stop, short-turn and express) under heterogeneous demand. A logit-based model was used to …
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