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.
Results
Showing 1 to 17 of 17 for “"Network flow model"”.
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Network flow model of short-run domestic phosphate supply, A
Includes bibliographical references.
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A model for cash management : an aquaculture case study
… seasonal and uncertainty factors involved. The network flow model with gains and losses for use in cash management was first presented in 1979 by Golden and Libertore. Their model is deterministic, but in this thesis, stochastic techniques are implemented to the model, as well as introducing …
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Geo-demographic analysis in support of the United States Army Reserve (USAR) unit positioning and quality assessment model (UPQUAM)
… USAR zip code data. LTC Fair also formulated a network flow model and began an initial implementation of the first of many constraints. My thesis will validate the constraint models and develop the set of constraints that another project, by LTC Brau, will need to develop the network flow model. …
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Evolving efficient airline schedules
… particular day. This thesis shows how to use the network flow model of a flight schedule in order to find the smallest fleet required to fly a schedule without dropping any flights. This is done by pruning the whole network to a smaller set of more relevant arcs. It is also the goal of the project …
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Pooling and segmentation to improve primary care prescription management
… with time studies to develop a quantitative network flow model of the prescription management process, including metrics for the yield of prescription requests, excess requests for chronic & stable medications, and prescriptions that overflow from scheduled appointments. The model is used to …
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Contingency munitions logistics planning and control : a framework for analysis
… of CONUS transshipment operations and network infrastructure is given, along with a review of automated information systems being developed to provide real-time total asset visibility. Little work has been done to automate plan generation for decision support in this area. A …
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Modeling of material recovery facility performance with applications for life cycle assessment
… of recycling systems. In this thesis, we apply a network flow model to evaluate the performance of sorting facility scenarios. We use experimental sorting efficiencies obtained through waste sampling at a functioning MRF, and explore how those efficiencies change under different operating …
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Modeling and design of material recovery facilities : genetic algorithm approach
… valuable components. In this work, we define a network flow model to represent a MRF that sorts wastes using multi-output units with recirculating streams. For each material in the system, we define a matrix to describe the sorting process. We then formulate a genetic algorithm (GA) that …
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Modeling hydrogen fuel distribution infrastructure
… of hydrogen fuel, a hybrid product pathway and network flow model is created and solved. In the literature review, an extensive analysis is performed of the forthcoming findings of the National Academy of Engineering Board on Energy and Environmental Systems (BEES). Additional considerations …
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Applying tree knapsack approaches to general network design : a case study
… decision problems that fall into the category of network flow problems: numerous examples of applications can be found in areas such as telecommunications, logistics, distributions, engineering, computer science and so on. One of the most popular and valuable tools to solve network flow problems …
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A Comprehensive Methodology For Well Ramp-up of Open Hole Stand-Alone Screen Completions
… of “pinholes” resulting in concentrated inflow around the wellbore. A combination of laboratory return permeability tests, CT scans and a developed reduced order model determines the pinhole size and filter cake properties to calculate the total pinhole flow area or concentrated inflow …
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Banana transshipment model
… America to various markets using a transshipment model. The goal of the transshipment model estimates the supply chain that creates the lowest cost. Through analysis of fuel, trucking, and shipping markets, the model makes the optimal decision regarding transportation routing. The model is limited …
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Optimization and measurement in humanitarian operations: addressing practical needs
… (ii) bottleneck management for transportation networks, and (iii) performance measurement of the food assistance supply chain. The assignment and reassignment of personnel to jobs is a large-scale problem faced by many organizations including the military and multi-national organizations. …
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Space logistics network optimization with embedded propulsion technology selection
… the architectural aspects of the in-space network. On the other hand, determination of network architecture and mission sequence often relies on the expertise of mission designers. Thus, formulating and optimizing the problem as a multi-mission campaign can guide top-level decisions through …
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Generalized multi-commodity network flows : case studies in space logistics and complex infrastructure systems
… with the arbitrarily predetermined logistics network. But how do we select an optimal logistics network? Especially if we can utilize in-situ resources on the Moon and Mars, it will add complexity to network selection problem. The objective of this thesis is to develop a comprehensive …
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Assessing Programmatic Variables and Uncertainties in Space Exploration Campaign Planning
… of mission types. Exploration missions can be modeled using network flow formulations, in which mixed-integer linear programming is used to find the most efficient flow of commodities through a network given a set of supplies, demands, and vehicles. However, in the early stages of program …
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Algorithmic studies on PCB routing
… PCBs has been studied extensively in the past. Network flow is pervasively used to model this problem. However, previous studies are incomplete in two senses. First, none of the previous works correctly model the diagonal capacity, which is essential for 45 degree routing in most packages and …