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 21 for “"p-median"”.
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A discrete equal-capacity p-Median problem
… with the analysis of a discrete equal-capacity p-median problem, where the costs are directly proportional to the shipping distance and the amount shipped. A mixed integer programming formulation of the unbalanced, but equal capacitated case is analyzed. First we develop a dynamic programming …
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Capacitated, unbalanced p-median problems on a chain graph with a continuum of link demands
… problem is also referred to as the capacitated p-median problem on a chain graph. Two unbalanced cases of this problem are considered, namely, the over-capacitated case when total supply exceeds total demand, and the deficit capacity case when total supply is less than total demand. Both these …
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Medical Imaging Centers in Central Indiana: Optimal Location Allocation Analyses
… Location optimization models such as the P-Median model, the Maximum Covering model, and Clustering and Partitioning are often used in the field of operations research to solve location problems, but are lesser known within the discipline of Geographic Information Science. This study was …
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Robust Cross-dock Location Model Accounting for Demand Uncertainty
… models were developed. One followed the p-median facility problem type, where only p facilities were opened in order to minimize total network costs. In the second model, as many cross-docks as necessary were opened and facility location costs were considered while minimizing total network …
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Category information in real-world scenes: evaluation and reconstruction of human category spaces
… scaling (MDS) and the alignment of p-median clustering results. Among the tested features here, the fc7 layer, the last layer of CNN before the classification layer, showed the strongest typicality effect, the high correlations (r = 0.74) in the ordinal MDS distance matrix and the …
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Augmenting Indiana's Groundwater Level Monitoring Network: Optimal Siting of Additional Wells to Address Spatial and Categorical Sampling Gaps
… discrete facility location model known as the p-median problem, and solved to optimality using a mathematical programming package.
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Implementation of Directional Median Filtering using Field Programmable Gate Arrays
<p>Median filtering is a non-linear filtering technique which is effective in removing impulsive noise from data. In this thesis, directional median filtering has been implemented using cumulative histogram of samples in several directions. Different methods to implement directional median …
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An algorithmic approach to continuous location
We survey the p-median problem and the p-centre problem. Then we investigate two new techniques for continuous optimal partitioning of a tree T with n - 1 edges, where a nonnegative rational valued weight is associated with each edge. The continuous Max-Min tree partition problem (the continuous …
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Location optimization for vaccination centers of the andean region in Peru
… the Set Covering, Maximal Covering and P- Median models. Coverage, location costs and travel distance were prioritized. The sample used was the district of Kimbiri in Cusco. Of the seventy rural communities and nine health centers available, 55 and 7 were included, respectively. One …
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Network Design and Analysis Problems in Telecommunication, Location-Allocation, and Intelligent Transportation Systems
… design problem, the discrete equal-capacity p-median problem (PMED), and the estimation of dynamic origin-destination path ows or trip tables in a general network. For the LATA network problem, we develop a model and apply the Reformulation-Linearization Technique (RLT) to construct various …
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Optimization of a supply chain network for bioenergy production from food waste
… and processing network. We first develop a p-median model and determine an optimal grouping of the waste sources in multiple clusters where each cluster is served by a single preprocessing facility. This is considered as a proxy to the aggregate cost of delivering food waste to intermediate …
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Integrating Simulation–Optimisation for Multi-Objective Blood Supply Chain Network Design
… a Tabu Search algorithm applied to the p-median problem, and an Ant Colony Optimisation (ACO) algorithm designed to simultaneously optimise facility number and location. The framework is validated using a benchmark earthquake dataset and a real-world case study in Devon, UK. The results …
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Emergency Medical Services Response Optimization
… drone-delivered AEDs. Our model combines the p-median framework with an explicit M/M/d queue to determine the minimum number of drones required to meet a pre-specified response time goal (average or 90th percentile), while guaranteeing that a sufficient number of drones are located at each base. …
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Optimizing Equity in Healthcare Access: An Integer Programming Approach to Emergency Department Closures and Travel Burden Disparities in Ontario
… within this framework. The Capacitated p-Median Problem (CpMP) model identifies closures that minimize patient travel times, with results aligning to some historical closures (e.g., Durham Memorial and Chesley District), reflecting sensitivity to factors such as ED proximity and urban …
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Intensity Modulated Proton Therapy Optimization Under Uncertainty: Field Misalignment and Internal Organ Motion
… motion uncertainty. In the first stage, a $p$-median algorithm is developed for beam angle clustering. In the second stage, a bi-level search algorithm is used to find the final beam angle set for the treatment. Furthermore, Support vector machine (SVM) is used for beam angle classification to …
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Static and sequential location-allocation problems on networks and areas with probabilistic demands
… a chain graph. It is shown that except for the 1-median case, the problem is generally nonconvex. However, for the p-median case, it is shown that all local and global trd.nima to the problem may be discovered by solving a series of linear programming problems. This analysis forms the basis for …
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Balanced, capacitated, location-allocation problems on networks with a continuum of demand
… problem considered herein, is an absolute p-median problem in which p > l capacitated facilities are to be located on a chain graph having both nodal and link demands, the latter of which are defined by nonnegative, integrable demand functions. In addition, the problem is balanced, in that it …
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Developing a Stormwater Pond Filter to Capture Phosphorus and Other Pollutants
… stages, but did not separate lead from P. Median water quality parameters (pH, conductivity, temperature, turbidity, dissolved oxygen, carbon, iron) met U.S. EPA recommended limits, but some parameters violated the recommended limits at a few time points. These studies demonstrate that …
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Patterns of Nutrient Acquisition in Canvasbacks During Spring Migration
… levels was corrected where needed.</p> <p>Median collection dates occurred just prior to peak canvasback use of each staging area. Masses of ovaries, testes, oviducts, and the largest follicle diameter increased as spring migration phenology advanced. In late migration, ovary and oviduct …
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A metaheuristic and simheuristic approach for the p-HUB median problem from a telecommunication perspective
… a xarxes de telecomunicació, el problema de la p mediana no capacitat, analitzant-lo des d'escenaris deterministes i estocàstics.
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