Operations Research Forum
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An R Package for Generating Covariance Matrices for Maximum-Entropy Sampling from Precipitation Chemistry Data
Operations Research Forum - Tập 1 - Trang 1-21 - 2020
We present an open-source R package (MESgenCov v 0.1.0) for temporally fitting multivariate precipitation chemistry data and extracting a covariance matrix for use in the MESP (maximum-entropy sampling problem). We provide multiple functionalities for modeling and model assessment. The package is tightly coupled with NADP/NTN (National Atmospheric Deposition Program/National Trends Network) data f......
Teaching Mathematical Modelling and Programming with GAMS in Dual Management Master Curricula Using Flipped Classrooms and Open Book Exams
Operations Research Forum - - 2022
In this article, we present a flipped classroom based teaching concept and related open book exam for Master’s courses in the field of Operational Research while paying particular attention to dual curricula management students. The characteristics of dual curricula include that students study part-time complemented by practical stages in cooperating firms. As a consequence, there is a limited num......
An Optimization-Based Decision Support Tool for Incremental Train Timetabling
Operations Research Forum - Tập 4 - Trang 1-20 - 2023
We consider the typical workflow of a route planner in the context of short-term train timetabling, that is, the incremental process of adjusting a timetable for the next day or up to the next year. This process usually alternates between (1) making rough modifications to an existing timetable (e.g., shifting the departure of a train by half an hour) and then (2) making small adjustments to regain......
Duality Theorems for Convex and Quasiconvex Set Functions
Operations Research Forum - Tập 1 - Trang 1-13 - 2020
In mathematical programming, duality theorems play a central role. Especially, in convex and quasiconvex programming, Lagrange duality and surrogate duality have been studied extensively. Additionally, constraint qualifications are essential ingredients of the powerful duality theory. The best-known constraint qualifications are the interior point conditions, also known as the Slater-type constrai......
Adoption of Waste Heat Recovery Technologies: Reviewing the Relevant Barriers and Recommendations on How to Overcome Them
Operations Research Forum - Tập 3 - Trang 1-21 - 2022
The wide adoption of heat recovery technologies in industry is hampered by specific “barriers” related to both technical and non-technical issues. This paper attempts to determine these barriers and make recommendations on how to address them. First, a literature review of related material is presented. Among numerous barriers, the main ones identified are (i) lack of information, (ii) lack of tec......
Optimal Control Analysis of a Mathematical Model for Recurrent Malaria Dynamics
Operations Research Forum - - 2023
Recurrence of malaria symptoms after treatment constitutes one of the major factors affecting malaria control in the population. The transmission of malaria will persist in the population, if effective and considerable control measures are not put in place. In this study, a time-dependent deterministic mathematical model focusing on the role of preventing and controlling the transmission dynamics ......
Modeling Uncertainty Energy Price Based on Interval Optimization and Energy Management in the Electrical Grid
Operations Research Forum - Tập 5 - Trang 1-17 - 2023
Energy providers are faced with the challenge of effectively managing electrical energy systems amidst uncertainties. This study focuses on the management and dispatch of energy demand in the electricity microgrid, employing an interval optimization strategy to address electricity price uncertainties. The demand response program (DRP) incentive modeling is utilized to implement demand dispatch. To......
Literature Survey on Automatic Pipe RoutingAbstract Piping systems are common in many architectures and designing such systems is often a complex task. Design automation of piping systems is therefore a universal research subject. Nonetheless, these piping systems are often still designed by hand as a result of their complexity. Consequently, costs associated with piping design are high, especially for large... ...
Operations Research Forum -
PPE Supply Optimization Under Risks of Disruption from the COVID-19 Pandemic
Operations Research Forum - Tập 4 - Trang 1-29 - 2023
The COVID-19 pandemic has struck health service providers around the world with dire shortages, inflated prices, and volatile demand of personal protective equipment (PPE). This paper discusses supply chain resilience in the context of a Canadian provincial healthcare provider during the COVID-19 pandemic. A multi-period multi-objective mixed-integer programming model is presented for PPE supply p......
Model Development and Solver Demonstrations Using Randomized Test Problems
Operations Research Forum - Tập 4 - Trang 1-15 - 2023
Scientific-technical computing (STC) systems have integrated capabilities to support optimization model development and solution, report generation, and visualization. STC systems can be put to good use also in education since students can readily see and discuss the solution of non-trivial, practically motivated models. Based also on our related research and teaching experience, we think that suc......
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