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American Journal of Operations Research (AJOR) is an international scientific journal dedicated to the publication and public discussion of high quality, original papers that contribute to the methodology of operational research and to the practice of decision making. AJOR contains the following types of papers: (1)In…
Bruno G. Rüttimann, Martin T. Stöckli
The recently experienced hype concerning the so-called “4 th Industrial Revo lution” of production systems has prompted several papers of various sub topics regarding Cyber - Ph d ysical Production Systems (CPPS). However, important aspects such as the m odel…
Sukriti Gangwar, Chandra Sen
Multi - goal and multi-objective optimizations are similar techniques to achieve multiple conflicting goals/objectives simultaneously. There are several tech niques for solving multi-goal and multi-objective optimization problems. The present study proposed t…
Taku Yanagisawa, Yoshinobu Tamura, Adarsh Anand, Shigeru Yamada
The software reliability model is the stochastic model to measure the software reliability quantitatively. A Hazard-Rate Model is the well - known one as the typical software reliability model. We propose Hazard-Rate Models Consider ing Fault Severity Levels…
Vardges Melkonian
This paper gives integer linear programming models for scheduling doubles tennis group competitions. The goal is to build a fair and competitive schedule for all players. Our basic model achieves that for each player the average ranking of his partners in all…
Qingjie Hu, Zhijuan Zhou, Yu Chen
In this paper, by using the notion of convexificator, we introduce the generalized standard Abadie constraint qualification and the generalized MPVC Abadie constraint qualification, and define the generalized stationary conditions for the nonsmooth mathematic…
Mogooe Malokane Emily, Goodwell Muyengwa
Purpose: An element of poor service delivery concerns the quality of management on the maintenance of services like water, electricity, roads, schools and clinics. This is a relevant and topical issue for research because of the current situatio n regarding t…
Yves Tinda Mangongo, Justin Dupar Busili Kampempe, Monga Kalonda Luhandjula
The last three decades ha ve witnessed development of optimization under fuzziness and randomness also called Fuzzy Stochastic Optimization. The main objective of this new field is the need for basing many human decisions on information which is both fuzzily…
Yves Tinda Mangongo, Joseph-Désiré Kyemba Bukweli, Justin Dupar Busili Kampempe
In this paper , fuzzy techniques have been used to track the problem of malaria transmission dynamics. The fuzzy equilibrium of the proposed model was discussed for different amounts of parasites in the body. We proved that when the amounts of parasites are l…
Sara Nourazari, Hillel Kumin
Sufficient conditions are given for any local minimum of a function of two integer variables to be a global minimum. An example is given to show that a function of two integer variables need not be discrete convex for this condition to hold.
Tarek Aboueldah, Hanan Farag
The goal of railway rolling stock maintenance and replacement approaches is to reduce overall cost while increasing reliability which is multi objective op timization problem and a proper predictive maintenance scheduling table sh ould be adequately designed.…
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American Journal of Operations Research (AJOR) is an international scientific journal dedicated to the publication and public discussion of high quality, original papers that contribute to the methodology of operational research and to the practice of decision making. AJOR contains the following types of papers: (1)In… All articles are open access under a CC BY 4.0 licence, with authors retaining copyright.
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