Realistic Optimal Tolerant Solution of the Quadratic Interval Equation and Determining the Optimal Control Decision on the Example of Plant Fertilization

In scientific journals, it is increasingly common to find articles presenting methods for solving problems not based on idealistic mathematical models containing perfectly accurate coefficient values that cannot be obtained in practice, but on models in which coefficient values are affected by uncer...

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Main Authors: Andrzej Piegat, Marcin Pluciński
Format: Article
Language:English
Published: MDPI AG 2022-10-01
Series:Applied Sciences
Subjects:
Online Access:https://www.mdpi.com/2076-3417/12/21/10725
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author Andrzej Piegat
Marcin Pluciński
author_facet Andrzej Piegat
Marcin Pluciński
author_sort Andrzej Piegat
collection DOAJ
description In scientific journals, it is increasingly common to find articles presenting methods for solving problems not based on idealistic mathematical models containing perfectly accurate coefficient values that cannot be obtained in practice, but on models in which coefficient values are affected by uncertainty and are expressed in the form of intervals, fuzzy numbers, etc. However, solving tasks with interval coefficients is not fully mastered, and a number of such problems cannot be solved by currently known methods. There is undeniably a research gap here. The article presents a method for solving problems governed by the quadratic interval equation and shows how to find the tolerant optimal control value of such a system. This makes it possible to solve problems that could not be solved before. The paper introduces a new concept of the degree of robustness of the control to the set of all possible multidimensional states of the system resulting from its uncertainties. The method presented in the article was applied to an example of determining the optimal value of nitrogen fertilization of a sugar beet plantation, the vegetation of which is under uncertainty. It would be unrealistic to assume precise knowledge of crop characteristics here. The proposed method allows to determine the value of fertilization, which gives a chance to obtain the desired yield for the maximum number of field conditions that can occur during the growing season.
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spelling doaj.art-20cc2f1e0fba4e86ac2b6f2512d131262023-11-24T03:31:50ZengMDPI AGApplied Sciences2076-34172022-10-0112211072510.3390/app122110725Realistic Optimal Tolerant Solution of the Quadratic Interval Equation and Determining the Optimal Control Decision on the Example of Plant FertilizationAndrzej Piegat0Marcin Pluciński1Faculty of Computer Science and Information Systems, West Pomeranian University of Technology, Żołnierska 49, 71-210 Szczecin, PolandFaculty of Computer Science and Information Systems, West Pomeranian University of Technology, Żołnierska 49, 71-210 Szczecin, PolandIn scientific journals, it is increasingly common to find articles presenting methods for solving problems not based on idealistic mathematical models containing perfectly accurate coefficient values that cannot be obtained in practice, but on models in which coefficient values are affected by uncertainty and are expressed in the form of intervals, fuzzy numbers, etc. However, solving tasks with interval coefficients is not fully mastered, and a number of such problems cannot be solved by currently known methods. There is undeniably a research gap here. The article presents a method for solving problems governed by the quadratic interval equation and shows how to find the tolerant optimal control value of such a system. This makes it possible to solve problems that could not be solved before. The paper introduces a new concept of the degree of robustness of the control to the set of all possible multidimensional states of the system resulting from its uncertainties. The method presented in the article was applied to an example of determining the optimal value of nitrogen fertilization of a sugar beet plantation, the vegetation of which is under uncertainty. It would be unrealistic to assume precise knowledge of crop characteristics here. The proposed method allows to determine the value of fertilization, which gives a chance to obtain the desired yield for the maximum number of field conditions that can occur during the growing season.https://www.mdpi.com/2076-3417/12/21/10725interval arithmeticinterval equationsmultidimensional interval arithmeticrobustness to uncertaintyplant fertilization modeling
spellingShingle Andrzej Piegat
Marcin Pluciński
Realistic Optimal Tolerant Solution of the Quadratic Interval Equation and Determining the Optimal Control Decision on the Example of Plant Fertilization
Applied Sciences
interval arithmetic
interval equations
multidimensional interval arithmetic
robustness to uncertainty
plant fertilization modeling
title Realistic Optimal Tolerant Solution of the Quadratic Interval Equation and Determining the Optimal Control Decision on the Example of Plant Fertilization
title_full Realistic Optimal Tolerant Solution of the Quadratic Interval Equation and Determining the Optimal Control Decision on the Example of Plant Fertilization
title_fullStr Realistic Optimal Tolerant Solution of the Quadratic Interval Equation and Determining the Optimal Control Decision on the Example of Plant Fertilization
title_full_unstemmed Realistic Optimal Tolerant Solution of the Quadratic Interval Equation and Determining the Optimal Control Decision on the Example of Plant Fertilization
title_short Realistic Optimal Tolerant Solution of the Quadratic Interval Equation and Determining the Optimal Control Decision on the Example of Plant Fertilization
title_sort realistic optimal tolerant solution of the quadratic interval equation and determining the optimal control decision on the example of plant fertilization
topic interval arithmetic
interval equations
multidimensional interval arithmetic
robustness to uncertainty
plant fertilization modeling
url https://www.mdpi.com/2076-3417/12/21/10725
work_keys_str_mv AT andrzejpiegat realisticoptimaltolerantsolutionofthequadraticintervalequationanddeterminingtheoptimalcontroldecisionontheexampleofplantfertilization
AT marcinplucinski realisticoptimaltolerantsolutionofthequadraticintervalequationanddeterminingtheoptimalcontroldecisionontheexampleofplantfertilization