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Your search keyword '"El Foutayeni, Youssef"' showing total 31 results
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31 results on '"El Foutayeni, Youssef"'

11. A novel approach to establishing uniqueness of solutions in linear complementarity problems.

Author

Achik, Yamna, Agmour, Imane, and El Foutayeni, Youssef

Subjects
UNIQUENESS (Mathematics), MATRICES (Mathematics), EXISTENCE theorems, MATHEMATICAL analysis, LINEAR complementarity problem
Abstract

Linear complementarity problems are fundamental in various mathematical fields, and it is widely recognized that these problems have a unique solution if and only if the matrix related to them is a P-matrix. However, determining whether a matrix is a P-matrix can be extremely challenging or even impossible, especially for large matrices. In this paper, we present a method for establishing the existence and uniqueness of the solution to linear complementarity problems without the need for P-matrix verification. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Impact of wind speed on fishing effort

Author

Agmour, Imane, Bentounsi, Mermiem, Baba, Noussaiba, El Foutayeni, Youssef, Achtaich, Naceur, and Aouiti, Chaouki

Abstract

In this work, we search to show the influence of the wind speed on the annual fishing effort, catches and profit of seiners, and show that these parameters are the most important parameters involved in seiner’s fishing activity. To achieve this objective, we consider a bioeconomic system of marine populations exploited, in the southern Atlantic zone of Morocco, by seiner fleets. In this paper, we show that our model is stable. After, we move to calculate the fishing effort and the amount of catch that allows seiners to have a maximum annual profit under the two constraints: the changes of wind speed and the sustainability of the marine populations stocks. Also we compare the obtained results with those given by National Institute of Fisheries Research.

Published
2024
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25. The Tide Effects on Bioeconomic Model of Sardina pilchardus, Engraulis encrasicolusand Xiphias gladiusin Atlantic Moroccan Zone

Author

Baba, Nossaiba, Agmour, Imane, El Foutayeni, Youssef, and Achtaich, Naceur

Abstract

The main objective of this work is the study of the effects of high tides and low tides on fishing effort, catches as well as profits in a bioeconomic model of populations of Sardina pilchardus, Engraulis encrasicolusand Xiphias gladiusin Moroccan areas. To achieve this objective, we studied the stability of the equilibrium points of our biological model then we added in our model the effect of the tides in the fishing effort which maximizes the profits of the fishermen under the constraint of the conservation of the biodiversity of these marine species using the generalized Nash equilibrium in the resolution of the bioeconomic model. As results, we were able to give the best fishing times according to the tides of each month of the whole year which will allow us to achieve better yields. Hence the importance of introducing the effect of high and low tides in bioeconomic models.

Published
2022
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