{"title":"海洋废塑料管理系统的定性研究:一个离散时间确定性模型","authors":"Mahmood Parsamanesh , Mehmet Gümüş","doi":"10.1016/j.cnsns.2025.108617","DOIUrl":null,"url":null,"abstract":"<div><div>Ocean waste is a serious environmental problem affecting marine ecosystems and marine life. A large portion of this waste consists of recyclable materials. If managed correctly, it provides both economic and environmental benefits. By using mathematical models, it is possible to predict the spread of these wastes and develop strategies. In this paper, a discrete-time compartmental model is introduced for the cycle of processing the waste plastic management in the ocean. The model comprises three compartments plastic waste, marine debris, and recycled materials. A system of difference equations is formulated for this process according to the transmissions of materials between compartments. Then two equilibria for the model are obtained; the marine debris-free equilibrium point and the marine debris-included equilibrium point. Also, the basic reproduction number for the model is given, then its stability is investigated and stated in terms of this quantity. Furthermore, the bifurcations of the model including transcritical, period-doubling, and Neimark–Sacker bifurcation, are studied and the conditions for their occurrence are given. The obtained theoretical results are verified via several examples and simulations.</div></div>","PeriodicalId":50658,"journal":{"name":"Communications in Nonlinear Science and Numerical Simulation","volume":"143 ","pages":"Article 108617"},"PeriodicalIF":3.4000,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Qualitative study for the system of waste plastic management in the ocean: A discrete-time deterministic model\",\"authors\":\"Mahmood Parsamanesh , Mehmet Gümüş\",\"doi\":\"10.1016/j.cnsns.2025.108617\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Ocean waste is a serious environmental problem affecting marine ecosystems and marine life. A large portion of this waste consists of recyclable materials. If managed correctly, it provides both economic and environmental benefits. By using mathematical models, it is possible to predict the spread of these wastes and develop strategies. In this paper, a discrete-time compartmental model is introduced for the cycle of processing the waste plastic management in the ocean. The model comprises three compartments plastic waste, marine debris, and recycled materials. A system of difference equations is formulated for this process according to the transmissions of materials between compartments. Then two equilibria for the model are obtained; the marine debris-free equilibrium point and the marine debris-included equilibrium point. Also, the basic reproduction number for the model is given, then its stability is investigated and stated in terms of this quantity. Furthermore, the bifurcations of the model including transcritical, period-doubling, and Neimark–Sacker bifurcation, are studied and the conditions for their occurrence are given. The obtained theoretical results are verified via several examples and simulations.</div></div>\",\"PeriodicalId\":50658,\"journal\":{\"name\":\"Communications in Nonlinear Science and Numerical Simulation\",\"volume\":\"143 \",\"pages\":\"Article 108617\"},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2025-01-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Communications in Nonlinear Science and Numerical Simulation\",\"FirstCategoryId\":\"100\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1007570425000280\",\"RegionNum\":2,\"RegionCategory\":\"数学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATHEMATICS, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Communications in Nonlinear Science and Numerical Simulation","FirstCategoryId":"100","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1007570425000280","RegionNum":2,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS, APPLIED","Score":null,"Total":0}
Qualitative study for the system of waste plastic management in the ocean: A discrete-time deterministic model
Ocean waste is a serious environmental problem affecting marine ecosystems and marine life. A large portion of this waste consists of recyclable materials. If managed correctly, it provides both economic and environmental benefits. By using mathematical models, it is possible to predict the spread of these wastes and develop strategies. In this paper, a discrete-time compartmental model is introduced for the cycle of processing the waste plastic management in the ocean. The model comprises three compartments plastic waste, marine debris, and recycled materials. A system of difference equations is formulated for this process according to the transmissions of materials between compartments. Then two equilibria for the model are obtained; the marine debris-free equilibrium point and the marine debris-included equilibrium point. Also, the basic reproduction number for the model is given, then its stability is investigated and stated in terms of this quantity. Furthermore, the bifurcations of the model including transcritical, period-doubling, and Neimark–Sacker bifurcation, are studied and the conditions for their occurrence are given. The obtained theoretical results are verified via several examples and simulations.
期刊介绍:
The journal publishes original research findings on experimental observation, mathematical modeling, theoretical analysis and numerical simulation, for more accurate description, better prediction or novel application, of nonlinear phenomena in science and engineering. It offers a venue for researchers to make rapid exchange of ideas and techniques in nonlinear science and complexity.
The submission of manuscripts with cross-disciplinary approaches in nonlinear science and complexity is particularly encouraged.
Topics of interest:
Nonlinear differential or delay equations, Lie group analysis and asymptotic methods, Discontinuous systems, Fractals, Fractional calculus and dynamics, Nonlinear effects in quantum mechanics, Nonlinear stochastic processes, Experimental nonlinear science, Time-series and signal analysis, Computational methods and simulations in nonlinear science and engineering, Control of dynamical systems, Synchronization, Lyapunov analysis, High-dimensional chaos and turbulence, Chaos in Hamiltonian systems, Integrable systems and solitons, Collective behavior in many-body systems, Biological physics and networks, Nonlinear mechanical systems, Complex systems and complexity.
No length limitation for contributions is set, but only concisely written manuscripts are published. Brief papers are published on the basis of Rapid Communications. Discussions of previously published papers are welcome.