حل أنظمة المعادلات التفاضلية الاعتيادية باستخدام أمثلية سرب الجسيمات والخوارزمية الجينية بالاعتماد على تقريبات بادي

Solving Systems of Ordinary Differential Equations Using Particle Swarm Optimization and Genetic Algorithm Based on Padé Approximations
البحث في الرسائل
الباحث
رهام هيثم سالم العزاوي
المشرف
عزام صلاح الدين يونس العدول
الجامعة
جامعة الموصل
الكلية / القسم
كلية التربية للعلوم الصرفة / قسم الرياضيات
الشهادة
ماجستير
السنة
2022
لغة الرسالة
عربي
الكلمات المفتاحية
المعادلات التفاضلية ; أمثلية سرب الجسيمات ; الخوارزمية الجينية ; تقريبات بادي

Abstract

A In this work, the systems of Ordinary Differential Equations (SODEs) were transformed into constrained optimization problems to find their approximate solutions. An algorithm is proposed by applying particle swarm optimization (PSO) and the genetic algorithm (Genetic Algorithm (GA) based on the Padé expansion approximation (PEA). Since many solutions of linear and nonlinear SODEs have different formulas, Padé approximation expansion was used as it is a fractional expansion. This leads to obtain results with higher accuracy than other expansions. A quantitative criterion represented by the Fitness Function (FF)) is used for the purpose of determining the accuracy of approximate solutions by adding a Penalty Function (PF) to the Discrete Least Square Weighted Function (DLSWF)). Particle swarm optimization (PSO) and the genetic algorithm (Genetic Algorithm (GA) was applied to a set of SODEs. It was found that the results were accurate and close to the exact solution of SODEs in most of the tests. These results demonstrate the ability of the proposed algorithm to solve linear and nonlinear ODE systems with initial or boundary conditions.

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