Results 1 to 10 of about 5,276,757 (246)

Modifications of Flower Pollination, Teacher-Learner and Firefly Algorithms for Solving Multiextremal Optimization Problems

open access: yesAlgorithms, 2022
The article offers a possible treatment for the numerical research of tasks which require searching for an absolute optimum. This approach is established by employing both globalized nature-inspired methods as well as local descent methods for ...
Pavel Sorokovikov, Alexander Gornov
doaj   +1 more source

Integrability Properties of the Slepyan–Palmov Model Arising in the Slepyan–Palmov Medium

open access: yesMathematics, 2023
This study investigates the Slepyan–Palmov (SP) model, which describes plane longitudinal waves propagating within a medium comprising a carrier medium and nonlinear oscillators.
Muhammad Usman   +4 more
doaj   +1 more source

Robustness Assessments of Urban Rail Transit Networks Based on Network Utilization

open access: yesIEEE Access, 2021
Urban rail transit has become an important traffic mode in large cities and has brought great conveniences to urban residents, however traffic accidents often occur in daily operations, therefore the safety and robustness must be paid more attention.
Wenchao Shao   +3 more
doaj   +1 more source

Lie symmetry analysis, optimal system, and new exact solutions of a (3 + 1) dimensional nonlinear evolution equation

open access: yesNonlinear Engineering, 2021
Studies on Non-linear evolutionary equations have become more critical as time evolves. Such equations are not far-fetched in fluid mechanics, plasma physics, optical fibers, and other scientific applications.
Tiwari Ashish, Sharma Kajal, Arora Rajan
doaj   +1 more source

A New Technique to Achieve Torsional Anchor of Fractional Torsion Equation Using Conservation Laws

open access: yesFractal and Fractional, 2023
The main idea in this research is introducing another approximate method to calculate solutions of the fractional Torsion equation, which is one of the applied equations in civil engineering. Since the fractional order is closed to an integer, we convert
Nematollah Kadkhoda   +3 more
doaj   +1 more source

Classification of Lie Subalgebras up to an Inner Automorphism [PDF]

open access: yesJournal of Algebraic Systems, 2014
In this paper, a useful classification of all Lie subalgebras of a given Lie algebraup to an inner automorphism is presented. This method can be regarded as animportant connection between differential geometry and algebra and has many applications in ...
Seyed Reza Hejazi
doaj   +1 more source

Exact Solutions for the KMM System in (2+1)-Dimensions and Its Fractional Form with Beta-Derivative

open access: yesFractal and Fractional, 2022
Fractional calculus is useful in studying physical phenomena with memory effects. In this paper, the fractional KMM (FKMM) system with beta-derivative in (2+1)-dimensions was studied for the first time.
Lihua Zhang   +4 more
doaj   +1 more source

Lie symmetry analysis for generalized short pulse equation

open access: yesOpen Physics, 2022
Lie symmetry analysis (LSA) is one of the most common, effective, and estimation-free methods to find the symmetries and solutions of the differential equations (DEs) by following an algorithm.
Zhao Weidong   +4 more
doaj   +1 more source

Micro Nuclear Reactors: Potential Replacements for Diesel Gensets within Micro Energy Grids

open access: yesEnergies, 2020
Resilient operation of medium/large scale off-grid energy systems, which is a key challenge for energy crisis solutions, requires continuous and sustainable energy resources. Conventionally, micro energy grids (MEGs) are adopted to supply electricity and
Hossam A. Gabbar   +2 more
doaj   +1 more source

Classification of methods for risk measures VaR and CVaR calculation and estimation

open access: yesSistemnì Doslìdženâ ta Informacìjnì Tehnologìï, 2016
A systematic classification of the existing approaches for popular risk measures VaR and CVaR calculating and estimating is fulfilled. A review of the most used methods is done.
Nataliia G. Zrazhevska, A. G. Zrazhevsky
doaj   +1 more source

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