Results 1 to 10 of about 11,092,921 (297)
The Lagrange Multiplier Method for Dirichlet's Problem [PDF]
Mathematics of Computation, 1981 The Lagrange multiplier method of Babuška for the approximate solution of Dirichlet’s problem for second order elliptic equations is reformulated. Based on this formulation, new estimates for the error in the solution and the boundary flux are given. Efficient methods for the solution of the approximate problem are discussed.
James H. Bramble
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Variational iteration method with matrix Lagrange multiplier for nonlinear oscillators
Journal of Low Frequency Noise, Vibration and Active Control, 2019 The variational iteration method is a famous mathematical tool to nonlinear oscillator, this paper shows that the method can be further improved by using matrix Lagrange multipliers.
Zhao-Ling Tao, Guo-Hua Chen, Yi-Han Chen
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Reconstructing a Helical Magnetic Field in the Solar Corona using Lagrange Multiplier Technique [PDF]
Iranian Journal of Astronomy and Astrophysics, 2023 We aim to reconstruct a nonlinear force-free magnetic field by minimizing the global departure of an initial field from a force-free and solenoidal state in the presence of helicity to obtain an appropriate representation of the magnetic field compatible
Nasim IldarTanha, Sadollah Nasiri
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Controllability, not chaos, key criterion for ocean state estimation [PDF]
Nonlinear Processes in Geophysics, 2017 The Lagrange multiplier method for combining observations and models (i.e., the adjoint method or 4D-VAR) has been avoided or approximated when the numerical model is highly nonlinear or chaotic.
G. Gebbie +3 more
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The Influence of the Basic Parameters of the Numerical Model on the Contact Pressure in Dynamic Tasks [PDF]
Transactions of the VŠB-Technical University of Ostrava, Mechanical Series, 2013 The paper is devoted to quasi-static and low-velocity impact simulation using finite element modelling. The paper describes the effects of contact models, contact parameters, integration method, and the velocity of impact on contact stresses values ...
Irina SEMENOVA, Petr HORYL
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Energies, 2022 In medium-term scheduling, the end-of-term storage energy maximization model is proposed to create conditions for the safety, stability and economic operation of the hydropower system after control term, which satisfies the system load demand undertaken ...
Xinyu Wu, Ruixiang Cheng, Chuntian Cheng
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Augmented Lagrangian method for imposing nonlinear multi freedom constraints in static analysis for frames using FEM [PDF]
E3S Web of Conferences, 2021 This paper focuses on the treatment of nonlinear multi freedom constraints using an augmented Lagrangian method in finite element analysis of frames. The process of imposing boundary constraints is developed by changing the assembly stiffness equation to
Bich Quyen Vu Thi +3 more
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A Lagrange Multiplier Expression Method for Bilevel Polynomial Optimization [PDF]
SIAM Journal on Optimization, 2021 This paper studies bilevel polynomial optimization problems. To solve them, we give a method based on polynomial optimization relaxations. Each relaxation is obtained from the Kurash-Kuhn-Tucker (KKT) conditions for the lower level optimization and the exchange technique for semi-infinite programming.
Jiawang Nie +3 more
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Journal of Asian Architecture and Building Engineering, 2023 shaped steel sections subjected to biaxial loads. The Lagrange multiplier method is used to optimize cost index (CIc), and CO2 emission of the columns.
Won-Kee Hong +3 more
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Comparison of Lagrange multipliers for telegraph equations
Ain Shams Engineering Journal, 2018 In this paper, we likewise calculate exact langrage multiplier and it progressively connects to the definite results of telegraph equations. This study witnesses the advantages of Exact Lagrange multipliers and their coupling with Variational Iteration ...
Muhammad Hamid +3 more
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