Results 181 to 190 of about 3,216 (210)
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Continuous adjoint method for Air Traffic Flow Management
Proceedings of the 45th IEEE Conference on Decision and Control, 2006This article develops a model of Air Traffic Flow using an Eulerian description with hyperbolic partial differential equations. Existence and uniqueness (well-posedness) of a solution to the system of partial differential equations on a network is established. Subsequently, an optimal control problem is studied with the junction coefficients as control
Issam S. Strub, Alexandre M. Bayen
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Adjoint Analysis of Mixed Continuous/Discrete Systems in Simulink
AIAA Modeling and Simulation Technologies Conference, 2010The adjoint simulation method is a well established and efficient tool for gaining insight and understanding of key parameters affecting the behaviour and performance of a guided missile homing system. Traditionally, the method has been employed by various missile companies during the preliminary and conceptual stages of new missile programs.
Bucco, D., Weiss, M.
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Continuous energy adjoint Monte Carlo
Progress in Nuclear Energy, 1990Abstract In some applications looking in the adjoint mode is heavily favoured over the forward calculation. Shielding work in which a large source is directing particles at a small target is one such application for example. The paper addresses the problem of forming the transpose of the secondary energy laws including the treatment of S ( α , β ...
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Continuous Adjoint Approach for Adaptive Mesh Refinement
20th AIAA Computational Fluid Dynamics Conference, 2011At present, all output-based mesh adaptation methods in the existing literature have adopted the discrete adjoint approach which, depending on the structure of the code, could be very complex to implement. In this work, we aim to investigate the continuous adjoint approach for adaptive mesh refinement, with an application to the compressible Euler ...
Yi Li, Antony Jameson, Yves Allaneau
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Unsteady Continuous Adjoint Approach for Aerodynamic Design on Dynamic Meshes
AIAA Journal, 2014This paper presents the development and application of a new unsteady continuous adjoint formulation for optimal shape design of aerodynamic surfaces in motion, such as rotating or pitching applications. The arbitrary Lagrangian–Eulerian form of the unsteady, compressible Reynolds-averaged Navier–Stokes equations with a generic source term is ...
Thomas D. Economon +2 more
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The Time-Domain Continuous Adjoint Method
2010The adjoint method is a mathematical tool that allows us to compute the gradient of an objective functional with respect to the model parameters very efficiently. In this chapter we derive a general formulation of the adjoint method that is independent of a particular physical problem.
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The Continuous Adjoint Approach in Aerodynamic Shape Optimization
2006Detailed numerical shape optimization will play a strategic role for future aircraft design. It offers the possibility of designing or improving aircraft components with respect to a pre-specified figure of merit subject to geometrical and physical constraints. However, the extremely high computational expense of straightforward methodologies currently
Gauger, N., Brezillon, J.
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Multi-adjoint Logic Programming with Continous Semantics
2001Considering different implication operators, such as "Łukasiewicz, Godel or product implication in the same logic program, naturally leads to the allowance of several adjoint pairs in the lattice of truthvalues. In this paper we apply this idea to introduce multi-adjoint logic programs as an extension of monotonic logic programs.
Jesús Medina 0001 +2 more
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Unsteady continuous adjoint to URANS coupled with FW-H analogy for aeroacoustic shape optimization
Computers and Fluids, 2021+2 more
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