Using the adjoint state variable for parameter estimation by inverse methods with parsimony.
2020<p>Since the pioneer work of Emsellem and de Marsily (WRR, 1971), many parameter estimation methods by inverse methods in hydrogeology are based on the minimization of an objective function using descent methods, which requires the computation of the gradient of an objective function. In many cases, the number of parameters to be
Philippe Ackerer, Frédérick Delay
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Shape identification for natural convection problems using the adjoint variable method
Journal of Computational Physics, 2003zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Park, H. M., Shin, H. J.
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A Time-Domain Adjoint Variable Method for Materials With Dispersive Constitutive Parameters
IEEE Transactions on Microwave Theory and Techniques, 2012We present the first time-domain adjoint variable method (AVM) algorithm for materials with dispersive constitutive parameters. We develop our algorithm based on transmission-line modeling techniques for electromagnetic problems. The developed theory is based on utilizing the Z-domain representation of the dispersive materials, which can model ...
Osman S. Ahmed +3 more
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An adjoint variable method for time domain TLM with fixed structured grids
IEEE MTT-S International Microwave Symposium Digest, 2003, 2003We present a breakthrough algorithm for efficient estimation of objective function sensitivities for time-domain TLM with nondispersive boundaries. The original electromagnetic structure is simulated using TLM. An adjoint TLM simulation that runs backward in time is derived and solved. The sensitivities of the objective function with respect to all the
M.H. Bakr, N.K. Nikolova
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A Sequential Adjoint Variable Method in Design Sensitivity Analysis of NVH Problems
Noise Control and Acoustics, 2001Abstract A design sensitivity analysis of a sequential structural-acoustic problem is presented. A frequency response analysis is used to obtain the dynamic behavior of an automotive structure, while the boundary element method is used to solve the pressure response of an interior, acoustic domain.
N. H. Kim +6 more
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Design of electromagnetic devices using sensitivities computed with the adjoint variable method
Second International Conference on Computation in Electromagnetics, 1994The adjoint variable method allows the sensitivities with respect to all system parameters to be computed at the cost of a solution to an adjoint problem. The present paper derives expressions for the sensitivities in terms of the fields of the original and the adjoint problems. Expressions for the sources to the adjoint problem are also derived. These
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A tutorial on the adjoint method for inverse problems
Computer Methods in Applied Mechanics and Engineering, 2021Dan Givoli
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Inverse regulation of the indoor environment: An overview of the adjoint method
Energy and Buildings, 2022Xingwang Zhao, Yonggao Yin
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Design modification of two-dimensional supersonic ejector via the adjoint method
Applied Thermal Engineering, 2022Hadi Samsam-Khayani +2 more
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A discrete adjoint based level set topology optimization method for stress constraints
Computer Methods in Applied Mechanics and Engineering, 2021Sandilya Kambampati +2 more
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