Results 11 to 20 of about 3,216,540 (223)

Continuous energy adjoint transport for photons in PHITS [PDF]

EPJ Web of Conferences, 2017
Adjoint Monte Carlo can be an effcient algorithm for solving photon transport problems where the size of the tally is relatively small compared to the source. Such problems are typical in environmental radioactivity calculations, where natural or fallout radionuclides spread over a large area contribute to the air dose rate at a particular location ...
Malins Alex, Machida Masahiko, Niita Koji   +2 more
core   +4 more sources

A CONTINUOUS ADJOINT APPROACH FOR VEHICLE INTERIOR NOISE REDUCTION [PDF]

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), 2016
In this paper the continuous adjoint method is developed for a vibroacoustic model that predicts the interior noise of a vehicle induced by the airflow. The model simulates the front side window vibration, excited by the acoustic and hydrodynamic pressure load, and the resulting sound wave propagation into the cabin. Targeting interior noise reduction,
Kapellos, Christos, Hartmann, Michael
openaire   +2 more sources

On the Absolutely Continuous Spectrum of Self-Adjoint Extensions

Journal of Functional Analysis, 1995
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Brasche, Johannes F., Neidhardt, Hagen
openaire   +4 more sources

A Continuous Adjoint Framework For Vehicle Aerocoustic Optimization

, 2018
This paper presents a novel adjoint-based methodology for vehicle aeroacoustic optimization. The adjoint sensitivity map on the side mirror is computed, which indicates how its geometry should change in order to reduce the wind noise transmission into the vehicle interior.
Kapellos, C.,, Hartmann, M.,
openaire   +2 more sources

Continuity of the Spectrum of a Field of Self-Adjoint Operators [PDF]

Annales Henri Poincaré, 2016
Given a family of self-adjoint operators $(A_t)_{t\in T}$ indexed by a parameter $t$ in some topological space $T$, necessary and sufficient conditions are given for the spectrum $σ(A_t)$ to be Vietoris continuous with respect to $t$. Equivalently the boundaries and the gap edges are continuous in $t$. If $(T,d)$ is a complete metric space with metric $
Beckus, Siegfried, Bellissard, Jean
openaire   +3 more sources

Continuous Adjoint Method for Unstructured Grids [PDF]

AIAA Journal, 2008
Adjoint-based shape optimization methods have proven to be computationally efficient for aerodynamic problems. The majority of the studies on adjoint methods have used structured grids to discretize the computational domain. Because of the potential advantages of unstructured grids for complex configurations, in this study we have developed and ...
Antony Jameson, Sriram Shankaran, Luigi Martinelli   +2 more
openaire   +1 more source

On the adjoint of a symmetric operator [PDF]

, 2007
In general it is a non-trivial task to determine the adjoint S* of an unbounded symmetric operator S in a Hilbert or Krein space. We propose a method to specify S* explicitly which makes use of two boundary mappings that satisfy an abstract Green's ...
Meda S., Nelly Villamizar, CATALISANO, MARIA VIRGINIA, E. CARLINI, Matilde Lalín, Saito, Morihiko, Mauceri G., Fernandes de Oliveira, GM, Yuzvinsky, Sergey, Nero Budur, Vallarino, Maria, PICCIONE, P., Matthias Langer, Behrndt, Jussi, Frank Sottile (7161257), Morihiko Saito, Hynek Kovařík, PEREIRA, Antonio L., M. V. CATALISANO, Budur, Nero, Langer, Matthias, Elisa Postinghel, Stefano Meda, Lotoreichik, Vladimir, JAVALOYES, M. A., Catalisano M.V, Carlini, Enrico, Mauceri, G., Giancarlo Mauceri, Sergey Yuzvinsky, CATALISANO M. V., PEREIRA, Marcone C., Jussi Behrndt, MAUCERI, GIANCARLO, Wadim Zudilin, Veys, Willem, S. Meda, Detchat Samart, M. Vallarino, Catalisano, M.V., G. Mauceri, Frank Sottile, Elisa Postinghel (2887796), BILIOTTI, L., Meda, S., Kovarik, Hynek, Maria Vallarino, Nelly Villamizar (7161260)   +47 more
core   +1 more source

Sensitivity Analysis for Periodic Orbits and Quasiperiodic Invariant Tori Using the Adjoint Method

, 2022
This paper presents a rigorous framework for the continuation of solutions to nonlinear constraints and the simultaneous analysis of the sensitivities of test functions to constraint violations at each solution point using an adjoint-based approach.
Dankowicz, Harry, Sieber, Jan, Dankowicz, H, Sieber, J   +3 more
core   +1 more source

RANS turbulence treatment for continuous adjoint optimization [PDF]

Proceeding of THMT-15. Proceedings of the Eighth International Symposium On Turbulence Heat and Mass Transfer, 2015
This paper discusses the implementational aspects related to the turbulence modelling for continuous adjoint optimization. The starting point is the derivation of equations of the high-Reynolds number k- model of turbulence in the framework of continuous adjoint optimization.
Mirza Popovac, H. Jasak, H. Rusche, C. Reichl   +3 more
  +5 more sources

Continuous Adjoint Approach for the Spalart-Allmaras Model in Aerodynamic Optimization [PDF]

AIAA Journal, 2011
In this paper, the continuous adjoint method to compute shape sensitivities in aerodynamic design with turbulence modeling is described and developed. The focus is on compressible flows described by the Reynolds-averaged Navier-Stokes equations and the classical Spalart-Allmaras model for turbulence. Turbulence modeling usually requires, in particular,
Bueno-Orovio, A., Castro, C., Palacios, F., Zuazua, E.   +3 more
openaire   +3 more sources