نتایج جستجو برای: شاخص adi

تعداد نتایج: 76526  

2016
Jorge Baier Adi Botea Bas van Opheusden Zahy Bnaya Gianni Galbiati Wei Ji Ma Scott Kiesel

s of Papers Presented at SoCS 2016 in the Previously Published Paper Track Jorge Baier and Adi Botea Editors

Journal: :Astronomy and Astrophysics 2022

Reference-star differential imaging (RDI) is a promising technique in high-contrast that thought to be more sensitive exoplanets and disks than angular (ADI) at short separations (i.e., <0.3"). However, it unknown whether the performance of RDI on ground-based instruments can improved by using all archival data optimize subtraction stellar contributions. We characterize SPHERE/IRDIS direct disk...

Journal: :J. Computational Applied Mathematics 2017
Bertram Düring James Miles

We propose a new high-order alternating direction implicit (ADI) finite difference scheme for the solution of initial-boundary value problems of convection-diffusion type with mixed derivatives and non-constant coefficients, as they arise from stochastic volatility models in option pricing. Our approach combines different high-order spatial discretisations with Hundsdorfer and Verwer’s ADI time...

2010
R. Mirzavand A. Abdipour G. Moradi

This paper describes the alternating-direction implicit finite-difference time-domain (ADI-FDTD) method for physical modeling of high-frequency semiconductor devices. The model contains the semiconductor equations in conjunction with the Maxwell’s equations which describe the complete behavior of highfrequency active devices. Using ADI approach leads to a significant reduction of the full-wave ...

2003
T. P. Witelski

Alternating Direction Implicit (ADI) schemes are constructed for the solution of two-dimensional higher-order linear and nonlinear diffusion equations, particularly including the fourth-order thin film equation for surface tension driven fluid flows. First and second-order accurate schemes are derived via approximate factorization of the evolution equations. This approach is combined with itera...

Journal: :CoRR 2012
Garret M. Flagg Serkan Gugercin

The ADI iteration is closely related to the rational Krylov projection methods for constructing low rank approximations to the solution of Sylvester equation. In this paper we show that the ADI and rational Krylov approximations are in fact equivalent when a special choice of shifts are employed in both methods. We will call these shifts pseudo H2-optimal shifts. These shifts are also optimal i...

2009
Author Wong Ngai Wong Venkataramanan Balakrishnan

Balanced truncation (BT), as applied to date in model order reduction (MOR), is known for its superior accuracy and computable error bounds. Positive-real BT (PRBT) is a particular BT procedure that preserves passivity and stability and imposes no structural constraints on the original state space. However, PRBT requires solving two algebraic Riccati equations (AREs), whose computational comple...

1999
Jim Douglas Seongjai Kim

We study accuracy of alternating direction implicit (ADI) methods for parabolic equations. The original ADI method applied to parabolic equations is a perturbation of the Crank-Nicolson di erence equation and has second-order accuracy both in space and time. The perturbation error is on the same order as the discretization error, in terms of mathematical description. However, we often observe i...

2009
A. K. Chowdhury Ashis K. Chowdhury

Near Net Shape (NNS) manufacturing produces the engineering components closer to its final specification in single stage or minimum number of stages. ADI process technology is one of the NNS manufacturing technologies, currently being followed by the industries for manufacturing of engineering components at competitive price. Austempered Ductile Iron is a new class of engineering material which...

Journal: :Axioms 2022

The leapfrog schemes have been developed for unconditionally stable alternating-direction implicit (ADI) finite-difference time-domain (FDTD) method, and recently the complying-divergence (CDI) FDTD method. In this paper, formulations from time-collocated to fundamental are presented ADI CDI methods. For implemented using E-E E-H update procedures, which comprise simple concise right-hand sides...

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