Results 21 to 30 of about 2,691,356 (263)

Numerical Simulation of Near-Surface Wind during a Severe Wind Event in a Complex Terrain by Multisource Data Assimilation and Dynamic Downscaling

open access: yesAdvances in Meteorology, 2020
Accurate forecast and simulation of near-surface wind is a great challenge for numerical weather prediction models due to the significant transient and intermittent nature of near-surface wind.
De Zhang   +4 more
doaj   +1 more source

L 2 Model Reduction and Variance Reduction

open access: yesIFAC Proceedings Volumes, 2000
The authors study several variance properties related to model reduction for finite impulse response (FIR) and output error (OE) models. The variances of two models, one deduced directly from data and the other by reducing a high order model by \(L_2\) model reduction, are compared.
Tjärnström, F., Ljung, L.
openaire   +3 more sources

Randomized model order reduction [PDF]

open access: yesAdvances in Computational Mathematics, 2019
Singular value decomposition (SVD) has a crucial role in model order reduction. It is often utilized in the offline stage to compute basis functions that project the high-dimensional nonlinear problem into a low-dimensionsl model which is, then, evaluated cheaply. It constitutes a building block for many techniques such as e.g.
Alla A., Kutz J. N.
openaire   +2 more sources

FUZZY CONTROLLER OF MODEL REDUCTION DISTILLATION COLUMN WITH MINIMAL RULES [PDF]

open access: yesApplied Computer Science, 2020
In this paper the control of a binary distillation column is described. This con-trol is done with fuzzy logic, one with PI- like fuzzy controller and the other with modified PI fuzzy controller, using the minimal rules for fuzzy pro-cessing.
Nasir ALAWAD, Afaf ALSEADY
doaj   +1 more source

Model and Controller Order Reduction for Infinite Dimensional Systems [PDF]

open access: yesITB Journal of Engineering Science, 2010
This paper presents a reduced order model problem using reciprocal transformation and balanced truncation followed by low order controller design of infinite dimensional systems.
Fatmawati   +3 more
doaj   +1 more source

GENETIC ALGORITHM-PID CONTROLLER FOR MODEL ORDER REDUCTION PANTOGRAPHCATENARY SYSTEM [PDF]

open access: yesApplied Computer Science, 2021
Controlling the contact force between the pantograph and the catenary has come to be a requirement for improving the performances and affectivity of high-speed train systems Indeed, these performances can also significantly be decreased due to the fact ...
Nasir A. AL-AWAD   +2 more
doaj   +1 more source

Finite Element–Boundary Element Acoustic Backscattering with Model Reduction of Surface Pressure Based on Coherent Clusters

open access: yesAcoustics, 2023
Computing backscattering of harmonic acoustic waves from underwater elastic targets of arbitrary shape is a problem of considerable practical significance.
Petr Krysl, Ahmad T. Abawi
doaj   +1 more source

Simple model for drag reduction [PDF]

open access: yesPhysical Review E, 2003
Direct Numerical Simulations established that the FENE-P model of viscoelastic flows exhibits the phenomenon of turbulent drag reduction which is caused in experiments by dilute polymeric additives. To gain analytic understanding of the phenomenon we introduce in this Letter a simple 1-dimensional model of the FENE-P equations.
Benzi, Roberto, Procaccia, Itamar
openaire   +3 more sources

Paper Machine Modeling at Norske Skog Saugbrugs: A Mechanistic Approach [PDF]

open access: yesModeling, Identification and Control, 2002
In this paper a mechanistic model of a paper machine is presented. The model is developed as a foundation for the control of three selected variables; the basis weight, the paper ash content, and the white water total concentration (or wire tray total ...
Tor A. Hauge, Bernt Lie
doaj   +1 more source

State-space reduction and equivalence class sampling for a molecular self-assembly model [PDF]

open access: yesRoyal Society Open Science, 2016
Direct simulation of a model with a large state space will generate enormous volumes of data, much of which is not relevant to the questions under study.
Daniel M. Packwood   +2 more
doaj   +1 more source

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