Results 21 to 30 of about 19,179,679 (309)

Changes in the Seasonally Frozen Ground Over the Eastern Qinghai-Tibet Plateau in the Past 60 Years

open access: yesFrontiers in Earth Science, 2020
The Qinghai-Tibet Plateau (QTP) has the largest extent of high altitude permafrost at the middle and low latitudes in northern hemisphere and is surrounded by dozens of seasonally frozen ground.
Chenghai Wang   +3 more
doaj   +1 more source

Mixed method of model reduction for uncertain systems [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2007
A mixed method for reducing a higher order uncertain system to a stable reduced order one is proposed. Interval arithmetic is used to construct a generalized Routh table for determining the denominator polynomial of the reduced system.
Selvaganesan N.
doaj   +1 more source

On Model Order Reduction of Interconnect Circuit Network: A Fast and Accurate Method

open access: yesMathematics, 2021
The time cost in integrated circuit simulation is an important consideration in the design. This paper investigates the model order reduction of interconnect circuit networks to facilitate numerical analysis.
Xinsheng Wang   +3 more
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

Error estimation of a proper orthogonal decomposition reduced model of a permanent magnet synchronous machine [PDF]

open access: yes, 2014
Model order reduction methods, like the proper orthogonal decomposition (POD), enable to reduce dramatically the size of a finite element (FE) model.
MAC, Hung   +2 more
core   +1 more source

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

Mixed Generalized Multiscale Finite Element Method for a Simplified Magnetohydrodynamics Problem in Perforated Domains

open access: yesComputation, 2020
In this paper, we consider a coupled system of equations that describes simplified magnetohydrodynamics (MHD) problem in perforated domains. We construct a fine grid that resolves the perforations on the grid level in order to use a traditional ...
Valentin Alekseev   +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.
Fredrik Tjärnström, Lennart Ljung
openaire   +3 more sources

Model Reduction Software in the SLICOT Library [PDF]

open access: yes, 2000
We describe the model reduction software developed recently for the control and systems library SLICOT. Besides a powerful collection of Fortran 77 routines implementing the last algorithmic developments for several well-known balancing related methods,
A. Varga   +3 more
core   +1 more source

CardiacModelling/model-reduction-manifold-boundaries: Published version

open access: yes, 2022
Scripts and data for ion channel model reduction using the manifold boundary approximation method (MBAM) and parameter inference using Myokit and PINTS modules in Python.
Gary Mirams   +2 more
core   +1 more source

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