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523
Determining the effective resolution of advection schemes. Part II: Numerical testing
, 2014
"... Numerical models of fluid flows calculate the resolved flow at a given grid resolution. The smallest wave resolved by the numerical scheme is deemed the effective resolution. Advection schemes are an important part of the numerical models used for computational fluid dynamics. For example, in atmos ..."
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, in atmospheric dynamical cores they control the transport of tracers. For linear schemes solving the advection equation, the effective resolution can be calculated analytically using dispersion analysis. Here, a numerical test is developed that can calculate the effective resolution of any scheme (linear or non
Coil sensitivity encoding for fast MRI. In:
- Proceedings of the ISMRM 6th Annual Meeting,
, 1998
"... New theoretical and practical concepts are presented for considerably enhancing the performance of magnetic resonance imaging (MRI) by means of arrays of multiple receiver coils. Sensitivity encoding (SENSE) is based on the fact that receiver sensitivity generally has an encoding effect complementa ..."
Abstract
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Cited by 193 (3 self)
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New theoretical and practical concepts are presented for considerably enhancing the performance of magnetic resonance imaging (MRI) by means of arrays of multiple receiver coils. Sensitivity encoding (SENSE) is based on the fact that receiver sensitivity generally has an encoding effect
Effect of temporal envelope smearing on speech reception.
- International Journal of Bioelectromagnetism
, 2011
"... The effect of smearing the temporal envelope on the speech-reception threshold (SRT) for sentences in noise and on phoneme identification was investigated for normal-hearing listeners. For this purpose, the speech signal was split up into a series of frequency bands (width of The ear's resolut ..."
Abstract
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Cited by 145 (0 self)
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-hearing listeners, the speechreception threshold (SRT) in noise, defined as the speechto-noise ratio at which 50% of short everyday sentences are reproduced correctly, is about -5 dB • An interesting question is: How critical is the resolution in frequency and What is the effect of reducing the degree to which
METHODS FOR SOLVING ADVECTION EQUATIONS
"... Abstract. We introduce a new class of methods for solving non-stationary advection equations. The new methods are based on finite volume space discretizations and a semi-implicit discretization in time. Its basic idea is that outflow from a cell is treated explicitly while inflow is treated implicit ..."
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on the upstream weighted averages with coefficients determined by the flux-corrected transport approach [2, 19] yielding high resolution versions, S1I2OE and S2I2OE, of the basic scheme. We prove that our new method is exact for any choice of a discrete time step on uniform rectangular grids in the case
Generalized Fourier Analyses of the Advection-Diffusion Equation- Part 11: Two-Dimensional Domains
"... Part I of this work presents a detailed multi-methods comparison of the spatial errors associated with the one-dimensional finite difference, finite element and finite volume semi-discretizations of the scalar advection-diffusion equation. In Part I1 we extend the analysis to two-dimensional domain ..."
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Part I of this work presents a detailed multi-methods comparison of the spatial errors associated with the one-dimensional finite difference, finite element and finite volume semi-discretizations of the scalar advection-diffusion equation. In Part I1 we extend the analysis to two
Advection—diffusion equations for generalized tactic searching behaviors
, 1995
"... Abstract. Many organisms search for limiting resources by using repeated responses to local cues, which cumulatively cause movement towards more favorable parts of their environment. This paper presents a general asymptotic expression, derived under the assumption of shallow environmental gradients, ..."
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, for the population-level flux of organisms moving at a constant speed and reorienting at rates determined by the environmental conditions experienced since the last reorientation. The expression takes the form of an advection-diffusion equation, in which the diffusivity and advection velocity are determined
Dispersion analysis of Discontinuous Galerkin Schemes applied to Poincaré, Kelvin and Rossby waves
"... A technique for analyzing dispersion properties of numerical schemes is proposed. The method is able to deal with both non dispersive or dispersive waves, i.e. waves for which the phase speed varies with wavenumber. It can be applied to unstructured grids and to finite domains with or without period ..."
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A technique for analyzing dispersion properties of numerical schemes is proposed. The method is able to deal with both non dispersive or dispersive waves, i.e. waves for which the phase speed varies with wavenumber. It can be applied to unstructured grids and to finite domains with or without
Dispersion and Cost Analysis of Some Finite Difference Schemes in One-Parameter Acoustic Wave Modeling
, 1994
"... A systematic comparison is carried out between some standard finite difference schemes, regarding their costs and dispersion properties. To be more specific, given a precision threshold to be imposed on the velocity error and a finite difference scheme, it is possible to determine a time-step and a ..."
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A systematic comparison is carried out between some standard finite difference schemes, regarding their costs and dispersion properties. To be more specific, given a precision threshold to be imposed on the velocity error and a finite difference scheme, it is possible to determine a time-step and a
See What You Want to See: Motivational Influences on Visual Perception,”
- Journal of Personality and Social Psychology,
, 2006
"... People's motivational states-their wishes and preferences-influence their processing of visual stimuli. In 5 studies, participants shown an ambiguous figure (e.g., one that could be seen either as the letter B or the number 13) tended to report seeing the interpretation that assigned them to o ..."
Abstract
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Cited by 79 (1 self)
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errors that precluded them from desiring the target animal. No one reported seeing both interpretations of the ambiguous figure. These omissions left data from 43 participants for analysis. We used the same type of coding scheme for interpretations as in the previous studies. Given the natural bias
Gender ecognition from speech. Part I: Coarse analysis
, 1991
"... purpose of this research was to investigate the potential effectiveness of digital speech processing a d pattern ecognition echniques for the automatic re ognition of gender from speech segments. In this paper "coarse " acoustic coefficients (autocorrelation, linear prediction, cepstrum, a ..."
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, and reflection) were used to form test and reference templates for vowels, voiced fricatives, and unvoiced fricatives. The effects of different distance measures, filter orders, recognition schemes, and vowels and fricatives were comparatively assessed to determine their effectiveness forthe task of gender
Results 1 - 10
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523
