Results 221 to 230 of about 2,990,696 (280)

Bridging Continuous and Discrete Models of the Anterior Temporal Lobe via Cortical Gradients

Alam TG, de Schotten MT, Binney R, Wang X, Margulies D, Jefferies B.   +5 more
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Predictive Value of Machine Learning for Poststroke Mortality Risk: Systematic Review and Meta-Analysis.

J Med Internet Res
Chen Y, Ou Z, Deng Y, Luo A, Li X, Yang Y, Yang Q, Wu X, Zhou M.   +8 more
europepmc   +1 more source

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Analysis on matrix gradient coil modeling

Magnetic Resonance Materials in Physics, Biology and Medicine, 2022
The current distribution of the matrix gradient coil can be optimized via matrix gradient coil modeling to reduce the Lorentz force on individual coil elements. Two different modeling approaches are adopted, and their respective characteristics are summarized.The magnetic field at each coil element is calculated.
Hongyan He, Shufeng Wei, Huixian Wang, Wenhui Yang   +3 more
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Advanced Compositional Gradient Analysis

SPE Annual Technical Conference and Exhibition, 2008
Abstract Steep gradients are common in gas condensate and volatile oil reservoirs, but they are also present in heavy oils reservoirs. There are numerous publications (Creek, 1985, Lars Høier, 2000, Montel, 2002, Firoozabadi, 1999, Ghorayeb, 2003, Fujisawa, 2004, Elshahawi, 2005, and Kabir, 2006) that have dealt with complex fluid ...
Jesús Cañas, Julian Pop, Francois Dubost, Hani Elshahawi   +3 more
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High-Resolution Density Gradient Sedimentation Analysis

Science, 1960
The principle of stability for a sample layered in a density-gradient liquid column is discussed, and a method for separating ribonucleoprotein particles by means of sedimentation in the ultracentrifuge is described.
Britten, R. J., Roberts, R. B.
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Gradient Analysis of Ecosystems

1991
Comparative studies have been useful for understanding the biogeochemistry of terrestrial ecosystems, particularly where comparisons can be carried out along gradients of an underlying controlling factor. Examples of the application of gradient approaches include the analysis of state factors developed by Hans Jenny, analyses of the regulation of ...
Peter M. Vitousek, Pamela A. Matson
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Stereological analysis and modelling of gradient structures

Journal of Microscopy, 1999
Gradient structures are inhomogeneous along a particular gradient direction but homogeneous perpendicular to that direction. Consequently, structural parameters such as volume fraction or surface area density are local characteristics which depend on the ‘vertical’ coordinate with respect to the ‘vertical’ gradient axis.Analogously, models for gradient
U. Hahn, A. Micheletti, R. Pohlink, D. Stoyan, H. Wendrock   +4 more
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Computational post failure analysis with a second gradient theory

European Journal of Environmental and Civil Engineering, 2010
This article presents a theory of Gradient Elastoplasticity for strain-softening materials, in which internal length scales are present in both the elastic and the elastoplastic regime. A numerical discretisation based on the displacement formulation and a C1 finite element is used.
Zervos, A., Papanastasiou, Panos C., Zervos, A., Papanastasiou, Panos C.   +3 more
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Direct Gradient Analysis

1978
Community samples (‘Aufnahmen,’ releves) are the essential working material for gradient analysis. The procedures to be described below can (with some limitations) be applied to any kind of community sample. Thus one can, in principle, use for gradient analysis samples of the vascular plants of forests, lichens on the barks of trees, singing bird pairs
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