Results 221 to 230 of about 2,945,859 (241)

Diminished gradient dependence of density functionals: constraint satisfaction and self-interaction correction.

Journal of Chemical Physics, 2007
The Perdew-Burke-Ernzerhof (PBE) generalized gradient approximation for the exchange-correlation energy functional has two nonempirical constructions, based on satisfaction of universal exact constraints on the hole density or on the energy. We show here
G. Csonka, Oleg A. Vydrov, G. Scuseria, A. Ruzsinszky, J. Perdew   +4 more
semanticscholar   +1 more source

Passive driving forces of proximal tubular fluid and bicarbonate transport: gradient dependence of H+ secretion.

American Journal of Physiology, 1983
The effect of oncotic pressure changes on fluid (Jv) and net bicarbonate transport (JHCO-3) and the transepithelial bicarbonate permeability (PHCO-3) were measured by an improved luminal and capillary microperfusion method that allows paired experiments ...
Y. Chan, G. Malnic, G. Giebisch
semanticscholar   +1 more source

Gradient Dependence of the Intrinsic Viscosity of Linear Macromolecules

, 1956
The decrease of intrinsic viscosity with increasing gradient was found with all linear macromolecules investigated at high enough molecular weight irrespective of the solvent.
A. Peterlin, M. Copic
semanticscholar   +1 more source

Learning long-term dependencies with gradient descent is difficult [PDF]

IEEE Transactions on Neural Networks, 1994
Recurrent neural networks can be used to map input sequences to output sequences, such as for recognition, production or prediction problems. However, practical difficulties have been reported in training recurrent neural networks to perform tasks in which the temporal contingencies present in the input/output sequences span long intervals. We show why
BENGIO Y, SIMARD P, FRASCONI, PAOLO
openaire   +3 more sources

Gradient Dependence of Intrinsic Viscosity of Freely Flexible Linear Macromolecules

, 1960
In laminar flow the randomly coiled macromolecule expands nonuniformly. The averaged distances between close‐by chain elements increase much slower than those between elements situated far away on the molecular chain.
A. Peterlin
semanticscholar   +1 more source

Time-dependent gradient perturbations of fractional Laplacian

Journal of Evolution Equations, 2010
We construct a fundamental solution of the equation {\partial_t - \Delta^{\alpha/2} - b(\cdot, \cdot) \cdot\nabla_{x} = 0} for TeX{\alpha \in (1, 2)} and b satisfying a certain integral space-time condition. We also show it has α-stable upper and lower bounds.
Tomasz Jakubowski, Tomasz Jakubowski, Karol Szczypkowski   +2 more
openaire   +4 more sources

Effective field gradient dependence on write field rise time

, 1996
An analytic expression has been obtained for the field gradient of a recording head at the moment that the write process is completed. Although the head gap is assumed to be much less than the fly height, expressions for the effective spacing of wide gap
M. Mallary
semanticscholar   +1 more source

Electric field gradient dependence of excess avalanche noise

1999 Symposium on High Performance Electron Devices for Microwave and Optoelectronic Applications. EDMO (Cat. No.99TH8401), 1999
Electron initiated avalanche noise measurements were performed on two Al/sub 0.3/Ga/sub 0.7/As pn/sup +/ diodes with p-region doping density N/sub a/=1.6/spl times/10/sup 17/ cm/sup -3/ and N/sub a/=5.0/spl times/10/sup 17/ cm/sup -3/ and two Al/sub 0.3 ...
C. H. Tan, S. Plimmer, J. David, G. Rees, R. C. Tozer, J. Clark, R. Grey   +6 more
semanticscholar   +1 more source

Gradient-Dependent Damage Constitutive: The Second-Order Gradient Damage Model

Characterization, Modeling, and Performance of Geomaterials, 2009
When the strain tensor, the scalar damage quantity and the Laplacian thereof serve as the state variables of Helmholtz free energy, the general expressions of elasticity-gradient damage constitutive equations are derived directly from the basic law of irreversible thermodynamics by constitutive functional expansion method at the initial state.
Ying-ren Zheng, Ming-hua Zeng, Bing Zhao, X.S. Tang, Xiao-Qiang Yan   +4 more
openaire   +2 more sources

Anomalous Temperature Dependence of Magnetic Anisotropy in Gradient‐Composition Sputterred Thin Films

Advances in Materials, 2013
An abnormal behavior of increasing magnetic anisotropy with temperature in magnetic thin films fabricated by a gradient-composition sputtering technique is observed and consistently confirmed by two independent measurements of static magnetic hysteresis ...
N. N. Phuoc, C. Ong
semanticscholar   +1 more source