Results 31 to 40 of about 13,167,523 (376)

Density-functional thermochemistry. III. The role of exact exchange

open access: yes, 1993
Despite the remarkable thermochemical accuracy of Kohn–Sham density‐functional theories with gradient corrections for exchange‐correlation [see, for example, A. D. Becke, J. Chem. Phys.
A. Becke
semanticscholar   +1 more source

Exploration, normalization, and summaries of high density oligonucleotide array probe level data.

open access: yesBiostatistics, 2003
In this paper we report exploratory analyses of high-density oligonucleotide array data from the Affymetrix GeneChip system with the objective of improving upon currently used measures of gene expression. Our analyses make use of three data sets: a small
R. Irizarry   +6 more
semanticscholar   +1 more source

Pair Densities in Density Functional Theory [PDF]

open access: yesMultiscale Modeling & Simulation, 2015
30 ...
Huajie Chen, Gero Friesecke
openaire   +3 more sources

Association between adiposity outcomes and residential density: a full-data, cross-sectional analysis of 419 562 UK Biobank adult participants

open access: yesThe Lancet Planetary Health, 2017
Background: Obesity is a major health issue and an important public health target for urban design. However, the evidence for identifying the optimum residential density in relation to obesity has been far from compelling.
Dr Chinmoy Sarkar, PhD   +2 more
doaj   +1 more source

Examination of pyroelectric power generation over a wide temperature range by controlling the Zr:Sn composition ratio of PLZST

open access: yesJournal of Asian Ceramic Societies, 2021
Several studies have been conducted on energy harvesting, which involves conversion of unused environmental energy into a power source. More than half of the energy consumed is wasted as heat.
Hironari Sugiyama   +14 more
doaj   +1 more source

Generalization Bounds via Information Density and Conditional Information Density [PDF]

open access: yes, 2020
We present a general approach, based on an exponential inequality, to derive bounds on the generalization error of randomized learning algorithms. Using this approach, we provide bounds on the average generalization error as well as bounds on its tail ...
Durisi, Giuseppe, Hellström, Fredrik
core   +2 more sources

Low-Density Parity-Check Codes

open access: yes, 2004
Low-density parity-check (LDPC) error correcting codes were introduced in 1963 by Robert Gallager in his Ph.D. thesis. The basic motivation came from the observation that random linear codes, cf.
Christian Schlegel, Lance C. Perez
semanticscholar   +1 more source

Developing the NIS solid density hydrostatic weighing system up to 20 kg

open access: yesInternational Journal of Metrology and Quality Engineering, 2020
This paper presents a developed design and construction to improve the performance and increasing the density measuring capability of the previous Hydrostatic Weighing Apparatus (HWA-NIS) at the National Institute of Standards (NIS) up to 20 kg.
Hamdy Mohamed   +3 more
doaj   +1 more source

Restoring the density-gradient expansion for exchange in solids and surfaces. [PDF]

open access: yesPhysical Review Letters, 2007
Popular modern generalized gradient approximations are biased toward the description of free-atom energies. Restoration of the first-principles gradient expansion for exchange over a wide range of density gradients eliminates this bias.
J. Perdew   +7 more
semanticscholar   +1 more source

Intrinsic-Density Functionals [PDF]

open access: yes, 2006
The Hohenberg-Kohn theorem and Kohn-Sham procedure are extended to functionals of the localized intrinsic density of a self-bound system such as a nucleus.
E. Engel   +5 more
core   +2 more sources

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