نتایج جستجو برای: double integral
تعداد نتایج: 353376 فیلتر نتایج به سال:
Journal:
:Journal of Classical Analysis
2014
Journal:
:Arabian Journal for Science and Engineering
2011
Journal:
:Research Journal of Applied Sciences, Engineering and Technology
2013
Journal:
:Journal of Inequalities and Applications
2015
Journal:
:Bulletin of the American Mathematical Society
1907
Journal:
:Journal of Drive and Control
2016
Journal:
:IOSR Journal of Mathematics
2013
Journal:
:Advances in Difference Equations
2020
Journal:
:Optics Express
2012
Journal:
:Physical review letters
2009
Guillermo Román-Pérez
José M Soler
We present an efficient implementation of the van der Waals density functional of Dion et al. [Phys. Rev. Lett. 92, 246401 (2004)], which expresses the nonlocal correlation energy as a double spatial integral. We factorize the integration kernel and use fast Fourier transforms to evaluate the self-consistent potential, total energy, and atomic forces, in O(NlogN) operations. The resulting overh...
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