نتایج جستجو برای: atomic density

تعداد نتایج: 492062  

2011
Kai Cordes Oliver Topic Manuel Scherer Carsten Klempt Bodo Rosenhahn Jörn Ostermann

We present a method to classify atomic density distributions using CCD images obtained in a quantum optics experiment. The classification is based on the scale invariant detection and precise localization of the central blob in the input image structure. The key idea is the usage of an a priori known shape of the feature in the image scale space. This approach results in higher localization acc...

2015
Carlos O.S. Sorzano Javier Vargas Joaquín Otón Vahid Abrishami José M. de la Rosa-Trevín Sandra del Riego Alejandro Fernández-Alderete Carlos Martínez-Rey Roberto Marabini José M. Carazo

New image processing methodologies and algorithms have greatly contributed to the signi cant progress in three-dimensional electron microscopy (3DEM) of biological complexes we have seen over the last decades. Naturally, the availability of accurate procedures for the objective testing of new algorithms is a crucial requirement for the further advancement of the eld. A good and accepted testing...

2000
Erica Harvey Chaim Gingold

Chaim Gingold Research Assistant West Virginia Virtual Environments Laboratory [email protected] Three-dimensional functions that represent atomic orbitals are traditionally difficult for chemistry students to conceptualize. Large sections of undergraduate physical chemistry texts are devoted to breaking apart and simplifying electron density functions so they can be visually represented. Tr...

Journal: :Acta Crystallographica Section A Foundations of Crystallography 1981

Journal: :journal of physical & theoretical chemistry 2006
gholam hossein shafiee abdolreza sadjadi cina foroutan nejad

topological analysis has been performed on the total electron density of the two forms of ozonemolecule,c2v and d3h ,to investigate the nature of chemical bonds ,molecular structure , atomiccharges and electrical properties. while these concepts have been completely discussed usingclassical models the emphasize in this work is based on quantum theory of atoms in molecules(qtaim). because the d3...

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