نتایج جستجو برای: Geometry

تعداد نتایج: 144594  

Journal: :Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 2008

Journal: :Bulletin of the American Mathematical Society 1955

2004
Gheorghe Munteanu

Asking that the metric of a complex Finsler space should be strong convex, Abate and Patrizio ([1]) associate to the real tangent bundle a real Finsler metric for which they analyze the relation between Cartan (real) connection of the obtained space and the real image of Chern-Finsler complex connection. Following the same ideas, in the present paper we shall deal with the more general case of ...

2007
Jonathan P. Seldin Marcia Ascher

In [3], in my argument for the primacy of Euclidean geometry on the basis of rigid motions and the existence of similar but non-congruent triangles, I wrote the following: A: “The mobility of rigid objects is now recognized as one of the things every normal human child learns in infancy, and this learning appears to be part of our biological progaramming.” B. “. . . we are all used to thinking ...

تقی پور آذر, یاور, جانبازی رودبالی, مهدی, ضیایی, فرهود,

In this paper, Density Functional Theory (DFT) was utilized for the calculation of the hyperfine coupling constant and the g tensor alanine radicals at different crystal temperatures. The cluster approach was used for considering the effects of crystal environment. In the cluster approach, the careful selection of the cluster size is very important for the geometry structure of alanine and the ...

‎Two types of properties for linear connections (natural and almost paracontact metric) are discussed in almost paracontact metric geometry with respect to four linear connections‎: ‎Levi-Civita‎, ‎canonical (Zamkovoy)‎, ‎Golab and generalized dual‎. ‎Their relationship is also analyzed with a special view towards their curvature‎. ‎The particular case of an almost paracosymplectic manifold giv...

ژورنال: Journal of Railway Research 2018

A short survey on modern track maintenance methods is given, concentrating on the developments in recent years. The ongoing refinement of the machinery should be shown as the influence of IT-solutions. On top the economic view to the track infrastructure is briefly demonstrated. Further developments in track hardware solutions must respect the obtained high level of track work mechanization. H...

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