نتایج جستجو برای: periodic order and octagonal quasi

تعداد نتایج: 16924452  

2010
R.R.A. Syms T. Floume I. R. Young L. Solymar M. Rea

A flexible birdcage-type resonant RF detector for magnetic resonance imaging is described. The circuit consists of a polygonal ring of magnetically coupled L–C resonators, a periodic structure supporting backward magnetoinductive waves. The elements are mechanically linked to allow relative rotation, and the pivot point is optimised to hold the nearest-neighbour coupling coefficient invariant t...

2007
Pablo S. Casas Àngel Jorba

We follow the unstable manifold of periodic and quasi-periodic solutions for the Poiseuille problem, using two formulations: holding constant flux or mean pressure gradient. By means of a numerical integrator of the Navier-Stokes equations, we let the fluid evolve from a perturbed unstable solution. We detect several connections among different configurations of the flow such as laminar, period...

Journal: :Image Vision Comput. 2008
Igor N. Aizenberg Constantine Butakoff

This paper presents an efficient method of quasi-periodic noise detection and filtering. Taking into account that periodic noise leaves peaks in the amplitude spectrum, the proposed approach focuses on their detection and elimination. The detection is performed semiautomatically using a local median whereupon the localized peaks are eliminated by a modified Gaussian notch filter. The proposed a...

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2013

Journal: :Commentarii Mathematici Helvetici 2008

Journal: :International Astronomical Union Colloquium 1979

Journal: :Microscopy and Microanalysis 2002

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم انسانی 1390

abstract al- muntazam by ibn al -jawzi is one of the greatest the book ancient book of texts on history of islam in the 6th century.it is very important one;because of including rare reports which are not found any where.in addition to historical reports,his outlook , in which embodies information on mythologies, milal wa nihal (sects and creeds), geography, and political, social and religiou...

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