نتایج جستجو برای: elliptical opening

تعداد نتایج: 59633  

2001
George Parzen

This paper presents results for the electric field due to a uniformly charged elliptical beam in the region outside the beam. Introduction This paper presents results for the electric field due to a uniformly charged elliptical beam outside the beam. Results for the field inside inside the beam are well known [1, 2] The beam being considered extends indefinitly in the z direction and has an ell...

2010
Tong-Tong Xu Shuai Ben Jun Zhang Xu Wang J H Eberly

Using a classical ensemble method, nonsequential double ionization is predicted to exist with elliptical and circular polarization. Recollision is found to be the underlying mechanism, and it is only possible via elliptical trajectories.

Journal: :Chemical communications 2008
Chia-Min Yang Ching-Yi Lin Yasuhiro Sakamoto Wei-Chia Huang Li-Ling Chang

Mesoporous silica nanoparticles with a two-dimensional center-rectangular (plane group c2mm) lattice and coiled elliptical channels have been synthesized; the new synthetic route also allows simple control over the lattice dimensions and the elliptical shape of the channels.

2008
J. Prakash K. Rajesh

In this paper we propose a novel method for human face segmentation using the elliptical structure of the human head. It makes use of the information present in the edge map of the image. In this approach we use the fact that the eigenvalues of covariance matrix represent the elliptical structure. The large and small eigenvalues of covariance matrix are associated with major and minor axial len...

Journal: :Applied sciences 2023

The elliptical disc is a specific characteristic of triple offset butterfly valve (TOBV), but the structure leads to non-uniform distribution contact at closing position with wear. On other hand, continuous processing sections finish entire contour expensive compared circular section. In present study, improve above disadvantages an disc, elliptic cone function was established describe quadrupl...

Journal: :acta medica iranica 0
farahvash mr

congenital double lip anomaly is an infrequent developmental abnormality affecting the lips, more commonly the upper lip. 5 cases of double lip are being reported for the first time from iran and all confined to the upper lip. a new surgical excision is being introduced which is called transverse cupid bow-like elliptical incision. the previous traditional method was a simple elliptical excisio...

Journal: :Medecine sciences : M/S 2013
Paul de Brem

a. Witness Professor Reyntjens (PW77) asked permission to address the Chamber. First, he advised the Chamber that he had made an error in an answer he had given yesterday and offered further explanations. Second, he advised the Chamber that he had been given documents yesterday by Counsel for Bagosora (Mr. Constant), some of which were stamped “confidential” and which he recognized as being doc...

2017
David Cébron Michael Le Bars Claire Moutou Patrice Le Gal D. Cebron M. Le Bars C. Moutou P. Le Gal

Context. The presence of celestial companions means that any planet may be subject to three kinds of harmonic mechanical forcing: tides, precession/nutation, and libration. These forcings can generate flows in internal fluid layers, such as fluid cores and subsurface oceans, whose dynamics then significantly differ from solid body rotation. In particular, tides in non-synchronized bodies and li...

Journal: :Pattern Recognition Letters 1992
Reza Safaee-Rad Kenneth C. Smith Beno Benhabib Ivo Tchoukanov

Accurate estimation of the parameters of an elliptical shape is required in various machine-vision and computer-vision problems. In our previous work, we have addressed this problem by proposing to optimize a weighted minimum-squares-error (MSE) function. As a continuation of this work, we have studied other techniques for elliptical-parameter estimation, ones applying elliptical-Fourier descri...

2005
Gabriel Frahm Uwe Jaekel

The traditional class of elliptical distributions is extended to allow for asymmetries. A completely robust dispersion matrix estimator (the ‘spectral estimator’) for the new class of ‘generalized elliptical distributions’ is presented. It is shown that the spectral estimator corresponds to an M-estimator proposed by Tyler (1983) in the context of elliptical distributions. Both the generalizati...

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