نتایج جستجو برای: cone models

تعداد نتایج: 946938  

Journal: :Physical review 2021

We present an $LC$ circuit model that supports a tilted ``Dirac cone'' in its spectrum. The tilt of the Dirac cone is specified by parameters consisting mutual inductance between neighboring sites and capacitance ${C}_{0}$ at every lattice site. These can be completely measured impedance spectroscopy. Given described background spacetime metric, spectroscopy perfectly provide (local) informatio...

Journal: :sahand communications in mathematical analysis 0
kamal fallahi department of mathematics, payame noor university, p.o. box 19395-3697, tehran, iran. ghasem soleimani rad department of mathematics, payame noor university, p.o. box 19395-3697, tehran, iran.

in this paper, we prove the existence of fixed point for chatterjea type mappings under $c$-distance in cone metric spaces endowed with a graph. the main results extend, generalized and unified some fixed point theorems on $c$-distance in metric and cone metric spaces.

G. Soleimani Rad H. Rahimi,

Recently, Cho et al. [Y. J. Cho, R. Saadati, S. H. Wang, Common xed point theorems on generalized distance in ordered cone metric spaces, Comput. Math. Appl. 61 (2011) 1254-1260] dened the concept of the c-distance in a cone metric space and proved some xed point theorems on c-distance. In this paper, we prove some new xed point and common xed point theorems by using the distance in ordered con...

Journal: :Applied Mathematics and Computer Science 2009
Tadeusz Kaczorek

In positive systems inputs, state variables and outputs take only non-negative values. Examples of positive systems are industrial processes involving chemical reactors, heat exchangers and distillation columns, storage systems, compartmental systems, water and atmospheric pollution models. A variety of models having positive linear systems behaviour can be found in engineering, management scie...

2016
Grace Tang Christopher Moussot Daniel Morf Edward Seppi Howard Amols

Most of the treatment units, both new and old models, are equipped with a megavoltage portal imager but its use for volumetric imaging is limited. This is mainly due to the poor image quality produced by the high-energy treatment beam (> 6MV). A linac at our center is equipped with a prototype 2.5 MV imaging beam. This study evaluates the feasibility of low-dose megavoltage cone-beam imaging wi...

2010
Arthur Krigel Marie-Paule Felder-Schmittbuhl David Hicks

PURPOSE Whereas much information is available on rod outer segment phagocytosis by the retinal pigmented epithelium (RPE), corresponding data for cones are quite limited, especially in laboratory models of normal rats and mice with very low cone numbers. To characterize the light and circadian control of cone photoreceptor phagocytosis in mice, we capitalized on the blue cone-like phenotype of ...

Journal: :journal of mining and environment 2012
ebrahim elahi reza kakaie amir yusefi

ultimate limits of an open pit, which define its size and shape at the end of the mine’s life, is the pit with the highest profit value. a number of algorithms such as floating or moving cone method, floating cone method ii and the corrected forms of this method, the korobov algorithm and the corrected form of this method, dynamic programming and the lerchs and grossmann algorithm based on grap...

Faegheh Gholinia, Mahsa Pourgholi,

Background and Purpose:  Due to the important role of imaging in the diagnosis and treatment plan in orthodontics, CBCT (Cone Beam Computed Tomography) images because of their three-dimensional nature, can minimize the disadvantages of two-dimensional images such as magnification, distortion, or superimposition. The purpose of this study was to evaluate the accuracy of conventional cephalograms...

1998
Thomas Heinzl

We review the foundations as well as a number of important applications of light-cone dynamics. Beginning with the peculiarities of relativistic particle dynamics we discuss the choice of a time parameter as the gauge fixing within reparametrization invariant dynamical systems. Including Poincaré invariance, we are naturally led to Dirac’s forms of relativistic dynamics. Among these, the front ...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2012
Barry B Lee Robert M Shapley Michael J Hawken Hao Sun

Receptive fields of midget ganglion cells and parvocellular lateral geniculate nucleus (LGN) neurons show color-opponent responses because they receive antagonistic input from the middle- and long-wavelength sensitive cones. It has been controversial as to whether this opponency can derive from random connectivity; if receptive field centers of cells near the fovea are cone-specific due to midg...

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