نتایج جستجو برای: planar frame

تعداد نتایج: 164622  

Abbas Takavar Armaghan Fard-Esfahani, Babak Fallahi, Davood Beiki, Kaveh Khatami Kianoush Ansari Gilani Mohammad Eftekhari, Mohsen Saghari

Introduction: Hemangiomas are the most frequent benign tumors of the liver and detecting them from metastasis or other malignant hepatic tumors is of outmost importance. 99mTc- RBC scan is highly specific and is the method of choice for this differentiation. This scintigraphy is performed in Planar and SPECT modes. These two procedures are in agreement most of the times, however since SPE...

Journal: :iranian journal of nuclear medicine 0
mpumelelo nyathi department of medical physics, faculty of health sciences, smu, pretoria, south africa enoch sithole department of physics, faculty of pre-clinical sciences, smu, pretoria, south africa ouma ramafi department of nuclear medicine, dr. george mukhari academic hospital, pretoria, south africa

introduction: the limited resolution of the imaging system causes partial volume effects (pves). these results in spreading of image counts to the neighboring pixels. this phenomenon is called spill-out effect. this study aimed at quantifying pves using imagej. methods:technetium-99m solution of concentration of 74 kbq/ml was filled into spheres a, b and c of diameters: 26 mm, 20 mm and 16 mm r...

Journal: :transactions on combinatorics 0
zeinab jafari islamic azad university, central tehran branch mehrdad azadi islamic azad university, central tehran branch

let $r$ be a commutative ring with identity‎. ‎we use‎ ‎$varphi (r)$ to denote the comaximal ideal graph‎. ‎the vertices‎ ‎of $varphi (r)$ are proper ideals of r which are not contained‎ ‎in the jacobson radical of $r$‎, ‎and two vertices $i$ and $j$ are‎ ‎adjacent if and only if $i‎ + ‎j = r$‎. ‎in this paper we show some‎ ‎properties of this graph together with planarity of line graph‎ ‎assoc...

Journal: :transactions on combinatorics 2015
r. kala s. kavitha

the zero-divisor graph of a commutative ring r with respect to nilpotent elements is a simple undirected graph $gamma_n^*(r)$ with vertex set z_n(r)*, and two vertices x and y are adjacent if and only if xy is nilpotent and xy is nonzero, where z_n(r)={x in r: xy is nilpotent, for some y in r^*}. in this paper, we investigate the basic properties of $gamma_n^*(r)$. we discuss when it will be eu...

Journal: :bulletin of the iranian mathematical society 2011
m. r. abdollahpour a. najati

in this paper we introduce and study besselian $g$-frames. we show that the kernel of associated synthesis operator for a besselian $g$-frame is finite dimensional. we also introduce $alpha$-dual of a $g$-frame and we get some results when we use the hilbert-schmidt norm for the members of a $g$-frame in a finite dimensional hilbert space.

Journal: :Mechanism and Machine Theory 2022

In this paper, two often-employed alternatives to the semi-recursive method are described and compared in terms of velocity transformation. The text offers a simplified way understand theory behind approaches. Focusing on planar cases, particular attention is given reference joint coordinates. Consequently, multibody modeling analyst that familiar with global formulations can easily extend his/...

M. Rabbani, S. M. T. Fatemi Ghomi,

Considering the network structure is one of the new approaches in studying stochastic PERT networks (SPN). In this paper, planar networks are studied as a special class of networks. Two structural reducible mechanisms titled arc contraction and deletion are developed to convert any planar network to a series-parallel network structure. In series-parallel SPN, the completion time distribution f...

Journal: :Journal of magnetic resonance imaging : JMRI 2017
Esra Abaci Turk Jie Luo Borjan Gagoski Javier Pascau Carolina Bibbo Julian N Robinson P Ellen Grant Elfar Adalsteinsson Polina Golland Norberto Malpica

PURPOSE To present a method for spatiotemporal alignment of in-utero magnetic resonance imaging (MRI) time series acquired during maternal hyperoxia for enabling improved quantitative tracking of blood oxygen level-dependent (BOLD) signal changes that characterize oxygen transport through the placenta to fetal organs. MATERIALS AND METHODS The proposed pipeline for spatiotemporal alignment of...

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