نتایج جستجو برای: fractional regression

تعداد نتایج: 374976  

Journal: :AJNR. American journal of neuroradiology 2016
A Meoded A V Faria A L Hartman G I Jallo S Mori M V Johnston T A G M Huisman A Poretti

BACKGROUND AND PURPOSE Hemispherectomy is a neurosurgical procedure to treat children with intractable seizures. Postsurgical improvement of cognitive and behavioral functions is observed in children after hemispherectomy suggesting plastic reorganization of the brain. Our aim was to characterize changes in DTI scalars in WM tracts of the remaining hemisphere in children after hemispherectomy, ...

Journal: :The Journal of nutrition 2012
Christine M Pfeiffer Jeffery P Hughes Ramon A Durazo-Arvizu David A Lacher Christopher T Sempos Mindy Zhang Elizabeth A Yetley Clifford L Johnson

The NHANES measured serum and RBC folate concentrations by using a radioassay during prefortification (1988-1994) and postfortification (1999-2006) periods followed by the use of a microbiologic assay (MBA) from 2007-2010. The MBA produces higher concentrations than does the radioassay and is considered to be more accurate. To allow for accurate long-term trending (1988-2010), we evaluated diff...

Journal: :Stroke 1992
S G Timsit R L Sacco J P Mohr M A Foulkes T K Tatemichi P A Wolf T R Price D B Hier

BACKGROUND AND PURPOSE Hyperacute cerebral infarction trials require early differentiation of infarction subtype. Our aim was to determine clinical factors predictive of infarction subtype from data collected in the early hours of admission. METHODS Using the 1,273 patients enrolled in the Stroke Data Bank, stroke risk factors and demographic, clinical, and radiological features were compared...

Journal: :Journal of the American Academy of Child and Adolescent Psychiatry 2005
Sanjiv Kumra Manzar Ashtari Kelly L Cervellione Inika Henderson Hana Kester David Roofeh Jinghui Wu Tana Clarke Emily Thaden John M Kane Joseph Rhinewine Todd Lencz Alan Diamond Babak A Ardekani Philip R Szeszko

OBJECTIVE To investigate abnormalities in the structural integrity of brain white matter as suggested by diffusion tensor imaging in adolescents with early-onset schizophrenia (onset of psychosis by age 18). METHOD Twenty-six patients with schizophrenia and 34 age- and gender-matched healthy volunteers received diffusion tensor imaging and structural magnetic resonance imaging examinations. F...

The theory of derivatives and integrals of fractional in fractional calculus have found enormousapplications in mathematics, physics and engineering so for that reason we need an efficient and accurate computational method for the solution of fractional differential equations. This paper presents a numerical method for solving a class of linear and nonlinear multi-order fractional differential ...

A. G. Ghazanfari B. Ghazanfari

In this paper, we apply fractional complex transform to convert the fractional nonlinear Schr"{o}dinger equations to the nonlinear Schr"{o}dinger equations.  

Journal: :sahand communications in mathematical analysis 0
mohsen alimohammady department of mathematics, university of mazandaran, babolsar, iran. fariba fattahi department of mathematics, university of mazandaran, babolsar, iran.

this work concerns the study of existence and uniqueness to heat equation with fractional laplacian di erentiation in extended colombeau algebra.

Journal: :bulletin of the iranian mathematical society 2014
yufeng xu vedat suat ertürk

‎in this article‎, we use a finite difference technique‎ ‎to solve variable-order fractional integro-differential equations‎ ‎(vofides‎, ‎for short)‎. ‎in these equations‎, ‎the variable-order fractional integration(vofi) and‎ ‎variable-order fractional derivative (vofd) are described in the‎ ‎riemann-liouville's and caputo's sense,respectively‎. ‎numerical experiments‎, ‎consisting of two exam...

Journal: :bulletin of the iranian mathematical society 2014
p. mokhtary f. ghoreishi

‎in this paper‎, ‎a spectral tau method for solving fractional riccati‎ ‎differential equations is considered‎. ‎this technique describes‎ ‎converting of a given fractional riccati differential equation to a‎ ‎system of nonlinear algebraic equations by using some simple‎ ‎matrices‎. ‎we use fractional derivatives in the caputo form‎. ‎convergence analysis of the proposed method is given an...

In this paper, the homotopy perturbation method (HPM) is applied to obtain an approximate solution of the fractional Bratu-type equations. The convergence of the method is also studied. The fractional derivatives are described in the modied Riemann-Liouville sense. The results show that the proposed method is very ecient and convenient and can readily be applied to a large class of fractional p...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید