نتایج جستجو برای: perturbation and observation

تعداد نتایج: 16856996  

Journal: :Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics 1999
Y C Lai

Snapshot attractors, i.e., attractors formed by a cloud of trajectories at the same instants of time, are usually employed to reveal the fractal structure of randomly or chaotically driven dynamical systems. A necessary condition for the underlying fractal structure to be observed is that the ensemble of particles utilized in the construction of the snapshot attractors are subject to identical ...

Journal: :journal of mahani mathematical research center 0
m. karimi amaleh hormozgan university z. afsharnezhad ferdowsi university of mashhad

in the present paper the linear oscillator in r3 with z =constanthas been considered. the aim is to determine the necessary conditions forthe persistence of periodic solutions under discontinuous perturbations. a newapproach based on a computational method has been used. at the end weapply our method on an example.

2008
Justin Foley

We discuss the tuning of the anisotropic clover action and Symanzik-improved gauge action in lattice perturbation theory. The fermion action is constructed from stout-smeared spatial links, which complicates the calculation considerably. In addition, the full quark-mass dependence of the action parameters is included in this study. We present results for the fermion and gauge aspect ratios for ...

Journal: :medical journal of islamic republic of iran 0
b. akhbari physiotherapy department of university of social welfare & rehabilitationevin, daneshjoo,blvd, koodakyar ave, university of social welfare and rehabilitation ,tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم بهزیستی و توانبخشی (university of social welfare and rehabilitation sciences) i. ebrahimi takamjani rehabilitation faculty of iran university of medical sciences, mirdamad st, madar sq., tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) m. salavati physiotherapy department of university of social welfare & rehabilitationسازمان اصلی تایید شده: دانشگاه علوم بهزیستی و توانبخشی (university of social welfare and rehabilitation sciences) h. farahini iran university of medical sciences, hemmat expressway, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) m. a. sanjari rehabilitation faculty of iran university of medical sciencesسازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences)

abstract background: several studies have examined the reflex response of ankle musculature to sudden inversion in noninjured and injured subjects. to date, there have been no studies to determine the effect of versatile degrees & conditions of perturbation on the ankle musculature latency. the purpose of this study was to measure and determine whether there was a difference in ankle musculatur...

Journal: :computational methods for differential equations 0
ali beiranvand faculty of mathematical sciences, university of tabriz, tabriz, iran. karim ivaz university of tabriz, iran

we introduce and discuss the homotopy perturbation method, the adomian decomposition method and the variational iteration method for solving the stefan problem with kinetics. then, we give an example of the stefan problem with  kinetics and solve it by these methods.

B. Akhbari, H. Farahini, I. Ebrahimi Takamjani, M. Salavati, M. A. Sanjari,

 Abstract Background: Several studies have examined the reflex response of ankle musculature to sudden inversion in noninjured and injured subjects. To date, there have been no studies to determine the effect of versatile degrees & conditions of perturbation on the ankle musculature latency. The purpose of this study was to measure and determine whether there was a difference in ankle musculatu...

Objective: The aims of this study were to identify the most appropriate indicator to assess the balance in the sudden perturbation test conditions. Methods: In this study, 13 freestyle national wrestlers at the age of 20.5±2.4 and 13 normal subjects with average age of 23.5±1.4 were used recruited. Balancing test was carried out under two conditions: standing with the guard (gu...

1997
A. Viceré

We study the heavy charge potential in the Coulomb phase of pure gauge compact U(1) theory on the lattice. We calculate the static potential VW (T, ~ R) from Wilson loops on a 16 × 32 lattice and compare with the predictions of lattice perturbation theory. We investigate finite size effects and, in particular, the importance of non–Coulomb contributions to the potential. We also comment on the ...

A Ghorbanpour Arani, M Mohammadimehr M.R Mozdianfard R Kolahchi V Sadooghi

In this article, magneto-thermo-elastic stresses and perturbation of magnetic field vector are analyzed for a thick-walled cylinder made from polystyrene, reinforced with functionally graded (FG) single-walled carbon nanotubes (SWCNTs) in radial direction, while subjected to an axial and uniform magnetic field as well as a transient thermal field. Generalized plane strain state is considered in...

بازدیدی طهرانی, فرزاد, بداقی, داریوش, جدیدی, محمد, کیامنصوری, محسن,

The purpose of the present study is to investigate and analyze numerically, the effective mechanisms on the flow field and pollutant dispersion around a simple and long street canyon by means of Large Eddy Simulation (LES) approach using various inflow turbulence generation methods. For this purpose, four methods i.e. vortex, mapping, synthetic and no-inlet perturbation methods are used as infl...

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