نتایج جستجو برای: periodic approach

تعداد نتایج: 1365006  

Journal: :Transportation Research Part B: Methodological 2019

Journal: :Computer and Information Science 2011

Journal: :IEEE Transactions on Antennas and Propagation 1975

Journal: :journal of mahani mathematical research center 0
elham shamsara department of applied mathematics, faculty of mathematical sciences, ferdowsi university of mashhad (fum), mashhad, iran. zahra afsharnezhad department of applied mathematics, faculty of mathematical sciences, ferdowsi university of mashhad (fum), mashhad, iran. jamal shamsara pharmaceutical research center, school of pharmacy, mashhad university of medical sciences, mashhad, iran.

in this paper, a three dimensional mathematical model for htlv-1infection with intracellular delay and immune activation delay is investigated.by applying the frequency domain approach, we show that time delays candestabilize the ham/tsp equilibrium, leading to hopf bifurcations and sta-ble or unstable periodic oscillations. at the end, numerical simulations areillustrated.

Journal: :Image Vision Comput. 2008
Igor N. Aizenberg Constantine Butakoff

This paper presents an efficient method of quasi-periodic noise detection and filtering. Taking into account that periodic noise leaves peaks in the amplitude spectrum, the proposed approach focuses on their detection and elimination. The detection is performed semiautomatically using a local median whereupon the localized peaks are eliminated by a modified Gaussian notch filter. The proposed a...

Journal: :Optics express 2011
Koki Watanabe Jaromír Pištora Yoshimasa Nakatake

This paper proposes a spectral-domain approach to the electromagnetic scattering problem of lamellar grating with defects. The fields in imperfectly periodic structures have continuous spectra in the wavenumber space, and the main problem of the spectral-domain approach is connected to the discretization scheme on the wavenumber. The present approach introduces the pseudo-periodic Fourier trans...

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.

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