نتایج جستجو برای: two time scale perturbation
تعداد نتایج: 4254396 فیلتر نتایج به سال:
the major purpose of this study was to develop the translation teacher competency test (ttct) and examine its construct and predictive validity. the present study was conducted in two phases: a qualitative phase as well as a quantitative phase. in the first phase of the study, the author attempted to find out the major areas of competency required for an academic translation teacher. the second...
The sensitivity of long-term averaged air–sea fluxes calculated by a 3D atmospheric general circulation model to SST perturbations of an idealized spatial structure is investigated as a function of the SST perturbation amplitude, spatial scale, latitude, and season. This sensitivity is a dominant, yet largely unknown, parameter determining the stability and variability behavior of ocean-only mo...
just as motivation is important in sla research, demotivation constitutes an important factor, too. there are many studies done on demotivation and burnout of teachers. many of these studies have been conducted on one or two aspects of english instruction. consequently, there are few studies which have been done on more than two aspects of english teaching. the aim of this study is to find out ...
In this paper we specifically studied one aspect of foreground primordial matter density perturbations: the relative gravitational time delay between a pair of light paths converging towards an observer and originating from two points on the last scattering surface separated by the physical scale of an acoustic oscillation. It is found that in principle time delay biases the size of acoustic os...
A singularly perturbed model is proposed for a system comprised of a PEM Fuel Cell(PEM-FC) with Natural Gas Hydrogen Reformer (NG-HR). This eighteenth order system is decomposedinto slow and fast lower order subsystems using singular perturbation techniques that provides tools forseparation and order reduction. Then, three different types of controllers, namely an optimal full-order,a near-opti...
Transversal vibrations of an axially moving string under boundary damping are investigated. Mathematically, it represents a homogenous linear partial differential equation subject to nonhomogeneous boundary conditions. The string is moving with a relatively (low) constant speed, which is considered to be positive. The string is kept fixed at the first end, while the other end is tied with the ...
here, a new method called aboodh transform homotopy perturbation method(athpm) is used to solve nonlinear partial di erential equations, we presenta reliable combination of homotopy perturbation method and aboodh transformto investigate some nonlinear partial di erential equations. the nonlinearterms can be handled by the use of homotopy perturbation method. the resultsshow the eciency of this...
Abstract– In this paper, vibration suppression and control of a smart flexible satellite maneuvering in a circular orbit are studied. The satellite is considered as a rigid hub and two flexible appendages with PZT (lead zirconate titanate) layers attached on them as sensors and actuators. Flexible satellite governing equations of motion are obtained using Lagrange-RayleighRitz technique and ass...
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