نتایج جستجو برای: model structure
تعداد نتایج: 3408796 فیلتر نتایج به سال:
the present study examined the factor structure of the university of tehran english proficiency test (utept) that aims to examine test takers’ knowledge of grammar, vocabulary, and reading comprehension. a structural equation modelling (sem) approach was used to analyse the responses of participants (n= 850) to a 2010 version of the test. a higher-order model was postulated to test if the unde...
the performance of dual-layer multiple tuned mass dampers (dl-mtmd) with uniformly distributed natural frequencies is investigated. the dl-mtmd consists of one large tuned mass damper (l-tmd) and an arbitrary number of small tuned mass dampers (s-tmd). the primary structure is represented as a single degree-of-freedom system which corresponds to a specific vibration mode to be controlled in a r...
In this paper, several models of structure-fluid coupling are employed to investigate on the vibration behavior of the structure. Using basic equations of vibration and employing a mathematical model, a single degree of freedom system is analyzed. Some parameters of the mathematical model are obtained from test. To examine structure-flow interaction, coupled system of nonlinear second-order dif...
In this paper, we calculate nuclear structure function and EMC effect of 40Ca and 56Fe nuclei. To achive the goals, we consider Fermi motion and binding energy contrbiution in the harmonic oscillator model. In this model, harmonic oscillator parameter ħω related to shells root mean square radius and for free nucleon structure functions, is obtained from GRV’s free nucleon structure functions. ...
Abstract This paper discusses structure model based correction of thermal induced errors at machine tools. Using a evaluated in real-time, the tool center point (TCP) are calculated on information gotten from control (e.g., axes velocities, positions, and motor currents) ambient temperature. The describes physical relationships considers structural variability resulting traverse movements feed ...
the aim of this empirical study is to explore the trade-off model and pecking order model of capital structure. the investigation is performed using panel data procedures for a sample of 76 firms listed in tehran stock exchange during 2007-2010.the study employs ols regression model in examining the capital structure of firms in iran. the study employs variables reflecting differing theoretical...
Introduction: One of the most important challenges of our time is the need to have a system of disaster management to confront the natural and man made disasters. In order to set in place such a system in a country, there is an essential necessity to design a special organizational structure in the areas of disaster management. The main objective of this study...
Partial linear models provide good compromises between linear and nonparametric models. However, how to decide which covariates are linear and which are nonlinear is a long-standing problem and not completely solved yet. Two methods are commonly used in practice: the first method is based on hypotheses testing, which is theoretically challenging due to multiple nonparametric tests. The second m...
We review some selected recent results on hadron spectroscopy and related theoretical studies based on constituent quark models.
boron nitride semiconducting zigzag swcnt, $b_{cb}$$n_{cn}$$c_{1-cb-cn}$, as a potential candidate for making nanoelectronic devices was examined. in contrast to the previous dft calculations, wherein just one boron and nitrogen doping configuration have been considered, here for the average over all possible configurations, density of states (dos) was calculated in terms of boron and nitrogen ...
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