نتایج جستجو برای: explicit stiffness

تعداد نتایج: 143043  

E. Mohammadi J. Asgari Marnani M.S. Rohanimanesh S. Tavousi

When the out-of-plane stiffness of a beam is remarkably lower than the in-plane stiffness, the lateral-torsional buckling occurs. In this study, the behavior of mono-symmetric I-beams with discrete torsional and lateral bracings under the concentrated moment is investigated using the finite element analyses. Then, based on the numerical analyses, equation for the stiffness requirement is propos...

Journal: :advanced herbal medicine 2015
morteza dehghan elham karimi shervedani

background and aims: osteoarthritis is one of the most common arthritis in elderly. we evaluated to compare the effect of topical application of eugenia caryophylata extract and topical diclofenac in primary knee osteoarthritis.methods: this randomized double-blind clinical trial study was carried out upon 105 patients with primary knee osteoarthritis. patients were selected randomly and divide...

Journal: :Theoretical Computer Science 2005

Journal: :IEEE Antennas and Wireless Propagation Letters 2023

An iterative algorithm is adopted to construct approximate representations of matrices describing the scattering properties arbitrary objects. The method based on implicit evaluation responses from iteratively generated excitations. does not require explicit knowledge any system (e.g., stiffness or impedance matrices) and well-suited for use with matrix-free full-wave solvers, such as FDTD, FEM...

Journal: :Pattern Recognition Letters 2010
Mathieu Lagrange Martin Raspaud Roland Badeau Gaël Richard

Timbre is a major cue for the human auditory system to recognize musical sounds. Timbral patterns can be decomposed in the widely used spectral envelope and the less considered temporal dynamics. In this paper, we present new temporal dynamics similarity measures, which will prove valuable for the recognition of timbral patterns. These similarity measures are evaluated, first alone, then in con...

Journal: :international journal of transportation engineering 0
babak golchin assistant professor, department of civil engineering, ahar branch, islamic azad university, ahar, iran ahmad mansourian department of bitumen and asphalt, road, housing and urban development research center, tehran, iran

this paper presents the effects of different amounts of reclaimed asphalt on fatigue life of asphalt mixtures. central composite method was used to design of experiments based on response surface method (rsm). binder type (pen 60/70 and pen 85/100), reclaimed asphalt pavement (rap) content (25, 50 and 75%) and loading strain (150, 250 and 350 micro strain) were selected as independent variables...

Journal: :archives of clinical infectious diseases 0
zohreh aminzadeh infectious diseases and tropical medicine research center, shahid beheshti university, m.c., tehran, ir iran; infectious diseases and tropical medicine research center shahid beheshti university, m.c., evin, tehran, ir iran. amir roudgari infectious diseases and tropical medicine research center, shahid beheshti university, m.c., tehran, ir iran

background optimal use of the clinical examination aids physicians in identifying patients at risk for meningitis. the low specificity of the meningeal signs may be due to the presence of cervical arthritis and spondylosis. one of the most sensitive maneuvers in the diagnosis of meningitis is jolt accentuation of headache. patients and methods a descriptive research was performed on suspected a...

Journal: :Numerische Mathematik 2021

The present paper is devoted to the convergence analysis of a class asymptotic preserving particle schemes (Filbet and Rodrigues in SIAM J. Numer. Anal. 54(2):1120–1146, 2016) for Vlasov equation with strong external magnetic field. In this regime, classical Particle-in-Cell methods are subject quite restrictive stability constraints on time space steps, due small Larmor radius plasma frequency...

Journal: :Nonlinear Dynamics 2021

Abstract Forced responses of mechanical systems are crucial design and performance criteria. Hence, their robust reliable calculation is vital importance. While numerical computation periodic benefits from an extensive mathematical basis, the literature for quasi-periodically forced limited. More specifically, absence applicable general existence criterion quasi-periodic orbits nonlinear impede...

Journal: :Composites Part B-engineering 2022

Here, we present the in-plane energy absorption characteristics of modified re-entrant auxetic honeycombs realized via fused filament fabrication in conjunction with parametric analysis and geometry optimization. The influence interaction effects geometrical parameters such as strut-length ratio joint-angles on stiffness, strength were evaluated. Subsequently, Finite Element results obtained us...

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