نتایج جستجو برای: hysteresis cycle

تعداد نتایج: 286050  

Hysteresis loop curves are highly important for numerical simulations of materials deformation under cyclic loadings. The models mainly take account of only the tensile half of the stabilized cycle in hysteresis loop for identification of the constants which don’t vary with accumulation of plastic strain and strain range of the hysteresis loop. This approach may be quite erroneous particularly ...

Journal: :Optics letters 2005
Amitabh Joshi Wenge Yang Min Xiao

We have experimentally investigated dynamical hysteresis behavior by changing the sweeping frequency of the cavity input field in the optical bistability of rubidium atoms (in a three-level atomic-type configuration) inside an optical cavity. The shape, width (or area), and direction of the hysteresis cycle are sensitive functions of the sweeping frequency for such an optical bistable system.

Journal: :The Journal of Automatic Chemistry 1997
Júlia M. C. S. Magalhães Adélio A. S. C. Machado

This paper describes an automatic system which measures the effect of temperature variations on the response of ion-selective electrodes (hysteresis curves). The system is managed by a computer program which plots hysteresis curves following a pre-established temperature cycle, from setting and controlling the temperature of the water-bath, to acquiring the response potentials of up to five ele...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2012
Rajeev Kapri

We study by using Monte Carlo simulations the hysteresis in unzipping and rezipping of a double stranded DNA (dsDNA) by pulling its strands in opposite directions in the fixed force ensemble. The force is increased at a constant rate from an initial value g(0) to some maximum value g(m) that lies above the phase boundary and then decreased back again to g(0). We observed hysteresis during a com...

Journal: :Indian Journal of Science and Technology 2015

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1389

بارش، رواناب و رسوب از مهمترین پارامترهای هیدرولوژیکی می باشند و از آنجایی که تخمین پارامترهایی مانند رواناب و رسوب در طراحی، ساخت و نگهداری سازه های هیدرولیکی بسیار حائز اهمیت می باشد، بررسی و شناخت صحیح مراحل ایجاد و انتقال آنها نیز لازم و ضروری به نظر میرسد. این تحقیق بر عدم توانایی روش های ساده ای مانند منحنی های سنجه متداول، برای تخمین صحیح و عدم کارایی آنها برای تفسیر دقیق تغییرات پارامتر...

1997
Dejan Djukic Bertrand Dutoit

An identiication method for Preisach-type models of hysteresis is presented. By using a phenomenological Preisach-type model for hysteresis we can obtain an exact model for the magnetisation hysteresis in the cases of tapes with strip and with elliptical cross section geometries. With a parametrisation by Maclaurin series, it is possible to identify such a model for any other geometry. An addit...

2009
Emilio Congregado Antonio A. Golpe Simon Parker

The Dynamics of Entrepreneurship: Hysteresis, Business Cycles and Government Policy This paper estimates an unobserved components model to explore the macro dynamics of entrepreneurship in Spain and the US. We ask whether entrepreneurship exhibits hysteresis, defined as a macro dynamic structure in which cyclical fluctuations have persistent effects on the natural rate of entrepreneurship. We f...

Journal: :Spine 2001
M Solomonow E Eversull B He Zhou R V Baratta M P Zhu

STUDY DESIGN The reflexive EMG from the L3-L4 to L5-L6 multifidus of the in vivo feline was recorded during application of single passive flexion-extension cycle of the lumbar spine. OBJECTIVE To determine the effect of viscoelastic hysteresis associated with a single-cycle flexion-extension and of increasing cycle frequency on the initiation and cessation displacement and tension thresholds ...

2004
Amitabh Joshi Wenge Yang Min Xiao

We have experimentally observed a “backward” (clockwise rotating) hysteresis cycle in the system of an optical ring cavity containing three-level (L-type configuration) rubidium atoms. The shape and direction of the observed hysteresis cycles can be easily controlled with experimental parameters. Such an interesting phenomenon is caused by the greatly modified absorption, dispersion, and nonlin...

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