نتایج جستجو برای: Dynamic stability

تعداد نتایج: 688430  

Journal: :iranian journal of science and technology transactions of mechanical engineering 2015
r. ansari r. gholami

a nonlocal beam model based on the bernoulli–euler beam theory is presented to investigate the dynamic stability of embedded single-walled carbon nanotubes (swcnts) in thermal environment under combined static and periodic axial loads. the dynamic stability analysis is carried out by including the effects of small-scale parameter, temperature change and elastic medium. the equation of motion is...

باغبان, معصومه, ساکی, فرزانه,

Objective: Balancing is the most basic function of the neuromuscular system in performing all simple and complex activities that contribute to health-related physical fitness. Core stability may be a contributing factor to static and dynamic balance. The aim of this study was to investigate the relationship between core stability muscle endurance and static and dynamic balance in basketball pla...

Journal: :journal of rehabilitation sciences and research 0
mohammad hassan azarsa tehran university of medical sciences, teharan, iran azadeh shadmehr tehran university of medical sciences, teharan, iran shohreh jalaei tehran university of medical sciences, teharan, iran

background and objectives: scapular stabilization and neuromuscular control provide an important parameter to characterize shoulder function during dynamic activities. many studies have confirmed the effect of the loading on scapular position and scapulohumeral rhythm. therefore, the evaluation of stabilizer muscles involvement in scapular asymmetry may assist in the development of clinical exa...

Journal: :مهندسی برق و الکترونیک ایران 0
f. karbalaei s. abasi a. abedinzade m. kaviani

in methods presented to calculate the voltage collapse point, the transmission system is usually the only part of the power system that is completely modeled. distribution systems are often replaced by aggregate load models because the use of the detailed model of distribution systems in voltage stability analysis not only increases the computation time, but also decreases the probability of co...

Journal: :asian journal of sports medicine 0
elahe faraji department of sport medicine and corrective exercise, ferdowsi university of mashhad, mashhad, iran; department of sport medicine and corrective exercise, ferdowsi university of mashhad, mashhad, iran. hassan daneshmandi department of sport medicine and corrective exercise, university of guilan, rasht, iran ahmad ebrahimi atri department of sport medicine and corrective exercise, ferdowsi university of mashhad, mashhad, iran vahid onvani azad university, mashhad branch, mashhad, iran faride rezaee namjoo department of sport medicine and corrective exercise, ferdowsi university of mashhad, mashhad, iran

purpose ankle sprain is one of the most common injuries among athletes and instability and injury to this joint is responsible for long time loss of physical and recreational activity. also, it can impose high costs to sport teams. prevention of this injury is an important concern of practice and rehabilitation. one way of reducing the possibility of ankle joint injury is using an ankle orthosi...

Journal: :iranian journal of fuzzy systems 2012
arya aghili ashtiani sayyed kamaloddin yadavar nikravesh

this paper investigates the stability analysis of fuzzy relational dynamic systems. a new approach is introduced and a set of sufficient conditions is derived which sustains the unique globally asymptotically stable equilibrium point in a first-order fuzzy relational dynamic system with sumproduct fuzzy composition. this approach is also investigated for other types of fuzzy relational composit...

Journal: :international journal of advanced design and manufacturing technology 0
davoud naderi soheil ganjefar mohamad mosadeghzad

in this research optimal reconfiguration strategy of the improved srr reconfigurable mobile robot based on force-angle stability measure has been designed using genetic algorithm. path tracking nonlinear controller which keeps robot’s maximum stability has been designed and simulated in matlab. motion equations of the robot have been derived in parametric form by means of newton- euler, lagrang...

ژورنال: Physical Treatments 2020

Purpose: The growing popularity of media devices such as smartphones and computers has made humankind to acquire forward head posture increasingly. This study aimed to compare static and dynamic postural stability between people with and without forward head posture. Methods: 15 male students with normal posture (24±4 years, 173±6 cm and 70±6 kg) and 15 male students with forward head posture ...

Azadi, Jafari, Samadian,

The directional response and roll stability characteristics of a partly filled tractor semi-trailer vehicle, with cylindrical tank, are investigated in various maneuvers. The dynamic interaction of liquid cargo with the tractor semi-trailer vehicle is also evaluated by integrating a dynamic slosh model of the partly filled tank with five-degrees-of-freedom of a tractor semi-trailer tank mode...

باقری, منصور, کشته گر, بهروز,

In this paper, a new method is proposed for fuzzy structural reliability analysis; it considers epistemic uncertainty arising from the statistical ambiguity of random variables. The proposed method, namely, fuzzy dynamic-directional stability transformation method, includes two iterative loops. An internal algorithm performs the reliability analysis using the dynamic-directional stability trans...

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