نتایج جستجو برای: systems analysis

تعداد نتایج: 3758357  

As a response to a growing interest in RFID systems such as Internet of Things technology along with satisfying the security of these networks, proposing secure authentication protocols are indispensable part of the system design. Hence, authentication protocols to increase security and privacy in RFID applications have gained much attention in the literature. In this study, security and privac...

Journal: :پژوهش ادبیات معاصر جهان 0
سیدآیت حسینی دانشگاه تهران محمود بی جن خان دانشگاه تهران رضا مقدم کیا دانشگاه تهران

this research was conducted to reveal the differences between the intonation systems of persian and japanese languages and to be applied to the contrastive linguistics and language teaching fields. first,a description of the intonation system in the autosegmental-metrical phonology framework was chosen as reference for each language. based on these two descriptions, the intonations of the two l...

Journal: :international journal of advanced biological and biomedical research 2014
a.r. dehghanpour a.h. halabian m. fallahpour

dust is a common atmospheric phenomenon in iran especially in central arid regions.  this severely affects environment as well as resident’s health. among the results of this phenomenon are respiratory diseases, bash radiation, accelerated soil erosion, desertification and degradation of ecosystems. some dusts are originated from local desert conditions but adjacency to neighboring countries de...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده برق و کامپیوتر 1391

در این پایان نامه، کنترل نرو-فازی در پرنده هدایت پذیر از دور (پهپاد) استفاده شده است ابتدا در روش پیشنهادی اول، کنترل کننده نرو-فازی توسط مجموعه اطلاعات یک کنترل کننده pid به صورت off-line آموزش دیده است و در روش دوم یک کنترل کننده نرو-فازی on-line مبتنی بر شناسایی سیستم توسط شبکه عصبی rbf پیشنهاد شده است. سپس کاربرد این کنترل کننده در پهپاد بررسی شده است و مقایسه ای ما بین کنترل کننده های معمو...

Journal: :iranian journal of fuzzy systems 2005
amir abolfazl suratgar syed kamaledin nikravesh

this paper presents the basic concepts of stability in fuzzy linguistic models. theauthors have proposed a criterion for bibo stability analysis of fuzzy linguistic modelsassociated to linear time invariant systems [25]-[28]. this paper presents the basic concepts ofstability in the general nonlinear and linear systems. this stability analysis method is verifiedusing a benchmark system analysis.

Journal: :iranian journal of mechanical engineering transactions of the isme 0
ali ghorbanpour arani faculty of mechanical engineering, university of kashan, kashan, iran. hossein vossough faculty of mechanical engineering, university of kashan, kashan, iran reza kolahchi faculty of mechanical engineering, university of kashan, kashan, iran

the aim of the paper is to analyze electro-thermo nonlinear vibration of a double-piezoelectric composite microplate-system (dpcmps) based on nonlocal piezoelasticity theory. the two microplates are assumed to be connected by an enclosing elastic medium which is simulated by pasternak foundation. both of smart composite microplates are made of poly-vinylidene fluoride (pvdf) reinforced by zigza...

Journal: :journal of electrical and computer engineering innovations 2015
mohammad bagher noori shirazi ali golestani hamed ahmadian yazdi amir habibi daronkola

the destructive impact of fading environments and also bandwidth limitations are two main challenges which communication is dealing with them. these challenges can affect on the growth of wireless communication and even cause reliable communications and high data rate to be prevented. thus, ofdm (orthogonal frequency division multiplexing) modulation by using of fast calculation hardwares such ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1387

چکیده ندارد.

Journal: :journal of mahani mathematical research center 0
ali bayati eshkaftaki department of applied mathematics‎, ‎shahrekord‎ ‎university‎, ‎p‎. ‎o‎. ‎box 115‎, ‎shahrekord‎, ‎iran. javad alidousti department of applied mathematics‎, ‎shahrekord‎ ‎university‎, ‎p‎. ‎o‎. ‎box 115‎, ‎shahrekord‎, ‎iran. reza khoshsiar ghaziani department of applied mathematics‎, ‎shahrekord‎ ‎university‎, ‎p‎. ‎o‎. ‎box 115‎, ‎shahrekord‎, ‎iran.

‎in this paper‎, ‎we study stability of fractional-order nonlinear dynamic systems by means of lyapunov‎ ‎method‎. ‎to examine the obtained results‎, ‎we employe the developed techniques on test examples‎.

Journal: :international journal of advanced structural engineering 2009
li shuang zhai changhai xie lili

near-fault ground motions with long-period pulses can place severe demands on structures near an active fault. these pulse-type ground motions can be represented by pulse sequences with simple shapes. half-sinusoidal pulse sequences are used to approximate recorded ground motions and dynamic responses of sdof system under the excitation of these pulse sequences are studied. four cases are consi...

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