نتایج جستجو برای: Displacement control

تعداد نتایج: 1378088  

Journal: :computational methods in civil engineering 2012
a. varasteh f. behnamfar m. salimi

an enhanced displacement feedback structural control procedure is presented for performance-based design in this paper. at first, a comparative study is implemented assessing three most common active control algorithms including state, acceleration, and displacement feedback controls. the advantage of the displacement feedback algorithm for active control of structures against earthquakes is de...

Journal: :Transactions of the Society of Instrument and Control Engineers 1982

Journal: :journal of rehabilitation sciences and research 0
seyed ali hosseini university of social welfare and rehabilitation sciences, tehran, iran bahareh zeynalzadeh ghoochani university of social welfare and rehabilitation sciences, tehran, iran saeed talebian department of physiotherapy faculty of rehabilitation sciences tehran university of medical sciences and health services, tehran , iran ebrahim pishyare university of social welfare and rehabilitation sciences, tehran, iran hojjat allah haghgoo university of social welfare and rehabilitation sciences, tehran, iran roya mahmoodi meymand university of social welfare and rehabilitation sciences, tehran, iran

background: centre of pressure displacement is an indicator of postural control. children with cerebral palsy have poor postural control. one common intervention to enhance their balance is vestibular stimulation. the aim of this research was to investigate the effect of vestibular stimulation on cop parameters in children with cerebral palsy (3-10 years old). methods: this study was a randomiz...

A. Varasteh F. Behnamfar, M. Salimi

An enhanced displacement feedback structural control procedure is presented for performance-based design in this paper. At first, a comparative study is implemented assessing three most common active control algorithms including state, acceleration, and displacement feedback controls. The advantage of the displacement feedback algorithm for active control of structures against earthquakes is de...

Journal: :mechanics of advanced composite structures‎ 2014
mahmood mehrdad shokrieh masood esmkhani amir reza haghighatkhah

in the present study, the effect of various weight fractions of graphene nanoplatelet (gpl) on flexural fatigue behavior of epoxy polymer has been investigated at room temperature and generally the temperature was monitored on the surface of specimen during each test. the flexural stiffness of grapheme nano-platelet/epoxy nanocomposites at 0.1, 0.25 and 0.5 wt. % as a main effective parameter o...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده فنی 1391

در این پژوهش قصد بر آن بوده است که با توجه به فلسفه جذب انرژی زلزله در المان های تعمیرپذیر یا قابل تعویض (فیوز) انرژی وارد شده به سازه به مناطق تعمیر پذیر هدایت شود. المان پیشنهادی به صورت ستون هایی در طبقه اول ساختمان که دو انتهای آنها قطعات دمبلی شکل و المان واسط دو قطعه با المان wire تعریف شده است. در مرحله اول این ستون ها در نرم افزار abaqus مدل سازی شده و منحنی رفتار هیسترتیک آنها تحت اثر ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده مهندسی عمران 1383

سازه های عمرانی در طول عمر مفید خود در برابر بارهای محیطی دینامیکی مثل باد و زلزله قرار می گیرند که باید در برابر آنها مقاومت نمایند. پیشرفت علم و بوجود آمدن سیستم های کنترلی باعث گسترش این سیستم ها در حیطه ساختمان گردیده است. سیستم ها و روش های مختلفی در زمینه کنترل در ساختمانها ارایه شده است که بسیاری از آنها در مرحله تحقیق و بررسی و تعدادی از آنها بصورت عملی در ساختمانها اجرا شده است. در این...

Journal: :TRANSACTIONS OF THE JAPAN FLUID POWER SYSTEM SOCIETY 2014

Journal: :civil engineering infrastructures journal 0
hessamoddin meshkat razavi ph.d. candidate, department of civil engineering, faculty of engineering, ferdowsi university of mashhad, mashhad, iran hashem shariatmadar associated professor, department of civil engineering, faculty of engineering, ferdowsi university of mashhad, mashhad, iran

this study is investigated the optimum parameters for a tuned mass damper (tmd) under the seismic excitation. shuffled complex evolution (sce) is a meta-heuristic optimization method which is used to find the optimum damping and tuning frequency ratio for a tmd. the efficiency of the tmd is evaluated by decreasing the structural displacement dynamic magnification factor (ddmf) and acceleration ...

Journal: :journal of dental materials and techniques 0
mahrokh mahrokh imanimoghaddam oral and maxillofacial diseases research center, department of oral and maxillofacial radiology, faculty of dentistry, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) azam sadat azam sadat madani department of prosthodontics, faculty of dentistry and dental research center, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) elahe elahe mahmoudi hashemi department of oral and maxillofacial radiology, faculty of dentistry, north khorasan university of medical sciences, bojnurd, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی خراسان شمالی (khorasan shomali university of medical sciences)

introduction: it has been shown that joint click, an initial and common finding in internal derangement (id), respond to neither conservative treatment nor surgical intervention. this raises the question as to whether it must be treated in the absence of other pertinent signs and symptoms, so the aim of this study was to investigate and compare the mri findings of tmj in both normal subjects an...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید