نتایج جستجو برای: Multi-Step beam

تعداد نتایج: 816594  

An efficient resource allocation is important to guarantee the best performance with a fair distribution of multi-beam satellite capacity to provide satellite multimedia and broadcasting services. In this way, available bandwidth and capacity problems in new satellite system likes Multi-Input-Multi-Output (MIMO), exploring new techniques for enhancing spectral efficiency in satellite communicat...

The main objective of this study is to reduce optimal vibration suppression of Timoshenko beam under non-periodic step and impulse inputs. Cantilever beam was modeled by Timoshenko theory and finite element numerical method. Stiffness (K), mass (M), and damping (C) matrices are extracted. Then, in order to control structure vibration, piezoelectric patches were used due to simultaneous dual beh...

1998
F. W. Hersman M. Holtrop W. Kim K. Park

Indicate any experiments that have physics goals similar to those in your proposal. We propose a measurement of the polarized electron beam asymmetry (the fifth response function, R LT ') in exclusive reactions on the nuclei of 3 He, 4 He and 12 C. The CLAS detector is an ideal instrument for survey measurements of these asymmetries because of its extensive out of plane capabilities and full an...

Journal: :journal of computer and robotics 0
mohammad talebi motlagh department of systems and control, industrial control center of excellence, k.n.toosi university of technology, tehran, iran hamid khaloozadeh department of systems and control, industrial control center of excellence, k.n.toosi university of technology, tehran, iran

modelling and forecasting stock market is a challenging task for economists and engineers since it has a dynamic structure and nonlinear characteristic. this nonlinearity affects the efficiency of the price characteristics. using an artificial neural network (ann) is a proper way to model this nonlinearity and it has been used successfully in one-step-ahead and multi-step-ahead prediction of di...

H Afshari H Najafi K Torabi,

In this paper, vibration analysis of multiple-stepped Bernoulli-Euler and Timoshenko beams carrying point masses is presented analytically for various boundary conditions. Each attached element is considered to have both translational and rotational inertias. The method of solution is “transfer matrix method” which is based on the changes in the vibration modes at the vicinity of any discontinu...

Journal: :journal of solid mechanics 0
a amiri mechanical engineering department, urmia university, urmia, iran g rezazadeh mechanical engineering department, urmia university, urmia, iran r shabani mechanical engineering department, urmia university, urmia, iran a khanchehgardan mechanical engineering department, urmia university, urmia, iran

in this paper, the stability of a functionally graded magneto-electro-elastic (fg-mee) micro-beam under actuation of electrostatic pressure is studied. for this purpose euler-bernoulli beam theory and constitutive relations for magneto-electro-elastic (mee) materials have been used. we have supposed that material properties vary exponentially along the thickness direction of the micro-beam. gov...

2015
Hamed Dehghan BANADAKI Hasan Abbasi NOZARI Mahdi Aliyari SHOOREHDELI

The walking beam furnace is one of the most prominent process plants often met in an alloy steel production factory and characterised by high non-linearity, strong coupling, time delay, large time-constant and time variation in its parameter set and structure. From another viewpoint, the walking beam furnace is a distributed-parameter process in which the distribution of temperature is not unif...

Journal: :Optics express 2006
Satoru Shoji Remo Zaccaria Hong-Bo Sun Satoshi Kawata

We present laser interference patterning of three-dimensional photonic lattice structures with three-step three-beam irradiation. In contrast to one-step four-beam interference patterning, the proposed method makes it possible to continuously tune the lattice constant and the photonic band gap without distortion of the lattice shape. We analytically show that all fourteen Bravais lattices are p...

Journal: :asia oceania journal of nuclear medicine and biology 0
hideo onishi program in health and welfare, graduate school of comprehensive scientific research, prefectural university of hiroshima norikazu matsutomo department of radiology, kurashiki central hospital yoshiharu kangai program in biological system sciences, graduate on school of comprehensive scientific research, prefectural university of hiroshima tatsunori saho program in health and welfare, graduate school of comprehensive scientific research, prefectural university of hiroshima hizuru amijima department of nursing,hyogo university of health sciences

objective(s): a novel iq-specttm method has become widely used in clinical studies. the present study compares the quality of myocardial perfusion images (mpi) acquired using the iq-specttm (iq-mode),conventional (180° apart: c-mode) and l-mode (90° apart: l-mode) systems. we assessed spatial resolution, image reproducibility and quantifiability using various physical phantoms. materials and me...

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