Power Electronics and Variable Frequency Drives

Power Electronics and Variable Frequency Drives

نام کامل کتاب:Power Electronics and Variable Frequency Drives Technology and Applications نویسنده:Bimal K. Bose ناشر:IEEE تاریخ انتشار:1996 ...

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ترجمه مقاله Investigation of the cutoff frequency of double linear halo lightly doped drain and source CNTFET

ترجمه مقاله Investigation of the cutoff frequency of double linear halo lightly doped drain and source CNTFET

After discovering the carbon nanotube (CNT) by Aijima, scientific research about this structure are expanded due to its excellent electronic properties. One of the important properties of this structure is quasi-ballistic transport with very high carrier mobility. Using carbon nanotube, two types of field effect transistors have been discussed. The first type is Schottky barrier carbon nanotube field effect transistor (SB-CNTFET) and second type is MOSFET-like CNTFETs (MOSCNTs). The ...

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Adaptive magnitude spectrum algorithm for Hilbert–Huang transform based frequency identification

Adaptive magnitude spectrum algorithm for Hilbert–Huang transform based frequency identification

An innovative Hilbert ndash;Huang transform (HHT) based frequency identification approach designated as adaptive magnitude spectrum algorithm(AMSA) is proposed in this paper. Characterized by the a posteriori property, the AMSA does not need the a priori information about the modalfrequencies to be identified, and the situations that a modal frequency may be contained along specific segments of the whole time duration ofone or more intrinsic mode functions (IMFs) are allowed for automatically ...

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FREQUENCY AND DAMPING EVOLUTION DURING EXPERIMENTAL SEISMIC RESPONSE OF CIVIL ENGINEERING STRUCTURES

FREQUENCY AND DAMPING EVOLUTION DURING EXPERIMENTAL SEISMIC RESPONSE OF CIVIL ENGINEERING STRUCTURES

The results of the seismic tests on several reinforced-concrete shear walls and a four-storey frame are analysed in this paper. Each specimen was submitted to the action of a horizontal accelerogram, with successive growing amplitudes, using the pseudodynamic method. An analysis of the results allows knowing the evolution of the eigen frequency and damping ratio during the earthquakes thanks to an identification method working in the time domain. The method is formulated as a spatial model in ...

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Radio Frequency Identification

Radio Frequency Identification

عنوان تحقیق:Radio Frequency Identification قالب بندی: WORD تعداد صفحات: 32 قسمتی از متن: از طریق زیر ساخت اینترنت می توان به منابع بسیار متنوع و گسترده ای از اطلاعات دسترسی داشت. اما اینکه چگونه اطلاعات را جمع آوری و ثبت نماییم، همچنان یک معضل بزرگ است. در بسیاری از موارد، اطلاعات به صورت ...

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Nonlinear frequency analysis of nanotubes with surface effects

Nonlinear frequency analysis of nanotubes with surface effects

In the current work we obtained exact solution for nonlinear free vibration of nanotubes (NTs) with surface effects incorporated to Euler-Bernoulli beam theory and von Karman geometric nonlinearity. We used Jacobi elliptic functions to obtain the nonlinear natural frequencies. Normalized nonlinear natural frequencies and the phase trajectory were studied with the presence of surface effects. This study might be helpful to design NT-based devices in a wide range of applications. ...

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