نتایج جستجو برای: electromechanical coupling

تعداد نتایج: 158360  

Journal: :Biomechanics and Modeling in Mechanobiology 2018

2008
Joachim DÖRING Viktor BOVTUN Jürgen Bartusch Uwe Beck

Electromechanical properties of the cellular polypropylene ferroelectret films (EMFIT) evidence their high potential for the air-coupled ultrasonic applications. The disadvantage with respect to their low coupling factor could be compensated by the extremely low acoustic impedance. A figure of merit is proposed to compare and estimate piezoelectric materials intended for the air-coupled ultraso...

Journal: :Ultrasonics 2003
Wenhua Jiang Rui Zhang Bei Jiang Wenwu Cao

The relaxor based ferroelectric (1-x)Pb(Zn(1/3)Nb(2/3))O(3)-xPbTiO(3) and (1-x)Pb(Mg(1/3)Nb(2/3))O(3)-xPbTiO(3) single crystals provided new challenges in property characterization because their extraordinarily large piezoelectric coefficients and electromechanical coupling coefficients. Large errors may occur in some of the derived material constants using conventional characterization techniq...

Journal: :Nanotechnology 2007
Sergei V Kalinin Brian J Rodriguez Stephen Jesse Katyayani Seal Roger Proksch Sophia Hohlbauch Irene Revenko Gary Lee Thompson Alexey A Vertegel

Electromechanical coupling is ubiquitous in biological systems, with examples ranging from simple piezoelectricity in calcified and connective tissues to voltage-gated ion channels, energy storage in mitochondria, and electromechanical activity in cardiac myocytes and outer hair cell stereocilia. Piezoresponse force microscopy (PFM) originally emerged as a technique to study electromechanical p...

2005
Siavash Pourkamali Farrokh Ayazi

This paper, the second of two parts, introduces electrostatic coupling of micromechanical resonators for implementation of high-order narrow-bandwidth bandpass filters. The concept of electrostatic coupling of closely spaced microresonators and its electromechanical modeling is presented. Electrostatic coupling of resonators does not require any distinct physical coupling elements. The electros...

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