in this paper, a structural damage identification method (sdim) is developed for plate-like structures. this method is derived using dynamic equation of undamaged/damaged plate, in which local change in flexural rigidity is characterized utilizing a damage distribution function. the sdim requires to modal data in the intact state and frequency response of damage state where most of vibration ba...

Planar accelerating structures, so called muffin tins, are of great interest for new accelerating techniques which are operating at high frequencies. At present the upper frequency limit for high power sources is 29.9855 GHz available at CERN. Therefore a new design of a planar traveling wave constant impedance accelerating structure is presented. A fully engineered 37-cell prototype with an op...

Single crystal nanobelts of ZnO were synthesized and deposited onto 36° YX LiTaO3 and 64° YX LiNbO3 Surface Acoustic Wave (SAW) devices for gas sensing applications. Sensor response, defined as the change in resonant frequency, was measured for H2 and NO2 between 20 and 200°C. Measured sensor responses were 3.5 kHz towards 10 ppm NO2 for a 64° LiNbO3 SAW transducer operating at 160°C and 3 kHz ...

objective: in electrochemotherapy (ect), there is an unpleasant sensation of muscle contraction when using a low frequency (1 hz). therefore, by increasing the pulse frequency above the tetanic frequency this painful sensation can be reduced. the aim of the present study is to compare the treatment efficiencies of low and high frequency ect, and estimate the effect of its repeated sessions. mat...

Pulse width modulation (PWM) has been widely used in power converter control. Most high power level converters operate at switching frequencies up to 500 kHz, while operating frequencies in excess of 1 MHz at high power levels can be achieved using the planar transformer technology. The contribution of this paper is the development of a high-frequency PWM generator architecture for power conver...

This paper investigates an alternative mass sensing technique based on nonlinear micro/nanoelectromechanical resonant sensors. The proposed approach takes advantage of multi-stability and bifurcations of the hysteretic frequency responses of the electrostatically-actuated resonator. For this purpose, a reduced-order model is considered. Numerical results show that sudden jumps in amplitude make...