نتایج جستجو برای: electric excitation

تعداد نتایج: 203223  

2014
Wen-Hua Cui Bin Li Xue-Jing Li Song Gao

Electrodes of electromagnetic flow-meter are subject to contamination in sewage measurement. In this paper, the relationship between the internal resistance of the flow-induced voltage and the electrode contamination is analyzed on the basis of numerical analysis. A new self-diagnostic method for electrode adhesion with additional excitation based on photovoltaic cell is proposed, in which magn...

2005
S. Typel G. Baur

Electromagnetic strength functions of single-particle halo nuclei exhibit universal features that can be described in terms of characteristic scale parameters [1, 2]. These exotic nuclei are often well described assuming a simple nucleon+core structure. They have been studied extensively in recent years by electromagnetic excitation with the help of the Coulomb breakup method. A large electroma...

Journal: :Nanotechnology 2008
W S Su T T Chen C L Cheng S P Fu Y F Chen C L Hsiao L W Tu

Novel behaviors arising from the coupling between the built-in surface electric field, piezoelectricity, electron-hole pairs and external light beam were observed in GaN nanorods. An increase in the optical excitation density resulted in a blueshift in the photoluminescence spectra and a redshift in the frequency of the GaN A(1)(LO) phonon. The underlying mechanism was attributed to the screeni...

2005
Matthew Reid Igor V. Cravetchi Robert Fedosejevs

Polarized second-harmonic generation and terahertz radiation in reflection from 100 , 110 , and 111 faces of n-type InAs crystals are investigated as a function of the sample azimuthal orientation under excitation from femtosecond Ti:sapphire laser pulses. The expressions describing the second-order response optical secondharmonic generation and optical rectification in reflection from zinc-ble...

1998
Ji Wang

|For crystal resonators, it is always desirable to calculate the electric properties accurately for application purposes. As an extension of the Mindlin plate theory based nite element analysis of crystal resonators, a new theory for the electroded plates is derived and the piezoelectrically forced vibrations are formulated and implemented in this paper in a manner similar to our previous work....

Journal: :Nano letters 2015
Haidong Li Yuanhua Sang Sujie Chang Xin Huang Yan Zhang Rusen Yang Huaidong Jiang Hong Liu Zhong Lin Wang

An electric field built inside a crystal was proposed to enhance photoinduced carrier separation for improving photocatalytic property of semiconductor photocatalysts. However, a static built-in electric field can easily be saturated by the free carriers due to electrostatic screening, and the enhancement of photocatalysis, thus, is halted. To overcome this problem, here, we propose sonophotoca...

1999
F. Robicheaux C. Wesdorp L. D. Noordam

We present the results of experimental and theoretical investigations into the photoionization spectra of Ba Stark states at energies resonant with the 5d7d D2 perturber level starting from the 5d6p D1 o state. The electric field is strong enough to allow the electrons to classically escape the atom, thus transforming the perturber state into a resonance. Much of the dynamics of this remarkably...

Journal: :Journal of neurophysiology 2014
Weifeng Xu Brian S Wolff Jian-young Wu

Low-intensity alternating electric fields applied to the scalp are capable of modulating cortical activity and brain functions, but the underlying mechanisms remain largely unknown. Here, we report two distinct components of voltage-sensitive dye signals induced by low-intensity, alternating electric fields in rodent cortical slices: a "passive component," which corresponds to membrane potentia...

Journal: :Physical review letters 2017
R V Mikhaylovskiy T J Huisman R V Pisarev Th Rasing A V Kimel

We show that femtosecond laser pulse excitation of the orthoferrite ErFeO_{3} triggers pico- and subpicosecond dynamics of magnetic and electric dipoles associated with the low energy electronic states of the Er^{3+} ions. These dynamics are readily revealed by using polarization sensitive terahertz emission spectroscopy. It is shown that by changing the polarization of the femtosecond laser pu...

2014
Javier de Luis JAVIER DE LUIS

Distributed segmented piezo-electric actuators bonded to an elastic substructure and embedded inside a laminated composite material are modeled. Static mechanical models for various actuator geometries exciting both extension and flexure in the substructural material are developed. The flexural static models for both surface bonded and embedded cases are then integrated into a simple dynamic mo...

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