نتایج جستجو برای: microwave devices

تعداد نتایج: 248492  

2014

Future smart systems for communication and RF-sensing will have to achieve autonomous and self-reconfigurable operations, for real-time and efficient selfoptimization of their performance. The needs for such reconfigurable systems are not only to overcome the design tradeoffs that current analogue components must endure, but also to realize new and more efficient systems with improved functiona...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده ادبیات و زبانهای خارجی 1388

the present study was an attempt to conduct a contrastive analysis between general english (ge) and english for specific purposes (esp) texts in terms of cohesion and cohesive devices. to this end, thirty texts from different esp and ge textbooks were randomly selected. then they were analyzed manually to find the frequency of cohesive devices. cohesive devices include reference, substitution, ...

Journal: :Nanotechnology 2012
G Yang Y W Zhou Z R Guo Y Wan Q Ding T T Bai C L Wang N Gu

A new approach of utilizing microwave to pattern gradient concentric silver nanoparticle ring structures has been presented. The width and height of a single ring and the space between adjacent rings can be adjusted by changing the silver colloidal concentration and the microwave output power. By simply enhancing the ambient vapour pressure to the saturated value during microwave-assisted evapo...

2015
Changzhen Wang Xiaoyan Wang Hongmei Zhou Guofu Dong Xue Guan Lifeng Wang Xinping Xu Shuiming Wang Peng Chen Ruiyun Peng Xiangjun Hu

The increasing use of microwave devices over recent years has meant the bioeffects of microwave exposure have been widely investigated and reported. However the exact biological fate of bone marrow MSCs (BM-MSCs) after microwave radiation remains unknown. In this study, the potential cytotoxicity on MSC proliferation, apoptosis, cell cycle, and in vitro differentiation were assayed following 2....

2012
Joe Baylon Ethan Elenberg Samantha Massengill

1. Introduction A multitude of commercial devices transmit in the unlicensed 2.4 GHz ISM band, and these devices are likely to interfere with each other. These effects are compounded in highly populated metropolitan areas with large numbers of microwave ovens, Bluetooth devices, cord-less phones, wireless game controllers, and other devices which occupy the ISM band. This contributes to an ever...

2008
BEATRIZ COBO RAQUEL TORRES ANGEL MEDIAVILLA

The long term impact of microwave communication technologies will be functionality simulated and design on traditional computing and usual RF and microwave communication simulators such us: PSPICE, Agilent ADS, Agilent GENESYS, AWR Microwave Office, etc. This ability, allows making possible the enabling of the digital computer interaction and simulation with the designer and the world around it...

Journal: :Molecular Crystals and Liquid Crystals 2015

Journal: :The Journal of the Institute of Television Engineers of Japan 1974

1999
Wensheng Hu A. S. Thanawalla B. J. Feenstra F. C. Wellstood Steven M. Anlage

Nonlinearities give rise to intermodulation distortion in superconducting microwave devices and currently limit their use to low power applications. We have developed a cryogenic imaging technique to spatially resolve intermodulation distortion and used it to image an 8.2 GHz high temperature superconducting Tl2Ba2CaCu2O8 microwave resonator. The images reveal that the fundamental and intermodu...

2013
Ning-Ning Song Hai-Tao Yang Hao-Liang Liu Xiao Ren Hao-Feng Ding Xiang-Qun Zhang Zhao-Hua Cheng

Magnetic nanoparticles have attracted much research interest in the past decades due to their potential applications in microwave devices. Here, we adopted a novel technique to tune cut-off frequency exceeding the natural resonance frequency limit of monodisperse Fe3O4 nanoparticles via superparamagnetic relaxation. We observed that the cut-off frequency can be enhanced from 5.3 GHz for Fe3O4 t...

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