نتایج جستجو برای: intensity noise

تعداد نتایج: 368216  

2001
Kazuyuki FUJII Daisuke HAYASHI Osamu INOMOTO Shoichi KAI

The entrainment dynamics of two chemical-oscillators in an excitable medium separated by some distance d was experimentally studied in the light-sensitive BelousovZhabotinsky reaction under application of external noise. Two chemical-oscillators were always spontaneously synchronized at sufficiently small d or frequency difference in the absence of noise. For insufficient distance to entrain ea...

دهقان, حبیب اله, غریب, سیف اله,

Introduction: In some jobs, physical activity can be done in high noise pollution that can affect the heart rate. The aim of this study was to investigate the effects of noise exposure and physical activity on heart rate in the hot and humid conditions. Materials and Methods:  This experimental study was performed on 14 healthy men in hot and humid climatic chamber (35 °C, 75% RH). ...

Journal: :Optics letters 2011
A Cingöz D C Yost T K Allison A Ruehl M E Fermann I Hartl J Ye

We report a simple technique to suppress high-frequency phase noise of a Yb-based fiber optical frequency comb using an active intensity noise servo. Out-of-loop measurements of the phase noise using an optical heterodyne beat with a cw laser show suppression of phase noise by ≥7 dB out to Fourier frequencies of 100 kHz with a unity-gain crossing of ∼700 kHz. These results are enabled by the st...

Journal: :international journal of occupational hygiene 0
seyedehzahra jalilzadeh islamic republic of iran broadcasting university, tehran, iran. mohammad asgari islamic republic of iran broadcasting university, tehran, iran. mohammadebrahim sadeghi islamic republic of iran broadcasting university, tehran, iran.

acoustic experimental data of irib (islamic republic of iran broadcasting) server room was taken to measure the acoustic noise characteristics of frequency and sound pressure level (spl). the purposes of this paper are measuring the noise pollution and its evaluation through the regulations. the measurements were taken in two stages. the first one was taken at 10 points by sound investigator 22...

حسنی, زهرا, شغلی, علیرضا, فهرستی, محمد, مطلبی, سکینه, مهرام, منوچهر, نیکنام, مهیندخت,

Background: Noise as a harmful physical agent for factory workers is one of the most important causes of neurosensory hearing loss. In this study, workers of noise-polluted factories were assessed by audiometric equipment to determine their frequency and intensity of hearing loss (HL). Materials and Methods: In this descriptive study 2004 workers from five factories in Zanjan and suburbs (inclu...

Journal: :The Journal of the Acoustical Society of America 1979

Journal: :journal of electrical and computer engineering innovations 2014
mohammad r. pishgoo mohammad r. n. avanaki reza ebrahimpour

optical coherence tomography (oct) uses the spatial and temporal coherence properties of optical waves backscattered from a tissue sample to form an image. an inherent characteristic of coherent imaging is the presence of speckle noise. in this study we use a new ensemble framework which is a combination of several multi-layer perceptron (mlp) neural networks to denoise oct images. the noise is...

Journal: :The Journal of the Acoustical Society of America 1984

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