نتایج جستجو برای: intensity noise

تعداد نتایج: 368216  

Abolghasem Jouyban, Jafar Soleymani Jalil Vaez-Gharamaleki Jamshid L. Manzoori Masoomeh Shaghaghi

A new sensitive, simple and rapid method for determination of methotrexate (MTX) was developed based on quenching effects of MTX on the fluorescence intensity of Tb3+-1,10-phenanthroline complex. The fluorescence intensity was measured with excitation wavelength of 300 nm and emission wavelength of 545 nm and the quenched fluorescence intensity is proportional to the concentration of MTX in Tris...

2012
Wesley T. Kerr Edward P. Lau

The technology of fluoro-deoxyglucose positron emission tomography (PET) has drastically increased our ability to visualize the metabolic process of numerous neurological diseases. The relationship between the methodological noise sources inherent to PET technology and the resulting noise in the reconstructed image is complex. In this study, we use Monte Carlo simulations to examine the effect ...

Journal: :Vision Research 2015
Florian Röhrbein Peter Goddard Michael Schneider Georgina James Kun Guo

A central research question in natural vision is how to allocate fixation to extract informative cues for scene perception. With high quality images, psychological and computational studies have made significant progress to understand and predict human gaze allocation in scene exploration. However, it is unclear whether these findings can be generalised to degraded naturalistic visual inputs. I...

Journal: :iranian journal of pharmaceutical research 0
abolghasem jouyban pharmaceutical analysis laboratory, drug applied research center, tabriz university of medical sciences, tabriz, iran. masoomeh shaghaghi department of analytical chemistry, faculty of chemistry, university of tabriz, tabriz, iran. jamshid l. manzoori department of analytical chemistry, faculty of chemistry, university of tabriz, tabriz, iran. jafar soleymani kimia research institute, tabriz, iran. jalil vaez-gharamaleki hematology-oncology research center, tabriz university of medical sciences, tabriz, iran.

a new sensitive, simple and rapid method for determination of methotrexate (mtx) was developed based on quenching effects of mtx on the fluorescence intensity of tb3+-1,10-phenanthroline complex. the fluorescence intensity was measured with excitation wavelength of 300 nm and emission wavelength of 545 nm and the quenched fluorescence intensity is proportional to the concentration of mtx in tris...

1999
T. Kanamaru

Stochastic Resonance in a coupled FitzHugh-Nagumo equation is investigated. The optimal noise intensity and the optimal input frequency, which maximize the signal to noise ratio of the output signal, are studied numerically, and their dependence on system parameters and connection coe cients is examined. It is found that a network composed of six elements can separate a superimposed periodic pu...

Journal: :pollution 2016
anirban kundu chowdhury anupam debsarkar shibnath chakrabarty

a four year long research programme divided into four phases has been designed for the first time to assess the combined noise-air quality and combined exposure to noise-air pollution at the curbside open-air microenvironment of kolkata city, india. the results and the findings of the different phases of study had already been published. the objective of the review work is to fuse the findings ...

Journal: :Journal of microscopy 2011
Katarzyna M Kedziora Johen H M Prehn Jurek Dobrucki Tytus Bernas

Confocal microscopy is based on measurement of intensity of fluorescence originating from a limited volume in the imaged specimen. The intensity is quantized in absolute (albeit arbitrary) units, producing a digital 3D micrograph. Thus, one may obtain quantitative information on local concentration of biomolecules in cells and tissues. This approach requires estimation of precision of light mea...

A. Bahoddini G.A. Dehghani M. Monsefi, S. Nazemi

Background: Noise pollution is considered as a stressful factor in every day’s life of the industrial world. The present study was designed to investigate the probable effects of different time exposure of noise stress on histomorphometric changes of adrenal gland, plasma cortisol and body weight of the rat. Methods: Sixty adult male Wistar rats were divided into two series of short time noise ...

2004
V. V. SHERSTNEV

We demonstrate that external noise can play a constructive role in a laser diode, inducing coherent mid-infrared radiation. Depending on noise intensity, the induced lasing can be either unimode or mulitimode. The coherence of the radiation in each mode reaches its maximum at an optimal noise intensity that differs depending on the mode. The phenomenon can therefore be classified as a multiple ...

2008
Zhihui Yang Jinqiao Duan

A dynamical system driven by non-Gaussian Lévy noises of small intensity is considered. The first exit time of solution orbits from a bounded neighborhood of an attracting equilibrium state is estimated. For a class of non-Gaussian Lévy noises, it is shown that the mean exit time is asymptotically faster than exponential (the well-known Gaussian Brownian noise case) but slower than polynomial (...

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