Results 211 to 220 of about 71,204 (254)
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Signal-to-noise ratio (SNR) as a measure of reproducibility: design, estimation, and application
Health Services and Outcomes Research Methodology, 2008This paper proposes the use of signal-to-noise ratio (SNR) as another index of a measurement’s reproducibility. We derive its maximum likelihood estimation and discuss confidence interval construction within the framework of the one-way random effect model.
N. Elkum, M. M. Shoukri
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Signal-To-Noise Ratio (SNR) For Reliable Data Recording
SPIE Proceedings, 1987Due to the nonlinear nature of the thermal optical recording process and the inherent difficulty in tracking and maintaining focus of a submicron-sized light spot, peak-shift values of 40 to 50% are likely to occur during the use of an optical data storage system.
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Evaluation of signal to noise ratio (SNR) of log periodic dipole antenna (LPDA)
2013 IEEE Business Engineering and Industrial Applications Colloquium (BEIAC), 2013Logarithmic periodic dipole antenna (LPDA) was constructed for monitoring Sun in the range of (45 -870) MHz to precisely match the solar monitoring requirements. In our work, we choose rod aluminium's type as a conductor with nineteenth (19) elements of different sizes.
Z.S. Hamidi, N.N.M. Shariff
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Series analysis of Signal to Noise Ratio (SNR) in active mode-locked lasers
2007 IFIP International Conference on Wireless and Optical Communications Networks, 2007Analysis of active mode-locked laser under the influence of asynchronous spontaneous emission (ASE) noise by using series approach is presented in this paper. Transient evolution and steady state of the mode-locked pulse are studied in details by the use of mathematical series approximating the generated pulse.
Huy Quoc Lam +4 more
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[Improving SNR (signal to noise ratio) in multichannel EEG recording].
Biomedizinische Technik. Biomedical engineering, 2003The main problem in measurements of the focal VEP (Visual Evoked Potential) is its weak SNR (Signal-to-Noise Ratio). The most common method for enhancement of the SNR is the stimulus synchronized averaging. For study of single responses other ways in SNR improvement are needed. In this contribution a new method based on space-time selective measurement
P, Husar +4 more
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Analytical model for the calculation of the optical signal-to- noise ratio (SNR) of WDM EDFA chains
Optical and Quantum Electronics, 1999A new, simplified analytical model for the calculation of the signal-to-noise ratio (SNR) in multiwavelength erbium-doped fibre amplifier (EDFA) cascades is presented. Comparisons with numerical results give excellent agreement, confirming the validity of this model and its significance for optimising system parameters.
R. Schober, P. Bayvel, F. Di Pasquale
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Enhancement of signal to noise ratio using bispectrum a quantitative analysis for very low SNR
2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2001Bispectrum has been widely used to enhance the SNR. This is based on the assumption that the HOS properties of the signal of interest are different to the HOS properties of. the noise. In the present work, we consider the use of bispectrum techniques when repeated measurements are made of a deterministic signal embedded in random noise where SNR is in ...
P. Yeganeh, M.H. Moradi, A. Reshad
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Calculation of signal-to-noise ratio (SNR) of infrared detection system based on MODTRAN model
SPIE Proceedings, 2013Signal-to-noise ratio (SNR) is an important parameter of infrared detection system. SNR of infrared detection system is determined by the target infrared radiation, atmospheric transmittance, background infrared radiation and the detector noise. The infrared radiation flux in the atmosphere is determined by the selective absorption of the gas molecules,
Xue Lu, Chuang Li, Xuewu Fan
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Frontiers in Optics 2010/Laser Science XXVI, 2010
We show SNR comparisons of 4th order ghost images from PDC and 2nd order thermal images from single beams. Ghost imaging yields low background and shows improvement of the entangled light over thermal light SNR.
Barbara A. Capron +2 more
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We show SNR comparisons of 4th order ghost images from PDC and 2nd order thermal images from single beams. Ghost imaging yields low background and shows improvement of the entangled light over thermal light SNR.
Barbara A. Capron +2 more
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Signal-to-noise-ratio (SNR) of X-ray imaging scintillators determined by luminescence measurements
Applied Radiation and Isotopes, 1999A new method for studying the signal-to-noise-ratio (SNR) of X-ray imaging scintillators was developed. SNR was expressed in terms of the X-ray luminescence eAciency (XLE) the X-ray to emitted light conversion eAciency and the mean light photon energy.
D. Cavouras +4 more
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