Results 51 to 60 of about 1,364,258 (188)

Signal-to-noise ratio in parametrically driven oscillators [PDF]

Physical Review E, 2011
Submitted to Phys.
Batista, Adriano A., Moreira, Raoni S. N.   +1 more
openaire   +3 more sources

A pseudo-matched filter for chaos

, 2012
A matched filter maximizes the signal-to-noise ratio of a signal. In the recent work of Corron et al. [Chaos 20, 023123 (2010)], a matched filter is derived for the chaotic waveforms produced by a piecewise-linear system.
Cohen, Seth D., Gauthier, Daniel J.
core   +1 more source

Sensitivity of wide band detectors to quintessential gravitons [PDF]

, 1999
There are no reasons why the energy spectra of the relic gravitons, amplified by the pumping action of the background geometry, should not increase at high frequencies.
A. A. Starobinsky, A. Abramovici, A. G. Riess, B. Allen, B. Allen, B. Allen, B. Caron, C. Bradaschia, C. E. Reece, C. E. Reece, C. L. Bennett, C. M. Caves, D. Babusci, E. Flanagan, E. Flanagan, F. Pegoraro, G. Veneziano, I. Zlatev, J. B. Rehm, J. Jafry, K. Danzmann, K. Tsubono, L. F. Abbott, L. H. Ford, L. P. Grishchuk, L. P. Grishchuk, L. P. Grishchuk, L. P. Grishchuk, M. Gasperini, M. Gasperini, M. Gasperini, M. Giovannini, M. Giovannini, M. Giovannini, M. Giovannini, N. Christensen, P. J. E. Peebles, P. J. E. Peebles, P. M. Garnavich, P. Michelson, R. Fabbri, R. R. Caldwell, S. Perlmutter, T. Vachaspati, V. A. Rubakov, V. F. Schwartzman, V. Kaspi, V. Sahni   +47 more
core   +2 more sources

Non-uniformity of Clinical Head, Head and Neck, and Body Coils in Magnetic Resonance Imaging (MRI) [PDF]

Iranian Journal of Medical Physics, 2014
Introduction Signal intensity uniformity in a magnetic resonance (MR) image indicates how well the MR imaging (MRI) system represents an object. One of the major sources of image non-uniformity in high-field MRI scanners is inhomogeneity of radio ...
Mahmood Nazarpoor
doaj   +1 more source

Optimisation of the bone single photon emission computed tomography in oncology patients

Journal of Health Sciences
Introduction: The introduction of hybrid imaging systems such as Single Photon Emission Computed Tomography/Computed Tomography (SPECT/CT) has completely changed the scanning procedure of conventional diagnostic nuclear medicine protocols.
Nusret Salkica, Amela Begić, Adnan Beganović, Fuad Julardžija, Adnan Šehić, Halil Ćorović, Safet Hadžimusić, Amra Skopljak-Beganović   +7 more
doaj   +1 more source

Pilot Signal Design for Massive MIMO Systems: A Received Signal-To-Noise-Ratio-Based Approach

, 2014
In this paper, the pilot signal design for massive MIMO systems to maximize the training-based received signal-to-noise ratio (SNR) is considered under two channel models: block Gauss-Markov and block independent and identically distributed (i.i.d ...
Kim, Donggun, Lee, Yuni, So, Jungho, Sung, Youngchul   +3 more
core   +1 more source

Material imaging study of 3D printing materials for diagnostic radiology phantom development

Brazilian Journal of Radiation Sciences
The 3D printing techniques have found applications across diverse fields, significantly enhancing design and manufacturing processes. The impact of this growth is particularly notable in radiology, where 3D printing has been applied to developing quality
Marcus Oliveira, Matheus Savi, Adriano Vitor, Daniel Villani, Marco Andrade, Carlos Ubeda, Mauricio Mitsuo Monção   +6 more
doaj   +1 more source

Sagnac Interferometer Enhanced Particle Tracking in Optical Tweezers

, 2010
A setup is proposed to enhance tracking of very small particles, by using optical tweezers embedded within a Sagnac interferometer. The achievable signal-to-noise ratio is shown to be enhanced over that for a standard optical tweezers setup.
Berne B J, H-A Bachor, Hsu M T L, J Knittel, M A Taylor, M T L Hsu, Sehgal H, Treps N, Van De Hulst H C, W P Bowen   +9 more
core   +1 more source

3D MR neurography with gadolinium contrast to improve the visualization of pelvic nerves and the branches

Frontiers in Physiology
ObjectiveTo evaluate the effectiveness of 3D NerveVIEW sequence with gadolinium contrast on the visualization of pelvic nerves and their branches compared to that without contrast.MethodsParticipants were scanned twice using 3D NerveVIEW sequence with ...
Hui Liu, Zhibo Xiao, Li Tao, Mingmei Tang, Yong Xu, Yuanrui Pan, Ke Zhang, Xueke Qiu, Fajin Lv, Fajin Lv   +9 more
doaj   +1 more source

Low Frequency Noise Characterization and Signal-to-Noise Ratio Optimization for Silicon Hall Cross Sensors

IEEE Journal of the Electron Devices Society, 2015
In this paper, silicon-based Hall cross sensors with different device dimensions and carrier densities are designed and fabricated. Low frequency noise behavior regarding to the device dimension and carrier density of the Hall cross sensors has been ...
Dongli Zhang, Mingxiang Wang, Kai Sun
doaj   +1 more source