Results 41 to 50 of about 1,063,165 (294)

On the difference-to-sum power ratio of speech and wind noise based on the Corcos model

, 2018
The difference-to-sum power ratio was proposed and used to suppress wind noise under specific acoustic conditions. In this contribution, a general formulation of the difference-to-sum power ratio associated with a mixture of speech and wind noise is ...
Habets, Emanuël A. P., Mirabilii, Daniele   +1 more
core   +1 more source

Comparison of Spatial and Temporal Averaging on Ultrafast Imaging in Presence of Quantization Errors [PDF]

, 2015
In compound plane wave imaging (CPWI), multiple plane waves are used to insonify the imaging region with different steering angles. The compounding operation is effectively a spatial averaging filter that reduces the speckles of the image and increases ...
Alomari, Z, Freear, S, Harput, S, Moubark, AM   +3 more
core   +1 more source

Application of Computed Tomography Virtual Noncontrast Spectral Imaging in Evaluation of Hepatic Metastases: A Preliminary Study

Chinese Medical Journal, 2015
Objective: The objective was to qualitatively and quantitatively evaluate hepatic metastases using computed tomography (CT) virtual noncontrast (VNC) spectral imaging in a retrospective analysis.
Shi-Feng Tian, Ai-Lian Liu, Jing-Hong Liu, Mei-Yu Sun, He-Qing Wang, Yi-Jun Liu   +5 more
doaj   +1 more source

Photo--assisted current and shot noise in the fractional quantum Hall effect [PDF]

, 2003
The effect of an AC perturbation on the shot noise of a fractional quantum Hall fluid is studied both in the weak and the strong backscattering regimes. It is known that the zero-frequency current is linear in the bias voltage, while the noise derivative
A. Crépieux, A. Kumar, A.A. Kozhevnikov, Adeline Crépieux, C. Bruder, C. de C. Chamon, C. de C. Chamon, C. de C. Chamon, C.L. Kane, C.L. Kane, C.L. Kane, C.W.J. Beenakker, D. Feldman, G. Cuniberti, G. Platero, G.B. Lesovik, G.B. Lesovik, G.B. Lesovik, G.B. Lesovik, H.H. Lin, I. Safi, J. Torrès, K.I. Imura, K.I. Imura, L. Saminadayar, L.H. Reydellet, L.P. Kouwenhoven, L.P. Kouwenhoven, M. Büttiker, M. Büttiker, M. Büttiker, M. Reznikov, M. Sassetti, M.H. Pedersen, P. Fendley, Pierre Devillard, R. Aguado, R. de-Picciotto, R.J. Schoelkopf, R.J. Schoelkopf, S.R. Yang, T. Martin, T. Martin, T. Martin, T. Martin, T.H. Oosterkamp, Thierry Martin, V. Rodriguez, V.V. Ponomarenko, X. Jehl, X.G. Wen, X.G. Wen, Y. Gavish, Y. Gavish, Y. Levinson, Y. Oreg   +55 more
core   +6 more sources

Super-resolution deep learning reconstruction at coronary computed tomography angiography to evaluate the coronary arteries and in-stent lumen: an initial experience

BMC Medical Imaging, 2023
A super-resolution deep learning reconstruction (SR-DLR) algorithm trained using data acquired on the ultrahigh spatial resolution computed tomography (UHRCT) has the potential to provide better image quality of coronary arteries on the whole-heart ...
Makoto Orii, Misato Sone, Takeshi Osaki, Yuta Ueyama, Takuya Chiba, Tadashi Sasaki, Kunihiro Yoshioka   +6 more
doaj   +1 more source

Quantum limit of optical magnetometry in the presence of ac-Stark shifts [PDF]

, 2000
We analyze systematic (classical) and fundamental (quantum) limitations of the sensitivity of optical magnetometers resulting from ac-Stark shifts. We show that in contrast to absorption-based techniques, the signal reduction associated with classical ...
Fleischhauer, M., Matsko, A. B., Scully, M. O.   +2 more
core   +3 more sources

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

Single Atom Detection from Low Contrast-to-Noise Ratio Electron Microscopy Images

Physical Review Letters, 2018
Single atom detection is of key importance to solving a wide range of scientific and technological problems. The strong interaction of electrons with matter makes transmission electron microscopy one of the most promising techniques. In particular, aberration correction using scanning transmission electron microscopy has made a significant step forward
Fatermans, J, Den Dekker, A, Müller-Caspary, K, Lobato, I, O'Leary, C, Nellist, P, Van Aert, S   +6 more
openaire   +5 more sources

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Fractional charge in the noise of Luttinger liquid systems

, 2005
The current noise of a voltage biased interacting quantum wire adiabatically connected to metallic leads is computed in presence of an impurity in the wire.
Dolcini, F., Grabert, H., Safi, I., Trauzettel, B.   +3 more
core   +2 more sources