Results 61 to 70 of about 520,939 (335)

Normalized differential method for improving the signal-to-noise ratio of a distributed acoustic sensor.

Applied Optics, 2019
We experimentally introduce a normalized differential method to enhance the time domain signal-to-noise ratio (SNR) of an optical fiber distributed acoustic sensor (DAS).
I. Ashry, Y. Mao, M. Alias, T. Ng, F. Hveding, M. Arsalan, B. Ooi   +6 more
semanticscholar   +1 more source

Network Localization of Fatigue in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Fatigue is among the most common symptoms and one of the main factors determining the quality of life in multiple sclerosis (MS). However, the neurobiological mechanisms underlying fatigue are not fully understood. Here we studied lesion locations and their connections in individuals with MS, aiming to identify brain networks ...
Olli Likitalo, Jaakko Kungshamn, Albert Bellmunt‐Gil, Silvia Tommasin, Abhineet Ojha, Matias Viitala, Juho Aaltonen, Jyrki Lötjönen, Juha Koikkalainen, Pauli Ylikotila, Patrizia Pantano, Merja Soilu‐Hänninen, Juho Joutsa   +12 more
wiley   +1 more source

Development of an Imaging Spectrometer with a High Signal-to-Noise Ratio Based on High Energy Transmission Efficiency for Soil Organic Matter Detection

Sensors
Hyperspectral detection of the change rate of organic matter content in agricultural remote sensing requires a high signal-to-noise ratio (SNR). However, due to the large number and efficiency limitation of the components, it is difficult to improve the ...
Jize Fan, Yuwei Wang, Guochao Gu, Zhe Li, Xiaoxu Wang, Hanshuang Li, Bo Li, Denghui Hu   +7 more
doaj   +1 more source

Simple Noise Mitigation Scheme for Coherent Optical DMT Signal Transmission System

IEEE Access, 2020
We propose and experimentally demonstrate a noise mitigation scheme for coherent optical discrete multitone (DMT) signal transmission system. The proposed scheme can mitigate the laser phase noise and additive white Gaussian noise (AWGN) simultaneously ...
Ke Li, Tianye Huang, Zhong Liu, Qianqian Liu, Yunlei Zhang, Liguo Liu, Lu Li, Xiang Li   +7 more
doaj   +1 more source

Real‐World Investigation of Satralizumab in Patients With Neuromyelitis Optica Spectrum Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Satralizumab, a monoclonal antibody targeting the interleukin‐6 receptor, has demonstrated efficacy in clinical trials for neuromyelitis optica spectrum disorder (NMOSD). However, its real‐world effectiveness and safety compared to conventional immunosuppressive therapies remain uncertain.
Li‐Tsung Lin, Hui‐An Lin, Sheng‐Feng Lin   +2 more
wiley   +1 more source

High Coherence Mid-Infrared Dual Comb Spectroscopy Spanning 2.6 to 5.2 microns

, 2017
Mid-infrared dual-comb spectroscopy has the potential to supplant conventional high-resolution Fourier transform spectroscopy in applications that require high resolution, accuracy, signal-to-noise ratio, and speed.
Baumann, Esther, Coddington, Ian, Diddams, Scott A., Giorgetta, Fabrizio R., Herman, Daniel, Newbury, Nathan R., Ycas, Gabriel   +6 more
core   +1 more source

Acousto-optical coherence tomography with a digital holographic detection scheme [PDF]

, 2012
Acousto-optical coherence tomography (AOCT) consists in using random phase jumps on ultrasound and light to achieve a millimeter resolution when imaging thick scattering media. We combined this technique with heterodyne off-axis digital holography.
Benoit, Emilie, Bossy, Emmanuel, Farahi, Salma, Gross, Michel, Ramaz, François   +4 more
core   +5 more sources

Prediction of Myasthenia Gravis Worsening: A Machine Learning Algorithm Using Wearables and Patient‐Reported Measures

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Myasthenia gravis (MG) is a rare disorder characterized by fluctuating muscle weakness with potential life‐threatening crises. Timely interventions may be delayed by limited access to care and fragmented documentation. Our objective was to develop predictive algorithms for MG deterioration using multimodal telemedicine data ...
Maike Stein, Haoqi Sun, Sophie Lehnerer, Lea Gerischer, Maximilian Mönch, Christian Meisel, Andreas Meisel, Pushpa Narayanaswami   +7 more
wiley   +1 more source

Influence of illumination angle on the output parameters of a silicon photomultiplier

Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук
The influence of supply voltage on the photosignal value and signal-to-noise ratio has been studied while changing the incidence angle of optical radiation on the photosensitive surface of Ketek PM 3325, ON Semi FC 30035, and KOF5-1035 silicon ...
I. R. Gulakov, A. O. Zenevich, O. V. Kochergina   +2 more
doaj   +1 more source

A Pulse Shaping Based Optical Transmission System of 128QAM for DWDM with N × 904 Gbps

Applied Sciences, 2019
In this paper, we propose an optical transmission system of 128 quadrature amplitude modulation for dense wavelength division multiplexing. In such a system, Gaussian optical filtering is used to get an appropriate photonic carrier.
Guang Li, Jianqing Li
doaj   +1 more source