Results 71 to 80 of about 606,792 (311)
An MRI assessment of mechanisms underlying lesion growth and shrinkage in multiple sclerosis
Annals of Clinical and Translational Neurology, EarlyView.By applying the tensor model, we analysed lesion orientation and the directionality of lesion expansion/contraction in multiple sclerosis. Each lesion is summarized as an ellipsoid, and the tensor model is applied to calculate lesion anisotropy. From the top to the bottom white matter atlas, surface‐in gradient segmentation and venous atlas used in the
Ermelinda De Meo +9 more
wiley +1 more source
Multi-channel Time-Varying Covariance Matrix Model for Late Reverberation Reduction [PDF]
arXiv, 2019 In this paper, a multi-channel time-varying covariance matrix model for late reverberation reduction is proposed. Reflecting that variance of the late reverberation is time-varying and it depends on past speech source variance, the proposed model is defined as convolution of a speech source variance with a multi-channel time-invariant covariance matrix
arxiv
Real-time reverberation generator [PDF]
The Journal of the Acoustical Society of America, 1975 Since the performance of an active sonar is often limited by reverberation, an instrument which could produce accurate reverberation in real time would be valuable to sonar designers, users, and evaluators. An instrument is proposed which can satisfy their needs.
openaire +2 more sources
Annals of Clinical and Translational Neurology, EarlyView.Abstract Objective Exploring the prevalence and association between intracranial atherosclerosis (ICAS) and cerebral small vessel diseases (CSVD), this study delved beyond the current scope, utilising high‐resolution vessel wall MRI (HRVW‐MRI) to investigate how subtle changes in intracranial atherosclerotic features influence the various burdens of ...
Joseph Amihere Ackah +6 more
wiley +1 more source
A Composite T60 Regression and Classification Approach for Speech Dereverberation [PDF]
arXiv, 2023 Dereverberation is often performed directly on the reverberant audio signal, without knowledge of the acoustic environment. Reverberation time, T60, however, is an essential acoustic factor that reflects how reverberation may impact a signal. In this work, we propose to perform dereverberation while leveraging key acoustic information from the ...
arxiv
Progressive Myoclonus Epilepsy: Distinctive MRI Changes in Cerebellar and Motor Networks
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Progressive myoclonus epilepsy (PME) is a rare generalized epilepsy syndrome with a well‐characterized genetic basis. The brain networks that are affected to give rise to the distinctive symptoms of PME are less well understood. Methods Eleven individuals with PME with a confirmed genetic diagnosis and 22 controls were studied.
Jillian M. Cameron +3 more
wiley +1 more source
Water Reverberation Travel Time Analysis Acquired Using Multi-Depth Streamers
Terrestrial, Atmospheric and Oceanic Sciences, 2016 Ghost reflections and water reverberations are major and inevitable seismic noises in marine seismic exploration. More recently, new receiver deployment techniques at different sea depths for signal-to-noise ratio (SNR) enhancement are developing.
Po-Yen Tseng +3 more
doaj +1 more source
Modulation-Domain Kalman Filtering for Monaural Blind Speech Denoising and Dereverberation [PDF]
arXiv, 2018 We describe a monaural speech enhancement algorithm based on modulation-domain Kalman filtering to blindly track the time-frequency log-magnitude spectra of speech and reverberation. We propose an adaptive algorithm that performs blind joint denoising and dereverberation, while accounting for the inter-frame speech dynamics, by estimating the ...
arxiv
Spatial resolution of late reverberation in virtual acoustic environments [PDF]
arXiv, 2021 Late reverberation involves the superposition of many sound reflections resulting in a diffuse sound field. Since the spatially resolved perception of individual diffuse reflections is impossible, simplifications can potentially be made for modelling late reverberation in room acoustics simulations with reduced spatial resolution.
arxiv
Reverberation Time and Power Model in Indoor Wireless Scenarios [PDF]
Radioengineering, 2018 A novel, room-electromagnetics-theory-based model for reverberation time, path gain and Power Delay Profile (PDP) is proposed. Unlike the traditional models describing only the reflections, the new model takes not only reflections at boundaries, but also
J. She +4 more
doaj