Results 51 to 60 of about 5,113,790 (286)

Advanced techniques on multirate signal processing for digital information processing [PDF]

, 2011
Multirate signal processing has become a key topic enabling efficient techniques for digital information processing in a variety of applications such as digital transceivers s for wireless as well as satellite communication systems, digital broadcasting,
Massimiliano Laddomada, GORDANA JOVANOVIC DOLECEK, Markku Renfors   +2 more
core  

Blind Single Channel Deconvolution using Nonstationary Signal Processing [PDF]

, 2003
Blind deconvolution is fundamental in signal processing applications and, in particular, the single channel case remains a challenging and formidable problem. This paper considers single channel blind deconvolution in the case where the degraded observed
Rayner, Peter J. W., Hopgood, James; id_orcid   +1 more
core   +1 more source

Selenium‐Integrated Cyanine Dye With Enhanced Photophysical Properties for Optoacoustic‐Guided Cancer Imaging and Therapy

Advanced Functional Materials, EarlyView.
This study introduces selenium‐integrated cyanine dye (Se‐Cyn), with superior photostability, absorption, and photothermal efficiency, outperforming ICG in NIR window. Its nanoparticle form remains stable in water, accumulates in tumors, and enables strong optoacoustic imaging and effective phototherapy outcomes.
Divyesh Shelar, Snehal Salunkhe, Tony Fröhlich, Uwe Klemm, Pia Anzenhofer, Birgit Rathkolb, Martin Hrabě de Angelis, Oliver Plettenburg, Michael Sattler, Sudesh T. Manjare, Vipul Gujrati, Vasilis Ntziachristos   +11 more
wiley   +1 more source

Bayesian Fusion Based Robust Array Shape Estimation for Distorted Towed Hydrophone Array

Journal of Marine Science and Engineering
Towed hydrophone arrays are widely employed for underwater target detection and direction-of-arrival (DOA) estimation. However, array shape distortion induced by ocean currents, internal waves, and platform maneuvers severely degrades beamforming ...
Chuanqi Zhu, Jiani Zhang, Yitong Li, Liang An   +3 more
doaj   +1 more source

Multi-Head Attention-Based Long Short-Term Memory for Depression Detection From Speech

Frontiers in Neurorobotics, 2021
Depression is a mental disorder that threatens the health and normal life of people. Hence, it is essential to provide an effective way to detect depression.
Yan Zhao, Zhenlin Liang, Jing Du, Li Zhang, Li Zhang, Chengyu Liu, Li Zhao   +6 more
doaj   +1 more source

Spatial Acoustic Signal Processing

, 2012
A sound field on a line or in a plane has an effectively limited spatial bandwidth determined by the temporal frequency. Similar can be said for sound fields from far-field sources when analyzed on circular and spherical apertures. Namely, for a given frequency and aperture size, a sound field is effectively composed of a finite number of circular or ...
openaire   +2 more sources

Characteristics of the acoustic emission during horizontal single grit scratch tests: Part 1 characteristics and identification [PDF]

, 2009
Material process in grinding involves three phenomena namely: rubbing, ploughing and cutting. Rubbing and ploughing, which usually occur before or after cutting, essentially mean the energy is being applied less efficiently in terms of material removal ...
Chen, Xun, Griffin, James Marcus
core   +1 more source

A Nonlinear Organic Low‐Frequency Sound Sensor Based on Electrochemical Coupling in a Solidified Gel Membrane

Advanced Functional Materials, EarlyView.
A novel nonlinear infrasound sensor concept based on a free‐standing ion conductive gel membrane is introduced. Acoustic signals are directly transduced into an electrical signal using an internal application mechanisms (gating). The nonlinearity might be used for neuromorphic in‐sensor computing. ABSTRACT Measuring low‐frequency or infrasound acoustic
Maarten Mittmann, Carsten Habenicht, Andreas Hofacker, Richard Kantelberg, Stefan Jacob, Karl Leo, Hans Kleemann   +6 more
wiley   +1 more source

AMR-ESVT: Efficient and Accuracy-Preserving Construction of Lightweight Effective Sound Velocity Tables via Adaptive Mesh Refinement

Journal of Marine Science and Engineering
Accurate compensation for acoustic ranging errors is essential for high-precision underwater positioning. However, existing effective sound velocity table (ESVT) methods remain constrained by the computational overhead of dense spatial grids and ...
Chuanqi Zhu, Fengkai Huang, Chenxi Han, Liang An   +3 more
doaj   +1 more source

An Improved Velocity Estimation Method for Wideband Multi-Highlight Target Echoes in Active Sonar Systems

Sensors, 2018
In active sonar systems, the target echoes are usually equivalent to a superposition of the Doppler-scaled reflections from multiple highlights. The reflections overlap with each other both in the time and frequency domain, which results in a decreased ...
Shuxia Huang, Shiliang Fang, Ning Han
doaj   +1 more source