Results 21 to 30 of about 37,206,520 (227)

LEAST SQUARES MULTI-WINDOW EVOLUTIONARY SPECTRAL ESTIMATION

open access: yesElectrica, 2003
We present a multi-window method for obtaining the time-frequency spectrum of non-stationary signals such as speech and music. This method is based on optimal combination of evolutionary spectra that are calculated by using multi-window Gabor expansion ...
Mahmut YALÇIN, Aydın AKAN
doaj   +2 more sources

Time frequency analysis of olfactory induced EEG-power change. [PDF]

open access: yesPLoS ONE, 2017
The objective of the present study was to investigate the usefulness of time-frequency analysis (TFA) of olfactory-induced EEG change with a low-cost, portable olfactometer in the clinical investigation of smell function.A total of 78 volunteers ...
Valentin Alexander Schriever   +5 more
doaj   +1 more source

EEG-Based Seizure Detection Using Variable-Frequency Complex Demodulation and Convolutional Neural Networks

open access: yesSignals, 2023
Epilepsy is a complex neurological disorder characterized by recurrent and unpredictable seizures that affect millions of people around the world. Early and accurate epilepsy detection is critical for timely medical intervention and improved patient ...
Yedukondala Rao Veeranki   +2 more
doaj   +1 more source

Radar Detection-Inspired Signal Retrieval from the Short-Time Fourier Transform

open access: yesSensors, 2022
This paper presents a novel adaptive algorithm for multicomponent signal decomposition from the time–frequency (TF) plane using the short-time Fourier transform (STFT).
Karol Abratkiewicz
doaj   +1 more source

Time–Frequency Analysis in Rn

open access: yes, 2021
Funding Information: Vesa Vuojamo is supported by the Vilho, Yrjö and Kalle Väisälä Foundation of the Finnish Academy of Science and Letters. Publisher Copyright: © 2021, The Author(s).A time–frequency transform is a sesquilinear mapping from a suitable ...
Vuojamo, Vesa   +2 more
core   +1 more source

Fine Classification Method for Massive Microseismic Signals Based on Short-Time Fourier Transform and Deep Learning

open access: yesRemote Sensing, 2023
Numerous microseismic signals are produced by rock mass fracture during earthquakes, geological disasters, or underground excavations. Moreover, a large amount of noise signals are captured during microseismic signal monitoring.
Chunchi Ma   +8 more
doaj   +1 more source

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan   +18 more
wiley   +1 more source

An optical fibre-based frequency dissemination network for Australia

open access: yes, 2011
An optical-fibre network is being planned for distribution of optical and microwave reference frequencies in Australia. This network would connect a number of research facilities and the National Measurement Institute (NMI), allowing long-range ...
Luiten, A.   +9 more
core   +1 more source

Real-time Analysis of Sensory Dissonance [PDF]

open access: yes, 2007
We describe a tool for real-time musical analysis based on a measure of roughness, the principal element of sensory dissonance. While most historical musical analysis is based on the notated score, our tool permits analysis of a recorded or live audio ...
Einbond, A.   +3 more
core   +3 more sources

Micro-Doppler Feature Extraction of Rotating Structures of Aircraft Targets with Terahertz Radar

open access: yesRemote Sensing, 2022
The micro-Doppler features formed by the micro-motion of rotating blades of rotors and turbines are of great significance for aircraft target detection and recognition.
Xiaoyu Qin, Bin Deng, Hongqiang Wang
doaj   +1 more source

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