Results 41 to 50 of about 2,435,332 (149)

Equivalence analysis of dielectric test methods in time domain and frequency domain

International Journal of Electrical Power & Energy Systems
Wideband dielectric response is crucial for accurate assessment of insulation condition. However, time-domain measurements such as polarization and depolarization current (PDC) tests often lose high-frequency components, while frequency domain ...
Lin Du, Xin Li, Shixian Hui, Chao Xing
doaj   +1 more source

Time–Frequency Characteristics and SARIMA Forecasting of Atmospheric Water Vapor in East Asia

Atmosphere, 2023
Given the increasing impact of extreme rainfall and flooding on human life, studying and predicting changes in atmospheric water vapor (AWV) becomes particularly important.
Chaoli Tang, Ziyue Tong, Yuanyuan Wei, Xin Wu, Xiaomin Tian, Jie Yang   +5 more
doaj   +1 more source

Time to Frequency Domain Analysis of Narrow Band Antennas

International Journal of Antennas and Propagation, 2017
This paper presents system modeling of three different single band antennas using the singularity expansion method (SEM). To acquire the accurate physical complex poles and the corresponding residues of the narrow band antenna model, an enhanced Matrix ...
Sajjad Ur Rehman, Majeed A. S. Alkanhal
doaj   +1 more source

Conditions for the equivalence between IQC and graph separation stability results [PDF]

, 2017
This paper provides a link between time-domain and frequency-domain stability results in the literature. Specifically, we focus on the comparison between stability results for a feedback interconnection of two nonlinear systems stated in terms of ...
Carrasco, Joaquin, Seiler, Peter
core   +2 more sources

A new principle technic for the transformation from frequency domain to time domain

AIP Advances, 2017
A principle technic for the transformation from frequency domain to time domain is presented. Firstly, a special type of frequency domain transcendental equation is obtained for an expected frequency domain parameter which is a rational or irrational ...
Ben-Qing Gao
doaj   +1 more source

Cloud Based Fault Diagnosis by Convolutional Neural Network as Time–Frequency RGB Image Recognition of Industrial Machine Vibration with Internet of Things Connectivity

Sensors, 2023
The human-centric and resilient European industry called Industry 5.0 requires a long lifetime of machines to reduce electronic waste. The appropriate way to handle this problem is to apply a diagnostic system capable of remotely detecting, isolating ...
Dominik Łuczak, Stefan Brock, Krzysztof Siembab   +2 more
doaj   +1 more source

Unraveling cardiac arrhythmia frequency: comparative analysis using time and frequency domain algorithms

Frontiers in Signal Processing
During cardiac arrhythmia, the heart frequency is an important physiological parameter that can be identified by analyzing electrocardiogram (ECG) signals.
Laura Diaz-Maue, Laura Diaz-Maue, Laura Diaz-Maue, Annette Witt, Annette Witt, Lina Elshareif , Holger Nobach   +6 more
doaj   +1 more source

An Inverse Problem for Localization Operators

, 2012
A classical result of time-frequency analysis, obtained by I. Daubechies in 1988, states that the eigenfunctions of a time-frequency localization operator with circular localization domain and Gaussian analysis window are the Hermite functions.
, Daubechies I, Gröchenig K, Luís Daniel Abreu, Mallat S, Monika Dörfler, Paul T   +6 more
core   +1 more source

A time-domain control signal detection technique for OFDM [PDF]

, 2016
Transmission of system-critical control information plays a key role in efficient management of limited wireless network resources and successful reception of payload data information.
A Damnjanovic, Brian G. Stewart, G Ku, H Minn, H Zamiri-Jafarian, HC Nguyen, J Balakrishnan, J Pan, K Su, L Weng, LB Le, LJ Cimini, M Morelli, M Wen, MK Ozdemir, MO Damen, NI Miridakis, O Edfors, S Adegbite, S Coleri, SA Adegbite, Saheed A. Adegbite, Scott G. McMeekin, SJ Thiruvengadam, TVK Chaitanya, V Le Nir, X Cheng   +26 more
core   +1 more source

Frequency versus time domain immunity testing of Smart Grid components [PDF]

Advances in Radio Science, 2014
Smart Grid components often are subject to considerable conducted current disturbances in the frequency range 2–150 kHz and, as a consequence, it is necessary to provide reliable immunity test methods.
F. Gronwald
doaj   +1 more source