Results 11 to 20 of about 161,142 (265)

Acoustic Parametric Signal Generation for Underwater Communication

open access: yesSensors, 2018
This paper presents a study of different types of parametric signals with application to underwater acoustic communications. In all the signals, the carrier frequency is 200 kHz, which corresponds to the resonance frequency of the transducer under study ...
María Campo-Valera   +6 more
doaj   +1 more source

A parametric macromodelling technique

open access: yes2009 European Conference on Circuit Theory and Design, 2009
With the ever growing complexity of high-frequency systems in the electronic industry, formation of reduced-order models or compact macromodels of these systems is paramount. In this contribution, a Fourier series expansion technique is ex­tended to form a modeling strategy to approximate the frequency-domain behaviour of a system based on several ...
Marissa Condon, Georgi G. Grahovski
openaire   +2 more sources

Underwater Communication Using Acoustic Parametric Arrays

open access: yesProceedings, 2017
This paper presents a study of different types of parametric signals with application to submarine acoustic telecommunications. In all of them, the carrier frequency is 200 kHz, which corresponds to that resonation of the transducer under study, while ...
Miguel Ardid   +5 more
doaj   +1 more source

Special aspects of modulation RCS measurement in Ka-band [PDF]

open access: yesITM Web of Conferences, 2019
Radar reflectors are used as standards for radioelectronic devices calibration, as navigation beacons for air and naval traffic control and for radar visibility increase. Controlled (parametric) reflectors change reflected signal characteristics.
Kryuchkov Igor V.   +2 more
doaj   +1 more source

Parametric array technique for microbubble excitation

open access: yesIEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2011
This study investigates the use of an acoustic parametric array as a means for microbubble excitation. The excitation wave is generated during propagation in a nonlinear medium of two high-frequency carrier waves, whereby the frequency of the excitation wave is the difference frequency of the carrier waves.
Vos, H.J.   +3 more
openaire   +6 more sources

Non-parametric and semi-parametric support estimation using SEquential RESampling random walks on biomolecular sequences

open access: yesAlgorithms for Molecular Biology, 2020
Non-parametric and semi-parametric resampling procedures are widely used to perform support estimation in computational biology and bioinformatics. Among the most widely used methods in this class is the standard bootstrap method, which consists of ...
Wei Wang   +3 more
doaj   +1 more source

Engineering and Analytical Method for Estimating the Parametric Reliability of Products by a Low Number of Tests

open access: yesInventions, 2022
The paper provides an overview of methods for determining reliability indicators and, on the basis of the analysis, proposes a new method for assessing the parametric reliability of products based on a small number of tests.
Alexey G. Amosov   +4 more
doaj   +1 more source

Parametric test for non-normally distributed continuous data: For and against

open access: yesElectronic Physician, 2019
Choosing between parametric and non-parametric statistical tests for analysis of non-normally distributed continuous data is a long-standing controversy.
Umesh Wadgave, Mahesh Ravindra Khairnar
doaj   +1 more source

Impact of credit on household food security: The case of Omo microfinance institution in southern Ethiopia

open access: yesJournal of Agriculture and Food Research, 2023
To effectively address the pressing issue of insufficient food production and limited purchasing power among rural farm households in Ethiopia, it is of utmost importance to empower them through comprehensive developmental mechanisms and evaluate the ...
Amanuel Boltana   +4 more
doaj   +1 more source

Efficient Ring-Cavity Terahertz Parametric Oscillator With Pump Recycling Technique

open access: yesIEEE Photonics Journal, 2019
The energy scaling of THz wave in wide range based on surface-emitted (SE) ring-cavity terahertz parametric oscillator (TPO) with pump recycling technique is demonstrated in this paper.
Longhuang Tang   +8 more
doaj   +1 more source

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