Results 1 to 10 of about 23,814,243 (249)

SAR village targets extraction and heterogonous image registration

open access: yesThe Journal of Engineering, 2019
Since the signal-to-noise ratio of synthetic aperture radar (SAR) image is low, it is difficult to match SAR images with optical images accurately. A new method of SAR village targets extraction and heterogonous image registration is proposed in this ...
Qixue Li, Kuiying Yin
doaj   +1 more source

Modeling of vibration for functionally graded beams

open access: yesOpen Mathematics, 2016
In this study, a vibration problem of Euler-Bernoulli beam manufactured with Functionally Graded Material (FGM), which is modelled by fourth-order partial differential equations with variable coefficients, is examined by using the Adomian Decomposition ...
Yiğit Gülsemay   +2 more
doaj   +1 more source

Assessing Landscape Fragmentation Dynamics with Fourier Transforms

open access: yesJournal of Landscape Ecology
Quantifying landscape fragmentation is crucial for understanding its impact on biodiversity. Within landscape ecology, there is an ongoing effort to create metrics that systematically characterize landscape patterns and predict their effects on various ...
Rahimi Ehsan, Dong Pinliang
doaj   +1 more source

Exploring market efficiency in cryptocurrencies: Fourier analysis of non-linear dynamics and breaks

open access: yesIstanbul Business Research
This study evaluates cryptocurrency market efficiency through an analysis of 25 leading cryptocurrencies traded between 2014 and 2024. This research employs the Augmented Dickey–Fuller (ADF) test and its Fourier-augmented variant (Fourier ADF, FADF), the
Cemal Öztürk
doaj   +1 more source

Oil Palm Tree Detection from High Resolution Drone Image Using Convolutional Neural Network

open access: yesJournal of Engineering Technology and Applied Physics, 2019
We propose a method to combine several image processing methods with Convolutional Neural Network (CNN) to perform palm tree detection and counting. This paper focuses on drone imaging, which has a high image resolution and is widely deployed
Chee CheongLee   +3 more
doaj   +1 more source

A Holographic Antenna Based on Surface Wave Launcher

open access: yes水下无人系统学报
In this paper, a semi-open waveguide structure of a half-band ground medium was selected to improve the design of the TM-mode surface wave launcher(SWL), and the surface wave field generated by this SWL was simulated and analyzed.
Ming REN
doaj   +1 more source

Fantastic squeaks and where to find them: producing and analysing audible acoustics from leipäjuusto

open access: yesCurrent Directions in Biomedical Engineering
Chewing not only converts food chunks to digestible proportions, it also conveys audible acoustics resulting in a perception on the type and condition of the food being eaten.
Nurkkala Elina   +3 more
doaj   +1 more source

Fourier Analysis of CMFD Method in Cylindrical Geometry

open access: yesYuanzineng kexue jishu
The coarse mesh finite difference (CMFD) method has been widely adopted as an acceleration algorithm for neutron transport calculations, effectively reducing computational costs and improving convergence.
WEN Yuchen, HAO Chen, WANG Yizhen
doaj   +1 more source

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