Results 11 to 20 of about 58,033 (264)

Adaptive filtering method combined with quality map for InSAS interferogram

open access: yesElectronics Letters, 2022
The quality of interferogram, which is limited by various phase noise, will greatly influence the subsequent processes of interferometric synthetic aperture sonar (InSAS), such as phase unwrapping and digital elevation model (DEM) estimation.
Pan Huang, Xiaojie Teng, Heping Zhong
doaj   +1 more source

An Unsupervised Anomaly Detection Based on Self-Organizing Map for the Oil and Gas Sector

open access: yesApplied Sciences, 2023
Anomaly detection plays a crucial role in preserving industrial plant health. Detecting and identifying anomalies helps prevent any production system from damage and failure.
Lorenzo Concetti   +3 more
doaj   +1 more source

Study on Fast Image Dehazing Based on Discriminant Filtering and Bilateral Filtering [PDF]

open access: yesJisuanji gongcheng, 2016
In order to improve the running efficiency of image dehazing algorithm and solve the color distortion problem in the bright area after dehazing, this paper puts forward a Fast Image Dehazing Algorithm based on Twice Filtering(TBFIDA).It gets the ambient ...
LIU Wanjun,ZHAO Qingguo
doaj   +1 more source

Hemispherically-unified surface maps of human cerebral cortex: reliability and hemispheric asymmetries. [PDF]

open access: yesPLoS ONE, 2012
Understanding the anatomical and structural organization of the cerebral cortex is facilitated by surface-based analysis enabled by FreeSurfer, Caret, and related tools.
Xiaojian Kang   +4 more
doaj   +1 more source

A generalization of the standard map and its statistical characterization

open access: yesScientific Reports, 2022
From the statistical mechanical point of view, area-preserving maps have great potential and importance. These maps exhibit chaotic and regular behavior separately or together in the available phase space as the control parameter changes.
Kivanc Cetin   +2 more
doaj   +1 more source

Two Area Preserving Maps from the Square to the p-Ball

open access: yesMathematical Modelling and Analysis, 2017
We construct two area preserving maps from the square to the p-ball (the domain defined by |x|p + |y|p ≤ |a|p ) and use them to obtain low distorted uniform grids on the p-ball.
Adrian Holhos
doaj   +1 more source

Kolmogorov-Arnold-Moser Theory and Symmetries for a Polynomial Quadratic Second Order Difference Equation

open access: yesMathematics, 2019
By using the Kolmogorov-Arnold-Moser (KAM) theory, we investigate the stability of two elliptic equilibrium points (zero equilibrium and negative equilibrium) of the difference equation t n + 1 = α t n + β t n 2 − t n ...
Tarek F. Ibrahim, Zehra Nurkanović
doaj   +1 more source

Stability analysis of a certain class of difference equations by using KAM theory

open access: yesAdvances in Difference Equations, 2019
By using KAM theory we investigate the stability of equilibrium points of the class of difference equations of the form xn+1=f(xn)xn−1,n=0,1,… $x_{n+1}=\frac{f(x _{n})}{x_{n-1}}, n=0,1,\ldots $ , f:(0,+∞)→(0,+∞) $f:(0,+\infty )\to (0,+\infty )$, f is ...
Senada Kalabušić   +3 more
doaj   +1 more source

Land Suitability Analysis for Sustainable Urban Development: A Case of Nabatiyeh Region in Lebanon

open access: yesJ, 2023
Urbanization has led to the degradation of green areas and natural resources, which are critical for preserving biodiversity and natural benefits. Sustainable urban development (SUD) practices aim to balance urbanization with preserving and protecting ...
Amal Al-Ghorayeb   +5 more
doaj   +1 more source

Object Detector with Residual Learning and Multi-scale Feature Enhancement [PDF]

open access: yesJisuanji kexue yu tansuo, 2023
At present, deep learning has achieved great success in the field of computer vision, but small object detection is still a challenging problem in the field of object detection.
JIA Tianhao, PENG Li, DAI Feifei
doaj   +1 more source

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