Results 11 to 20 of about 21,300,669 (261)

Design and simulation of high linearity CMOS analog multiplier

open access: yesDianzi Jishu Yingyong, 2020
A high linearity CMOS analog multiplier is designed and simulated. The input signal is preprocessed by active attenuator and the CMOS Gilbert multiplier is used for multiplication of the signal, and the bias circuit is designed meanwhile. When the supply
Ding Kun   +5 more
doaj   +1 more source

Explore Luminance Attenuation and Optical Crosstalk of RGB Mini Light-Emitting Diode via Microscopic Hyperspectral Imaging

open access: yesIEEE Journal of the Electron Devices Society, 2022
In this article, we experimentally and quantitatively investigate the luminance attenuation for red, green, and blue mini light-emitting diodes (LEDs), and the optical crosstalk in the RGB mini-LED array under different working currents via the ...
Lili Zheng   +10 more
doaj   +1 more source

Earthquake building damage detection based on synthetic-aperture-radar imagery and machine learning [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2023
This article presents a framework for semi-automated building damage assessment due to earthquakes from remote-sensing data and other supplementary datasets, while also leveraging recent advances in machine-learning algorithms.
A. Rao   +6 more
doaj   +1 more source

Visualizing surface formation of semi-regular polyhedra of Archimedes

open access: yesStructural Mechanics of Engineering Constructions and Buildings, 2020
The most common method of forming semi-control polyhedra consists in cutting off angles and ribs of regular polyhedra by planes. The aim of the work - to consider the automated formation of a number of surfaces of semi-regular Archimedean polyhedra based
Viktoryna A. Romanova
doaj   +1 more source

Heart Rate Estimation from Incomplete Electrocardiography Signals

open access: yesSensors, 2023
As one of the most remarkable indicators of physiological health, heart rate (HR) has become an unfailing investigation for researchers. Unlike many existing methods, this article proposes an approach to implement short-time HR estimation from ...
Yawei Song, Jia Chen, Rongxin Zhang
doaj   +1 more source

Acoustic Characterization for The Feeding Activities of Haliotis discus Hannai

open access: yesApplied Sciences, 2023
In order to analyze the sound production mechanism and the acoustic characteristics of Haliotis discus hannai during feeding, this paper proposes a multi-source information fusion approach combining passive acoustics with videos.
Hongyue Lin   +6 more
doaj   +1 more source

Polariton lasing in InGaN quantum wells at room temperature

open access: yesOpto-Electronic Advances, 2019
In this paper, we report the exciton polaritons in both positive and negative detuning micro cavities based on InGaN multi-quantum wells (MQWs) and the first polariton lasing in InGaN/GaN MQWs at room temperature by utilizing a 4.5λ Fabry-Perot (F-P ...
Wu Jinzhao   +8 more
doaj   +1 more source

Robust and Efficient Harmonics Denoising in Large Dataset Based on Random SVD and Soft Thresholding

open access: yesIEEE Access, 2019
The Hankel matrix of harmonic signals has the important low-rank property, based on which the principal components (or the eigenvectors) extracted from the matrix by singular value decomposition (SVD) could be applied for harmonic signal denoising ...
Yu Yang, Jian Rao
doaj   +1 more source

A model for hypermedia learning environments based on electronic books [PDF]

open access: yes, 1997
Designers of hypermedia learning environments could take advantage of a theoretical scheme which takes into account various kinds of learning activities and solves some of the problems associated with them.
Ignacio Aedo   +5 more
core   +1 more source

Vizualizing of semi-regular polyhedrons in AutoCAD environment

open access: yesStructural Mechanics of Engineering Constructions and Buildings, 2019
The paper examines the automated formation by the kinematic method of the surfaces of Archimedes' semi-regular polyhedra of three forms: truncated tetrahedron, truncated octahedron and truncated icosahedron.
Viktoryna A. Romanova
doaj   +1 more source

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