Results 21 to 30 of about 809,574 (244)

The Generalized Lyapunov Demodulator: High-Bandwidth, Low-Noise Amplitude and Phase Estimation

open access: yesIEEE Open Journal of Control Systems, 2022
Effective demodulation of amplitude and phase is a requirement in a wide array of applications. Recent efforts have increased the demodulation performance, in particular, the Lyapunov demodulator allows bandwidths up to the carrier frequency of the ...
Michael R. P. Ragazzon   +4 more
doaj   +1 more source

Diffraction in grating optical filters with angular-selective light transmission [PDF]

open access: yesКомпьютерная оптика, 2020
The effect of diffraction on the directional light transmittance of grating optical filters designed for smart windows is studied. The filter has an angular selective light transmission due to two thin-film gratings formed by "non-transmissive ...
R.S. Zakirullin
doaj   +1 more source

Morphological Filters Based on Motif Combination for Functional Surface Evaluation [PDF]

open access: yes, 2011
Regarded as the complement of commonly used mean-line based filters, morphological filters are more function oriented. They are relevant to geometrical properties of surfaces and offers better results for functional prediction of surfaces.
Lou, Shan, Jiang, Xiang, Scott, Paul J.
core   +3 more sources

Two high-order superfine comb filters based on HiBi Fiber Ring

open access: yes上海师范大学学报. 自然科学版, 2017
Considering optical filter based on HiBi fiber generally has one input and one output with the fixed interval of the wavelength,this paper designs two new tunable high-order superfine comb filters based on HiBi fiber Sagnac ring.They have the particular ...
Tian Jiayang, Wu Xiangnong
doaj   +1 more source

Electrocardiographic reference values for healthy Netherland Dwarf rabbits and the influence of body position, age and gender

open access: yesWorld Rabbit Science, 2017
The aim of this study was to provide reference values for a single, popular breed of pet rabbit. Moreover, additional objectives were to determine whether sex, body position or age alter Netherland Dwarf rabbit electrocardiographic variables and whether ...
J. M. Chapel   +4 more
doaj   +1 more source

Evaluation of Turbulent Jet Characteristic Scales Using Joint Statistical Moments and an Adaptive Time-Frequency Analysis

open access: yesFluids, 2022
This paper presents an analysis of turbulence characteristic scales and eddy convection velocity of jet flows computed using joint statistical moments, digital filters, and a modified version of the empirical mode decomposition (EMD).
Anderson R. Proença, Stefano Meloni
doaj   +1 more source

Improving Chest Monitoring through Magnetic Resonance Angiogram Image Contrast Enhancement

open access: yesLife, 2023
Magnetic resonance angiography is a medical procedure used to offer an image of the blood vessels and organs of the body. Given the worldwide spread of cardiovascular diseases, more and more resources are invested in treating them. One of the most modern
Beatrice Arvinti, Alexandru Isar
doaj   +1 more source

Geometric Coplanar Constraints-Aided Autonomous Celestial Navigation for Spacecraft in Deep Space Exploration

open access: yesIEEE Access, 2019
Autonomous celestial navigation has been exploited for orbit determination of deep space exploration. Geometric constraints in celestial measurement are the inherent attributes in actual comprehensive autonomous celestial navigation physical systems ...
Xin Ma, Xiaolin Ning, Xiao Chen, Jin Liu
doaj   +1 more source

New ELIN Systems Using CMOS Transistors in Weak Inversion Operation

open access: yesAdvances in Electrical and Computer Engineering, 2013
In this paper new ELIN systems implemented by using CMOS transistors in weak inversion operation are presented. The proposed systems exploit the exponential-law characteristics of the subthreshold CMOS transistors.
BOZOMITU, R. G., CEHAN, V.
doaj   +1 more source

Use of Filters to Smooth Out Signals Collected through Mobile Devices in the Static and Dynamic Balance Assessment: A Systematic Review

open access: yesApplied Sciences, 2022
Background: When performing motion analysis using sensors, the signal often comes with noise and it is necessary to use filters to exclude unwanted frequencies.
Karina Sá   +6 more
doaj   +1 more source

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