Results 11 to 20 of about 3,609,059 (246)

Group-delay measurement of frequency-converting devices using a comb generator [PDF]

open access: yes, 2010
We propose a new method for the measurement of (group) delay from the radio-frequency (RF) input to the intermediate-frequency (IF) output of a mixer or a receiver.
Scott, Jonathan B., Hoy, M.
core   +1 more source

Soft Sensor Modeling Method for the Marine Lysozyme Fermentation Process Based on ISOA-GPR Weighted Ensemble Learning

open access: yesSensors, 2023
Due to the highly nonlinear, multi-stage, and time-varying characteristics of the marine lysozyme fermentation process, the global soft sensor models established using traditional single modeling methods cannot describe the dynamic characteristics of the
Na Lu, Bo Wang, Xianglin Zhu
doaj   +1 more source

Effect of V-Shaped Groove Microstructure on Blood Flow Resistance in Bionic Artificial Blood Vessels

open access: yesApplied Bionics and Biomechanics, 2023
This study aims to investigate the blood flow in bionic artificial blood vessels and to reduce the resistance to blood flow, the drag reduction characteristics of V-shaped groove drag reduction microstructures in artificial blood vessel structures were ...
Zhou Li   +7 more
doaj   +1 more source

Feature Fusion Classifier With Dynamic Weights for Abnormality Detection of Amniotic Fluid Cell Chromosome

open access: yesIEEE Access, 2023
Chromosomal karyotype is important to determine whether a newborn has a genetic disorder. There are two main categories of chromosomal abnormalities: structural abnormalities, in which the chromosome structure is altered, and chromosome number ...
Wenbin He   +7 more
doaj   +1 more source

Measures in organizational behavior: why don’t we use big data and analytics? [PDF]

open access: yesEstudos de Psicologia (Campinas), 2020
Tradeoff analysis, between generalizability, precision, and realism, guides methodological choices in organizational behavior. These methodological choices were systematically reviewed in Brazilian articles and books (1996-2017) to answer the following ...
Rafael de Melo BALANIUK   +1 more
doaj   +1 more source

Analysis and Experiment of 5-DOF Decoupled Spherical Vernier-Gimballing Magnetically Suspended Flywheel (VGMSFW)

open access: yesIEEE Access, 2020
Due to the capacity of outputting both the high precision torque and the instantaneous large torque, the vernier-gimballing magnetically suspended flywheel (VGMSFW) is regarded as the key actuator for spacecraft.
Qiang Liu   +4 more
doaj   +1 more source

Developing Overall Equipment Effectiveness Metrics for Prototype Precision Manufacturing [PDF]

open access: yes, 2011
Overall Equipment Effectiveness (OEE) is a powerful metric of manufacturing performance incorporating measures of the utilisation, yield and efficiency of a given process, machine or manufacturing line.
O\u27Neill, Michael   +2 more
core   +2 more sources

Application and Comparison of Non-Contact Vibration Monitoring Methods for Concrete Railway Sleepers

open access: yesApplied Sciences, 2022
This paper describes the non-contact vibration monitoring of prestressed reinforced concrete railway sleepers. The monitoring was carried out using physical measuring equipment consisting of a seismograph and geophones, a robotic total station (RTS) and ...
Boštjan Kovačič   +3 more
doaj   +1 more source

Estudo comparativo entre dois métodos de medida da distância interpupilar Comparative study between two measurement methods of interpupillary distance

open access: yesRevista Brasileira de Oftalmologia, 2008
OBJETIVO: O objetivo do estudo é realizar as medidas da Distância Interpupilar (DIP) entre a régua milimetrada e o autorrefrator e comparar os resultados entre si. MÉTODOS: Cento e trinta e cinco pacientes foram submetidos à avaliação da DIP.
Daniela Vieira Roehe   +1 more
doaj   +1 more source

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