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Wyszukujesz frazę "measurement standard" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Standard deviation in the simulation of statistical measurements
Autorzy:
Przystupa, Krzysztof
Kolodiy, Zenoviy
Yatsyshyn, Svyatoslav
Majewski, Jacek
Khoma, Yuriy
Petrovska, Iryna
Lasarenko, Serhiy
Hut, Taras
Powiązania:
https://bibliotekanauki.pl/articles/2203365.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
standard deviation
measurement
relaxation time
energy spectrum
Opis:
Is this article simulation of statistical measurements is performed on the basis of which the analysis of the standard deviation of the obtained results is carried out. It is shown that the standard deviation is minimum and independent from measurement duration while an object is in the state of equilibrium. For objects in a stationary non-equilibrium state the standard deviation depends on the duration measurements and the parameters of the state. The influence of these factors on the standard deviation is assessed with equation which includes the relaxation time. The value of the relaxation time is determined by approximating the energy spectrum of the studied signals. The analysis of energy spectra showed that the spectrum of white noise is inherent in objects in equilibrium; the flicker component of the spectrum occurs when the state of the object deviates from equilibrium.
Źródło:
Metrology and Measurement Systems; 2023, 30, 1; 17--30
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Lithuanian national standard of electric resistance
Autorzy:
Bartašiūnas, Andrius
Miškinis, Rimantas
Smirnov, Dmitrij
Urba, Emilis
Powiązania:
https://bibliotekanauki.pl/articles/1849159.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
measurement standards
electric resistance
standard resistor
calibration
uncertainty
prediction
Opis:
The Lithuanian national standard of electric resistance is maintained as the basis for calibration and measurement capabilities published in the key comparison database of the International Bureau of Weights and Measures (BIPM). The stability and uncertainty of the resistance value measurements, performed since 2004 using the calibrated values of the standard resistors to predict their future behaviour as well as influence of environmental conditions, are discussed. Also discussed is the recovery of a standard resistor which had undergone a mechanical disturbance. It is concluded that the standard resistors operated by the Lithuanian National Electrical Standards Laboratory feature stable drift of resistance, which is well predicted by means of linear regression.
Źródło:
Metrology and Measurement Systems; 2020, 27, 4; 615-624
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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