Dictionary
Derived quantity
A quantity in a system of quantities defined in terms of the base quantities of that system — speed, force, pressure. VIM (JCGM 200:2012…
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Dictionary
Derived unit
A measurement unit for a derived quantity, formed as a product of powers of base units — the newton (kg·m·s⁻²) or the…
Documents
SP 811 — Guide for the Use of SI Units
…This means that the coherent SI derived unit for each of these quantities is the number one, symbol 1. That is, because plane angle…
Documents
SP 330 — International System of Units
…numerical values of quantities take exactly the same form as the equations between the quantities themselves. Some of the coherent derived units in the…
Dictionary
System of units
A set of base and derived units, with their multiples and submultiples, defined under given rules for a given system of quantities. VIM (JCGM…
Dictionary
Sensitivity coefficient
The partial derivative ∂f/∂xᵢ of the measurement model with respect to an input quantity, evaluated at the estimates: it converts an input standard…
…The partial derivatives in Eq. 3 represent the sensitivity of the measurand to the uncertainty of each input quantity. 5.2 Volumetric Flow Volumetric…
…The partial derivatives in Eq. 8 represent the sensitivity of the measurand to the uncertainty of each input quantity. In cases where correlated uncertainties…
…Derivation of the Uncertainty Equations for the Hybrid Generator The total uncertainty of a quantity z is related to the n individual uncertainty components…
1 Introduction The National Institute of Standards and Technology (NIST) is responsible for realizing, maintaining, and disseminating the derived SI unit of thermodynamic pressure…