The phrase "are based on first" is not correct and lacks clarity in written English.
It may be intended to refer to something that relies on a primary source or initial concept, but it needs additional context to be meaningful.
Example: "The conclusions of the study are based on first-hand accounts from participants."
Alternatives: "are derived from initial" or "are grounded in primary".
Within a new question and answer section Apple said: "Years of use, which are based on first owners, are assumed to be four years for OS X and tvOS devices and three years for iOS and watchOS devices".
Both, the plant and controller models are based on first principles.
The nonlinear formulations are based on first order shear deformation theory (FSDT) and large deflection von Karman equations.
(ii) Dynamic Energy Budget DEBB) models are based on first principles including the idea that metabolism is organised in the same way within all animals.
These methods are based on first identifying extreme environmental conditions with a given probability of exceedance based on the relevant joint distribution function.
Both methods are based on first modifying only the phase spectrum, after which the time-domain signal is computed using the inverse Fourier transform.
These studies are based on first-principles quantum transport calculations and non-equilibrium Green's function techniques.
Many transmission adaptation algorithms are based on first-order Markov channel models [1, 2].
The models are based on first-order shear deformation plate theory and account for the effects of large deformations as well as propagation and reflection of flexural waves.
This review article summarizes recent progress in research on mononuclear catalysts that are based on first-row transition-metal elements, namely manganese, iron, cobalt, nickel, and copper.
The modeling of plate and beam are based on first-order shear deformable laminated composite plate theory with large deflection and large deformable beam theory respectively.
