The phrase 'primary equation' is correct and is used in written English.
It is typically used in mathematics to refer to an equation that describes the main or fundamental aspects of a problem or situation. For example, "The primary equation for this physics problem is F = ma."
However, in this paper, the primary equation from the aforementioned model was evaluated for its ability to characterize a thin film's response to temperature.
Since the advent of well logging, resistivity logs have been constantly used to determine the value of water saturation by using the Archie equation as the primary equation to determine water saturation.
We predict the fitted values from the first stage and insert that back into the structural equation, as the IV, replacing the endogenous regressor, before performing ordinary least square (OLS) estimation on the second stage, which is the primary equation of interest.
This time around, the respective spouses are part of the primary equation.
The primary equation of this model is The most common formulation for λi is the log-linear model, ln λ i = β'X i The variables were regressed on a set of factors integrated into the equation.
Age was removed from the primary equations for two reasons.
In that case, the primary equations are homogeneous, and a conventional hybrid multistage explicit method based on central differencing and second- and fourth-order scalar artificial dissipation can be applied to solve both the primary and adjoint systems.
For a given formulation, rigorous construction of the Schur-complement, in which the full Jacobian is reduced to a system for the primary equations in terms of the primary unknowns, is performed purely algebraically.
The method of transforming the set of flux equations for two simultaneous processes into a new set of processes is reviewed and applied to diffusion in one-phase materials where the two primary equations describe the individual diffusion of the components and the new ones describe the migration of Kirkendall markers and interdiffusion.
In the Kumar kinetics model proposed by Kumar and Kunzru, there are ten changeable selectivity coefficients and minor-changeable kinetics parameters in the primary reaction equation.
In order to treat the transition from diffusion-controlled to partitionless growth it may be necessary to introduce a third primary flux equation.
