The phrase "as the key variable" is correct and usable in written English.
It can be used when discussing a primary factor or element that significantly influences an outcome or result in a particular context.
Example: "In this study, we identified temperature as the key variable affecting plant growth."
Alternatives: "as the main factor" or "as the primary variable".
The structural parameters of the micromixer were optimized in the simulation, with groove location taken as the key variable.
The friction coefficient between the simulant and the wall of the sampling tube is also tested and used as the key variable in the following simulation and study.
Mathematical modelling identified FRR as the key variable in the microfluidic process, with the highest impact on liposome size, polydispersity and transfection efficiency.
The ERP responses to novel spoken word-forms at ~50 ms after the stimulus divergence point, whose online increase has previously been shown to indicate neural representation build-up and behavioural word learning25 were a priori chosen as the key variable and an index of rapid neural plasticity for new word-forms.
Real-time LMP, as the key variable for network congestion management [1], is obtained as the by-product of the security constrained economic dispatch (SCED) in the market management system (MMS).
This postal area data is exploited to measure an index of diversity as the key variable in measuring the distribution of foreign nationals and to merge with an instrument and an alternative index of diversity computed from census data.
The temperature and concentration of the electrolyte are identified as the key variables which influence the conductivity of PPy.
Using the displacements of the 3-D surface as the key variables, the proposed method utilizes a geometrically nonlinear finite element analysis based upon the improved the stress-adapted numerical form finding of pre-stressed surfaces by the updated reference strategy.
Moreover, as the key variables needed for the model can be obtained easily, our model is not site-specific or limited to elephants, but rather can be applied to a wide range of browsing herbivores across a number of reserves of different sizes.
In this paper, perceived information asymmetry and trading trust are taken as the key variables that influence lending intention.
As the key variables in our proposed model are unobservable (i.e. market orientation, entrepreneurial orientation), we must measure these using multiple items from the survey.
