The phrase "variation of the model" is correct and can be used in written English.
For example, "This year, we are introducing a new variation of the model. It features updated technology and a sleek, more modern design."
This model included a nominal dynamics and the ranges of variation of the model parameters.
In another variation of the model, the malicious host can, in addition, alter its whiteboard contents in order to deceive visiting agents.
The variation of the model parameters with temperature must be taken into account, but single sensor solutions are possible at relatively small Rayleigh numbers when convection is present.
To reach this objective, uncertainty and sensitivity studies applied to a model describing the system can reveal the inputs parameters that cause the most significant variation of the model outputs.
The models were then run with these sets, and the ensemble of output results was analysed statistically, yielding estimates of the uncertainty due to variation of the model parameteres.
The model was then evaluated using values obtained from a variation of the model of Dixon and Hendrix, using different particle sizes and superficial velocities; the results obtained by Dixon and Hendrix were reproduced, including extrapolation and interpolation of the variables.
Some other functions had slightly better fitting statistic but they gave unrealistic predictions outside the range of variation of the modelling data.
As Dell faced slower sales and increased competition, it experimented with minor variations of the model.
Variations of the model incorporate constraints on localization (shipping mileage) and greenhouse gas emissions.
It was also shown to be robust to parameter variations of the model.
We also present possible variations of the model, and discuss more general implications of the landscape picture in this context.
