The phrase "alterations to the model" is correct and usable in written English.
You can use it when discussing changes or modifications made to a specific model, whether in a scientific, engineering, or artistic context.
Example: "The researchers implemented several alterations to the model to improve its accuracy in predicting outcomes."
Alternatives: "modifications to the model" or "changes to the model".
Primary alterations to the model include addition of small seedling demography, soil saturation effects, shade adaption of tree photosynthesis, and browsing algorithms.
We therefore tested how various alterations to the model's design could affect the predicted decrease in directional selectivity under high-frequency stimulation.
No other alterations to the model were made.
Below we discuss some possible alterations to the model, which might contribute to greater model realism, albeit whilst incurring a loss of generality.
Our aim was to include these components with the least alterations to the Drosophila model in a way that all key experimental observations in control and MO experiments in Nematostella could be reproduced and thus generate a minimal viable model of BMP signaling maintenance in Nematostella after symmetry break (see the Supplemental Experimental Procedures for details).
This showed that alterations to the standard fall velocity model of HYSPLIT were required to deal with ash particles larger than about 100 microns, which make up the bulk of ash deposits near a volcano.
However, even though the proteomics data boosts confidence in individual gene models and suggests alterations to the filtered set of "best" models, the total peptide coverage on many of these gene models is often poor.
"However, in practice, given the constant 'crisis' the airline industry always seems to be in, any major alteration to the present model is not a realistic possibility: Think the Concorde, for example".
In our previous work, six models were created using the alterations to the classifier described above.
The only alteration made to the model was to allow gene class population frequencies to vary; previously the values were fixed.
We investigated whether such manipulation could induce behavioural alterations relevant to the modelling of ADHD, in particular symptoms of hyperactivity and impulsivity.
