Perhaps you should try some spelling variations:
parameters optimisation » parameter optimization, parameter estimation
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
n algorithm » _ algorithm, _ algorithms, _ algorithmic
code based » model based, coal based, income based
based n » based _, based k, based no2

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• Performing a fuzzy search may retrieve terms with similar spellings: (( code based n algorithm ) OR ( modified parameters optimisation algorithm ))~.
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