Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
objective estimation » objective optimization, objective allocation
forecasting mixed » forecasting method, forecasting air
mixed algorithm » driven algorithm, winner algorithm

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• Performing a fuzzy search may retrieve terms with similar spellings: (( modified objective estimation algorithms ) or ( model forecasting mixed algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified objective estimation algorithms ) OR ( model forecasting mixed algorithm )).
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