Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
parameter estimation » parameter estimates, parameter optimization
qspr algorithm » mppt algorithm, our algorithm
layer using » layer being, paper using, cancer using
using qspr » using qtspim

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