Perhaps you should try some spelling variations:
"modified optimal estimation algorithms" » "modified optimal estimation algorithm", "modified optimal optimization algorithms", "modified optimal optimisation algorithm", "modified optimal taxation algorithms", "modified thermal estimation algorithms"
"modified objective solution algorithm" » "modified objective evolutionary algorithm", "modified objective allocation algorithm", "modified objective evolution algorithm", "modified objective convolution algorithms"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified optimal estimation algorithms") OR ("modified objective solution algorithm"))~.
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