Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"modified d convolution algorithms" » "modified d evolution algorithm", "modified d solution algorithm", "modified d convolutional algorithms", "modified df convolution algorithms", "modified _ convolution algorithms", "modified adam convolution algorithms"

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