Perhaps you should try some spelling variations:
"modified dfdaptive quantization algorithm" » "modified adaptive quantization algorithm", "modified dfdaptive estimation algorithm"
"modified 3d optimisation algorithm" » "modified 3d optimization algorithms", "modified 3d estimation algorithm", "modified 3d estimation algorithms", "modified _ optimisation algorithm", "modified _ optimization algorithm", "modified qoe optimization algorithm", "modified df optimisation algorithm", "modified adam optimisation algorithm"

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