Perhaps you should try some spelling variations:
"modified quadratic optimization algorithms" » "modified quadratic optimisation algorithm", "modified quadratic estimation algorithms", "modified quadratic estimation algorithm", "modified quadratic optimisation algorithms", "modified quadratic estimation algorithmss", "modified static optimization algorithms"
"modified stochastic optimization algorithm" » "modified stochastic optimisation algorithm", "modified stochastic estimation algorithm", "modified stochastic estimation algorithms"

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