Perhaps you should try some spelling variations:
"defined network optimisation algorithmssssss" » "defined network optimization algorithms", "defined network optimization algorithmsssssss", "defined network estimation algorithmssssss", "defined network estimation algorithmsssssss", "defined network optimization algorithmssssss", "designed network optimisation algorithmssssss"
"modified objective optimisation algorithm" » "modified objective optimization algorithm", "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective estimation algorithms"

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