Perhaps you should try some spelling variations:
"learning-based a simulation techniques" » "learning-based a mitigation techniques", "learning-based a segmentation techniques", "learning-based a inhalation technique", "learning-based _ simulation techniques", "learning-based k simulation techniques", "learning-based n simulation techniques"
"learning-based mri imputation techniques" » "learning-based mri implantation technique", "learning-based mri augmentation techniques", "learning-based mri segmentation techniques", "learning-based mri simulation techniques", "learning-based mil imputation techniques"

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