?url_ver=Z39.88-2004&rft_id=10.1109%2FACCESS.2020.3020356&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=A.&rft.au=Bala%2C+A.&rft.aulast=Bala&rft.title=IEEE+Access&rft.date=2020&rft.volume=8&rft.issn=21693536&rft.atitle=An+Improved+Grasshopper+Optimization+Algorithm+Based+Echo+State+Network+for+Predicting+Faults+in+Airplane+Engines&rft.pages=159773-159789&rft.genre=article