@article{He2017, author = "Yuxin He and Jin Qin and Jian Hong", title = "{Efficiency changes with demands changing.}", year = "2017", month = "4", url = "https://plos.figshare.com/articles/figure/Efficiency_changes_with_demands_changing_/4866824", doi = "10.1371/journal.pone.0175526.g004" }