“…These two approaches can be combined to achieve the optimal acquisition function (Xu et al, 2003;Donmez et al, 2007;Huang et al, 2010;Karzand and Nowak, 2020). Recently, as another approach, methods of learning acquisition functions have also been proposed (Konyushkova et al, 2017;Sener and Savarese, 2018;Taguchi et al, 2021).…”