MEST: Accurate and Fast Memory-Economic Sparse Training Framework on the Edge - Yuan, Geng; Ma, Xiaolong; Niu, Wei; Li, Zhengang; Kong, Zhenglun; Liu, Ning; Gong, Yifan; Zhan, Zheng; He, Chaoyang; Jin, Qing; Wang, Siyue; Qin, Minghai; et al. (Advances in Neural Information Processing Systems, 2021)