A Novel Optimized Asynchronous Federated Learning Framework. - Zhicheng Zhou; Hailong Chen; Kunhua Li; Fei Hu; Bingjie Yan; Jieren Cheng; Xuyan Wei; Bernie Liu; Xiulai Li; Fuwen Chen; Yongji Sui (HPCC/DSS/SmartCity/DependSys, 2021)