Funding for this research was provided by:
Natural Science Foundation of Hunan Province (2019JJ50377)
Scientific Research Fund of Hunan Provincial Education Department (17C0953)
NNSFC (11731009)
DFG (CRC 1283 “Taming uncertainty and profiting from randomness and low regularity in analysis, stochastics and their applications”.)
Article History
Received: 1 October 2019
Revised: 2 April 2020
First Online: 13 July 2020