Funding for this research was provided by:
National Natural Science Foundation of China (61171180)
Fundamental Research Funds for the Central Universities (HIT. MKSTISP. 2016 26)
Fundamental Research Funds for the Central Universities (HIT. MKSTISP. 2016 13)
a fund from the Science and Technology on Electronic Information Control Laboratory
Article History
Received: 16 September 2017
Accepted: 10 May 2018
First Online: 4 June 2018
Competing interests
: The authors declare that they have no competing interests.
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