Funding for this research was provided by:
National Key R and D Programs Project of China (2017YFC0804406)
NSF of China (61672321, 61771289, 61832012 and 61373027)
Training Program of the Major Research Plan of NSF of China (91746104)
Project of Shandong Province Higher Educational Science and Technology Program (J15LN19)
Open Project of Tongji University Embedded System and Service Computing of Ministry of Education of China (ESSCKF 2015-02)
Received: 13 November 2018
Accepted: 19 March 2019
First Online: 8 April 2019
: The authors declare that they have no competing interests.
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