Funding for this research was provided by:
National Natural Science Foundation of China (61672334, 61671041)
National Natural Science Foundation of China (61773119)
National Natural Science Foundation of China (61703256, 61771297)
Shenzhen Science and Technology Innovation Committee (ZDSYS201703031748284)
Fundamental Research Funds for the Central Universities (GK201703062)
Article History
Received: 4 January 2018
Accepted: 22 March 2018
First Online: 4 April 2018