**Acknowledgements**

This work was supported by the National Science Foundation (Grant no.: DMR9619353), USA; the Hebei Province Science and Technology Support Program (Grant no.: 15961006D), the Hebei Province Science and Technology Research Program for Colleges and Universities (Grant no.: QN2016206), and the Start-up Fund of Doctoral Research at North China Institute of Aerospace Engineering (Grant no.: BKY201405), China.
