1. School of Reliability and Systems Engineering, Beihang University, XueYuan Rd., No. 37, Haidian District, Beijing 100191, China, https://orcid.org/0000-0002-5372-143X
2. School of Reliability and Systems Engineering, Beihang University, XueYuan Rd., No. 37, Haidian District, Beijing 100191, China
3. School of Reliability and Systems Engineering, Beihang University, XueYuan Rd., No. 37, Haidian District, Beijing 100191, China (Corresponding author), e-mail:xudan@buaa.edu.cn