1. Fundamental Research Innovation Center, Research Institute of Highway Ministry of Transport, 8 Xitucheng Rd., Beijing 100088, China, https://orcid.org/0000-0002-6703-8156 (X.L.), http://orcid.org/0000-0001-5826-6387 (Y.W.), http://orcid.org/0000-0001-8314-2124 (X.Z.)
2. Fundamental Research Innovation Center, Research Institute of Highway Ministry of Transport, 8 Xitucheng Rd., Beijing 100088, China (Corresponding author), e-mail: xd.wang@rioh.cn, https://orcid.org/0000-0003-2634-0452