RT Journal T1 Identifying PM2.5 samples collected in different environment by using terahertz time-domain spectroscopy A1 Chenghong WU, Xinyang MIAO, Kun ZHAO PB Front. Optoelectron. FD 2018-08-31 YR 2018 JF Frontiers of Optoelectronics JO Front. Optoelectron. VO 11 IS 3 SP 256 DO 10.1007/s12200-018-0805-1 K1 PM#sub#2.5#/sub#;terahertz time-domain spectroscopy (THz-TDS);statistical methods LK {https://journal.hep.com.cn/foe/EN/article/article_22477.shtml}