Particulate emission risks of HEVs during cold-starts and warm-restarts: Characterisation of particulate number under fresh and aged aftertreatment systems - Siyuan Zhang; Xin Wang; Chongyao Wang; Nan Yang; Zihao Ge; Chen Dong; Liangxiao Hou; Yirou Zhang; Liqun Lyu; Jianwei Tan; Lijun Hao; Yunshan Ge (Journal of Hazardous Materials, 2026)