Funding for this research was provided by:
Educational Commission of Gansu Province of China (No.2017B-33)
Natural Science Foundation of Gansu Province (No.17JR5RA159)
National Civil Committee & Key Labo- ratory of Ministry of Education of China National Language and Information Technology (NO.KFJJ201612)
Public Se- curity Audio-visual Technology Innovation Teaching Team of Gansu Political Science and Law Institute
Characteristic Dis- cipline of Evidence Science in Gansu Province
Key Dis- cipline of Public Security and Technology of Gansu Political Science and Law Institute
Article History
First Online: 25 August 2018