TY - Journal of Beijing University of Posts and Telecommunications A1 - LIU Pai, SUN Yan, REN Wei T1 - An ANTLR-Based Feature Extraction and Detection System for Scratch3.0 Y1 - 2019-11-15 00:00:00.0 JF - Journal of Beijing University of Posts and Telecommunications JO - Journal of Beijing University of Posts and Telecommunications SP - 70 EP - 75 VL - 42 IS - 6 UR - {https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2019-125} N1 - 10.13190/j.jbupt.2019-125 ER -