Identifying heavy metal sources and health risks in soil-vegetable systems of fragmented vegetable fields based on machine learning, positive matrix factorization model and Monte Carlo simulation

• Jiacheng ShiSouthwest University
• Yang YuSouthwest University
• Zhijie Shen
• Yuding LinSouthwest University
• Nan MeiChongqing Municipal Government
• Chengzhong LuoChongqing Municipal Government
• Yongmin WangSouthwest University
• Cheng ZhangSouthwest University
• Dingyong WangSouthwest University