School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo, 255049, China. Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo, 255049, China. Zibo City Key Laboratory of Agricultural Product Safety Traceability, Zibo, China. School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo, 255049, China. gym@sdut.edu.cn. Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo, 255049, China. gym@sdut.edu.cn. Zibo City Key Laboratory of Agricultural Product Safety Traceability, Zibo, China. gym@sdut.edu.cn.