A low-cost handheld apparatus for inspection of peach firmness by sensing fruit resistance. - Dachen Wang; Chengqiao Ding; Zhe Feng; Di Cui (Comput. Electron. Agric., 2020)

Integration of vibration and optical techniques for watermelon firmness assessment. - Chengqiao Ding; Dachen Wang; Zhe Feng; Weihao Li; Di Cui (Comput. Electron. Agric., 2021)