2Cho H K, Kwonl Y. Crack Detection in Eggs by Machine Vision[J]. Journal of Agricultural Engineering Research, 1996,73(4):385-389.
3Goodrum J W, Elster R T. Machine vision for crack detection on rotation eggs[J]. Transactions of the ASAE,1992,35(4):1323-1328.
4Jenshin L, Lin Y, Hsieh M. An Automatic System for Eggshell Quality Monitoring[J]. Transactions of the ASAE,2001,44(3):1028-1034.
5Lowen R. Mathematics and fuzziness, Part I[J]. Fuzzy Sets and Systems,1988,27(1):1-3.
6张正松 傅尚新.旋转机械振动检测与故障诊断[J].机械设计,1991,7(9):42-44.
7Robinson B E. An evaluation of acoustical decay time as a measure of watermelon maturity[D]. M S thesis. University of Georgia, Athens,1976.
8De Belie N. Firmness changes of pear fruit before and after harvest with the acoustic impulse response technique[J]. Journal of Agricultural Engineering Research,2000,77(5):343-379.