2Firk R, Stamer E, Junge W, et al. Automation of oestrus detection in dairy cows: a review[J]. Livestock Production Science, 2002, 75: 219-232.
3Roelofs J, Lrpez-Gatius F, Hunter R H F. When is a cow in estrus? Clinical and practical aspects[J]. Theriogenology, 2010, 74: 327-344.
4Huzzey J M, Keyserlingk, Weary D M. Changes in feeding, drinking, and standing behavior of dairy cows during the transition period[J]. Journal of Dairy Science, 2005, 88:2454 -2461.
5Ravi N, Dandekar N, Mysore P, et al. Activity recognition from accelerometer data[C]//Proceedings of the 17th Conference on Innovative Applications of Artificial Intelligence (IAAI) Pittsburgh, USA, 2005: 1541-1546.
6Watanabe T, Sakurai A, Kitazaki K. Dairy cattle monitoring using wireless acceleration-sensor networks[C]//Proceedings of IEEE Sensors, 2008: 526-529.
7Lovendahl P, Chagunda M G G. On the use of physical activity monitoring for estrus detection in dairy cows[J]. Dairy Sci, 2008, 93: 249-259.
8Nariyasu Watanabe, Seiichi Sakanoue, Kensuke Kawamura et al. Development of an automatic classification system for eating, ruminating and resting behavior of cattle using an accelerometer[J]. Grassland Science, 2008, 54(4): 231-237.
9Martiskainen P, Jarvinen M, Skon J P, et al. Cow behaviour pattern recognition using a three-dimensional accelerometer and support vector machines[J]. Applied Animal Behaviour Science, 2009, 119(1): 32-38.
10Robert B, White B J, Renter D G, et al. Evaluation of three- dimensional accelerometers to monitor and classify behavior patterns in cattle[J]. Computers and Electronics in Agriculture, 2009, 67(1/2): 80-84.
