Agricultural labor force aging; Land resources use efficiency; Inverted "u" typecurve.
农业劳动力老龄化;土地资源利用效率;倒“U”型关系。
2
Besides, an automated typecurve matching technique other than manual method is applied here to explain the underground hydraulic fracture parameters conveniently.
改变了过去的手动曲线拟合为自动拟合,便于解释地下水力裂缝参数。
3
Results showed that the growth and development of White-Cheeked Starling's nestlings was divided into three period, the nestlings growth presented the "s" typecurve.