Taking system water undercooling as growth - driving force of methane hydrate, relational expression between methane hydrate growthratio and undercooling is fitted.
系统水过冷度作为甲烷水合物生长驱动力，拟合出甲烷水合物生长速率与过冷度的关系式。
2
These methods such as withdrawal narrow neck of seed, setting feasible temperature field, cont rolling the crystal growthratio and reducing vibration of machine are presented.
例如，通过缩细颈，布置合理的温场，控制晶体的生长速率和减少机械振动等方法。
3
The results show: (1)the average growthratio of China's dairy industry from 1998 to 2005 is 0.6% , the decline of technical efficiency can not counteract the improvement of technical progress.