通过对周期性变量最大等待时间的分析，给出判断扫描变量表有效性判据。
Finally, the validity criterion of the scan variable table built is given by analyzing the maximum waiting time.
探讨了由于啮合刚度周期性变化引起的啮合参数失稳现象，得出了相应的啮合参数失稳判据。
This paper discuses the phenomenon by lost stability of gearing parameters in considering the gear mesh stiffness, and put forward a criterion of lost stability of gearing parameters.
所用的预测方法是倍周期性、静中动判据和地球物理灾害链。
The predicting methods used are multiplied periodicity, criterion of activity in quiescence and the geophysical disaster chain.
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