Through experiment this paper analyses the signals of the gear box, then comparing with the model curve of the different conditions in order to distinguish the operatingtrouble of the gear box.
结合实验对齿轮箱信号进行时间序列分析，对比各种工况下的模型曲线，识别齿轮箱的运行故障。
2
Many firms operating brick and mortar stores are in trouble.
许多经营实体店的公司都陷入了困境。
3
The doctor went on to say that she would have a 40 percent possibility of having a heart trouble during the operation, a 35 percent possibility of being unable to stand up, and even 20 percent of dying on the operating table because of her old age.