通过在轴流脱粒与分离装置试验台进行单因素试验，分析了凹板间隙对谷物联合收割机作业性能的影响。
The study was according to the single parameter on the axial threshing and separating unit test bed, and concave clearance had an effect on its work performance was analyzed.
该方法将系统中不确定及干扰部分分离出来，构造不确定量的联合上界，然后分两步进行分析。
Uncertainty and disturbance of the systems are separated from the systems to construct a conjoint upper boundary of the uncertainty. The process was analysed in two steps.
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