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The establishment of non-linear model of piezoelectric actuator is a key link of the nano-scale micro-displacement measurement and control. Due to the inherent nonlinearity and the influence of load pressure, piezoelectric actuator always causes position error in the open-loop system and instability in the closed-loop system. Based on the experiment of creep characteristics, the effect of driven voltage...
For the facilitypsilas location of logistics distribution network (LDN), we analyze a case that Wal-Mart chooses the logistics distribution centers in China. According to the candidate combination schemes and theirs criterions of the case, we retain the experts using Delphi method to get the weight distribution vectors of these schemes. Because analytic hierarchy process (AHP) method only uses the...
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