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It can be observed that for all conditions, the COF exhibits a fast transient stage (less than 5000 cycles) before stabilization.Stabilized values were determined by averaging COF on the N¦Å last cycles, with [N¦Å, N]defined as the interval for which standard deviation ¦Å is less than 1.5%.
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handsomboy(½ð±Ò+1, ·­ÒëEPI+1): 2010-05-25 16:46:58
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