Analysis is conducted for the variation of cutting force during the cutting process and the effect of negative shearing on the cutter damage is pointed out.
分析了切削过程中切削力的变化情况，并指出负剪切现象对刀具破损的影响。
Multi vari analysis is an improvement tool for analyzing process variation patterns.
多变异分析是一种用于分析工序过程质量特征值变异规律的重要方法。
Periodical analysis showed that abrupt change of sediment load happened in 1968 and 1984, which divided the variation process of river sediment load into three stages.
中国主要河流入海泥沙还具有明显的三个阶段变化特征，即分别在1968年和1984年前后发生了突变。
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