... M常数轨迹 locus of constant M N常数轨迹 locus of constant N 等机率密度轨迹 locus of constant probability density ...
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This paper has proved that a plane curve cis a circle if and only ifc is the locus of a moving point that has a constant second power average of distances from n fixed points.
本文提出了确定内燃机配气机构刚度的三种数据处理方法，并对处理结果作出了分析、比较，确认二次刚度平均法是一种较好的实用方法。
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