利用直接求微分的方法，给出了右伸长张量率的不变性表示公式。
An invariant formula for the right stretch tensor rate is given by a differential method directly.
针对普通立式车床的不足之处，在保留右刀架机械结构和操作功能不变的基础上对C5225立式车床的左刀架进给系统进行了数控化改造。
According to the shortage of C5225 vertical lathe, numerical control alteration on feed system of C5225 vertical lathe was done in the base of keeping the mechanism structure and handling function.
在第五章里，我们得到了常返右过程的不变测度的存在性、唯一性及其遍历性。
In chapter 5, we obtain the invariant measure and the ergodic property of recurrent right processes.
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