A useful method is given which can count the least positive period of a continuous function by Fourier coefficients.
给出了一个利用福里哀系数求非常值的连续周期函数的最小正周期的有效方法。
Horizontal well is the most effective method for tapping the rich residual oil zone on the top of thick positive rhythm reservoir in extra-high water-cut period.
水平井技术是挖潜特高含水期正韵律厚油层顶部剩余油富集区最为有效的方法。
Conclusion Cutting stump of umbilical cord of newborn during the early period is a active and positive nursing method, and it can reduce the umbilical infection in newborn.
结论新生儿脐带早期修剪，是一种主动、积极的护理方法，减少了新生儿脐部感染。
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