理论数学

Vol.5 No.2 (March 2015)

等差数列的N项和及其应用
Methodology for Sum of N Terms of an Arithmetic Series and Its Application

 

作者:

吴东武 :中石化广州石油化工总厂,广东 广州

 

关键词:

等差数列N项和双心螺线极径螺旋板换热器Arithmetic Series Sum of N Terms Double-Center Spiral Polar Radius Spiral-Plate Heat Exchangers

 

摘要:

本文通过计算实例,介绍了等差数列N项和的计算方法。双心螺线概念在本文重新提出,用以確定螺旋板换热器和其它板卷的长度与直径。四心螺线作图法及其计算与本課题相关,在此一并作了介绍。

This paper introduces the methodology for calculating the sum of N terms of an arithmetic series with practical examples. The concept of the double-center spiral is introduced again to determine the length and diameter of a spiral heat exchanger and other plate coils as well. A related topic, the drawing and its calculation of a four-center spiral, is also presented.

文章引用:

吴东武 (2015) 等差数列的N项和及其应用。 理论数学, 5, 34-45. doi: 10.12677/PM.2015.52006

 

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