偶排列 meaning in English

even permutation

The permutation is even if the number of inversions it contains is even .
如果一个排列中含有的反序的个数是偶数，则称它为偶排列。
Abstract : the maximum tube distribution numbers in tube sheet limited circle for fixed tube sheet heatexchanger have been determinded by used of the superposition method with computer based on c language programming . it is characterized by determination the maximum tube distribution number according to the even number or singular number of center tube distribution . the method is simply and quickly , and can be used for the design and process calculation of heatexchangers
文摘:采用迭加的方法，使用c语言编程在微机上实现管板布管限定圆最大布管数的确定.该方法可根据中心布管数是奇排列还是偶排列来确定最大布管数，简便易行，计算速度快，对换热器的设计及工艺计算具有实用价值