The mean effective population size could be estimated as a harmonic means of the ne 估计出平均有效种群大小，作为所有世代ne的调和平均值。
Abstract : in the research of internal combustion engine , recordingin - cylinder pressure and temperature is an essential technique to study the thermal cycle of internal combustion engine . the combustion analyzer developed in this study will give both the measurements at sampling points per crank angle or sampling cycle , calculate and show the real time parameters which decide the working process of internal combustion engine , such as pressure accelerating rate , indicateed mean effective pressure , cycle - to - cycle variation , heat release rate , etc . compared with the imported congeneric products , the analyzer has many advantages such as chinese interface , low price , easy operateing , convenience in maintainance and easy upgrading 文摘:为了测录内燃机缸内的压力及温度，开发了一种内燃机燃烧分析仪.该分析仪由国产高速数据采集卡及自行开发的控制软件组成.它不仅能精确设置每度曲轴转角内采样点的个数和采集循环数，而且在采集过程中能实时计算和表征内燃机工作过程的压力升高率、平均指示压力、循环变动率、放热率等参数.经实际使用以及与国外产品相比表明，此分析仪具有全中文界面、价格低、操作简单、使用维护方便、功能便于扩充等优点
The results show that the genetic diversity of filial generations is higher than self - bred progeny ’ s ， the hybrid vigor has manifested at metabolization level 。 the proportion of polymorphic loci ( p . 99 ) in f1 generations was 30 . 77 - 36 . 36 % ， the mean observed heterozygosity ( ho ) of jmcf （ japanese male chinese female ） was the highest with 0 . 1727 , the rest populations were ： jfcm （ japanese female chinese male ） 0 . 1536 、 cp 0 . 1273 and jp 0 . 1055 ， the mean effective number of allels per locus in f1 generations ： cp ’ s was the highest with 1 . 7318 ， jp ’ s was the lowest with 1 . 6718 ， the filial generations ’ values were in the midle of the cp ’ s and jp ’ s and between them there was no brightly difference , with 1 . 6955 ( jfp ) and 1 . 6927 ( jmp ) 各组的平均杂合度预期值也表现出该趋势，即：日自交组最低，为0 . 1786 ，日雄中雌杂交组的平均杂合度最高，为0 . 1964 ，日雌中雄杂交组和中自交组分别是0 . 1891和0 . 1865 。 hardy - weinberg平衡下遗传偏离指数也是杂交组的小于自交组的，平均每个位点的等位基因有效数目中自交组最高为1 . 7318 ，日自交组最低为1 . 6718 ，两杂交组群体的这一指数相差不多，分别是1 . 6955和1 . 6927 ，位于两亲本的中间水平。
