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population average
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  群体平均值
     Among 229 families tested,103 families whose volume is larger than the population average,60 excellent families whose volume increases by 15 0% over the population average and 34 excellent families whose volume increases by 25 0% over the population average have been selected to use for various breeding work in seed orchards and thus the management benefit of P.massoniana can be greatly raised.
     60个材积大于群体平均值15.0%的优良家系,利用其亲本无性系开展杂交育种工作; 34个材积大于群体平均值25.0%的优良家系,可以直接在一代种子园中进行单系采种、造林,提高马尾松的经营效益。
短句来源
     The volume index is used to be the yielding ability measure to evaluate the family productivity level. Among 105 families tested,22 families whose volume increases by 15% over the population average and 7 excellent families whose volume in creases by 25% over the population average have been selected to use for various breeding work so as to raise the management benefit of C.
     利用材积指标作为丰产性测度对杉木半同胞家系的生产力水平进行评价 ,从参试的 10 5个家系中评选出 2 2个材积大于群体平均值 15 %的家系 ,可作为高世代种子园的建园材料 ; 7个材积大于群体平均值 2 5 %的家系可作为进一步探讨无性繁殖材料 ,以提高杉木的经营效益
短句来源
     The breeding value of adjusted back-fat thickness of boar was estimated by four methods,using individual performance data of 1 443 boars at Hangzhou Swine Breeding Farm in 2000-2002.The value of two times of the difference between the mean of the sires including more than 25 performance tested progeny and the population average in the same period is termed as the realized breeding value of the boar.
     取杭州市种猪试验场2000—2002年共1443头长白猪个体性能测定资料,用4种方法估测了90kg体重校正背膘厚估计上代亲本公猪的育种值,其中用25头以上后裔平均值与同期群体平均值之差的2倍定义为现实育种值。
短句来源
  总体平均数
     Random samples with different capacities of 5 traits in 4 cross-combinations were taken out to make comparison of the averages and variances of samples with those of the population composed of 240 seedlings,and to indicate that at least 170 seedlings were used to reflect the population average and variances in all 5 investigated traits at the level of α=5%and K=10%on the basis of incredible regions.
     通过抽取4个组合5个性状(株高、茎径、茎数、锤度和丛重)不同容量的随机样本,比较其统计平均数和方差与240株所构成的总体平均数和方差的差异.以置信区间为基础,估算α=5%,K=10%的水平下,至少需要170株实生苗的样本容量才能较准确地反映出所有性状的平均数和方差.
短句来源
  “population average”译为未确定词的双语例句
     the population average inbreeding coefficient were 0.115 2, 0.091 3. All these indicate that genetic diversity of Hezuo pig and Diqing pig are high, but their inbreeding degree are low.
     估计的群体平均近交系数分别为0.115 2,0.091 3。 表明合作猪和迪庆猪遗传多样性高,近交程度低。
短句来源
     According to the epidemiological study, incidence of cerebrovascular disease is about140-200/100000 population, average death rate is 140-200/100000 population.
     据流行病学调查得知,全世界范围内脑血管疾病的发病率为140-200/10 万人口,其平均死亡率为 100/10 万人口。
短句来源
     Mortality of tuberculosis was 190/100 000 population average year and the highest was 1 292/100 000 in 2003;
     2.1993~2004年间全村死亡35人,其中因结核病死亡13人,占总死亡人数的37.1%,平均年结核病死亡率高达190/10万,2003年高达1292/10万;
短句来源
     According to the epidemiological study,incidence of cerebrovascular disease is about 140-200/100000 population,average death rate is 100/100000 population.
     据流行病学调查得知,全世界范围内脑血管疾病的发病率为140-200/ 10万人口,其平均死亡率为100/10万人口。
短句来源
     The linkage map of chromsome 4 and 7 was constructed by using CRIMAP software. In this population, average allele number was 3.6, average heterozygosity and polymorphic information content 0.531 and 0.463, average information meiosis 235. The genetic length of sex-average, female and male maps were 178.5, 197.7 and 172.2 cM for chromosome 4, and 179.1, 195.7 and 167.7 cM for chromosome 7 respectively.
     在这-群体中,15个微卫星位点的平均等位基因数为3.6个,平均杂合度和平均多态信息含量分别为0.531和0.463,平均有信息减数分裂数为235。 研究所构建的4号染色体两性平均连锁图谱全长为178.5cM,位点间的平均间距为29.9cM,公、母猪连锁图谱全长分别为172.2cM和197.7cM;
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  相似匹配句对
     in average;
     平均为0.89d。
短句来源
     The Average Educational Level of Chinese Old Population
     中国老年人口的受教育水平
短句来源
     INVESTIGATION OF POPULATION INVERSIONS BY AVERAGE ATOM MODEL
     用平均原子模型研究粒子数反转
短句来源
     (2) The average I.
     2.恶性肿瘤非缓解期I.
短句来源
     In small population?
     大群体中则稳定下降、波动较小。
短句来源
查询“population average”译词为用户自定义的双语例句

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  population average
This approach is particularly useful if a covariate's population average effect is of primary interest and the correlation structure is not of interest or cannot be appropriately specified due to lack of sufficient information.
      
In all cases, the exchange between free and complexed crowns was fast on the NMR time scale and only a single population average 1H signal was observed.
      
In all cases the exchange between the free and complexed lithium ion was fast on the NMR time scale, and a single, population average, resonance was observed.
      
Our model estimated the population average baseline pain score in men to be lower than that in women (68 vs.
      
However, in all the subpopulations with decreasedCL, the model performed better than theNP; the more theCL differed from the population average, the better the performance.
      
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In the experiment,based on blank test with corn on 20 mu of land and test with different methods of sampling,the problem of field estima- tion of corn yield for large area was studied and probed.The paper cites the theoretical basis and procedures for typical mode sampling provided by late Professor Tan Qidong.Tests showed that the average yield per mu obtained by typical mode sampling was more close to the average yield per mu actually measured in blank test than that obtained by random sampling. Judging by...

In the experiment,based on blank test with corn on 20 mu of land and test with different methods of sampling,the problem of field estima- tion of corn yield for large area was studied and probed.The paper cites the theoretical basis and procedures for typical mode sampling provided by late Professor Tan Qidong.Tests showed that the average yield per mu obtained by typical mode sampling was more close to the average yield per mu actually measured in blank test than that obtained by random sampling. Judging by the 95% confidence range of the population average per mu yield,typical sampling is more accurate than random sampling.Even when the results under the two sampling systems were similar,typical mode sam- pling saved substantially cost and labor(by 2/5)and time(by 17/20)over random sampling.The paper notes that statistical estimation and analysis showed the error involved in typical sampling was smaller than that in ran- dom sampling of the same volume,and that typical sampling was the one that could best represent the population.Finally,the paper emphasizes the necessity for typical sampling and envisages in the light of the character- istic features of farm production measures for further improvement of the method.

本研究结合近20亩玉米空白试验,通过不同抽样方法,进行了玉米大面积田间测产的研究与探讨。本文引述了已故谭启栋教授提出的典型众数抽样的理论依据和方法步骤。这一方法不仅在林业上适用,而且在农业方面起到同样作用。试验结果表明,典型众数抽样较同时同地进行的随机抽样平均亩产量更接近空白试验所测得的每亩平均产量。从亩产总体平均值95%的置信范围看,典型众数抽样亦较之随机抽样为精确。即使两种抽样方法结果相近似,但典型众数抽样在布点、经费、人力及时间等方面比随机抽样为少,仅及随机抽样的3/5与3/20。本文通过统计估计与分析阐述了典型抽样的误差小于同大小的随机抽样,且是最能代表总体的抽样。最后论述了典型抽样的必要性,并且结合农业生产的特点,提出了改进这一方法的设想。

The grasshoppers are the most dangerous insect pests that do Nreat damage to forage on the meadows in Dahe area.A survey was made on thirty one species of grasshoppers belonging to seventeen genera and five families. The work mainly deals with their composition, distribution, population density in habitats and ecotope.In accordance with geographical features, climate and vegetation, the investigated areamaybe divided into four types: mountain wilderness grassland, mountain grassland, alpine and subalpine grassland...

The grasshoppers are the most dangerous insect pests that do Nreat damage to forage on the meadows in Dahe area.A survey was made on thirty one species of grasshoppers belonging to seventeen genera and five families. The work mainly deals with their composition, distribution, population density in habitats and ecotope.In accordance with geographical features, climate and vegetation, the investigated areamaybe divided into four types: mountain wilderness grassland, mountain grassland, alpine and subalpine grassland and alpine shrub.In above-mentioned habitats grasshoppers species and their percentage are 7, 61.3%; 27, 87.1%; 7, 22.6%; 3, 4.7% respectively.There are more species and greater number of grasshoppers in mountain grassland.The population average density is 7.7 in./m~2, while that on mountain wilderness grassland is 4,2 in./m~2 The preponderant species are Chorthippus dubius (Zub.), Myrmeleotettix palpalis (Zub.) and chorthippus brunneus (Thunb.).

本文通过对肃南县大河地区草原蝗虫的调查,着重讨论了该地区各种蝗虫在不同生境类型中的种类组成、分布特点、虫口密度及生态类型,以供草原蝗虫防治工作和有关方面参考。

This work was carried out at Haibei Research Station of Alpine Meadow Ecosystem, Menyuan County, Qinghai from April to October in 1982. The materials for study Were collected in three phenological periods of vegetation: green up, exuberance and withering. The results for polecat (Mustela eversmanni) are as follows:1. The daily food consumption (fresh wt) for polecat averages 0.404 g/g body wt. in the whole green up period, but 0.351 g/g body wt. in all three phenological periods. The daily food consumption...

This work was carried out at Haibei Research Station of Alpine Meadow Ecosystem, Menyuan County, Qinghai from April to October in 1982. The materials for study Were collected in three phenological periods of vegetation: green up, exuberance and withering. The results for polecat (Mustela eversmanni) are as follows:1. The daily food consumption (fresh wt) for polecat averages 0.404 g/g body wt. in the whole green up period, but 0.351 g/g body wt. in all three phenological periods. The daily food consumption (dry matter) averages 0.125g/g body wt. in all three phenological periods, but 0.145 g/g body wt./day in the green up period (Table 1).2. The egested faeces (dry matter) are higher in the green up period, and average 0.023 g/g body wt.. The excreted urine averages 0.117 g(liquid wt.)/g body wt./day in all three phenological periods, but 0.134 gdiquid wt.)/g body wt./day in the exuberance period.3. In all three phenological periods, the daily energy intake by the population averages 0.709 kcal/g body wt., the energy of the excreted faeces averages 0.102 kcal/g body wt./day, the energy of the excreted urine averages 0.38 kcal /g body wt./day,the daily digestibility and assimilation rates average 85.42%and 80.18% respectively (Table 3). The energy levels of both intake and assimilation by the population are higher in the green up period.4. The energy intake by the population is 1.157×105 kcal/ha./yr.. The energy cost by the population is 0.240×105 kcal/ha./yr. The energy flow through the population is 0.917×105 kcal/ha./yr. (Table 5). So far as we know, the energy flow through the population is very small.

动物种群能流的研究具有重要的意义。为阐明食肉动物与食草动物能量的相互关系,我们于1982年4—10月在青海省门源县海北高寒草甸生态系统定位站地区,测定了艾虎对食物的消化率和同化率,同时统计其密度,初步估计通过其种群的能量流。 艾虎全年平均摄入干物质为0.125克/克体重/日;摄入总能为0.709大卡/克体重/日,同化能、粪便和尿的排出能分别占其80.18%、14.58%和5.25%。全年摄入能为1.157×10~5大卡/公顷,通过种群能流为0.917×10~5大卡/公顷/年。 上述结果表明,通过艾虎种群的能量流是比较少的。因此,保护艾虎,增加其数量,是高寒草甸生态系统改造的任务之一。

 
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