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约束最大似然
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  restricted maximum likelihood
     Vrarance and covarance components were estimated by a restricted maximum likelihood (REML)approach for the 6 traits, and heritability estimates of which were 0.24, 0.215, 0.29,0.48 and 0.36 resp.
     用约束最大似然估计法(REML:Restricted maximum likelihood)估计方差组分,得到以上6性状的遗传力分别为0.24,0.215,0.29,0.48和0.36。
短句来源
     Genetic analysis was carried out on reproduction traits in large white sows both in Zhenghong and Yinong swine breeding farm in Hunan Province. Multiple traits derivative free Restricted maximum likelihood(MTDFREML) were used to estimate 7 736 records from the year of 1998 to 2004,including total number born(TNB),number born alive(NBA),litter weight born(LWB) and litter weight of 21 days(LW21).
     运用多性状非求导约束最大似然法(multiple traits derivative free restricted maximum likelihood,MTDFREML),对湖南正虹种猪场和益阳市农科所种猪场(益农种猪场)大白母猪1998-2004年的共7 736胎次的繁殖性状育种记录进行遗传参数估计.
短句来源
     The study analyzed the non-genetic factors influencing the main traits of Aohan Merino Sheep, selected different models and estimated variance components and genetic parameters of twelve traits using animal model Best Linear Unbiased Prediction(BLUP) and Multiple Trait Derivative-Free Restricted Maximum Likelihood(MTDFREML).
     本研究对敖汉细毛羊主要性状的非遗传因素进行分析,采用动物模型最佳线性无偏预测(BLUP)和多性状非求导约束最大似然法(MTDFREML)对不同模型进行比较研究,估计了12个主要性状的方差组分、遗传参数和育种值。
短句来源
     Eight simulated data sets are generated by Monte Carlo simulation to compare the relative accuracy of methods for estimating variance components. These methods selected are Analysis of variance ( ANOVA ) which does not take the fixed herd-year-season effects into account, Henderson method 1 , Henderson method 3, Maximum Likelihood ( ML ) , Modified Maximum Likelihood(MOML ) and Restricted Maximum Likelihood ( REML ) .
     本文通过蒙特卡罗模拟产生的八个模拟资料比较了我国常用的方差分析法(不考虑场年季效应)、Henderson方法1、Henderson方法3、最大似然法、改进最大似然法与约束最大似然法。
短句来源
     A random regression model with Legendre polynomials of age as independent variables was used to estimate the covariance functions by restricted maximum likelihood employing the average information algorithm (AIREML).
     配合将年龄的勒让德多项式作为自变量的随机回归模型 ,用平均信息约束最大似然 (AIREML)法估计。
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  “约束最大似然”译为未确定词的双语例句
     The direct genetic effects and the maternal genetic effects of economic traits in new dam line(D Ⅵ)pigs of China were estimated by DFREML.
     用非求导约束最大似然法 (DFREML)估计了DⅥ系猪经济性状的直接遗传效应和母体遗传效应。
短句来源
     Based on the sequence data of 1660 and 2326 molecular markers, blastn software were used to search identical sequences on internet chicken genomic DNA database and some useful bionformations were derived.
     2、首次应用单元内全同胞组内相关法,混合模型约束最大似然估计法(REML)估计的新扬州鸡0、2、4、6、8周龄体重性状的遗传力,除初生重外,其值在0.3-0.4之间,属中等遗传力,适合与体重关联的分子遗传标记的检出,同时也有利于分子标记辅助选择。
短句来源
     The simulation results indicate that the estimates of REML are most accurate and the estimates of ANOVA are most biased, compared with those of the other methods.
     结果表明:方差分析法估计值偏差最大,而约束最大似然法的估计值最准确。
短句来源
     Genetic parameter were estimated for teat number of Danish Landrace by using Gibbs sampling.
     建立了单性状动物模型通过 Gibbs抽样对丹系长白猪乳头数遗传参数进行贝叶斯 (Bayesian)估计 ,并与约束最大似然 (REML)估计进行比较。
短句来源
     The differences between different models were tested by likelihood ratio test.
     利用MTDFREML程序采用非求导约束最大似然法 (DFREML)估计各模型中的方差组分 ,用似然比检验对不同模型的差异进行检验。
短句来源
  相似匹配句对
     An Algorithm of Maximum Likelihood Estimation under Partial Restriction
     序约束似然估计的迭代算法
短句来源
     Maximum Likelihood Model Of Diagnosing Intestinal Obstruction
     肠梗阻诊断的似然模型
短句来源
     THE LAW OF THE ITERATED LOGARITHM FOR THE MAXIMUM LIKELIHOOD ESTIMATES
     似然估计的重对数律
短句来源
     NON-COHERENT MAXIMUM-LIKELIHOOD ESTIMATION DETECTION OF GMSK SYSTEM
     GMSK的非相干似然检测
短句来源
     The law of iterated logarithms of maximum likelihood estimate
     似然估计的重对数律
短句来源
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  restricted maximum likelihood
WOMBAT-A tool for mixed model analyses in quantitative genetics by restricted maximum likelihood (REML)
      
WOMBAT is a software package for quantitative genetic analyses of continuous traits, fitting a linear, mixed model; estimates of covariance components and the resulting genetic parameters are obtained by restricted maximum likelihood.
      
In comparing the mean proportions for different levels of a factor, such as time of day, the method uses restricted maximum likelihood (REML), an algorithm which can account for the sampling variance as well as for missing data.
      
Restricted maximum likelihood estimation of heterogeneous variances and covariances via the expectation-maximization algorithm is presented.
      
Estimates were obtained by restricted maximum likelihood (REML) computed under a derivative free algorithm (DFREML).
      
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Eight simulated data sets are generated by Monte Carlo simulation to compare the relative accuracy of methods for estimating variance components. These methods selected are Analysis of variance ( ANOVA ) which does not take the fixed herd-year-season effects into account, Henderson method 1 , Henderson method 3, Maximum Likelihood ( ML ) , Modified Maximum Likelihood(MOML ) and Restricted Maximum Likelihood ( REML ) . The simulation results indicate that the estimates of REML are most accurate and the estimates...

Eight simulated data sets are generated by Monte Carlo simulation to compare the relative accuracy of methods for estimating variance components. These methods selected are Analysis of variance ( ANOVA ) which does not take the fixed herd-year-season effects into account, Henderson method 1 , Henderson method 3, Maximum Likelihood ( ML ) , Modified Maximum Likelihood(MOML ) and Restricted Maximum Likelihood ( REML ) . The simulation results indicate that the estimates of REML are most accurate and the estimates of ANOVA are most biased, compared with those of the other methods.

本文通过蒙特卡罗模拟产生的八个模拟资料比较了我国常用的方差分析法(不考虑场年季效应)、Henderson方法1、Henderson方法3、最大似然法、改进最大似然法与约束最大似然法。结果表明:方差分析法估计值偏差最大,而约束最大似然法的估计值最准确。

Single and multiple trait BLUP estimates were obterned from 13 Qinchuan bulls for birth weight, weaning weight, daily weight gain, height at withers, body length and heart girth using the best linear unbiased prediction method ( BLUP). Vrarance and covarance components were estimated by a restricted maximum likelihood (REML)approach for the 6 traits, and heritability estimates of which were 0.24, 0.215, 0.29,0.48 and 0.36 resp. The genectic trends of the 6 traits during the 10 years were calculated from the...

Single and multiple trait BLUP estimates were obterned from 13 Qinchuan bulls for birth weight, weaning weight, daily weight gain, height at withers, body length and heart girth using the best linear unbiased prediction method ( BLUP). Vrarance and covarance components were estimated by a restricted maximum likelihood (REML)approach for the 6 traits, and heritability estimates of which were 0.24, 0.215, 0.29,0.48 and 0.36 resp. The genectic trends of the 6 traits during the 10 years were calculated from the regression of the weighted average transmitting ability (WATA) on time series, which averaged 0.1859, 0.04364, 1.74 (kg/yr) and 0.2304, 0.231 and 0.1716 (cm/yr) resp. The problems of rationality for bull utilization were discussed. The study showed that the BLUP method was suitable and effective in selecting Qinchuan bulls.

以最佳线性无偏预测法(BIUP:Best Linear unbiased prediction)估测了13头秦川种公牛的初生重、断奶重、日增重、体高、胸围、体斜长6性状的育种值和复合育种值。用约束最大似然估计法(REML:Restricted maximum likelihood)估计方差组分,得到以上6性状的遗传力分别为0.24,0.215,0.29,0.48和0.36。由公牛加权平均传递力(WATA,weight average transmitting ability)对时间序列的回归估计群体的年平均遗传进展分别为0.1859,0.0436,1.74(kg/yr)和0.2304,0.231,0.1761(cm/yr)。分析了以往种公牛利用的合理性问题。研究表明用BIUP法选择秦川公牛是适用和有效的。

Components of variance for sire, litter nested within sire andresidual effects were estimated by restricted maximum likelihood(REML)for multifoetal animal. The age in days at 105kg of body weight(D105)and average backfat thickness (ABF) of swine was taken for example.Both D105 and ABF were adjusted to a 105kg basis. A mixed modelincluding the fixed effects of birth-year-month(BYM), sex of the pig andparity of the dam(gilt vs. sow) was used for estimating components ofvariance. Random effects in the model were...

Components of variance for sire, litter nested within sire andresidual effects were estimated by restricted maximum likelihood(REML)for multifoetal animal. The age in days at 105kg of body weight(D105)and average backfat thickness (ABF) of swine was taken for example.Both D105 and ABF were adjusted to a 105kg basis. A mixed modelincluding the fixed effects of birth-year-month(BYM), sex of the pig andparity of the dam(gilt vs. sow) was used for estimating components ofvariance. Random effects in the model were sire, litter nested withinBYM and sire, and residual error. REML was used to estimate thecomponents of variance for sire , litter nested within BYM and sire, and residual error, with the assumption that each random effect within these sources of variance was distributed independently andidentically, i. e, var(s)=Iσ_s~2 var(I)=Iσ_i~2, var(e)=Iσ_e~2, with no co-variances among the radom effects, i.e. cov=0, coy=0,coy =O.Heritability(h~2) and common envirnmental effect of litter-mates (c~2) were estimated as h~2=respectively.

本文研究对于多胎动物利用约束最大似然法(REML)估计父畜、父内窝间和剩余误差的方差组分。以猪达到105公斤体重的日龄(D105)和背膘厚度(ABF)为例,把D105和ABF的记录都调整到以105公斤为基础。采用的混合模型包括出生一年一月(BYM)、猪的性别和母猪产次的固定效应,随机效应是父畜、BYM和父畜内的窝及剩余误差。利用REML来估计父畜的方差组分(0 0,BYM和父畜内的窝方差组分和剩余误差。假定这些方差来源内的每个随机效应相互独立和同一分布,即Var=Iσ_s~2,VasIσ_1~2Var(e)=Iσ_e~2;随机效应间不存在协方差,即COV=0,Cov=0,COV=0。遗传力(h~2)和同窝小猪的共同环境效应(C~2)的估值分别按=和=计算。 C

 
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