| 方差组分估计方法的比较 |
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| 引用本文： | 刘增廷,张沅.方差组分估计方法的比较[J].畜牧兽医学报,1989,20(4):289-294. |
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| 作者姓名： | 刘增廷 张沅 |
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| 作者单位： | 北京农业大学
(刘增廷，张沅)，北京农业大学(解春亭) |
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| 摘 要： | 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。
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| 关 键 词： | 方差组分 蒙特卡罗模拟 混合模型 |
COMPARISON OF METHODS FOR ESTIMATING VARIANCE COMPONENTS |
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| Liu Zengting,Zhang Yuan,Xie Chunting.COMPARISON OF METHODS FOR ESTIMATING VARIANCE COMPONENTS[J].Acta Veterinaria et Zootechnica Sinica,1989,20(4):289-294. |
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| Authors: | Liu Zengting Zhang Yuan Xie Chunting |
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| Institution: | Beijing Agricultural University |
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| Abstract: | 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. |
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| Keywords: | Variance components Monte carlo simulation Mixed model |
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