| 线性矩法估计参数的保证修正值系数B的推求 |
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| 引用本文： | 刘攀,郭生练,胡安焱.线性矩法估计参数的保证修正值系数B的推求[J].水文,2006,26(6):27-29. |
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| 作者姓名： | 刘攀 郭生练 胡安焱 |
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| 作者单位： | 武汉大学,水资源与水电工程科学国家重点实验室,湖北,武汉,430072 |
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| 基金项目： | 水利部科技攻关项目;湖北省自然科学基金 |
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| 摘 要： | 在设计洪水的抽样误差估计中,采用保证修正值系数B方法估计均方差简单易用。应用线性矩法估计频率分布曲线的参数,有较好的无偏性和有效性,具有一定的应用前景。目前线性矩法的B值诺模图尚未确定,给用线性矩法确定参数时估计抽样误差带来了难度与不便。采用统计试验,分析了离差系数、偏态系数和样本长度对B值的影响,结果表明线性矩法估计参数时仍可采用保证修正值系数B值诺模图方法来估计抽样误差,并推求了不同偏态系数、设计频率情形下的B值,制成了线性矩法的B值诺模图备用。
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| 关 键 词： | 抽样误差 线性矩法 保证修正值系数 统计试验 |
| 文章编号： | 1000-0852（2006）06-0027-03 |
| 收稿时间： | 2005-12-14 |
| 修稿时间： | 2005-12-14 |
Deriving the B Nomogram of L-Moments Method to Estimate Sampling Errors of Design Floods |
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| LIU Pan,GUO Sheng-lian,HU An-yan.Deriving the B Nomogram of L-Moments Method to Estimate Sampling Errors of Design Floods[J].Hydrology,2006,26(6):27-29. |
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| Authors: | LIU Pan GUO Sheng-lian HU An-yan |
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| Affiliation: | State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China |
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| Abstract: | This paper was focused on deriving the B nomogram of L-moments method,which was used to estimate the sampling errors in frequency analysis.The design floods are always added its mean square deviation to ensure the projects safety.An approximate formula of B based on Monte Carlo experiments,named B nomogram,is often used to estimate the mean square deviation.The L-moments method for flood frequency analysis is very efficient,which has some applications,but the B nomogram for L-moments method isn't available now.Based on Monte Carlo experiments,the B nomogram of L-moments method has been developed and validated. |
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| Keywords: | sampling error L-moments method B nomogram Monte Carlo experiments |
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