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湿地松人工林直径分布收获模型的研究 被引量:1
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作者 魏柏松 邱水文 《江西林业科技》 1995年第6期1-3,共3页
本文在湿地松人工林直径分布遵从三参数Weibull分布的基础上,建立了湿地松人工林直径分布收获模型。该模型采用参数回收法(PRM),即采用林分因子的预估值来回收Weibull分布的参数,保证了收获模型与林分回归模型的... 本文在湿地松人工林直径分布遵从三参数Weibull分布的基础上,建立了湿地松人工林直径分布收获模型。该模型采用参数回收法(PRM),即采用林分因子的预估值来回收Weibull分布的参数,保证了收获模型与林分回归模型的一致性。该模型不仅能输出林分的总体收获量,而且能输出各径阶的收获量。误差检验结果表明该模型使用精度较高。 展开更多
关键词 湿地松 收获模型 参数回收模型 直径分布
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Convergence Rates of Wavelet Estimators in Semiparametric Regression Models Under NA Samples 被引量:9
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作者 Hongchang HU Li WU 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2012年第4期609-624,共16页
Consider the following heteroscedastic semiparametric regression model:where {Xi, 1 〈 i 〈 n} are random design points, errors {ei, 1 〈 i 〈 n} are negatively associated (NA) random variables, (r2 = h(ui), and... Consider the following heteroscedastic semiparametric regression model:where {Xi, 1 〈 i 〈 n} are random design points, errors {ei, 1 〈 i 〈 n} are negatively associated (NA) random variables, (r2 = h(ui), and {ui} and {ti} are two nonrandom sequences on [0, 1]. Some wavelet estimators of the parametric component β, the non- parametric component g(t) and the variance function h(u) are given. Under some general conditions, the strong convergence rate of these wavelet estimators is O(n- 1 log n). Hence our results are extensions of those re, sults on independent random error settings. 展开更多
关键词 Semiparametric regression model Wavelet estimate Negativelyassociated random error Strong convergence rate
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Some uniform convergence results for kernel estimators
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作者 MENG MeiXia AI ChunRong 《Science China Mathematics》 SCIE 2013年第9期1945-1956,共12页
This paper derives some uniform convergence rates for kernel regression of some index functions that may depend on infinite dimensional parameter. The rates of convergence are computed for independent, strongly mixing... This paper derives some uniform convergence rates for kernel regression of some index functions that may depend on infinite dimensional parameter. The rates of convergence are computed for independent, strongly mixing and weakly dependent data respectively. These results extend the existing literature and are useful for the derivation of large sample properties of the estimators in some semiparametric and nonparametric models. 展开更多
关键词 uniform convergence kernel estimation convergence rate
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