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2019年女篮亚洲杯参赛球队位置效率值统计与分析
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作者 任明霞 李君璞 《山东体育科技》 2020年第2期37-40,共4页
运用文献资料、数理统计等方法,以亚洲杯女篮8支队伍为研究对象,将亚洲女篮后卫、前锋、中锋的技术统计和位置效率值与中国队比较,结果得出:1)中国女篮身高和年龄优势明显,但多项技术运用能力和效率值与日本、澳大利亚等队相比存在差距... 运用文献资料、数理统计等方法,以亚洲杯女篮8支队伍为研究对象,将亚洲女篮后卫、前锋、中锋的技术统计和位置效率值与中国队比较,结果得出:1)中国女篮身高和年龄优势明显,但多项技术运用能力和效率值与日本、澳大利亚等队相比存在差距;2)中国队3个位置的效率值分别为后卫21.22,前锋27.89,均列第2位,中锋26.67,列第1位。结论:中国女篮的优势是身材高、年龄小,前锋位置效率值较高;劣势是后卫效率值低,球队竞技状态不稳定。建议:强化训练各位置的核心技术,有针对性地与欧美强队对抗,丰富大赛经验。 展开更多
关键词 亚洲女篮 位置效率值 后卫 前锋 中锋
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Restricted normal mixture QMLE for non-stationary TGARCH(1,1) models 被引量:3
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作者 WANG Hui PAN JiaZhu 《Science China Mathematics》 SCIE 2014年第7期1341-1360,共20页
The threshold GARCH(TGARCH)models have been very useful for analyzing asymmetric volatilities arising from financial time series.Most research on TGARCH has been directed to the stationary case.This paper studies the ... The threshold GARCH(TGARCH)models have been very useful for analyzing asymmetric volatilities arising from financial time series.Most research on TGARCH has been directed to the stationary case.This paper studies the estimation of non-stationary first order TGARCH models.Restricted normal mixture quasi-maximum likelihood estimation(NM-QMLE)for non-stationary TGARCH models is proposed in the sense that we estimate the other parameters with any fixed location parameter.We show that the proposed estimators(except location parameter)are consistent and asymptotically normal under mild regular conditions.The impact of relative leptokursis and skewness of the innovations’distribution and quasi-likelihood distributions on the asymptotic efficiency has been discussed.Numerical results lend further support to our theoretical results.Finally,an illustrated real example is presented. 展开更多
关键词 non-stationary TGARCH normal mixture QMLE CONSISTENCY asymptotic normality efficiency
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