检索结果-南通市图书馆

On Moments of the Maximum of Partial Sums of Moving Average Processes under Dependence Assumptions

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2011年第4期27卷 691-696页

作者： Xing-cai ZHOU jin-guan lin Department of Mathematics Southeast University Nanjing 210096 China Department of Mathematics and Computer Science Tongling University Tongling 244000 China

Let{Yi;-∞〈i〈∞}be a doubly infinite sequence of identically distributed φ-mixing random variables and let{ai;-∞〈i〈∞}be an absolutely summable sequence of real numbers. In this paper we study the moments of su... 详细信息

关键词： Moving average φ-mixing Moments

Score Tests for Zero-inflated Double Poisson Regression Models

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2017年第4期33卷 851-864页

作者： Feng-chang XIE jin-guan lin Bo-cheng WEI School of Mathematical Sciences Nanjing Normal University Department of Statistics Nanjing Audit University Department of Mathematics Southeast University

Count data with excess zeros encountered in many applications often exhibit extra variation. There- fore, zero-inflated Poisson （ZIP） model may fail to fit such data. In this paper, a zero-inflated double Poisson model （ZIDP）, which is generalization of the ZIP model, is studied and the score tests for the significance of dis- persion and zero-inflation in ZIDP model are developed. Meanwhile, this work also develops homogeneous tests for dispersion and/or zero-inflation parameter, and corresponding score test statistics are obtained. One numer- ical example is given to illustrate our methodology and the properties of score test statistics are investigated through Monte Carlo simulations.

关键词： double Poisson zero-inflation dispersion score test test of homogeneity

Matrix Image Method for Ranking Nonregular Fractional Factorial Designs

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2018年第4期34卷 742-751页

作者： Xue-ping CHEN jin-guan lin Xuan-qing CHEN Xiao-di WANG Department of Statistics Jiangsu University of Technology Changzhou 213001 China Department of Statistics Nanjing Audit University Nanjing 211815 China School of Statistics and Mathematics Central University of Finance and Economics Beijing 100081 China

Nonregular fractional factorial designs such as Plackett-Burman designs and other orthogonal arrays are widely used in various screening experiments for their run size economy and flexibility. In this paper,we study matrix image theory and present a new method for distinguishing and assessing nonregular designs with complex alias structure, which works for all symmetrical and asymmetrical, regular and nonregular orthogonal arrays. Based on the matrix image theory, our proposed method captures orthogonality and projection properties. Empirical studies show that the proposed method has a more precise differentiation capacity when comparing with some other criteria.

关键词： generalized minimum aberration Bayes matrix image partial aliasing

Complete q-Moment Convergence of Moving Average Processes under -mixing Assumption

在线全文

学校读者我要写书评

暂无评论

Journal of Mathematical Research and Exposition 2011年第4期31卷 687-697页

作者： Xing Cai ZHOU jin guan lin Department of Mathematics Southeast University Jiangsu 210096 P. R. China Department of Mathematics and Computer Science Tongling University Anhui 244000 P. R. China

In this paper, we study the complete q-moment convergence of moving average processes under v-mixing assumption. The results obtained not only extend some previous known results, but also improve them.

关键词： moving average φ-mixing complete moment convergence.

在线全文

学校读者我要写书评

暂无评论

惯性混合投影法求解分裂公共不动点问题

数学学报（中文版） 2024年第3期67卷 511-520页

作者：管金林唐艳重庆工商大学数学与统计学院重庆400067 经济社会应用统计重庆市重点实验室重庆400067

本文主要在Hilbert空间中研究一个求解关于多值半压缩映射的分裂公共不动点问题的修正算法,在适当的条件下,我们运用惯性和混合投影技术证明了该算法的强收敛性.最后给出本算法的相关应用及数值实验说明算法的有效性.本文结果改进和推... 详细信息

本文主要在Hilbert空间中研究一个求解关于多值半压缩映射的分裂公共不动点问题的修正算法,在适当的条件下,我们运用惯性和混合投影技术证明了该算法的强收敛性.最后给出本算法的相关应用及数值实验说明算法的有效性.本文结果改进和推广了已有文献的相关结果.

关键词：惯性技术分裂公共不动点问题混合投影技术 Hilbert空间

Banach空间中三步隐式中点法则算法的研究及应用

在线全文

学校读者我要写书评

暂无评论

数学学报（中文版） 2023年第5期66卷 971-980页

作者：管金林唐艳重庆工商大学数学与统计学院重庆400067 经济社会应用统计重庆市重点实验室重庆400067

本文在实一致光滑的Banach空间中构造一个非扩张映射的三步隐式中点法则的迭代算法,在适当的条件下,证明了该算法强收敛于三个非扩张映射的不动点与凸优化问题的公共解,并给出本算法在分裂可行问题中的应用.本文结果改进和推广了已有文... 详细信息

本文在实一致光滑的Banach空间中构造一个非扩张映射的三步隐式中点法则的迭代算法,在适当的条件下,证明了该算法强收敛于三个非扩张映射的不动点与凸优化问题的公共解,并给出本算法在分裂可行问题中的应用.本文结果改进和推广了已有文献的相关结果.

关键词：迭代算法三步隐式中点法则非扩张映射不动点 Banach空间

CaH2-promoted activity of Ni-carbonate interface for CO2 methanation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 522-532页

作者： jin-Peng Wang Guo-Cui Mao Hui-lin Jiang Bao-Xia Dong Yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of CaH2in Ni/CaCO3enhances the CO2methanation activity of the *** CO2conversion for Ni/CaH2-CaCO3reached 68.5%at 400°C,which was much higher than that of the Ni/CaCO3（31.6%） and Ni/CaH2-CaO （42.4%） ***,the Ni/CaH2-CaCO3catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH2played a crucial role in promoting the activity of the Ni-carbonate interface for ***2could modify the electronic structure of Ni and tune the structural properties of CaCO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that CO2activation occurs at the hydroxyl group （OH） on the CaH2-modified Ni-carbonate surface,leading to the formation of CO3H****,our study has confirmed that CO2methanation over the Ni/CaH2-CaCO3catalysts proceeds via the formate pathway.

关键词： CO 2 methanation Metal hydride Ni catalysts Carbonate Metal-carbonate interface

我国花样滑冰男子单人滑运动员冬奥会成绩突破的对策——以2019世界花样滑冰锦标赛节目内容得分为例

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

冰雪运动 2021年第1期43卷 4-7页

作者：关金林黑龙江省冰上训练中心黑龙江哈尔滨150001

研究男子单人滑运动员节目内容的难度,选择与其自身表演风格相符的节奏和音乐进行创作编排等技巧,分析每个人不同的滑行特点并进行不同的基础滑行方面的练习,为我国优秀花滑运动员取得更优异的比赛成绩和更有效的训练提供科学的理论依... 详细信息

研究男子单人滑运动员节目内容的难度,选择与其自身表演风格相符的节奏和音乐进行创作编排等技巧,分析每个人不同的滑行特点并进行不同的基础滑行方面的练习,为我国优秀花滑运动员取得更优异的比赛成绩和更有效的训练提供科学的理论依据。运用文献资料法、录像分析法、数理统计法和逻辑分析法,分析我国运动员在难度技术动作方面的等级与分数,与国际顶尖优秀男子单人滑运动员的技术动作难度及分数旗鼓相当,甚至略胜一筹。但在节目内容分上却有着显著的差异,因此节目内容分五大项分数的差异成为了制约我国优秀运动员在大赛中夺得更好名次的主要原因;其次在技术动作之间步法连接难度和质量、表演与完成方面的艺术表现力也亟待提高。

关键词：花样滑冰男子单人滑节目内容选择编排

Thickness and sp3 bond modulation of（Ti/tetrahedral amorphous carbon）_n multilayer coatings

在线全文

学校读者我要写书评

暂无评论

Tungsten 2025年第1期7卷 152-160页

作者： Zhi-Jun Xie Jia-lin Li ling Gong Xiang-Li Zhong Hong-Jia Song jin-Bin Wang National-Provincial Laboratory of Special Function Thin Film Materials School of Materials Science and Engineering Xiangtan University

The durability of wear-resistant tetrahedral amorphous carbon（ta-C） coatings is intimately linked to their thickness and the concentration of *** enhance the lifespan of the coatings,we have prepared a multilayer coating consisting of alternating layers of Ti and ta-C,denoted as（Ti/ta-C）_n,using arc ion plating.A multi-layer structure in conjunction with stage cooling is employed to enhance the thickness and promote *** results indicate that the ID/IGvalue,representing the ratio of the intensity of the D peak to that of the G peak in Raman spectroscopy,decreases from 0.85 when no stage cooling is applied to 0.35 when stage cooling is employed,suggesting an enhancement in the fraction of sp3bonds within the *** obtained（Ti/ta-C）_n multilayer coating without peeling off has a maximum thickness of 1.14 μm,which is almost double that of the ta-C coating single layer *** the same time,the coating has a low coefficient of friction,down to 0.069,and maintains excellent friction properties with a wear rate of 3.4×10-6mm3·N-1·*** results conclusively show that the preparation technology can enhance both thickness and sp3bonding in ta-C coatings,significantly expanding their utility across tools,molds,and precision engineering components.

关键词： Arc ion plating Multilayer structure sp3 bond Ta-C coating Wear resistance