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Journal of Systems Science & Complexity 2020年第5期33卷 1533-1544页

作者： xing guodong YANG Shanchao School of Mathematics and Statistics Hefei Normal UniversityHefei 230601China School of Mathematicsand Statistics Yulin Normal UniversityYulin 537000China School of Mathematics and Statistics Guangri Normnl UniversityGuilin 541004China

In the context of multivariate regular variation,the authors establish the first-order asymptotics of the spectral risk measure of portfolio ***,by the notion of second-order regular variation,the second-order asymptotics of the spectral risk measure of portfolio loss is also *** order to illustrate the derived results,a numerical example with Monte Carlo simulation is carried out.

关键词： Asymptotics multivariate regular variation regular variation second-order regular variation spectral risk measure value-at-risk

基于WOD序列风险度量VaR和CVaR估计的渐近性质

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应用数学学报 2024年第3期47卷 478-497页

作者：李永明罗中德李乃医邢国东上饶师范学院数学与计算科学学院上饶334001 百色学院数理科学与统计学院百色533000 广东海洋大学数学与计算机学院湛江524088 合肥师范学院数学与统计学院合肥230061

在WOD序列下分别考虑了风险价值VaR和条件风险价值CVaR的估计.研究了VaR样本分位数估计的Bahadur表示以及强相合性.同时,对条件风险价值CVaR估计的强相合性及其收敛速度进行研究,通过选取适当的参数其收敛速度接近于O(n-1/2).为了说明... 详细信息

在WOD序列下分别考虑了风险价值VaR和条件风险价值CVaR的估计.研究了VaR样本分位数估计的Bahadur表示以及强相合性.同时,对条件风险价值CVaR估计的强相合性及其收敛速度进行研究,通过选取适当的参数其收敛速度接近于O(n-1/2).为了说明所得的VaR和CVaR估计的理论结果,我们分别利用ARMA(1,1)模型和MA(1)模型产生的WOD随机数进行了数值模拟,通过VaR和CVaR相应的真实值和估计值曲线图对理论结果的有效性进行了验证.

关键词： WOD相依风险价值条件风险价值 Bahadur表示强相合性

Exponential Inequality for a Class of NOD Random Variables and Its Application

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Wuhan University Journal of Natural Sciences 2011年第1期16卷 7-10页

作者： xing guodong YANG Shanchao Department of Mathematics Hunan University of Scienceand Engineering Yongzhou 425100 Hunan China Department of Mathematics Guangxi Normal UniversityGuilin 541004 Guangxi China

In this paper,an exponential inequality for weighted sums of identically distributed NOD （negatively orthant dependent） random variables is established,by which we obtain the almost sure convergence rate of which reaches the available one for independent random variables in terms of Berstein type inequality. As application,we obtain the relevant exponential inequality for Priestley-Chao estimator of nonparametric regression estimate under NOD samples,from which the strong consistency rate is also obtained.

关键词： identically distributed NOD (negatively orthant dependent) random variables weighted sums exponential inequality almost sure convergence rate Priestley-Chao estimator

The Rate of Asymptotic Normality of Frequency Polygon Density Estimation for Spatial Random Fields

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Open Journal of Statistics 2018年第6期8卷 962-973页

作者： Shanchao Yang Xin Yang guodong xing Yongming Li School of Mathematics and Statistics Guangxi Normal University Guilin China Department of Mathematics Guilin University of Aerospace Technology Guilin China School of Mathematical Sciences Xiamen University Xiamen China School of Mathematics Shangrao Normal University Shangrao China

This paper is to investigate the convergence rate of asymptotic normality of frequency polygon estimation for density function under mixing random fields, which include strongly mixing condition and some weaker mixing conditions. A Berry-Esseen bound of frequency polygon is established and the convergence rates of asymptotic normality are derived. In particularly, for the optimal bin width , it is showed that the convergence rate of asymptotic normality reaches to ?when mixing coefficient tends to zero exponentially fast.

关键词： Frequency Polygon Berry-Esseen Bound Rate of Asymptotic Normality Mixing Random Field

Lutein-stevioside nanoparticle attenuates H_(2)O_(2)-induced oxidative damage in ARPE cells

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Food Science and Human Wellness 2024年第3期13卷 1628-1635页

作者： Zhuqing Dai Meimei Nie Ye Chen Jiangfeng Song Yayuan Xu Zhongyuan Zhang guodong Zhang Shumo Yan xing Zhang Dajing Li Institute of Agro-Product Processing Jiangsu Academy of Agricultural SciencesNanjing 210014China Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base Ministry of Science and TechnologyNanjing 210014China Jiangsu Aland Nutrition Co. Ltd.Taizhou 214500China Aland Nutrition Taizhou Co. Ltd.Taizhou 225300China

In order to improve the bioavailability of lutein(LUT),a novel lutein-stevio side nanoparticle(LUT-STE)were prepared previously,but the information about LUT-STE on protecting of eye health was *** study investigated the effect of LUT-STE on antioxidant activity of H_(2)O_(2)-induced human retinal pigment epithelial(ARPE)*** and LUT-STE(final concentration of 5μg/mL)significantly enhanced cell viability from(74.84±5.10)%to(81.92±10.01)%(LUT)and(89.33±4.34)%(LUT-STE),and inhibited the cell apoptosis(P<0.05).After pretreatment with LUT-STE in ARPE cells,the levels of superoxide dismutase(SOD),catalase(CAT)and glutathion peroxidase(GSH-Px)in ARPE cells were significantly increased(P<0.05),the contents of reactive oxygen species(ROS)and malondialdehyde(MDA)were *** addition,the vascular endothelial growth factor(VEGF)levels were inhibited by 13.61%and 17.39%,respectively,pretreatment with LUT and *** blotting results showed that the pretreatment with LUT-STE inhibited the expression of caspase-9 and caspase-3 and up-regulated Bcl-2/Bax pathway to inhibit H_(2)O_(2)-induced *** summary,the novel delivery LUT-STE had more pronounced inhibitory effect on H_(2)O_(2)-induced damage in human ARPE cells.

关键词： Lutein Stevioside Antioxidant Human retinal pigment epithelial cell Mechanism

Multi-function Research on Wetland Center for Chemical Industrial Park Water Reuse

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Journal of Environmental Science and Engineering(A) 2017年第2期6卷 53-59页

作者： Du Jianqiang Zhang Ying Huang guodong Shi Bo xing Beiyan Feng Tong Suzhou DeHua Ecological Technology Co. Ltd. Suzhou 215000 China

Widely application of CWs （Constructed Wetlands） in domestic wastewater treatment of China is developing wetlands into a multi-function wetland system. Wetland center in CAMIP （Changshu Advanced Materials Industrial Park）（Suzhou, Jiangsu Province, China） successfully improved tail water quality to level IV of Environment Quality Standards for Surface Water （GB3838-2002） by the combination of different CW steps and achieved water reuse in CAMIP for industrial purpose. Different from traditional tail water advanced treatment, wetland center is designed under the principle of combining landscape and ecological treatment technology. Since this center started running, the removal rate of TN （Total Nitrogen）, NH3-N, TP （Total Phosphorus） and COD （Chemical Oxygen Demand） reaches 87%, 91%, 44% and 60% respectively. Also, 2,038,000 m^3 industrial water reuse in 2015 and 2016 was achieved; emission reduction on COD, NH3-N and TN reached 100 t, 7.2 t and 15.2 t; an ecological garden that combines ecological wastewater treatment, wetland landscape, habitat renovation and educational functions was created.

关键词： Ecological wastewater treatment wetland landscape ecological restoration ecological education.

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负相协随机变量的指数不等式

数学物理学报（A辑） 2009年第6期29卷 1679-1688页

作者：邢国东杨善朝湖南科技学院数学系湖南永州425100 广西师范大学数学学院广西桂林541004

该文给出了一些负相协随机变量的指数不等式.这些不等式改进了由Jabbari和Azarnoosh及Oliveira所得到的相应的结果.利用这些不等式对协方差系数为几何下降情形,获得了强大数律的收敛速度为n^(-1/2)(log log n)^(1/2)(log n)~2.这个收敛... 详细信息

该文给出了一些负相协随机变量的指数不等式.这些不等式改进了由Jabbari和Azarnoosh及Oliveira所得到的相应的结果.利用这些不等式对协方差系数为几何下降情形,获得了强大数律的收敛速度为n^(-1/2)(log log n)^(1/2)(log n)~2.这个收敛速度接近独立随机变量的重对数律的收敛速度,而Jabbari和Azarnoosh在上述情形下得到的收敛速度仅仅为n^(-1/3)(log n)^(5/3).

关键词：负相协随机变量指数不等式收敛速度.

基于HyperWorks的某重卡副簧支架轻量化设计

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汽车实用技术 2016年第8期13卷 117-118页

作者：邢国栋李海波安徽江淮汽车股份有限公司安徽合肥230601

采用CATIA三维软件建模,运用Hyper Works对零部件进行有限元分析,对某重型载货车副簧支架进行应力分析,得出分析结果,从分析结果得出可优化部位,在不影响支架可靠性的前提下,实现该支架的轻量化设计。

关键词：副簧支架 CATIA HyperWorks 有限元分析轻量化设计

Homogeneous permeation and oriented crystallization in nanostructured mesopores for efficient and stable printable mesoscopic perovskite solar cells

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Science China Chemistry 2024年第11期67卷 3688-3696页

作者： guodong Zhang Yanjie Cheng Tingting Niu Ziwei Zheng Zongwei Li Junwei Xiang Qiaojiao Gao Minghao Xia Lijuan Guo Yiming Liu Mengru Zhang Yiran Tao Xueqin Ran Mingjie Li Guichuan xing Yingdong Xia Lingfeng Chao Anyi Mei Hongwei Han Yonghua Chen Key Laboratory of Flexible Electronics (KLoFE) and Institute of Advanced Materials (IAM) School of Flexible Electronics (Future Technologies) Nanjing Tech University Michael Gr?tzel Center for Mesoscopic Solar Cells Wuhan National Laboratory for Optoelectronics Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education Huazhong University of Science and Technology Department of Physics The Chinese University of Hong Kong Department of Applied Physics The Hong Kong Polytechnic University Shenzhen Research Institute The Hong Kong Polytechnic University Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau

The low-cost and scalable printable mesoporous perovskite solar cells(p-MPSCs) face significant challenges in regulating perovskite crystal growth due to their nanoscale mesoporous scaffold structure, which limits the improvement of device power conversion efficiency(PCE). In particular, the most commonly used solvents, N,N-dimethylformamide(DMF) and dimethyl sulfoxide(DMSO), have a single chemical interaction with the precursor components and high volatility, which is insufficient to self-regulate the perovskite crystallization process, leading to explosive nucleation and limited growth within mesoporous scaffolds. Here, we report a mixed solvent system composed of methylamine formaldehyde(MAFa)-based ionic liquid and acetonitrile(ACN) with the strong C=O–Pb coordination and N–H···I hydrogen bonding with perovskite components. We found that the mixed solvent system is beneficial for the precursor solution to homogeneously penetrate into the mesoporous scaffold,and the strong C=O–Pb coordination and N–H···I hydrogen bonding interaction can promote the oriented growth of perovskite crystals. This synergistic effect increased the PCE of the p-MPSCs from 17.50% to 19.21%, which is one of the highest records for p-MPSC in recent years. Additionally, the devices exhibit positive environmental stability, retaining over 90% of the original PCE after 1,200 h of aging under AM 1.5 illumination conditions at 55 °C and 55% humidity.

关键词： printable mesoscopic perovskite solar cells ionic liquid crytallization control hight efficiency and stability

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关于相依风险投资组合风险价值的界

数学年刊（A辑） 2021年第1期42卷 105-114页

作者：邢国东杨善朝官政合肥师范学院数学与统计学院合肥230601 玉林师范学院数学与统计学院广西玉林537000 广西师范大学数学与统计学院广西桂林541004

在正相依和分组相依的假设下,风险投资组合风险价值的上、下界被分析性地得到.所得到的结果实质性地将分组独立的设定推广到分组相依的情形.

关键词：同单调 Copula 相依不确定性差下限序上限序