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science china Mathematics 2010年第10期53卷 2679-2696页

作者： yang jiming1,& chen yanping2 1college of science,hunan institute of engineering,xiangtan 411104,china 2School of Mathematical sciences,South china Normal University,Guangzhou 510631,china college of science Hunan Institute of Engineering School of Mathematical sciences South China Normal University

A kind of compressible miscible displacement problems which include molecular diffusion and dispersion in porous media are investigated.A symmetric interior penalty discontinuous Galerkin (SIPG) method is applied to the coupled system of flow and *** the induction hypotheses instead of the cut-off operator and the interpolation projection properties,a priori hp error estimates are *** error bounds in L2(H1) norm for concentration and in L∞(L2) norm for velocity are optimal in h and suboptimal in p with a loss of power 1/2.

关键词： a priori error discontinuous Galerkin compressible miscible displacement coupled system

An endophytic fungus interacts with the defensinlike protein OsCAL1 to regulate cadmium allocation in rice

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Molecular Plant 2024年第2期17卷 312-324页

作者： Tianyu Gu Ziai Qi Yating Wang Siying chen Jing Yan Huapeng Qiu Yanxuan Yu Zjun Fang Junmin Wang jiming Gong National Key Laboratory of Plant Molecular Genetics Shanghai Center for Plant Stress BiologyCAS Center for Excellence in Molecular Plant SciencesChinese AcademyofSciencesShanghai200032China School of Life science and Technology ShanghaiTech UniversityShanghai 201210China University of the Chinese Academy of sciences Beijing 100049China hunan Key Laboratory of Economic Crops Genetic Improvement and Integrated Utilization College of Life ScienceHunan University of Science and TechnologyXiangtan411201China State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China institute of Crops and Nuclear Technology Utilization Zhejiang Academy of Agricultural SciencesHangzhou 310021China

Defensin-like proteins are conserved in multicellular organisms and contribute to innate immune re-sponses against fungal *** rice,defensins play a novel role in regulating cadmium(Cd)efflux from the ***,whether the antifungal activity of defensins correlates with Cd-efflux function remains *** this study,we isolated an endophytic Fusarium,designed Fo1o,by a comparative mi-crobiome analysis of rice plants grown in a paddy contaminated with ***10 is tolerant to high levels of Cd,but is sensitive to the defensin-like protein OsCAL1,which mediates Cd efflux to the *** found that Fo10 symbiosis in rice is regulated by OsCAL1 dynamics,and Fo10 coordinates multiple plant pro-cesses,including Cd uptake,vacuolar sequestration,efflux to the environment,and formation of Fe pla-ques in the *** processes are dependent on the salicylic acid signaling pathway to keep Cd levels low in the cytosol of rice cells and to decrease Cd levels in rice grains without any yield ***10 also plays a role in Cd tolerance in the poaceous crop maize and wheat,but has no observed effects in the eudicot plants Arabidopsis and *** together,these findings provide insights into the mech-anistic basis underlying how afungal endophyte and host plant interact to control Cd accumulation in host plants by adapting defense responses to promotethe establishment ofa symbiosis that permits adaptation to high-Cd environments.

关键词： defensin-like protein Fusarium oxysporum endophyte cadmium allocation

A POSTERIORI ERROR ANALYSIS FOR A FULLY DISCRETE DISCONTINUOUS GALERKIN APPROXIMATION TO A KIND OF REACTIVE TRANSPORT PROBLEMS

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Journal of Systems science & Complexity 2012年第2期25卷 398-409页

作者： jiming yang yanping chen college of science Hunan Institute of Engineering School of Mathematical sciences South China Normal University

In order to obtain an expected numerical solution, a fully discrete discontinuous Galerkin method is applied to a kind of reactive transport problems in two dimension. That is to say, the space variable is discretized with the symmetric interior penalty Calerkin method （SIPG）, and the time variable is done with the backward Euler method. Making use of the duality technique, hp approximation properties and the interpolation theory, a residual-type a posteriori error estimation is achieved, which can be used for adaptivity. Compared with the analyses of semi-discretization, the current presentation is more challenging and more significant.

关键词： A posteriori error discontinuous Galerkin duality technique full discretization reactivetransport.

A PRIORI ERROR ESTIMATES OF A COMBINED MIXED FINITE ELEMENT AND DISCONTINUOUS GALERKIN METHOD FOR COMPRESSIBLE MISCIBLE DISPLACEMENT WITH MOLECULAR DIFFUSION AND DISPERSION

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Journal of Computational Mathematics 2011年第1期29卷 91-107页

作者： jiming yang yanping chen college of science Hunan Institute of Engineering Xiangtan 411104 China School of Mathematical sciences South China Normal University Guangzhou 510631 China

A combined approximation for a kind of compressible miscible displacement problems including molecular diffusion and dispersion in porous media is studied. Mixed finite el- ement method is applied to the ftow equation, and the transport one is solved by the symmetric interior penalty discontinuous Galerkin method （SIPG）. To avoid the inconve- nience of the cut-off operator in [3, 21], some induction hypotheses different from the ones in [6] are used. Based on interpolation projection properties, a priori hp error estimates are obtained. Comparing with the existing error analysis that only deals with the diffusion case, the current work is more complicated and more significant.

关键词： A priori error Mixed finite element Discontinuous Galerkin Compressiblemiscible clisplacement.

The Full-Discrete Mixed Finite ElementMethods for Nonlinear Hyperbolic Equations

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Communications in Nonlinear science and Numerical Simulation 1998年第3期3卷 152-155页

作者： yanping chen and Yunqing HUANG(Department of Mathematics, Nanjing University, Najing 210008, china)(institute of Comp. & Appl. Math., xiangtan University, xiangtan 411105, china)E-mail: huangyq@*** Department of Mathematics Nanjing University Najing 210008 China institute of Comp. and Appl. Math. Xiangtan University Xiangtan 411105 China

This article treats mixed finite element methods for second order nonlinear hyperbolic equations. A fully discrete scheme is presented and improved L2-errorestimates are established. The convergence of both the functi... 详细信息

关键词： nonlinear hyperbolic equation mixed finite element methods convergence

The Superconvergence of Mixed FiniteElement Methods for Nonlinear HyperbolicEquations

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Communications in Nonlinear science and Numerical Simulation 1998年第3期3卷 155-158页

作者： yanping chen and Yunqing HUANG(Department of Mathematics. Nanjing University, Nanjing 210008, china)(institute of Comp. & Appl. Math., xiangtan University, xiangtan 411105. china)E-mail: huangyq@*** Department of Mathematics Nanjing University Nanjing 210008 China institute of Comp. and Appl. Math. Xiangtan University Xiangtan 411105 China

Improved L2-error estimates are computed for mixed finite element methods for second order nonlinear hyperbolic equations. Superconvergence results, L∞intime and discrete L2 in space, are derived for both the solutio... 详细信息

关键词： nonlinear hrperbolic equation mixed finite element methods superconvergence

GLOBAL SUPERCONVERGENCE FOR A MIXED FINITE ELEMENT METHOD FOR THE WAVE EQUATION

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Systems science and Mathematical sciences 1999年第2期12卷 159-165页

作者： chen yanping(Department of Mathematics, Nanjing University, Nanjing 210008, china)(institute of Computer & Applied Mathmatics, xiangtan University, xiangtan 411105, china) 南京大学数学系江苏南京

This paper treats the lowest-order Raviart-Thomas mixed finite element method for second order hyperbolic equation. The superconvergence phenomena between the finite element solution and its elliptic projection have b... 详细信息

关键词： Global superconvergence mixed finite element method hyperbolic equation.

矩形通道内超临界CO_(2)局部热流场可视化实验

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化工学报 2024年第8期75卷 2831-2839页

作者：曾港陈林杨董袁海专黄彦平中国科学院工程热物理研究所北京100190 湘潭大学数学与计算科学学院湖南湘潭411105 中国科学院大学航空宇航学院北京100049 中国核动力研究设计院重点实验室四川成都610213

准确测量超临界CO_(2)的边界层流动传热特性,对于先进超临界CO_(2)能源化工循环系统的设计和安全运行具有重要意义。研究基于一种改进的非接触式的相移激光干涉系统,探究了湍流条件下超临界CO_(2)在矩形截面通道的边界热流场演化趋势。... 详细信息

准确测量超临界CO_(2)的边界层流动传热特性,对于先进超临界CO_(2)能源化工循环系统的设计和安全运行具有重要意义。研究基于一种改进的非接触式的相移激光干涉系统,探究了湍流条件下超临界CO_(2)在矩形截面通道的边界热流场演化趋势。研究分析了基于长直通道局部热量输入条件下边界层密度场和温度场瞬态变化。这些定量信息可用于评估超临界CO_(2)在不同热通量(q=14057、5500、2014 W/m^(2))条件下的局部传热准则数。结果表明:局部边界热传输使边界流体密度快速下降了1.8 kg/m^(3);浮升力驱动边界流体与主流区域混合并迅速达到平衡状态;高热流条件下温度、密度梯度变化迅速且显著,显示了热边界层的快速形成。

关键词：对流流体动力学传递过程超临界二氧化碳测量

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Superconvergence of a Combined Mixed Finite Element and Discontinuous Galerkin Method for a Compressible Miscible Displacement Problem

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Acta Mathematicae Applicatae Sinica 2011年第3期27卷 481-494页

作者： Ji-ming yang yanping chen college of science Hunan Institute of Engineering Xiangtan 411104 China School of Mathematical sciences South China Normal University Guangzhou 510631 China

A combined mixed finite element and discontinuous Galerkin method for a compressible miscible displacement problem which includes molecular diffusion and dispersion in porous media is investigated. That is to say, the mixed finite element method with Raviart-Thomas space is applied to the flow equation, and the transport one is solved by the symmetric interior penalty discontinuous Galerkin （SIPG） approximation. Based on projection interpolations and induction hypotheses, a superconvergence estimate is obtained. During the analysis, an extension of the Darcy velocity along the Gauss line is also used in the evaluation of the coefficients in the Galerkin procedure for the concentration.

关键词： superconvergence mixed finite element discontinuous Galerkin compressible

基于Conv-Attention-MLP的新能源汽车电池异常检测方法

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科技资讯 2024年第4期22卷 98-102页

作者：陈旭东何宏周焱平湖南工程学院计算机与通信学院湖南湘潭411104

在新能源汽车电池异常信号的检测方面,针对传统异常检测方法对多个维度电池数据检测精度低、泛化性差等问题,提出一种融合了卷积(Conv)、自注意力机制(Attention)和多层感知机(Multilayer Perceptron,MLP)的Conv-Attention-MLP深度神经... 详细信息

在新能源汽车电池异常信号的检测方面,针对传统异常检测方法对多个维度电池数据检测精度低、泛化性差等问题,提出一种融合了卷积(Conv)、自注意力机制(Attention)和多层感知机(Multilayer Perceptron,MLP)的Conv-Attention-MLP深度神经网络方法。该方法首先对多个维度的时序数据使用特征卷积进行降维,再利用多头自注意力机制(MultiHead-Self-Attention,MSA)对数据的时间不同步以及数据逻辑之间的重建模,最后经过多层感知机(MLP)的连续线性映射与非线性运算,产生复杂的分段映射,以达到更好的拟合效果。实现了对多个维度电池数据的有效检测,提高了模型对于多样化数据的准确性和稳健性。实验结果表明:相较于传统异常检测方法,在vloongs数据集上Conv-Attention-MLP模型表现效果更加优越,展现出更高精度和更强的鲁棒性。

关键词：深度学习异常检测自注意力机制模型融合