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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 1. college of science Hunan Institute of Engineering Xiangtan 411104 China2. School of Mathematical Sciences South China Normal University Guangzhou 510631 China

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.

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

RECOVERY A POSTERIORI ERROR ESTIMATES FOR GENERAL CONVEX ELLIPTIC OPTIMAL CONTROL PROBLEMS SUBJECT TO POINTWISE CONTROL CONSTRAINTS

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Journal of Computational Mathematics 2009年第4期27卷 543-560页

作者： yanping chen Yao Fu Huanwen Liu Yongquan Dai Huayi Wei School of Mathematical sciences South China Normal University Guangzhou 510631 China college of Mechanical engineering Jiangxi Yu Zhou Scientific and Technological Institute Xinyu 338029 China School of Mathematics and Computer science Guangxi University for Nationalities Nanning 530006 China hunan Key Laboratory for Computation and Simulation in science and engineering School of Mathematics and Computational Science Xiangtan University

Superconvergence and recovery a posteriori error estimates of the finite element ap- proximation for general convex optimal control problems are investigated in this paper. We obtain the superconvergence properties of finite element solutions, and by using the superconvergence results we get recovery a posteriori error estimates which are asymptotically exact under some regularity conditions. Some numerical examples are provided to verify the theoretical results.

关键词： General convex optimal control problems Finite element approximation Control constraints Superconvergence Recovery operator.

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植物重金属镉积累调控机制及其应用研究进展

植物生理学报 2024年第2期60卷 185-210页

作者：彭佳师王娅婷王梦琦卢玲丽汪鹏李柱李赛陈思颖孟栓顾天宇徐文忠晁振飞黄煜琪金崇伟晁代印陈彩艳吴龙华滕应赵方杰龚继明湖南科技大学生命科学与健康学院重金属污染土壤生态修复与安全利用湖南省高校重点实验室湖南湘潭411201 中国科学院分子植物科学卓越创新中心植物分子遗传国家重点实验室上海200032 浙江大学环境与资源学院教育部环境修复与生态健康重点实验室杭州310058 南京农业大学资源与环境科学学院作物遗传与种质创新国家重点实验室南京210095 中国科学院南京土壤研究所中国科学院土壤环境与污染修复重点实验室南京210008 中国科学院亚热带农业生态研究所中国科学院亚热带农业生态过程重点实验室长沙410125 湖南农业大学农学院长沙410128 中国科学院植物研究所北方资源植物重点实验室北京100093

镉(Cd)容易通过食物链对人体产生毒害,其引起的“痛痛病”是人类历史上重要的公共卫生事件。Cd是我国当前土壤中的主要无机污染物,“镉大米”等事件仍时有发生,严重威胁粮食安全和人体健康。植物作为初级生产者,是人体Cd暴露的的主要途... 详细信息

镉(Cd)容易通过食物链对人体产生毒害,其引起的“痛痛病”是人类历史上重要的公共卫生事件。Cd是我国当前土壤中的主要无机污染物,“镉大米”等事件仍时有发生,严重威胁粮食安全和人体健康。植物作为初级生产者,是人体Cd暴露的的主要途径。因此,阐释Cd向植物迁移、在植物体内的转运以及植物的Cd耐受机理,并依此指导低Cd作物的遗传改良和Cd污染环境的植物修复就具有重要的意义。本文综述了近10年来人们在植物Cd积累的调控机理、应对Cd污染的作物改良以及植物修复等方面的基础研究和应用成果,同时也探讨了该领域未来亟待解决的一些重要科学问题以及作物遗传改良设计的途径。

关键词：镉低镉作物育种植物修复重金属超积累修复型作物

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基于一阶和二阶电路实现波形变换实验研究

实验科学与技术 2020年第3期18卷 22-26页

作者：彭霞李延平周细凤胡鹤宇陈意军湖南工程学院电气信息学院湘潭411104

在电类专业本科一年级的电工实验课程中,如何将理论与实际应用有效地结合起来是实验案例设计的重点和难点。本实验案例是在一阶、二阶电路响应实验的基础上,针对学生难以将电路参数与电路动态过程建立直观联系的问题,设计的基于一阶、... 详细信息

在电类专业本科一年级的电工实验课程中,如何将理论与实际应用有效地结合起来是实验案例设计的重点和难点。本实验案例是在一阶、二阶电路响应实验的基础上,针对学生难以将电路参数与电路动态过程建立直观联系的问题,设计的基于一阶、二阶电路实现波形变换研究实验。本实验设计通过搭建简单的一阶、二阶电路,实现由方波信号变换出幅值、频率可调的三角波、锯齿波、正弦波等常用的信号。实施结果表明,通过这样的实验能促进学生对理论知识的深层次掌握,挖掘学生的创造性思维。

关键词：电工实验案例一阶电路二阶电路波形变换