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基于自投影注意力的城市道路点云智能识别

测绘科学 2024年第3期49卷 67-76页

作者：杨莹邹文明黄恺翔王进陈昱臻金钊浙江省测绘科学技术研究院杭州310000 浙江大学流体动力与机电系统国家重点实验室杭州310027

针对大规模城市道路点云环境中,道路典型地物识别效率不高的问题,提出了一种基于自投影注意力的三维点云模型U-RandLA,通过点云投影算法获取道路点云信息自投影图,采用二维图像卷积网络分支U-Proj提取该自投影图特征,生成注意力分布图,... 详细信息

针对大规模城市道路点云环境中,道路典型地物识别效率不高的问题,提出了一种基于自投影注意力的三维点云模型U-RandLA,通过点云投影算法获取道路点云信息自投影图,采用二维图像卷积网络分支U-Proj提取该自投影图特征,生成注意力分布图,强化模型对典型地物的识别能力,提升了现有点云识别算法的重点区域感知能力;融合点云原始信息和具有大感受野的注意力分布图的特征,扩增模型初始感受野,解决现有算法感受野狭窄问题,提升对大尺度典型地物的信息提取能力。实验结果表明,U-RandLA模型对典型地物的平均识别准确率达到97.7%,物体平均交并比达到64.4%。帮助提升了实际项目的生产效率,已成功应用于浙江省、上海市、山东省、重庆市等城市道路部件的智能提取。

关键词：车载LiDAR点云点云智能识别 RandLA网络点云投影注意力机制

Bifurcation and multiplicity of positive solutions for nonhomogeneous fractional Schrödinger equations with critical growth

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Science China Mathematics 2020年第8期63卷 1571-1612页

作者： Xiaoming He wenming zou College of Science Minzu University of ChinaBeijing 100081China Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China

In this paper we study the nonhomogeneous semilinear fractional Schr?dinger equation with critical growth{(−∆)su + u = u^2∗s−1 + λ(f(x, u) + h(x)), x ∈ R^N ,u ∈ Hs(R^N ), u(x) > 0, x ∈ RN ,where s∈(0,1),N>4 s,andλ>0 is a parameter,2s*=2 N/N-2 s is the fractional critical Sobolev exponent,f and h are some given *** show that there exists 0λ*,a unique solution(λ*,uλ*)ifλ=λ*,which shows that(λ*,uλ*)is a turning point in Hs(RN)for the *** proofs are based on the variational methods and the principle of concentration-compactness.

关键词： fractional Schrödinger equation bifurcation and multiplicity concentration-compactness principle critical Sobolev exponent

Ground state solutions for a class of fractional Kirchhoff equations with critical growth

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Science China Mathematics 2019年第5期62卷 853-890页

作者： Xiaoming He wenming zou College of Science Minzu University of China Department of Mathematical Sciences Tsinghua University

In this paper, we study the effect of lower order perturbations in the existence of positive solutions to the fractional Kirchhoff equation with critical growth■ where a, b > 0 are constants, μ > 0 is a parameter,■ , and V : R^3→ R is a continuous potential function. For suitable assumptions on V, we show the existence of a positive ground state solution, by using the methods of the Pohozaev-Nehari manifold, Jeanjean's monotonicity trick and the concentration-compactness principle due to Lions(1984).

关键词： fractional Kirchhoff equations ground state solutions Pohozaev-Nehari manifold critical Sobolev exponent

The critical case for a Berestycki-Lions theorem

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Science China Mathematics 2014年第3期57卷 541-554页

作者： ZHANG Jian zou wenming Department of Mathematical Sciences Tsinghua University

We consider the existence of the ground states solutions to the following Schrdinger equation:△u+V(x)u=f(u),u∈H1(RN),where N 3 and f has critical *** generalize an earlier theorem due to Berestycki and Lions about... 详细信息

关键词：临界增长定理狮子薛定谔方程基态解亚临界

On the existence and regularity of vector solutions for quasilinear systems with linear coupling

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Science China Mathematics 2019年第1期62卷 125-146页

作者： Yong Ao Jiaqi Wang wenming zou Department of Mathematical Sciences Tsinghua University

We study the following coupled system of quasilinear equations:Under some assumptions on the nonlinear terms f and g, we establish some results about the existence and regularitl of vector solutions for the p-Laplacian systems by using variational methods. In particular, we get two pairs of nontrivial solutions. We also study the different asymptotic behavior of solutions as the coupling parameter λ tends to zero.

关键词： p-Laplacian system least energy solutions Moser iteration variational methods

Plant genomic resources at National Genomics Data Center:assisting in data-driven breeding applications

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aBIOTECH 2024年第1期5卷 94-106页

作者： Dongmei Tian Tianyi Xu Hailong Kang Hong Luo Yanqing Wang Meili Chen Rujiao Li Lina Ma Zhonghuang Wang Lili Hao Bixia Tang Dong zou Jingfa Xiao wenming Zhao Yiming Bao Zhang Zhang Shuhui Song National Genomics Data Center Beijing Institute of GenomicsChinese Academy of Sciences&China National Center for BioinformationBeijing 100101China CAS Key Laboratory of Genome Sciences and Information Beijing Institute of GenomicsChinese Academy of Sciences&China National Center for BioinformationBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Genomic data serve as an invaluable resource for unraveling the intricacies of the higher plant systems,including the constituent elements within and among *** various efforts in genomic data archiving,integrative analysis and value-added curation,the National Genomics Data Center(NGDC),which is a part of the China National Center for Bioinformation(CNCB),has successfully established and currently maintains a vast amount of database *** dedicated initiative of the NGDC facilitates a data-rich ecosystem that greatly strengthens and supports genomic research ***,we present a comprehensive overview of central repositories dedicated to archiving,presenting,and sharing plant omics data,introduce knowledgebases focused on variants or gene-based functional insights,highlight species-specific multiple omics database resources,and briefly review the online application *** intend that this review can be used as a guide map for plant researchers wishing to select effective data resources from the NGDC for their specific areas of study.

关键词： Plant-omics data Data repositories Data integration Knowledgebase Plant genomics

INFINITELY MANY SOLUTIONS FOR A SINGULAR ELLIPTIC EQUATION INVOLVING CRITICAL SOBOLEV-HARDY EXPONENTS IN R^N

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Acta Mathematica Scientia 2010年第3期30卷 830-840页

作者：贺小明邹文明 School of Sciences Central University for Nationalities Department of Mathematical Sciences Tsinghua University

In this article, we study the existence of multiple solutions for the singular semilinear elliptic equation involving critical Sobolev-Hardy exponents -△μ-μ｜x｜^2^-μ=α｜x｜^s^-｜μ｜^2＊（s）-2u＋βα（x）｜u｜^r-2u,x∈R^n. By means of the concentration-compactness principle and minimax methods, we obtain infinitely many solutions which tend to zero for suitable positive parameters α,β.

关键词： Singular elliptic equation Multiple solutions Critical Sobolev-Hardy exponent Minimax method

变分方法及其在非线性偏微分方程应用方面的进展和未决问题

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江西师范大学学报（自然科学版） 2018年第2期42卷 111-129,207页

作者：邹文明清华大学数学科学系北京100084

先介绍变分法发展的简单历史以及将来的发展趋势.然后综述变分法应用于非线性偏微分方程的基本思想和最新成果.通俗介绍环绕理论、变号临界点理论及应用,其中包括对称扰动方程和Rabinowitz公开问题、Brezis-Nirenberg临界指数方程、Li-... 详细信息

先介绍变分法发展的简单历史以及将来的发展趋势.然后综述变分法应用于非线性偏微分方程的基本思想和最新成果.通俗介绍环绕理论、变号临界点理论及应用,其中包括对称扰动方程和Rabinowitz公开问题、Brezis-Nirenberg临界指数方程、Li-Lin公开问题、Bose-Einstein凝聚、Berestycki-Caffarelli-Nirenberg猜测和Lane-Emden方程及猜想.

关键词：变分法非线性偏微分方程环绕理论临界指数变号临界点理论薛定谔方程

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电子地图的多源数据导入与坐标地址的自编辑

测绘信息与工程 2009年第4期34卷 50-51页

作者：董志邹文明浙江省第一测绘院杭州市保俶北路83号310012

讨论了使用者部分参与电子地图制作的过程,分析了交互式数据导入与数据坐标编辑的方法;并将Dotnet与Ajax技术相配合,实现了电子地图的多源数据导入功能和数据坐标地址的自编辑功能。

关键词：电子地图多源数据导入坐标地址自编辑

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