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Journal of Computational Mathematics 2023年第2期41卷 173-190页

作者： zewen wang Shufang Qiu Shuang Yu Bin Wu Wen Zhang School of Science East China University of TechnologyNanchang 330006China Guangdong Province Key Laboratory of Computational Scienc School of Computer Science and EngneeringSun Yat-sen UniversityGuangzhou 516007China School of Mathematics and Statistics Nanjing University of Information Science and TechnologyNanjing 210000China

In this paper,we mainly study an inverse source problem of time fractional diffusion equation in a bounded domain with an over-specified terminal condition at a fixed time.A novel regularization method,which we call the exponential Tikhonov regularization method with a parameter γ,is proposed to solve the inverse source problem,and the corresponding convergence analysis is given under a-priori and a-posteriori regularization parameter choice ***γis less than or equal to zero,the optimal convergence rate can be achieved and it is independent of the value of γ.However,when γ is greater than zero,the optimal convergence rate depends on the value of γ which is related to the regularity of the unknown ***,numerical experiments are conducted for showing the effectiveness of the proposed exponential regularization method.

关键词： Exponential regularization method Inverse source problem Fractional diffusion equation Ill-posed problem Convergence rate

Optimization of material structure of ploy-Si thin film based on Al induced crystallization

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Science China(Technological Sciences) 2009年第8期52卷 2186-2189页

作者： zewen wang Bing Xiong LiChong Zhang Yi Luo Tsinghua National Laboratory for Information Science and Technology and State Key Laboratory on Integrated Optoelectronics Department of Electronic Engineering Tsinghua University Beijing 100084 China

Based on Al induced crystallization (AIC) method, influences of different material structures on formation and characteristics of ploy-silicon thin films were studied and optimized. Al-Si films on glass with different structures (Si/Al/Glass, Al/Si/Glass, Si/Al/.../Si/Al/Glass) were deposited on glass substrates by sputtering method. All samples were annealed for MIC with varied time processes under 500°C N2 environment. X-ray diffraction test and scanning electron microscope were adopted to characterize crystallization performance and surface topography of AIC poly-silicon samples after removing residual aluminum. The electrical properties were also characterized by Hall test method. Quick process and high performance of AIC ploy-silicon thin film can be both obtained by use of periodic structure samples.

关键词： Al induced crystallization poly-Si thin film material structure sputtering periodic structure

Determination of pollution point source in parabolic system model

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Journal of Southeast University(English Edition) 2009年第2期25卷 278-285页

作者：王泽文东南大学数学系南京210096 东华理工大学数学与信息科学学院抚州344000

This paper considers an inverse problem for a partial differential equation to identify a pollution point source in a watershed. The mathematical model of the problem is a weakly coupled system of two linear parabolic equations for the concentrations u（x, t） and v（x, t） with an unknown point source F（x, t） = A（ t）δ（x- s） related to the concentration u（x, t）, where s is the point source location and A（t） is the amplitude of the pollution point source. Assuming that source F becomes inactive after time T＊, it is proved that it can be uniquely determined by the indirect measurements { v（0, t）, v（ a, t）, v（ b, t）, v（ l, t）, 0 〈 t ≤ T, T＊〈 T}, and, thus, the local Lipschitz stability for this inverse source problem is obtained. Based on the proof of its uniqueness, an inversion scheme is presented to determine the point source. Finally, two numerical examples are given to show the feasibility of the inversion scheme.

关键词： inverse source problem parabolic system uniqueness local Lipschitz stability pollution source

Haplotype-resolved T2T genome assemblies and pangenome graph of pear reveal diverse patterns of allele-specific expression and the genomic basis of fruit quality traits

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Plant Communications 2024年第10期5卷 100-120页

作者： Qionghou Li Xin Qiao Lanqing Li Chao Gu Hao Yin Kaijie Qi Zhihua Xie Sheng Yang Qifeng Zhao zewen wang Yuhang Yang Jiahui Pan Hongxiang Li Jie wang Chao wang Loren H.Rieseberg Shaoling Zhang Shutian Tao National Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization Sanya Institute of Nanjing Agricultural UniversityCollege of HorticultureNanjing Agricultural UniversityNanjingJiangsu 210095China Pomology Institute Shanxi Agricultural UniversityTaiguShanxi 030801China Department of Botany and Biodiversity Research Centre University of British ColumbiaVancouverBCCanada

Hybrid crops often exhibit increased yield and greater resilience,yet the genomic mechanism(s)underlying hybrid vigor or heterosis remain unclear,hindering our ability to predict the expression of phenotypic traits in hybrid ***,we generated haplotype-resolved T2T genome assemblies of two pear hybrid varieties,‘Yuluxiang’(YLX)and‘Hongxiangsu’(HXS),which share the same maternal parent but differ in their paternal *** then used these assemblies to explore the genome-scale landscape of allele-specific expression(ASE)and create a pangenome graph for *** was observed for close to 6000 genes in both hybrid cultivars.A subset of ASE genes related to aspects of fruit quality such as sugars,organic acids,and cuticular wax were identified,suggesting their important contributions to ***,Ma1,a gene regulating fruit acidity,is absent in the paternal haplotypes of HXS and YLX.A pangenome graph was built based on our assemblies and seven published pear *** data for 139 cultivated pear genotypes(including 97 genotypes sequenced here)were subsequently aligned to the pangenome graph,revealing numerous structural variant hotspots and selective sweeps during pear *** predicted,the Ma1 allele was found to be absent in varieties with low organic acid content,and this association was functionally validated by Ma1 overexpression in pear fruit and ***,these results reveal the contributions of ASE to fruit-quality heterosis and provide a robust pangenome reference for high-resolution allele discovery and association mapping.

关键词： pear haplotype-resolved assembly allele-specific expression fruit quality traits pangenome graph

Plant Stem Cell Informatics Database(PSCIdb):A comprehensive computational platform for identifying and analyzing genes related to plant stem cells

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Plant Communications 2024年第5期5卷 100-103页

作者： Xiao Wu Yubo Yuan Siyuan Zhou zewen wang Hongxiang Li Wanping Wu Zhijie Lei Siyao Liu Kaijie Qi Hao Yin Yun Zhou Shaoling Zhang Sanya Institute of Nanjing Agricultural University State Key Laboratory of Crop Genetics&Germplasm Enhancement and UtilizationNanjing Agricultural UniversityNanjing 210095China Department of Botany and Plant Pathology Purdue UniversityWest LafayetteIN 47907USA Purdue Center for Plant Biology Purdue UniversityWest LafayetteIN 47907USA

Dear Editor,Stem cells in the meristems of land plants share conserved functions,remaining undifferentiated while continually dividing and producing daughter cells that eventually differentiate into various new organs(Meyerowitz,1997;Heidstra and Sabatini,2014).Stem cell activity is therefore essential for sustaining plant growth and development,determining yield and biomass production,and dictating the diversity of body formation and plant architecture across species(Meyerowitz,1997;Heidstra and Sabatini,2014;Harrison,2017;Kitagawa and Jackson,2019).

关键词： Informatics eventually dividing

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文峰塔M1出土曾侯舆钟铭的初步研究

江汉考古 2015年第6期 106-111页

作者：王泽文中国社会科学院历史研究所出土文献与中国古代文明研究协同创新中心北京100732

本文分析了文峰塔M1出土的曾侯舆钟铭所反映的曾的始祖"南公"的族属、与周王室的关系,认为其可能不是周王室嫡系后裔,曾的始封可早到周武王世;结合《春秋》经传,讨论曾侯舆钟铭中反映的东周以降曾国和周王朝、楚的关系的变化;将钟铭中... 详细信息

本文分析了文峰塔M1出土的曾侯舆钟铭所反映的曾的始祖"南公"的族属、与周王室的关系,认为其可能不是周王室嫡系后裔,曾的始封可早到周武王世;结合《春秋》经传,讨论曾侯舆钟铭中反映的东周以降曾国和周王朝、楚的关系的变化;将钟铭中的历日和《春秋》经传历日对照,分析当时的历法情况。

关键词：文峰塔曾国曾侯舆周代史天文历法

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新型可恢复功能组合柱设计及其抗震性能研究

自然灾害学报 2023年第2期32卷 32-42页

作者：马高王择文湖南大学土木工程学院湖南长沙410082 工程结构损伤诊断湖南省重点实验室(湖南大学) 湖南长沙410082

为实现框架结构震后性能的快速恢复,提出了一种有良好自复位能力且易于修复的新型可恢复功能组合柱。考虑钢绞线滑移及无粘结钢绞线的受力特征,采用OpenSees对柱抗震性能进行验证及参数分析。对不同设防烈度普通钢筋混凝土(reinforced c... 详细信息

为实现框架结构震后性能的快速恢复,提出了一种有良好自复位能力且易于修复的新型可恢复功能组合柱。考虑钢绞线滑移及无粘结钢绞线的受力特征,采用OpenSees对柱抗震性能进行验证及参数分析。对不同设防烈度普通钢筋混凝土(reinforced concrete, RC)框架、钢绞线混凝土框架及应用可恢复柱的可恢复框架进行静力推覆及地震荷载下的残余位移及最大位移响应分析,得出各框架层间最大位移与残余位移的关系,并对比分析各框架在不同地震强度下的可恢复性能。结果表明:钢绞线配置率对可恢复柱的抗震性能有重要影响;7度设防RC框架应用可恢复柱后,底层梁柱塑性铰发展大幅减轻,延迟了框架的破坏,且其承载能力与自复位能力均高于8度设防RC框架;在地震作用下可恢复框架的失效概率最低,可恢复性最高,且地震作用越大,其相对于普通RC框架可恢复性的提升越为明显。

关键词：可恢复功能柱抗震性能可修复残余位移可恢复指标

Automatic Coil Delivery for Uncoiling Machine Based on Image Processing

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Automatic Coil Delivery for Uncoiling Machine Based on Image...

第32届中国控制与决策会议

作者： Gang Zheng zewen wang Haowen Li Siyu Liu Xi’an University of Technology Automation and Information Engineering

In order to automate the coil delivery for the cold rolling process and reduce manual operation error,this paper presents a method to locate and track the steel coil using monocular camera and image processing,and the core circle of coil is used as the tracking *** proposed method firstly determines the initial target location information by RHT,then configure the qualification conditions of detection for the next time step based on the target parameters from the last time *** edge detection is used to detect initial contour candidates,limited domain method,contour separation method,quadrant method are adopted to separate contour candidates and filter interference,then fit the target,and track the target by dynamic window *** the theoretical motion trajectory of the target by process a large number of video data,accurately mark the falling point and alignment point of the coil delivery *** has been verified in the industrial field that this method has high accuracy,good tracking stability and real-time performance in the case of sufficient *** with the traditional key-points detection methods based on sensor array,this system requires only a monocular camera,and realize the real-time location tracking,with higher accuracy and controllability,convenient for later maintenance.

关键词： Automatic coil Delivery Image Processing Limited Domain Method Contours Separation Method Quadrant Method Target Tracking

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晋文公请隧別解

南方文物 2018年第4期 147-152页

作者：王泽文中国社会科学院历史研究所出土文献与中国古代文明研究协同创新中心

晋文公请隧,历来有不同解释。本文分析了传统的葬礼说和六隧说,以及新的旗物说。结合《墨子·兼爱》关于周武王祀告泰山和《史记》关于齐桓公欲封禅的记载,提出另一种理解,即祀天(上帝)典礼说。

关键词：晋文公请隧春秋史礼制

太赫兹离轴数字全息消零级方法的像质评价及其分析

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激光与光电子学进展 2017年第11期54卷 149-157页

作者：汪泽文李琦袁静哈尔滨工业大学可调谐激光技术国家重点实验室黑龙江哈尔滨150080

在太赫兹离轴数字全息中,因其记录及再现距离较短,零级衍射会对再现像造成严重影响。利用三种图像质量客观评价指标,对2.52THz离轴数字全息中使用复振幅复原法和拉普拉斯算子消零级方法得到的再现像进行了比较分析。以成像实验中的分辨... 详细信息

在太赫兹离轴数字全息中,因其记录及再现距离较短,零级衍射会对再现像造成严重影响。利用三种图像质量客观评价指标,对2.52THz离轴数字全息中使用复振幅复原法和拉普拉斯算子消零级方法得到的再现像进行了比较分析。以成像实验中的分辨率板为模型设计了仿真目标,根据实验获得的照明光和参考光的强度分布仿真了全息图,利用角谱法进行再现,最后对真实太赫兹数字全息图进行了相同的处理,所得结果与仿真结论基本吻合。复振幅复原法和拉普拉斯算子法均能很好的抑制零级衍射。相比拉普拉斯算子法,复振幅复原法的零级衍射亮度衰减率更高,再现像整体上峰值信噪比更高,在高分辨率的0.2mm亮竖条纹区域具有更高的信噪比,图像质量更好。

关键词：成像系统太赫兹成像太赫兹离轴数字全息图像质量消零级方法客观评价指标