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On Coleman Automorphisms of Finite Nilpotent Groups by Cyclic Groups

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Acta Mathematica Sinica,English Series 2016年第12期32卷 1459-1464页

作者： jin Ke HAI Sheng bo GE College of Mathematics and Statistics Qingdao University

Let G be a finite group and let N be a nilpotent normal subgroup of G such that G/N is cyclic. It is shown that under some conditions all Coleman automorphisms of G are inner. Interest in such automorphisms arose from... 详细信息

关键词： Coleman automorphism the normalizer property nilpotent group

Priestley Spaces,Quasi-hyperalgebraic Lattices and Smyth Powerdomains

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Acta Mathematica Sinica,English Series 2006年第3期22卷 951-958页

作者： jin bo YANG Mao Kang LUO Institute of Mathematics Sichuan University Yangtze Center of Mathematics Sichuan University

We introduce the concept of quasi-hyperalgebraic lattice and prove that a complete lattice is a Priestley space with respect to the interval topology if and only if it is quasi-hyperalgebraic. Some characterizations of quasi-hyperalgebraic lattices are presented. We also prove that the Smyth powerdomain of a quasi-hyperalgebraic lattice is hyperalgebraic.

关键词： Priestley space quasi-hyperalgebraic lattice hypercontinuous lattice hyperalgebraic lattice Smyth powerdomain

Simultaneous bioimaging of MMP-2 and MMP-7 via Au-Se constructed fluorescence nanoprobe

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Science China Chemistry 2020年第1期63卷 135-140页

作者： Xiaonan gao Wenfei Guo Lulu Jiang bo Hu Xiaojun Liu Kehua Xu bo Tang College of Chemistry Chemical Engineering and Materials Science Key Laboratory of Molecular and Nano Probes Ministry of EducationInstitute of Molecular and Nano Science Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong Shandong Normal University

Au-Se bond strategy has been applied to construct fluorescence nanoprobe that is being used to simultaneously dual-image the tumor markers matrix metalloproteinase-2(MMP-2)and matrix metalloproteinase-7(MMP-7)in *** two Se-terminating ligand peptide chains respectively labeled with fluorescein isothiocyanate(FITC)and 5-Carboxytetramethylrhodamine(5-TAMRA)dyes are attached to the surface of Au nanoparticles(NPs).The nanoprobe can be specifically cut off by MMP-2 and MMP-7 respectively to carry out significant enhanced fluorescence recovery for simultaneously imaging both *** nanoprobe not only displays high selectivity and sensitivity towards MMP-2 and MMP-7,but also has strong anti-interference stability against biothiols and enhanced fidelity for avoiding"false positive"*** approach offers new perspectives in designing tumor-related early diagnosis approaches and also provides strategies for clinical applications.

关键词： fluorescence nanoprobe dual detection tumor markers fluorescence imaging Au nanoparticles

Green Function and Perturbation Method for Dissipative Systems Based on Biorthogonal Basis

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Communications in Theoretical Physics 2009年第6期51卷 1017-1022页

作者： ZHANG Li gao Yi-bo WANG Cheng School of Physics Northeast Normal University Changchun 130024 China College of Applied Sciences Beijing University of Technology Beijing 100124 China Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130024 China

Based on the approach of biorthogonal basis, we carry out the quasinormal modes （QNMs） expansions for a class of open systems described by the wave equation with outgoing wave boundary conditions. For such a non-Hermitian system, the eigenfunction perturbation expansions and Green function method, which are based on the orthogonal eigenvectors of the Hermitian Hamiltonian for the dosed quantum system, can be generalized in terms of the biorthogonal basis, the two sets of eigenfunctions of H and its adjointness H . The time-independent perturbation theory for the complex frequencies can be also developed.

关键词： biorthogonal basis open system quasinormal mode

INTERACTION OF A DISLOCATION DIPOLE WITH A MODE III INTERFACE CRACK

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Acta Mechanica Solida Sinica 2007年第1期20卷 50-56页

作者： jin bo Fang Qihong Liu Youwen College of Civil Engineering Hunan University Changsha 410082 China College of Mechanics and Aerospace Hunan University Changsha 410082 China

Interaction between a screw dislocation dipole and a mode III interface crack is investigated. By using the complex variable method, the closed form solutions for complex potentials are obtained when a screw dislocation dipole lies inside a medium. The stress fields and the stress intensity factors at the tip of the interface crack produced by the screw dislocation dipole are given. The influence of the orientation, the dipole arm and the location of the screw dislocation dipole as well as the material mismatch on the stress intensity factors is discussed. The image force and the image torque acting on the screw dislocation dipole center are also calculated. The mechanical equilibrium position of the screw dislocation dipole is examined for various material property combinations and crack geometries. The results indicate that the shielding or anti-shielding effect on the stress intensity factor increases abruptly when the dislocation dipole approaches the tip of the crack. Additionally, the disturbation of the interface crack on the motion of the dislocation dipole is also significant.

关键词： dislocation dipole interface crack image force image torque

Identification and Comparison of Aircraft Industry Clusters in China and United States

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Chinese Geographical Science 2010年第5期20卷 471-480页

作者： CHU bo ZHANG Hua jin Fengjun Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beo'ing 100101 China School of Geography Beo'ing Normal University Beij'ing 100875 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

Aircraft industry is very important to the economy and security of a country,and aircraft industry clusters have already existed in the *** on Input-Output data and Czamanski's method,the aircraft industry clusters in China and USA were identified quantitatively in this ***,this article carried out comparison analyses of the identification *** research finds out:1) a mature aircraft industry cluster would be generally composed of 7 industrial subgroups,including aircraft industry,metal making and products manufacturing industry,machinery and equipment industry,electronics industry,automobile industry,material industry and others,and electronics industrial subgroup will play a more and more important role in the cluster;2) in the range of industry-covering,the level of industry-linkage,and the economic performance,there is a tremendously large gap between the aircraft industry cluster of China and that of USA;3) the spatial evolution of these clusters or centers is highly consistent with the diffusion of a country's ***,based on those findings,the paper gives some advice on how to improve Czamanski's method and what China should do to develop its own competitive aircraft industry:1) China should employ institutional innovation,and turn to be market-oriented;2) China should abandon the traditional pattern of closed-development,and strengthen the interaction and collaboration between aircraft industry and related industries,especially the electronics industry;3) China should rectify and perfect its spatial development planning of aircraft industry.

关键词： aircraft industry industry cluster Czamanski's method Input-Output

基于离散元的钢渣透水沥青混合料疲劳损伤数值仿真

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江苏大学学报（自然科学版） 2025年第1期46卷 98-104页

作者：刘振辉陈雪琴董侨姚波范进南京理工大学理学院江苏南京210094 南京理工大学安全科学与工程学院江苏南京210094 东南大学交通学院江苏南京211189 东南大学道路交通工程国家级实验教学示范中心江苏南京211189

采用钢渣替换透水沥青混合料中部分玄武岩粗集料,开展室内疲劳试验及数值仿真,研究钢渣透水沥青混合料的疲劳性能.基于CT扫描获取图像,通过阈值分割将混合料中钢渣、玄武岩、沥青砂浆和孔隙进行区分,导入颗粒流程序(PFC),建立颗粒直径为... 详细信息

采用钢渣替换透水沥青混合料中部分玄武岩粗集料,开展室内疲劳试验及数值仿真,研究钢渣透水沥青混合料的疲劳性能.基于CT扫描获取图像,通过阈值分割将混合料中钢渣、玄武岩、沥青砂浆和孔隙进行区分,导入颗粒流程序(PFC),建立颗粒直径为0.4 mm的钢渣透水沥青混合料离散元模型,基于宏观和细观力学参数转换及虚拟强度试验进一步校正细观力学参数,开展虚拟疲劳损伤数值模拟,得到重复荷载作用下试件微裂纹扩展路径及疲劳寿命.结果表明:虚拟强度试验能够较好地模拟钢渣透水沥青混合料试件荷载与位移关系曲线,试件裂纹扩展路径符合实际断裂情况,裂纹的分布主要沿着模型内部孔隙处扩展;虚拟疲劳损伤模型能够较好地描绘平行黏结模型的黏结直径随荷载作用次数的增加而减小、随着平行黏结接触颗粒间的拉应力增大而加速减小的趋势,虚拟疲劳损伤模型计算结果和室内疲劳损伤试验结果较为接近,误差不到10%,可有效预测高应力比下钢渣透水沥青混合料的疲劳寿命.

关键词：钢渣透水沥青混合料疲劳损伤离散元方法裂纹扩展

Prediction and driving factors of forest fire occurrence in Jilin Province,China

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Journal of Forestry Research 2024年第1期35卷 58-71页

作者： bo gao Yanlong Shan Xiangyu Liu Sainan Yin bo Yu Chenxi Cui Lili Cao Wildland Fire Prevention and Fighting Innovation Center of Beihua University Forestry College of Beihua University3999 Binjiang East RoadJilin City 132013People’s Republic of China

Forest fires are natural disasters that can occur suddenly and can be very damaging,burning thousands of square *** is better than suppression and prediction models of forest fire occurrence have developed from the logistic regression model,the geographical weighted logistic regression model,the Lasso regression model,the random forest model,and the support vector machine model based on historical forest fire data from 2000 to 2019 in Jilin *** models,along with a distribution map are presented in this paper to provide a theoretical basis for forest fire management in this *** studies show that the prediction accuracies of the two machine learning models are higher than those of the three generalized linear regression *** accuracies of the random forest model,the support vector machine model,geographical weighted logistic regression model,the Lasso regression model,and logistic model were 88.7%,87.7%,86.0%,85.0%and 84.6%,*** is the main factor affecting forest fires,while the impacts of topography factors,human and social-economic factors on fire occurrence were similar.

关键词： Forest fire Occurrence prediction Forest fire driving factors Generalized linear regression models Machine learning models

A Modified Landweber Iteration for General Sideways Parabolic Equations

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Acta Mathematicae Applicatae Sinica 2011年第4期27卷 727-738页

作者： jin-bo LIU You-jun DENG Department of Mathematics Changsha University of Science and Technology Changsha 410076 China School of Mathematical Sciences and Computing Technology Central South University Changsha Hunan 410075China

Abstract In this paper, we introduce a modified Landweber iteration to solve the sideways parabolic equation, which is an inverse heat conduction problem （IHCP） in the quarter plane and is severely ill-posed. We shall show that our method is of optimal order under both a priori and a posteriori stopping rule. Furthermore, if we use the discrepancy principle we can avoid the selection of the a priori bound. Numerical examples show that the computation effect is satisfactory.

关键词： inverse heat conduction problem sideways parabolic equation Landweber iteration,discrepancy principle