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Flag-transitive 2-(v,5,λ)designs with sporadic socle

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Frontiers of Mathematics in China 2020年第6期15卷 1201-1210页

作者： Jiaxin SHEN shenglin zhou School of Mathematics South China University of TechnologyGuangzhou 510640China

We state that the flag-transitive automorphism group of a 2-(v,5,λ)design D is primitive of affine type or almost simple type.W e also find that there are up to isomorphism 202-(v,5,λ)designs admitting flag-transiti... 详细信息

关键词： 2-design primitivity flag-transitivity sporadic simple group

Flag-transitive 2-（v, k, λ） symmetric designs with （k, λ） =1 and alternating socle

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Frontiers of Mathematics in China 2015年第6期10卷 1483-1496页

作者： Yan ZHU Haiyan GUAN shenglin zhou School of Mathematics South China University of Technology Guangzhou 510640 China Department of Mathematics China Three Gorges University Yichang 443002 China

Consider the flag-transitive 2-（v, k, λ） symmetric designs with （k, λ）= 1. We prove that if （） is a nontrivial 2-（v, k, λ）symmetric design with （k,λ） = 1 and G ≤ Aut（） is flag-transitive with Sot（G）... 详细信息

关键词： Symmetric design automorphism group alternating group flagtransitive

Flag-Transitive Point-Primitive（v, k, 4）-Symmetric Designs with PSLn（q） as Socle

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Journal of Mathematical Research with Applications 2018年第1期38卷 34-42页

作者： Yan ZHU shenglin zhou School of Basic Education Sciences Xuzhou Medical University School of Mathematics South China University of Technology

Let D be a nontrivial symmetric（v, k, 4） design, and G ≤ Aut（D） be flag-transitive and point-primitive with PSL（q） as socle. Then D is a 2-（15, 8, 4） symmetric design and Soc（G） = PSL（9）.

关键词： symmetric design flag-transitive point-primitive classical group

Classification of Flag-Transitive Primitive Symmetric(v, k, λ) Designs with PSL(2, q) as Socle

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Journal of Mathematical Research with Applications 2016年第2期36卷 127-139页

作者： Delu TIAN shenglin zhou Department of Mathematics Guangdong University of Education School of Mathematics South China University of Technology

Let D be a nontrivial symmetric(v, k, λ) design, and G be a subgroup of the full automorphism group of D. In this paper we prove that if G acts flag-transitively, pointprimitively on D and Soc(G) = PSL(2, q), then D ... 详细信息

关键词： symmetric design flag-transitive primitive group

On Vasantha Kandasamy's Problem

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Journal of Mathematical Research with Applications 2014年第2期34卷 249-252页

作者： Hanbin ZHANG shenglin zhou Department of Mathematics South China University of Technology

In this paper, we solve the problem proposed by Vasantha Kandasamy about the torsion-free non-abelian groups.

关键词： essential group torsion-free non-abelian group.

Finite Line-transitive Linear Spaces:Theory and Search Strategies

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Acta Mathematica Sinica,English Series 2009年第9期25卷 1399-1436页

作者： Anton BETTEN Anne DELANDTSHEER Maska LAW Alice C. NIEMEYER Cheryl E. PRAEGER shenglin zhou Colorado State University Department of Mathematics Fort Collins CO 80523 U.S.A. Universite Libre de Bruxelles Facultd des Sciences appliquges CP165J11 av. F.D. Roosevelt 50 B 1050 Brussels Belgium The University of Western Australia School of Mathematics and Statistics 35 Stirling Highway Crawley 6009 Australia Department of Mathematics South China University of Technology Guangzhou 510641 China

The paper summarises existing theory and classifications for finite line-transitive linear spaces, develops the theory further, and organises it in a way that enables its effective application. The starting point is a theorem of Camina and the fifth author that identifies three kinds of line-transitive automorphism groups of linear spaces. In two of these cases the group may be imprimitive on points, that is, the group leaves invariant a nontrivial partition of the point set. In the first of these cases the group is almost simple with point-transitive simple socle, and may or may not be point-primitive, while in the second case the group has a non-trivial point-intransitive normal subgroup and hence is definitely point-imprimitive. The theory presented here focuses on point-imprimitive groups. As a non-trivial application a classification is given of the point-imprimitive, line-transitive groups, and the corresponding linear spaces, for which the greatest common divisor gcd（k, v - 1） ≤ 8, where v is the number of points, and k is the line size. Motivation for this classification comes from a result of Weidong Fang and Huffing Li in 1993, that there are only finitely many non-trivial point-imprimitive, linetransitive linear spaces for a given value of gcd（k, v - 1）. The classification strengthens the classification by Camina and Mischke under the much stronger restriction k ≤ 8： no additional examples arise. The paper provides the backbone for future computer-based classifications of point-imprimitive, line- transitive linear spaces with small parameters. Several suggestions for further investigations are made.

关键词： linear space line-transitive automorphism group combinatorial design combinatorial search algorithm

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Sustainable and invisible anti-counterfeiting inks based on waterborne polyurethane and upconversion nanoparticles for leather products

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Journal of Leather Science and Engineering 2021年第1期3卷 383-393页

作者： Jun Xiang Jianxun Lin Zhonghui Wang shenglin zhou Zhenya Wang Qiang Yan Yidong Liu Haojun Fan College of Biomass Science and Engineering Key Laboratory of Leather Chemistry and Engineering of Ministry of EducationNational Engineering Research Center of Clean Technology in Leather IndustryState Key Labora-tory of Polymer Materials EngineeringSichuan UniversityChengdu 610065People’s Republic of China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShang-hai 200433People’s Republic of China Dongtai City Fu’an Synthetize Material Co.Ltd. YanchengJiangsuPeople’s Republic of China

Counterfeit leather products infringe the intellectual property rights of the business,cause enormous economic loss,and negatively influence the business enthusiasm for innovation.However,traditional anti-counterfeiting materials for leather products suffer from complicated fabrication procedures,photobleaching,and high volatile organic com-pound(VOC)emissions.Here,a sustainable and invisible anti-counterfeiting ink composed of waterborne polyure-thane and water-dispersible lanthanide-doped upconversion nanoparticles(UCNPs)featuring ease of preparation,high photostability,non-toxicity,low VOC emissions,and strong adhesion strength for leather products is designed and synthesized.After decorating on the surface of leather products,the obtained patterns are invisible under normal light conditions.Upon irradiation at 808 nm,the invisible patterns can be observed by naked eyes due to the visible light emitted by 808 nm excited UCNPs.Our approach described here opens a new pathway to realize the long-term,stable anti-counterfeiting function of leather products.

关键词： Sustainable Invisible anti-counterfeiting Waterborne polyurethane Upconversion nanoparticles Near-infrared light

Overexpression of IbSINA5 Increases Cold Tolerance through a CBF SINA-COR Mediated Module in Sweet Potato

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Phyton-International Journal of Experimental Botany 2021年第3期90卷 761-772页

作者： Shiyang Li Xue-Ao Liu Lizi Zhao Huiqing Huang Bei Li Zhizhong Song Meixia Liang Hongxia Zhang Limin Wang shenglin zhou Shandong Technology and Business University Yantai264005China The Engineering Research Institute of Agriculture and Forestry Ludong UniversityYantai264025China School of Life Sciences Ludong UniversityYantai264025China

Seven in absentia(SINA)family proteins play a central role in plant growth,development and resistance to abiotic stress.However,their biological function in plant response to cold stress is still largely unknown.In this work,a seven in absentia gene IbSINA5 was isolated from sweet potato.Quantitative real-time polymerase chain reaction(qRT-PCR)analyses demonstrated that IbSINA5 was ubiquitously expressed in various tissues and organs of sweet potato,with a predominant expression in fibrous roots,and was remarkably induced by cold,drought and salt stresses.Subcellular localization assays revealed that IbSINA5-GFP fusion protein was mainly localized in cytoplasm and nucleus.Overexpression of IbSINA5 in sweet potato led to dramatically improved resistance to cold stress in transgenic plants,which was associated with the up-regulated expression of IbCOR(cold-regulated)genes,increased proline production,and decreased malondialdehyde(MDA)and H2O2 accumulation in the leaves of transgenic plants.Furthermore,transient expression of IbCBF3,a C-repeat binding factor(CBF)gene,in the leaf protoplasts of wild type sweet potato plants up-regulated the expression of both IbSINA5 and IbCOR genes.Our results suggest that IbSINA5 could function as a positive regulator in the cold signaling pathway through a CBF-SINA-COR mediated module in sweet potato,and have a great potential to be used as a candidate gene for the future breeding of new plant species with improved cold resistance.

关键词： Cold stress IbSINA5 seven in absentia sweet potato transgenic plant

分离式霍普金森压杆试验中金属材料端面摩擦效应误差分析

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机械工程材料 2024年第2期48卷 89-96页

作者：张柱柱毛海涛周圣林焦鹏胡文林吴省均刘军张旸沈沛刘宇麟 92728部队上海200443

采用分离式霍普金森压杆(SHPB)试验结合有限元模拟方法计算重构38CrMoAl高强度钢的应力-应变曲线,研究了端面摩擦因数(0,0.1,0.2,0.3,0.4,0.5)、子弹入射速度(20,30,40 m·s^(-1))、试样长径比(0.25,0.50,1.00)和试样形状(圆柱体,立方体... 详细信息

采用分离式霍普金森压杆(SHPB)试验结合有限元模拟方法计算重构38CrMoAl高强度钢的应力-应变曲线,研究了端面摩擦因数(0,0.1,0.2,0.3,0.4,0.5)、子弹入射速度(20,30,40 m·s^(-1))、试样长径比(0.25,0.50,1.00)和试样形状(圆柱体,立方体)对端面摩擦效应引入的峰值应力、峰值应变测试误差的影响。结果表明:测试误差随端面摩擦因数的增大而增大,随长径比的增加而减小;截面面积相同的圆柱体和立方体试样的测试误差差值小于2%;端面摩擦因数较大时,控制子弹入射速度不能有效减小误差;将端面摩擦因数降到0.1以下,或是选用长径比1.00以上的试样,可以有效减小端面摩擦效应误差;试样中部和端面边缘处发生应力集中,随着试样长径比增大,应力集中部位占试样总长度比例减小,端面摩擦效应影响减小。

关键词：分离式霍普金森压杆端面摩擦效应数值模拟误差分析

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