检索结果-南通市图书馆

Finite Groups in Which the Automizers of Some Abelian Subgroups are Trivial

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2018年第4期25卷 701-712页

作者： pengfei bai Xiuyun Guo Department of Mathematics Shanghai UniversityShanghai 200444China

If H is a subgroup of a finite group G,then the automizer AutG(H)of H in G is defined as the group of automorphisms of H induced by conjugation by elements of NG(H).A finite group G is called an NNC-group if for any non-normal abelian subgroup A,either AutG(A)=1 or CG(A)=*** this paper,classifications of nilpotent NNC-groups and non-solvable NNC-groups are *** also investigate the solvable NNC-groups and describe the structure of solvable NNC-groups.

关键词： NNC-group automizer automorphism

辽宁弓长岭铁矿床成矿物质来源及磁铁富矿成因探讨

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

岩石学报 2025年第1期41卷 289-303页

作者：孙晓辉汤好书陈继宏白鹏飞长安大学地球科学与资源学院西部矿产资源与地质工程教育部重点实验室西安710054 中国科学院地球化学研究所矿床地球化学国家重点实验室贵阳550081 鞍钢集团矿业弓长岭有限公司井采分公司辽阳111008 中国恩菲工程技术有限公司北京100080

辽宁鞍本地区是我国最大的BIF型铁矿资源基地,弓长岭铁矿床是该区最大的富铁矿床,其富铁矿成因机制备受关注。目前多认为其为热液改造条带状铁矿(贫矿)而成,但关于热液性质还存在变质热液、混合岩化热液及大气降水等不同认识。在总结前... 详细信息

辽宁鞍本地区是我国最大的BIF型铁矿资源基地,弓长岭铁矿床是该区最大的富铁矿床,其富铁矿成因机制备受关注。目前多认为其为热液改造条带状铁矿(贫矿)而成,但关于热液性质还存在变质热液、混合岩化热液及大气降水等不同认识。在总结前人研究成果基础上,本研究对辽宁弓长岭铁矿床二矿区条带状铁矿及富铁矿进行了系统的微量元素及Nd-Pb-S同位素分析,结果显示:条带状铁矿及富铁矿中磁铁矿的稀土配分模式一致,成矿物质来源于海水与高温热液混合。条带状铁矿中磁铁矿的ε_(Nd)(t)值变化较大(-6.9~1.5),而富铁矿中磁铁矿相应值(-7.7~-6.1)偏负且集中,指示形成富铁矿的热液流体来自地壳浅部。条带状铁矿中磁铁矿铅同位素μ值介于9.36~10.75,显示壳幔混源的特征;而富铁矿中磁铁矿的μ值(9.58~13.14)较高,指示后期壳源流体交代改造。条带状铁矿中黄铁矿的硫同位素值偏负,且分布集中(-2.08‰~-0.66‰,平均值-1.52‰),而富铁矿中黄铁矿的δ^(34)S同位素值(1.88‰~3.36‰,平均值2.39‰)明显偏重,指示富重硫同位素流体的交代作用。综合推测这种改造条带状铁矿的壳源、富重硫同位素的流体应为变质水与大气降水的混合热液流体,富铁矿为条带状铁矿在古元古代晚期经该混合热液流体改造,发生去硅存铁作用而成。

关键词：弓长岭鞍山群条带状铁建造磁铁富矿 Nd-Pb-S同位素

The Action on p-Groups and p-Supersolvability

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2017年第4期24卷 685-696页

作者： pengfei bai Xiuyun Guo Boru Zhang Department of Mathematics Shanghai University Shanghai 200444 China

Let a finite group A act on a finite p-group P with ｜P｜〉 p^e, where e is an integer with e 〉 2. In this paper, we show that P is centralized by OP（A^Ap-1） if every non-maximal class p-group of order p^e in P is ... 详细信息

关键词： action maximal class p-group p-supersolvability 3p-permutability

Finite Autocapable Groups with the 2-Groups of Maximal Class

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Algebra Colloquium 2024年第4期31卷 651-660页

作者： pengfei bai Xiuyun Guo Jiao Wang School of Applied Mathematics Shanxi University of Finance and Economics Taiyuan 030006China Department of Mathematics Shanghai UniversityShanghai 200444China Basic Courses Department Tianjin Sino-German University of Applied Sciences Tianjin 300350China

A group H is said to be autocapable if there exists a group M such that H is isomorphic to the absolute central factor group M/L(M)of *** this paper,we first prove that if N is a characteristic subgroup of an autocapable group H,then N is neither the generalized quaternion group nor the semi-dihedral ***,we give the classification of finite groups G if G/L(G)is a 2-group of maximal class.

关键词： autocapable group absolute center 2-group of maximal class

Adjusting oxygen vacancy of VO_(2)·xH_(2)O nanoarray architectures for efficient NH_(4)^(+) storage

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 2646-2654页

作者： Jia’ni Gong pengfei bai Jingjing Sun Yanyan Liu Xueying Dong Tao Hu Changgong Meng Yifu Zhang School of Chemistry Dalian University of TechnologyDalian 116024China School of Chemistry and Materials Sciences CAS Key Laboratory of Materials for Energy ConversionCAS Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei 230026China College of Environmental and Chemical Engineering Dalian UniversityDalian 116622China

Aqueous rechargeable batteries are the promising energy storge technology due to their safety,low cost,and environmental *** ion(NH_(4)^(+))is an ideal charge carrier for such batteries because of its small hydration radius and low molar *** this study,VO_(2)·xH_(2)O with rich oxygen defects(d-HVO)is designed and synthesized,and it exhibits unique nanoarray structure and good electrochemical performances for NH_(4)^(+)*** and calculation results indicate that oxygen defects in d-HVO can enhance the conductivity and diffusion rate of NH_(4)^(+),leading to improved electrochemical *** most significant improvement is observed in d-HVO with 2 mmol thiourea(d-HVO-2)(220 mAh·g^(-1) at 0.1 A·g^(-1)),which has a moderate defect content.A full cell is assembled using d-HVO-2 as the anode and polyaniline(PANI)as the cathode,which shows excellent cycling stability with a capacity retention rate of 80%after 1000 cycles and outstanding power density up to 4540 W·kg^(-1).Moreover,the flexible d-HVO-2||PANI battery,based on quasi-solid electrolyte,shows excellent flexibility under different bending *** study provides a new approach for designing and developing high-performance NH_(4)^(+)storage electrode materials.

关键词： hydrate vanadium dioxide oxygen defects ammonium-ion battery anode material

Characterization of Ionic Conducting Cross-linked Polyether Electrolytes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2005年第4期20卷 104-106页

作者：陈国荣 Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China

An appropriate amount of toluene 2,4-diisocyanate（TDI） was added into polyether（[（CH2CH2O）13 CH2O]n/Li salt electrolyte to form a cross-linked network,with improving the film proces sability and thermal *** relation between the structure and ioinc conductive properties of the cross-lined polyether electrolytes was investigated by means of Fourier transform infra-red spectroscopy（FTIR）,differential scanning calorimetry（DSC）,mechanical property and AC impedance *** electrolytes system is found to have two glass transitions,and it is found that the two Tgs increase with increasing salt *** the some Li salt concentration,the conductivity of cross-liked polyether/LiN（CF3SO2）2 complex system is higher than that of LiClo4,At EO/Li=25：1（mol ratio）,the former conductivity changes with temperature,while the later coincids with Arrhenius formula（σ=Ae^-Ea/RT）.The cross-linked polyether/LiN（CF3 SO2）2 electrolyte exhibits the maximum σ=10^-4.75S/cm at 30℃.

关键词： cross-linked polymer electrolyte ionic conductivity two glass transitions

Perilipin-2 mediates ferroptosis in oligodendrocyte progenitor cells and myelin injury after ischemic stroke

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 2015-2028页

作者： Jian Yang Jiang Wu Xueshun Xie pengfei Xia Jinxin Lu Jiale Liu Lei bai Xiang Li Zhengquan Yu Haiying Li Department of Neurosurgery&Brain and Nerve Research Laboratory The First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina Institute of Stroke Research Soochow UniversitySuzhouJiangsu ProvinceChina

Differentiation of oligodendrocyte progenitor cells into mature myelin-forming oligodendrocytes contributes to *** of remyelination due to oligodendrocyte progenitor cell death can result in severe nerve *** is an iron-dependent form of regulated cell death caused by membrane rupture induced by lipid peroxidation,and plays an important role in the pathological process of ischemic ***,there are few studies on oligodendrocyte progenitor cell *** analyzed transcriptome sequencing data from GEO databases and identified a role of ferroptosis in oligodendrocyte progenitor cell death and myelin injury after cerebral *** analysis suggested that perilipin-2(PLIN2)was involved in oligodendrocyte progenitor cell ***2 is a lipid storage protein and a marker of hypoxia-sensitive lipid droplet *** further investigation,we established a mouse model of cerebral ischemia/*** found significant myelin damage after cerebral ischemia,as well as oligodendrocyte progenitor cell death and increased lipid peroxidation levels around the infarct *** ferroptosis inhibitor,ferrostatin-1,rescued oligodendrocyte progenitor cell death and subsequent myelin *** also found increased PLIN2 levels in the peri-infarct area that co-localized with oligodendrocyte progenitor ***2 knockdown rescued demyelination and improved neurological *** findings suggest that targeting PLIN2 to regulate oligodendrocyte progenitor cell ferroptosis may be a potential therapeutic strategy for rescuing myelin damage after cerebral ischemia.

关键词： bioinformatics bulk RNA sequencing ferroptosis ischemic stroke myelin injury oligodendrocyte progenitor cell perilipin-2 single-cell RNA sequencing

乡村振兴环境下饲料企业应用电子商务创新发展模式的研究

在线全文

学校读者我要写书评

暂无评论

中国饲料 2021年第9期 142-145页

作者：白朋飞郑州升达经贸管理学院河南郑州451191

饲料业产值提升和总体规模的发展壮大,对我国乡村振兴和农民脱贫攻坚意义重大。当前我国饲料企业的电商模式主要包括B2B、B2C和O2O等。但大多数饲料企业本身规模较小,技术相对落后,对电商营销的投入也十分有限,严重制约了电商模式的创... 详细信息

饲料业产值提升和总体规模的发展壮大,对我国乡村振兴和农民脱贫攻坚意义重大。当前我国饲料企业的电商模式主要包括B2B、B2C和O2O等。但大多数饲料企业本身规模较小,技术相对落后,对电商营销的投入也十分有限,严重制约了电商模式的创新发展。为此,本文在大数据和云计算框架下提出一种基于云服务的饲料产品电商模式,以网络层、传输层、服务层和应用层等为基础架构,将云端信息服务与饲料产业链深度融合,在为饲料企业提供海量客户信息的同时,也提升和改善了饲料企业原有的销售模式、售后服务水平和物流效率。

关键词：乡村振兴电商云服务产业链

在线全文

学校读者我要写书评

暂无评论

陕西省红色旅游追赶超越发展的对策

改革与战略 2017年第6期33卷 138-142页

作者：白鹏飞延安大学经济与管理学院陕西延安716000

陕西省红色旅游发展存在红色旅游组织载体发展缓慢、人才队伍匮乏、创新发展不足、文化资源开发不充分等问题,其红色旅游追赶超越发展的思路和对策是:依托地方特色旅游资源,大力促进区域内红色旅游发展;加强区际合作,实现区域间红色旅... 详细信息

陕西省红色旅游发展存在红色旅游组织载体发展缓慢、人才队伍匮乏、创新发展不足、文化资源开发不充分等问题,其红色旅游追赶超越发展的思路和对策是:依托地方特色旅游资源,大力促进区域内红色旅游发展;加强区际合作,实现区域间红色旅游的联动发展;加强宣传推广活动,深化红色旅游国际化合作;加强红色旅游组织载体、人才队伍建设;创新红色旅游管理体制、旅游线路、旅游产品,构建合理的旅游公共服务体系;加强文化资源挖掘研究,实现文化与红色旅游融合发展。

关键词：红色旅游追赶超越发展联动发展