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Nonlinear ergodic theorem for semitopological semigroups of non-Lipschitzian mappings in Banach spaces

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Chinese Science Bulletin 1997年第1期42卷 8-11页

作者： LI Gang and MA Jipu1. Department of Mathematics, yangzhou Normal College, yangzhou 225002, china 2. Department of Mathematics, Nanjing {3., Nanjing 210093. china Department of Mathematics Yangzhou Normal College Yangzhou China Department of Mathematics Nanjing University Nanjing China

LET G be a semitopological semigroup, i. e. G is a semigroup with a Hausdorff topology such that for each s∈G the mapping s|→s·t and s|→t·s from G to G are continuous. G is called right reversible if any two closed left ideals of G have non-void intersection. In this case, (G,≤) is a directed system when the binary relation '≤' on G is defined by a≤b if and only if Let E be the uniformly convex Banach space

关键词： nonlinear semigroup ergodic theorem non-Lipschitzian mapping.

Remanence characteristic of nanostructure of hard/soft magnetic multilayered systems with random easy axis orientations

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原子与分子物理学报 2002年第3期19卷 289-294页

作者： HU Jing-guo(Physics Department of yangzhou university yangzhou 225002) PhysicsDepartment of yangzhou university Yangzhou 225002

The macroscopic magnetic properties such as remanent magnetization of the ferromagnetic multilayer system with random easy axis orientations is investigated by using a effective micromagnet approach. The multilayer, which alternating soft/hard layers in which their easy axis orientations is random build a nanostructured multilayer, is considered to meet periodic boundary condition, the dependence of remanence on thickness has been analytical derived. Author find that the remancence clearly depends on the thickness of the soft magnetic layer nearly independence of thickness of hard magnetic layer. this analytical results are in excellent agreement with previous numerical results.

关键词：磁学性质磁化强度纳米结构硬磁性软磁性

The regular representation and regular covariant representation of crossed products of Woronowicz C^(*)-algebras

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Science china Mathematics 2005年第9期48卷 1245-1259页

作者： ZHANG Xiaoxia~(1,2) & GUO Maozheng~(1,3. 1. School of mathematical sciences,Peking university,Beijing 100871,{3. 2. Department of Mathematics,Yantai university,Yantai 264005,{3. 3. LMAM,Peking university,Beijing 100871,{3. 1. School of mathematical sciences Peking University 100871 Beijing China 2. Department of Mathematics Yantai University 264005 Yantai China 3. LMAM Peking University 100871 Beijing China

In this paper,it is shown that the regular representation and regular covariant representation of the crossed products A×α G correspond to the twisted multiplicative unitary operators,where A is a Woronowicz C~*-algebra acted upon by a discrete group ***,it is also shown that the regular covariant C~*-algebra is the Woronowicz C~*-algebra which corresponds to a multiplicative ***,an explicit description of the multiplicative unitary operator for C(SU_q(2) )×α (?) is given in terms of those of the Woronowicz C~*-algebra C(SU_q(2) ) and the discrete group G.

关键词： multiplicative unitary operator, Woronowicz C*-algebra, crossed product.

社会场域视角下“三好儿童”的内涵诠释与教育重塑

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河南师范大学学报（哲学社会科学版） 2024年第2期51卷 151-156页

作者：刘晓红訾扬州河南师范大学教育学部河南新乡453007

“三好儿童”指具有“好思想、好品行、好习惯”的青少年儿童,是继“三好学生”之后国家对人才培养提出的新要求。话语表述方式的差异,既反映出“三好儿童”内涵与外延的变化,也蕴含着时代的变迁。首先,“三好儿童”的提出是社会资本的... 详细信息

“三好儿童”指具有“好思想、好品行、好习惯”的青少年儿童,是继“三好学生”之后国家对人才培养提出的新要求。话语表述方式的差异,既反映出“三好儿童”内涵与外延的变化,也蕴含着时代的变迁。首先,“三好儿童”的提出是社会资本的象征,包含社会声望、社会符号和社会文化,即权威人士和学者的话语、政策文件以及传统教育思想。其次,“三好儿童”的内涵可以从社会场域视角进行阐释。在政治与文化场域中,品行代表着社会文明。在养成教育场域中,思想推动品行形成习惯。再次,“三好儿童”的养成是一个文化再生产的过程,在追求教育公平的前提下,从三个向度拓展“三好儿童”的养成路径:弱化资本差距,实现教育的伦理价值;悉力形塑惯习,革新弱势阶层的认知;提振场域润染,匡助教育目标的达成,最终实现再造“三好儿童”的目标。

关键词：三好儿童社会场域教育塑造

Relationship Between 2:1 Mineral Structure and the Fixation and Release of Cations

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Pedosphere 2003年第1期13卷 81-86页

作者： FENG KE, WANG XIAOLI, WANG XIAOZHI and TANG YANAgricultural College, yangzhou university, yangzhou 225009 (china) Agricultural College Yangzhou University Yangzhou 225009 (China)

The effects of different structures of 2:1 layer minerals, layer charge location, and changes of structure and charge during the weathering process on the fixation and release of interlayer cations are reviewed. It could be concluded that the fixation capacity is determined by the total amount of interlayer charge originating from both octahedral and tetrahedral sheets. The relationship between interlayer cation fixation and octahedral structure of the secondary minerals may be different from that of the primary minerals. The oxidation and reduction of cations with variable valence can greatly influence the cation-fixation capacity.

关键词： cation fixation interlayer charge mineral structure

Synthesis and 183. NMR Characterization of α-K7GaW11（TiO2）O3.·11H2O Heteropolyanion

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Chinese Chemical Letters 2001年第8期12卷 731-732页

作者： Xiao Peng ZHAN2, Lu MENG1* 1Faculty of Chemistry, Northeast Normal university, Changchun 13.024 2Department of Chemistry, yangzhou College of Education, yangzhou 225002 Department of Chemistry Yangzhou College of Education Yangzhou 225002 China Faculty of Chemistry Northeast Normal University Changchun 130024 China

The peroxotitanium-substituted heteropolytungstate (-K7GaW11(TiO2)O3.(11H2O has been synthesized and characterized by elemental analysis, IR, UV, 183. NMR and electrochemistry. 183. NMR spectrum consists of six lines with intensity ratio 2:2:1:2:2:2, indicated that the TiO2 occupied the empty octahedral site of the GaW11 anion forming a polyanion with Cs symmetry. The characteristic charge-transfer absorption band O22-?Ti at 3.5 nm occurs in the UV spectrum. The polarographic reduction potential of O22- at ca.+0.87 V has been found.

关键词： Peroxotitanium gallatotungstate Keggin structure 183. NMR.

Facile Synthesis of Isoamericanol and Isoamericanin A

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Chinese Chemical Letters 2004年第12期15卷 1392-1394页

作者： Xiao Bi JING Chao Guo YAN Jing SUN Li WANG Lin AN College of chemistry and Chemical Engineering, yangzhou university, yangzhou 225002 College of chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002

A number of benzodioxane compounds were synthesized using the pal1adium-catalyzedetherification of aryl halides by employing triphenylphosphan ligand. This method was used askey step in the synthesis of isoamericanol ... 详细信息

关键词： Synthesis isoamericanol A isoamericanin A benzodioxane.

BASIC FLOW PATTERNS AND OPTIMUM HYDRAULIC DESIGN OF A SUCTION BOX OF PUMPING STATION

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Journal of Hydrodynamics 2000年第4期12卷 46-51页

作者： Lu Lin guang yangzhou university, yangzhou 225009, P.R.china (Received April 14, 2000) yangzhou Univ. Yangzhou 225009 China

A numerical method based on 3. D turbulence flow was applied to simulate the flow pattern in suction boxes of six different types. In light of the computational results, the basic flow patterns in the boxes were revealed and a theoretical method to optimize hydraulically design of the suction box is developed. The box geometrical parameters, which influence the flow pattern in the box, could be optimized. The optimum criteria for the hydraulic design of the suction boxes of six types established, respectively. Furthermore, a summarization is given here based on the classification of the basic flow patterns in order to systematically understand the hydraulic design of suction boxes.

关键词： flow pattern optimum design suction box pumping station

黄河流域环境治理绩效的空间关联网络及影响因素分析

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环境科学研究 2024年第7期37卷 1546-1560页

作者：段洋洲王奕淇甄雯青长安大学经济与管理学院陕西西安710064

黄河流域作为我国重要的生态安全屏障,探索其环境治理绩效的空间关联网络特征及影响因素,有利于推进黄河流域生态保护和高质量发展。本文基于2006−2021年黄河流域60个地级及以上城市的面板数据,在构建超效率SBM模型(Slacks-Based Measur... 详细信息

黄河流域作为我国重要的生态安全屏障,探索其环境治理绩效的空间关联网络特征及影响因素,有利于推进黄河流域生态保护和高质量发展。本文基于2006−2021年黄河流域60个地级及以上城市的面板数据,在构建超效率SBM模型(Slacks-Based Measurement,SBM)测度黄河流域环境治理绩效的基础上,利用修正的引力模型和社会网络分析法探讨了环境治理绩效的空间关联网络特征及其影响因素。结果表明:①2006−2021年黄河流域环境治理绩效呈波动式上升趋势,且流域上游、中游和下游的环境治理绩效平均值都小于1,环境治理绩效整体偏低。②黄河流域各城市间环境治理绩效的网络密度较低,网络结构相对稳定,关联效率较高,不存在等级森严的网络结构,且济南市、青岛市等城市在网络中处于核心位置,巴彦淖尔市、白银市等城市处于边缘位置。③郑州市、淄博市等中下游城市对板块内外均产生溢出效应,临汾市、西宁市等中上游城市是关联网络的“发动机”,青岛市、济南市等区域核心城市成为关联网络中的受益方,西安市、兰州市等位于黄河“几”字弯都市圈的城市担任了桥梁作用。④地理空间邻近、经济发展差异及产业结构差异对黄河流域环境治理绩效空间关联网络产生正向影响,环境规制差异、科技创新差异、对外开放差异及政府调控差异的影响效果呈现阶段性变化的特征。研究显示,黄河流域环境治理绩效存在显著的空间关联和溢出效应,但空间关联程度较低,需不断提升空间关联网络的紧密程度,推动黄河流域区域间环境的协同治理与平衡发展。

关键词：环境治理绩效空间关联网络影响因素社会网络分析黄河流域