检索结果-南通市图书馆

Mainchain conformation ordering self-assembly tailored room temperature phosphorescence emission

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 329-336页

作者： Yuzhu Li Yumeng gao Feng Tian Yu Wang Yuan Yao Shaoliang Lin Xiang Ma Binbin Xu Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre Frontiers Science for Materiobiology and Dynamic Chemistry School of Chemistry and Molecular Engineering East China University of Science & Technology

Developing organic room-temperature phosphorescence （RTP） materials with a wide range of tunable-emission is significant in expanding the applications of RTP ***,we rationally designed amphiphilic alternating copolymers poly(1,2-bis（4-alkoxyphenyl）ethane-1,2-dione-alt-（ethylene glycol）x)(P（Bz-alt-EGx）) that combined the advantage of alternating benzil and EGxskeleton,and tunable mainchain *** a mainchain conformation ordering assembly （COA） process,P（Bz-alt-EGx） self-assembled into well-defined platelets,and such assemblies emitted blue RTP at ca.425 nm due to the ordered folded-chain conformation and confined *** contrast,traditional self-assembly （TA） of P（Bz-alt-EGx） obtained less ordered aggregates,such as asymmetric worms,vesicles,and rod-like *** resultant less ordered aggregates exhibited yellow-green RTP at ca.550 *** wide-tuning RTP emission in solution （between blue and yellow-green,over125 nm） is realized using the P（Bz-alt-EGx） alternating copolymers under the treatment of different self-assembly *** study uncovers a new strategy to tailor the RTP emission through different self-assembly pathways and holds great promise for the fabrication of advanced optical materials.

关键词：

同方期刊数据库

Simple Harish-Chandra supermodules over the super Schrdinger algebra

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2015年第12期58卷 2477-2488页

作者： CAI YanAn gao yun WANG YongJie School of Mathematical Sciences University of Science and Technology of China Department of Mathematics and Statistics York University

We study the N=1 super Schrdinger algebra S in(1+1)-dimensional spacetime. The first part of this paper determines the necessary and sufficient conditions for highest weight supermodules over S to be simple. The paper also describes the structure of all Verma supermodules and determines all simple Harish-Chandra supermodules over S.

关键词： super Schrodinger algebra weight supermodule simple supermodule Harish-Chandra supermodules

The Steinberg Lie Algebra st2（S）

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2016年第1期23卷 129-136页

作者： Yongjie Wang Yiqian Shi yun gao Wu Wen-Tsun Key Laboratory of Mathematics School of Mathematical Sciences University of Science and Technology of China Hefei 230026 China Department of Mathematics and Statistics York University Toronto Ontario M3J1P3 Canada

Let S be a nonassociative k-algebra. By using the Lie triple system, we study the subspace I2（S） of the Steinberg Lie algebra st2（S） and give a necessary and sufficient condition for I2（S） = 0.

关键词： Steinberg Lie algebra Steinberg unitary Lie algebra Lie triple system

Vertex-disjoint K_1+(K_1 ∪ K_2) in K_(1,4)-free Graphs with Minimum Degree at Least Four

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2014年第4期30卷 661-674页

作者： yun Shu gao Qing Song ZOU School of Mathematics and Computer Science Ningxia University Department of Mathematics Xidian University

A graph is said to be K1,4-free if it does not contain an induced subgraph isomorphic to K1,4. Let κ be an integer with κ ≥ 2. We prove that if G is a K1,4-free graph of order at least llκ- 10 with minimum degree ... 详细信息

关键词： Forbidden graphs Vertex-disjoint subgraphs Minimum degree

Strong Convergence Theorems of Common Elements for Equilibrium Problems and Fixed Point Problems in Banach Spaces

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2012年第2期28卷 337-350页

作者： Xing-hui gao Hai-yun ZHOU College of Mathematics and Computer Science Yanan UniversityYanan 716000China Department of Mathematics Shijiazhuang Mechanical Engineering UniversityShijiazhuang 050003China

In this paper, we consider hybrid algorithms for finding common elements of the set of common fixed points of two families quasi-C-non-expansive mappings and the set of solutions of an equilibrium problem. We establish strong convergence theorems of common elements in uniformly smooth and strictly convex Banach spaces with the property （K）.

关键词： strong convergence projection quasi-Ф-nonexpansive mapping common elements theproperty (K)

Color cyclic homology and Steinberg Lie color algebras

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2015年第5期10卷 1179-1202页

作者： Yongjie WANG Shikui SHANG yun gao School of Mathematical Sciences University of Science and Technology of China Hefei 230026 China Department of Mathematics and Statistics York University Toronto Ontario M3J 1P3 Canada

The present paper contains two interrelated developments. First, the basic properties of the construction theory over the Steinberg Lie color algebras are developed in analogy with Steinberg Lie algebra case. This is done on the example of the central closed of the Steinberg Lie color algebras. The second development is that we define the first ε-cyclic homology group HC1 （R, ε） of the F-graded associative algebra R （which could be seemed as the generalization of cyclic homology group and the Z/2Z-graded version of cyclic homology that was introduced by Kassel） to calculate the universal central extension of Steinberg Lie color algebras.

关键词： Steinberg Lie color algebra ε-cyclic homology group universalcentral extension

Effect of Initial Concentration on Adsorption-Desorption Characteristics and Desorption Hysteresis of Hexachlorobenzene in Soils

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pedosphere 2010年第1期20卷 104-110页

作者： gao Hong-Jian jiang Xin School of Resources and Environmental Science Anhui Agricultural University Hefei 230036 (China) State Key Lab of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 (China)

Adsorption and desorption are important processes that influence the transport, transformation, and bioavailability of hexachlorobenzene (HCB) in soils. To examine the adsorption-desorption characteristics of HCB, equilibrium batch experiments were carried out using two soils (red soil and paddy soil) with different initial HCB concentrations (0.25, 0.50, 0.75, 1.00, 1.50, 2.50, 3.50, and 5.00 mg L-1 ) by using 0.01 mol L-1 calcium chloride as the background solution. The successive desorption experiments (48, 96, 144, 192, and 240 h) were conducted after each adsorption equilibrium experiment. The results revealed that adsorption and desorption isotherms of HCB on two soils were nonlinear, which can be best described by the Freundlich equation with the square of the correlation coefficient (r 2 ) ranging from 0.97 to 0.99. Desorption of HCB from the two soils exhibited hysteresis at all HCB concentrations because the Freundlich desorption coefficients were always higher than the Freundlich adsorption coefficients. The hysteretic effect was enhanced with increasing initial HCB concentration, and positive hysteresis was observed at different concentrations.

关键词： Freundlich equation sorption coefficients sorption isotherms

Water environment security indicator system for urban water management

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2012年第5期6卷 678-691页

作者： Tian HAO Pengfei DU yun gao School of Environment Tsinghua UniversityBeijing 100084China

Water environment security （WES） is defined in terms of three aspects： first, that it meets basic demands due to industrial and domestic usage; second, that it protects public health from acute and chronic threats; and third, that measures are adopted to ensure sustainable ecological functioning of freshwater resources. Limitations associated with current water environment security indicators in China -- including inefficiency in terms of environmental monitoring, inappropriate indicators and parameters that do not take sufficient account of local water characteristics, and a lack of management targets -- leads to a failure of effective water management. To achieve better water environment management, a systema- tic approach, encompassing several steps including estab- lish ideal indicator system and narrow down the scope, screen priority pollutants, identify local characteristics and organize discussion workshop, should be followed to establish a comprehensive water environment indicator system. A case study in Suzhou is included to demonstrate the detailed operational procedures used to assess the risks associated with poor management practices relating to water environment security as well as design an appro- priate water environment security indicator system.

关键词： water environment security supervision andmanagement monitoring parameter indicator system,Suzhou

On multivariable Zassenhaus formula

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2019年第2期14卷 421-433页

作者： Linsong WANG yun gao Naihuan JING School of Mathematics South China University of Technology Guangzhou 510640 China Departmen t of Mathema tics and Statis tics York Uni vers 辻 y Toronto ON M3J 1P3 Canada Department of Mathematics North Carolina State University Raleigh NC 27695 USA

We give a recursive algorithm to compute the multivariable Zassenhaus formula e^X1+X2+…+Xn=e^X1eX2…e^Xn∏∞k=2e^Wk and derive an effective recursion formula of Wk.

关键词： Baker-Campbell-Hausdorff formula Zassenhaus formula