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Communications in Theoretical Physics 2002年第7期38卷 1-8页

作者： tang Xiao-yan LOU Sen-Yue Applied Physics Department Shanghai Jiao Tong University Shanghai 200030 China Applied Physics Department Shanghai Jiao Tong University Shanghai 200030 China Physics Department Ningbo University Ningbo 315211 China

We study the localized coherent structures ofa generally nonintegrable (2+ 1 )-dimensional KdV equation via a variable separation approach. In a special integrable case, the entrance of some arbitrary functions leads to abundant coherent structures. However, in the general nonintegrable case, an additional condition has to be introduced for these arbitrary functions. Although the additional condition has been introduced into the solutions of the nonintegrable KdV equation, there still exist many interesting solitary wave structures. Especially, the nonintegrable KdV equation possesses the breather-like localized excitations, and the similar static ring soliton solutions as in the integrable case. Furthermor,in the integrable case, the interaction between two travelling ring solitons is elastic, while in the nonintegrable case we cannot find even the single travelling ring soliton solution.

关键词： variable separation approach, integrable and nonintegrable models, (2+1)-dimensional solitons

A TVD Type Wavelet-Galerkin Method for Hamilton-Jacobi Equations

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Acta Mathematicae Applicatae Sinica 2007年第2期23卷 303-310页

作者： Ling-yan tang Song-he Song Department of Mathematics and System Science Science School National University of Defense Technology Hunan 410073 China

In this paper, we use Daubechies scaling functions as test functions for the Galerkin method, and discuss Wavelet-Galerkin solutions for the Hamilton-Jacobi equations. It can be proved that the schemes are TVD schemes. Numerical tests indicate that the schemes are suitable for the Hamilton-Jacobi equations. Furthermore, they have high-order accuracy in smooth regions and good resolution of singularities.

关键词： Hamilton-jacobi equation wavelet-galerkin method daubechies wavelet TVD method

Electrochemical oxidation of humic acid at the antimony- and nickel-doped tin oxide electrode

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Frontiers of Environmental Science & Engineering 2014年第3期8卷 337-344页

作者： Chengli tang Wei yan Chunli ZHENG Department of Environmental Science and Engineering Xi'an Jiaotong University Xi'an 710049 China

This work investigated the degradation of humic acid （HA） in aqueous solution by electrochemical oxidation with Antimony- and Nickel-doped Tin oxide electrode （Ni-Sb-SnO2/Ti electrode） as the anode. Initial concentrations of HA ranged from 3 to 9 mg-L 1. Under such a concentration scope, the degradation of HA was a mass transfer controlled process. Degradation rate increased with the increase of HA initial concentration. Test on the effect of tert-butanol revealed that · OH played an important role in the oxidation of HA. The absence of cation Ca2＋ was beneficial to HA degradation, which suggested that both indirect and direct electrolyze happened during the whole electrochemical oxidation process. Alkaly （pH = 12） and neutral （pH = 7） conditions were benefical to HA degradation.

关键词： electrochemical oxidation humic acid (HA) natural water Ni-Sb-SnO2/Ti electrode

Quasi-periodic and Non-periodic Waves in （2q-1）-Dimensional Nonlinear Systems

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Communications in Theoretical Physics 2005年第4X期44卷 583-588页

作者： tang Xiao-yan LOU Sen-Yue Department of Physics Shanghai Jiao Tong University Shanghai 200030 China Department of Physics Ningbo University Ningbo 315211 China

New exact quasi-periodic and non-periodic solutions for the （2＋ 1）-dimensional nonlinear systems are studied by means of the multi-linear variable separation approach （MLVSA） and the Jacobi elliptic functions with the space-time-dependent modulus. Though the result is valid for all the MLVSA solvable models, it is explicitly shown for the long-wave and short-wave interaction model.

关键词： quasi-periodic waves non-periodic waves multi-linear variable separation approach the longwave and thort-wave interaction model

Preparation and ζ-potential characterization of highly dispersible phosphate—functionalized magnetite nanoparticles

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Science China(Physics,Mechanics & Astronomy) 2011年第10期54卷 1766-1770页

作者： LI XueYi tang yan GE GuangLu CAS Key Laboratory of Measurement and Standardization for Nanotechnology National Center for Nanoscience and Technology Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

By the combination of high-temperature organometallic synthesis and phase transfer through complete ligand-exchange withmixed phosphate, highly water-dispersible Fe3O4nanoparticles with narrow size distribution are obtained, which show appli-cable response to magnetic field. IR and -potential characterization of this system provides insights into ligand structures onparticle surface.

关键词： magnetite nanoparticle ξ-potential ligand-exchange

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Communications in Theoretical Physics 2008年第1期49卷 229-230页

作者： tang Xiao-yan Padma Kant Shukla Department of Physics Shanghai Jiao Tong University Shanghai 200240 China Institut fur Theoretische Physik IV Fakultat fur Physik und Astronomie Ruhr-Universitat Bochum D-44870 Bochum Germany School of Physics University of KwaZulu-Natal 4000 Durban South Africa

Applying the classical Lie symmetry approach to the barotropic and quasi-geostrophic potential vorticity equation without forcing and dissipation on a β-plane channel, we find a new symmetry, which is not presented in a previous work [F. Huang, Commun. Theor. Phys. （Beijing, China） 42 （2004） 903]. A general finite transformation group is obtained based on the full Lie point symmetry, Furthermore, two new types of similarity reduction solutions are obtained.

关键词： Lie symmetry similarity reductions potential vorticity equation

The study of fuzzy chaotic neural network based on chaotic method

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哈尔滨工程大学学报 2006年第B7期27卷 64-70页

作者： WANG Ke-jun tang Mo ZHANG yan College of Automation Harbin Engineering University Harbin 150001 China

This paper proposes a type of Fuzzy Chaotic Neural Network (FCNN). Firstly, the model of recurrent fuzzy neural network (RFNN) is considered, which adds a feedback in the second layer to realize dynamic map. Then, the Logistic map is introduced into the recurrent fuzzy neural network, so as to build a Fuzzy Chaotic Neural Network (FCNN). Its chaotic character is analyzed, and then the training algorithm and associate memory ability are studied subsequently. And then, a chaotic system is approximated using FCNN;the simulation results indicate that FCNN could approach dynamic system preferably. And owing to the introducing of chaotic map, the chaotic recollect capacity of FCNN is increased.

关键词：模糊混沌神经网络数理逻辑图递归模糊神经网络混沌方法

The impacts of market reform on the market penetration of natural gas-fired electricity and renewable energy in China

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Petroleum Science 2017年第4期14卷 831-841页

作者： Li-Jing Zhu yan Li yan-yan tang Yao-Ming Li Qi Zhang Academy of Chinese Energy Strategy China University of Petroleum-BeijingBeijing 102249China

Natural gas-fired electricity(NGFE) is expected to play a more important role in the future due to its characteristics of low pollution, high efficiency and flexibility. However, its development in China is impeded by its high regulation price compared with coal power. Market reform is therefore of vital importance to promote the penetration of NGFE. The objective of this study is to analyze the impacts of market reform and the renewable electricity(RE) subsidy policy on the promotion of NGFE and RE. A dynamic game-theoretic model is developed to analyze the interaction among the NG supplier, the power sector and the power grid. Three scenarios are proposed with different policies, including a fixed regulation price of NG and electricity, real-time pricing(RTP) of NG and electricity, and subsidy targeted at RE. The results show that:(1) market reform can sharply decrease the NG price and consequently promote the development of NGFE and RE;(2) subsidy targeted at RE not only promotes the penetration of NGFE and RE, but also increases the utilization ratio of renewables significantly;(3) market reform and the subsidy also enhance consumers’ welfare by reducing their power consumption expenditure.

关键词： Natural gas-fired electricity Renewable electricity Real-time pricing Market reform Game-theoretic model

Infinitely many nonlocal symmetries and nonlocal conservation laws of the integrable modified KdV-sine-Gordon equation

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Communications in Theoretical Physics 2021年第5期73卷 18-24页

作者： Zu-feng Liang Xiao-yan tang Wei Ding Department of Physics Hangzhou Normal UniversityHangzhou 10036China School of Mathematical Sciences Shanghai Key Laboratory of PMMPEast China Normal UniversityShanghai 200062China School of Computer Science and Technology Shanghai Normal UniversityShanghai 200234China

Nonlocal symmetries related to the B?cklund transformation(BT)for the modified KdV-sine-Gordon(mKdV-SG)equation are obtained by requiring the mKdV-SG equation and its BT form invariant under the infinitesimal *** through the parameter expansion procedure,an infinite number of new nonlocal symmetries and new nonlocal conservation laws related to the nonlocal symmetries are ***,several new finite and infinite dimensional nonlinear systems are presented by applying the nonlocal symmetries as symmetry constraint conditions on the BT.

关键词： Nonlocal conservation law The modified KdV-sine-Gordon equation Nonlocal symmetry

Compiling Life-Oriented Moral Education Textbooks for Elementary Schools in China:The Mimetic Approach in Morality and Law

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ECNU Review of Education 2022年第4期5卷 720-740页

作者： yan tang Institute of Moral Education Nanjing Normal University122 Ninghai RoadGulou DistrictNanjing 210097JiangsuChina

Purpose:This study explores a novel approach to compiling life-oriented moral textbooks for elementary schools in China,specificallyfocusing onMorality and ***/Approach/Methods:Adopting Aristotle's Poetics as its theoretical perspective,this study illustrates and analyzes the mimetic approach used in compiling the life-oriented moral education textbook,Morality and ***:The mimetic approach involves imitating children's real activities,thoughts,and feelings in *** mimetic approach to compiling life-oriented moral textbooks comprises three strategies:constructing children's life events as building blocks for textbook compilation,designing an intricate textual device exposing the wholeness of children's life actions,and designing inward learning activities leading to children's ***/Value:From the perspective of Aristotle's Poetics,the approach to compilation in Morality and Law can be defined as *** the compilation activity in the life-oriented moral education textbook also can be described as a process *** this article presents a new approach to compile moral education textbooks and an innovative way to understand the nature of one compiling activity.

关键词： Aristotle's Poetics,life orientation mimesis moral education textbooks textbook compilation