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A Direct Algebraic Method in Finding Particular Solutions to Some Nonlinear Evolution Equations

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Communications in Theoretical Physics 2004年第1X期42卷 74-78页

作者： LIUChun-Ping CHENJian-Kang CAIFan InstituteofMathematics YangzhouUniversityYangzhou225002China HydraulicandCivilEngineeringCollege YangzhouUniversityYangzhou225002China

Firstly, a direct algebraic method and a routine way in finding traveling wave solutions to nonlinear evolution equations are explained. And then some new exact solutions for some evolution equations are obtained by u... 详细信息

关键词：代数理论非线性展开方程精确解行波解伯格斯方程

A Forbidden Web in a Quasi-Dissipative System

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Chinese Physics Letters 2005年第4期22卷 827-829页

作者：戴俊王文秀姜玉梅何阅陈文何大韧 CollegeofPhysicsScienceandTechnology YangzhouUniversityYangzhou225002

A simultaneous transition of the system nature from everywhere smooth andconservative to piecewise smooth and quasi-dissipative is observed in a kicked billiard whenadjusting single controlling parameter. The transition induces the appearance of a special kind offat fractal forbidden web, which grows up and cuts off more parts from the original conservativestochastic web so that the remnant transient web becomes increasingly thinner. We numerically show apower law alpha proportional to beta(v), where a is the fractal exponent of the forbidden web, betais the control parameter, and the scaling exponent v = 0.288 +/- 0.007, which describes thisprocess.

关键词： FAT FRACTALS CRISIS

The Catalysis of Sodium Dodecyl Sulfate/1-Pentanol/Water W/O Microemulsion on the Photoisomerization of trans-Stilbene

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Chinese Chemical Letters 2004年第6期15卷 691-694页

作者： XiaGUO LingLIN RongGUO Schoolofchemistryandchemicalengineering YangzhouUniversityYangzhou225002

The photoisomerization of trans-stilbene was studied in the water in oil (W/O) micro-emulsion formed by SDS (sodium dodecyl sulfate), n-C5H11OH (1-pentanol) and H2O. The experimental results show that after 2-minute U... 详细信息

关键词： trans-Stilbene 1-pentanol photoisomerization microemulsion.

ELECTROCHEMICAL POLYMERIZATION OF ANILINE IN PHOSPHORIC ACID AND THE PROPERTIES OF POLYANILINE

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Chinese Journal of Polymer Science 2004年第5期22卷 405-415页

作者：穆绍林 YongKong JunWu DepartmentofChemistry YangzhouUniversityYangzhou225002China

The behavior of the electrochemical polymerization of aniline in a weak acid, phosphoric acid, is very similar to that in strong acids, i.e. its polymerization rate increases quickly with the electrolysis time. The FTIR spectra of polyaniline samples synthesized in phosphoric acid indicate that the counter ion H2PO4- is present in both the oxidized form and the reduced form of polyaniline. The counter ion plays an important role in adjusting the pH value at the electrode surface of polyaniline during the oxidation and reduction processes. As a result, a pair of redox peaks still appear in cyclic voltammograms of polyaniline in a solution of sodium sulfate of pH 5.5 and in a solution of NaH2PO4 of pH 7.0, respectively, at low potential scan rate; and the color of polyaniline film also changes with applied potential at pH 7.0. Thus, the pH region for the electrochemical activity and the electrochromism of polyaniline is extended to pH 5.5 for a solution of sodium sulfate and to pH 7.0 for a solution of NaH2PO4. The conductivity of polyaniline is 3.3 S cm-1, depending on the concentration of phosphoric acid used in the stage of polymerization of aniline. The result of elemental analysis of polyaniline is presented here.

关键词： Electrochemical polymerization Polyaniline Spectroelectrochemistry FTIR spectra Elemental analysis

Analysis of Crisis for Producing Supertransients

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Chinese Physics Letters 2005年第3期22卷 551-553页

作者：申影姜玉梅何阅戴俊何大韧 CollegeofPhysicsScienceandTechnology YangzhouUniversityYangzhou225002

We report a crisis that is induced by an escape from a fat strange set formedby the forward images of an oscillating discontinuity borderline. It is analytically andnumerically shown that the iteration lifetime obeys the universal power-law dependence on thecontrolling parameter and the scaling exponent takes an exceptional large value, i.e. nu = 1.72 +/-0.04. The strange repeller, which appears after the crisis, is also a fat fractal. To our knowledge,this is the first example for a new mechanism that produces supertransients.

关键词： CHAOTIC ATTRACTORS INTERMITTENCY SYSTEMS

Effect of Organic Ligands on Biological Availability of Inorganic Phosphorus in Soils

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Pedosphere 2004年第1期14卷 85-92页

作者： FENGKe LUHai-Ming SHENGHai-Jun WANGXiao-Li MAOJian AgriculturalCollege YangzhouUniversityYangzhou225009（China）

Citrate, oxalate, tartrate and malate were added into soils during the growthperiod of ryegrass to study the effect of different organic ligands on the release of variousinorganic P (Pi) fractions in a yellow-brown soil and a paddy soil. The results showed that oxalatewas most effective in promoting the release of total Pi in the yellow-brown soil and tartrate in thepaddy soil. The dominant Pi fractions released from the yellow-brown soil were calcium phosphate(Ca-P) and aluminum phosphate (Al-P) and those from the paddy soil were iron phosphate (Fe-P) andreductant soluble phosphate (O-P) mobilized by tartrate. Phosphorous-mobilizing capability oforganic acids in the yellow-brown soil revealed the following order: oxalate > citrate > malate >tartrate. In the paddy soil, the order was tartrate > citrate ≈ oxalate > malate. It wasdemonstrated that organic ligands were different in their capabilities of mobilizing Pi and the sameorganic ligand showed also a discrepancy in mobilizing P in different soils. Although the additionof organic ligands into soils could increase the amount of P taken up by ryegrass, the more uptakeof P, however, was not only due to the more release of Pi, but also partly from organic P. In manycases, organic ligands promoted the release of the total Pi, while different fractions showeddifferent trends: some increased and others decreased.

关键词： biological availability inorganic P release organic ligands ryegrass

New Doubly Periodic Solutions for the Coupled Nonlinear Klein-Gordon Equations

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Communications in Theoretical Physics 2005年第1期43卷 13-16页

作者： LIUChun-Ping InstituteofMathematics YangzhouUniversityYangzhou225002China

By using the general solutions of a new coupled Riccati equations, a direct algebraic method is described to construct doubly periodic solutions (Jacobi elliptic function solution) for the coupled nonlinear Klein-Gordon *** is shown that more doubly periodic solutions and the corresponding solitary wave solutions and trigonometric function solutions can be obtained in a unified way by this method.

关键词： nonlinear klein-gordon equation coupled riccati equations doubly periodicsolution algebraic method

Synthesis of Calix[4]resorcinarene Amide Derivatives

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Chinese Chemical Letters 2004年第9期15卷 1019-1021页

作者： ChaoGuoYAN YunGE CollegeofChemistry＆ChemicalEngineering YangzhouUniversityYangzhou225002

Three different synthetic routes were developed to introduce carbamoyloxy functional groups at the upper periphery of two calix[4]resorcinarenes. By treating activated esters 2a-b with excess corresponding amine such as 3-(dimethylamino)propylamine 3, -phenethylamine 4 and triethylenetetramine 5, six amide derivatives 6a^8b were obtained in high yield (Route 1). The pyridine-linked amide derivatives 9a-b were prepared by using acid chloride intermediate (Route 2). The amide derivatives 10a-b were obtained in moderate yields by direct alkylation of phenolic hydroxyl groups of 1a-b with N,N-dipropylchloroacetoamide in the presence of K2CO3/KI in acetone (Route 3).

关键词： Calixresorcinarene amide supramolecular chemistry.

Relationship Between Soliton-like Solutions and Soliton Solutions to a Class of Nonlinear Partial Differential Equations

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Communications in Theoretical Physics 2005年第6期43卷 969-974页

作者： LIUChun-Ping LINGZhi InstituteofMathematics YangzhouUniversityYangzhou225002China

By using the generally projective Riccati equation method, a series of doubly periodic solutions (Jacobi elliptic function solution) for a class of nonlinear partial differential equations are obtained in a unified way. When the module m → 1, these solutions exactly degenerate to the soliton solutions of the equations. Then we reveal the relationship between the soliton-like solutions obtained by other authors and these soliton solutions of the equations.

关键词： nonlinear partial differential equation doubly periodic solution soliton solution