Turing structures and stability for the 1-D Lengyel–Epstein system

This paper continues the analysis on the Lengyel–Epstein reaction- diffusion system of the chlorite-iodide-malonic acid-starch (CIMA) reaction for the rich Turing structures. The steady state structures, especially the double bifurcation one, and their stability and multiplicity are studied by the use of Lyapunov–Schmidt reduction technique and singularity theory. Numerical simulations are presented to support our theoretical studies. The results show that the richer stationary Turing patterns heavily rely both on the size of the reactor and on the effective diffusion rate in the CIMA reaction.     

Synthesis and characterization of phenol‐based biaryl proton conducting polymers

Biaryl hydroxy polymers with orthogonal disposition of proton transporting ? OH moieties have been synthesized via conventional free radical polymerization. The polymers are characterized for their thermal stability and proton conductivity, and the results are compared with the corresponding styrenic hydroxy polymers. The orthogonal disposition of ? OH moieties in biaryl polymers does result in lower E_a for proton transport. However, the lower E_a values in biaryl polymers did not translate into a net increase in proton conductivity. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012     

AMS theme collection on “Mechanics of Nanomaterials”

正This themed collection on Mechanics of Nanomaterials consists of five papers, including one review article. With our ability to control and manipulate matter at atomic level developed with the invention of atomic force microscope since 1980s, novel materials with feature size ranged from a few nanometer to hundreds of nanometer     

香豆素、罗丹明衍生物和DCM激光染料分子间的激发能传递

通过考察香豆素4-DCM、香豆素481-DCM、否豆素540A-罗丹明6G、香豆素540A-罗丹明640在乙醇、乙二醇等极性溶剂中的激发光谱和荧光发射光谱,研究了它们之间的激发能传递过程。     

低温下使用的金刚石对顶砧高压盒和显微光谱系统

自Bridgeman发明套筒活塞高压装置以来,特别是引入金刚石压砧后,高压物理学发展迅速。这种金刚石对顶砧压力盒,简称为DAC,为研究高压下材料的光学性质提供了极大的方便。为进行高压低温研究,目前国内都是将压机浸入液氮中,或向DAC喷浇液氮。这样只能在77K恒温,且必须取出压机后才能加压。     

制备XS(X=Ca,Sr)的一种优化工艺

本文利用一种新的制备工艺进行了XS(X=Ca,Sr)基质发光材料的合成;利用X-射线衍射等手段进行了反应效率、产物纯度、化学稳定性和材料的结晶学参数等研究实验结果表明,该方法比目前广泛采用的工艺具备更多优点。     

关于Halpern的一个定理

设M是闭的.连通的,光滑的m形,m>2, f映射,P二}xEM[f'(二)=二,对某个;,15r2的周期 本文利用复迭空间的概念推广     

1.3μm场助TE光阴极In1-xGaxAsyP1-y/InP的能带计算及外延层的设计

本文首先简述了1.3μm场助TE光阴极InP(衬底)/In_1-xGa_xAs_yP_1-y(光吸收层)/InP(发射层)/Ag/CsO的工作原理,并对其能带结构进行了计算,得到了In_1-xGa_xAs_yP_1-y(光吸收层)/InP(发射层)的势垒高度、掺杂、InP发射层厚度、组份、渐变区宽度,偏压及耗尽层宽度间的定量关系。并由此出发,对光阴极各参数的设计进行了分析讨论。