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一种推广的共轭性条件及相关共轭梯度法
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作者 赵晖 《泰山学院学报》 2003年第3期11-16,共6页
 对Dai引入的共轭性条件进行了推广,同时建立了一种新的共轭梯度方法,并进一步分析了这种方法的全局收敛性.给出了数值实验,实验结果表明这种方法具有良好的数值表现.
关键词 无约束优化 共轭性条件 相关共轭梯度法 全局收敛 迭代公式 线搜索
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Survey of recent advances of in the field of π-conjugated heterocyclic azomethines as materials with tuneable properties 被引量:1
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作者 BOLDUC Andréanne MALLET Charlotte SKENE W. G. 《Science China Chemistry》 SCIE EI CAS 2013年第1期3-23,共21页
This account gives an overview of our recent work in the area of conjugated azomethines derived from 2-aminothiophenes.It will be presented that mild reaction conditions can be used to selectively prepare symmetric an... This account gives an overview of our recent work in the area of conjugated azomethines derived from 2-aminothiophenes.It will be presented that mild reaction conditions can be used to selectively prepare symmetric and unsymmetric conjugated azomethines.It further will be demonstrated that azomethines consisting of various 5-membered aryl heterocycles lead to chemically,reductively,hydrolytically,and oxidatively robust compounds.The optical and electrochemical properties of these materials can be tuned contingent on the degree of conjugation,type of aryl heterocycle,and by including various electronic groups.The end result is materials having colors spanning 250 nm across the visible spectrum.These colors further can be tuned via electrochemical or chemical doping.The resulting doped states have high color contrasts from their corresponding neutral states.The collective opto-electronic properties and the means to readily tune them,make thiophenoazomethine derivatives interesting materials for potential use in a gamut of applications. 展开更多
关键词 review azomethines electronic push-pull ELECTROCHROMISM polymers THIOPHENE conjugated materials X-ray crystallography
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