The synthesis and properties of three kinds of hyper-dispersants are studied in this paper, which are non-terminated, carboxyl-terminated and polyethylene imine grafted poly(hydroxyl carboxylic acid) ester. The hype...The synthesis and properties of three kinds of hyper-dispersants are studied in this paper, which are non-terminated, carboxyl-terminated and polyethylene imine grafted poly(hydroxyl carboxylic acid) ester. The hyper-dispersants are synthesized by the materials of 12-hydroxy-stearic acid, stearic acid and polyethylene imine, which are used to improve the dispersion properties of nano titanium dioxide (nano-TiO2) in low-concentration resin solution system. The influences of hyper-dispersants on the viscosity and stability of the system are studied. It is found that polyethylene imine grafted hyper-dispersant has the best dispersion performance in nano-TiO2 dispersion system, and the optimal content of the hyper-dispersant is 4%.展开更多
已有研究通过对比实验发现,Laplacian分量绝对和(SML,Sum of Modified Laplacian)指标在众多的图像域清晰度指标中效果最佳。但现有的基于SML指标的多焦距图像融合算法采用了基于分块的融合决策策略,使融合结果存在明显的块效应。对此,...已有研究通过对比实验发现,Laplacian分量绝对和(SML,Sum of Modified Laplacian)指标在众多的图像域清晰度指标中效果最佳。但现有的基于SML指标的多焦距图像融合算法采用了基于分块的融合决策策略,使融合结果存在明显的块效应。对此,本文提出一种改进方法,该方法逐像素进行融合决策,决策依据是每个像素邻域上的SML指标值。实验结果表明,所提方法能有效克服块效应,并且可以取得优于现有基于SML指标融合算法的融合效果。展开更多
基金supported by the Shanghai Leading Academic Disciplines (Grant No.T0105)the Key Laboratory of Science & Technology of Eco-Textile (Donghua University), Ministry of Education of China
文摘The synthesis and properties of three kinds of hyper-dispersants are studied in this paper, which are non-terminated, carboxyl-terminated and polyethylene imine grafted poly(hydroxyl carboxylic acid) ester. The hyper-dispersants are synthesized by the materials of 12-hydroxy-stearic acid, stearic acid and polyethylene imine, which are used to improve the dispersion properties of nano titanium dioxide (nano-TiO2) in low-concentration resin solution system. The influences of hyper-dispersants on the viscosity and stability of the system are studied. It is found that polyethylene imine grafted hyper-dispersant has the best dispersion performance in nano-TiO2 dispersion system, and the optimal content of the hyper-dispersant is 4%.
文摘已有研究通过对比实验发现,Laplacian分量绝对和(SML,Sum of Modified Laplacian)指标在众多的图像域清晰度指标中效果最佳。但现有的基于SML指标的多焦距图像融合算法采用了基于分块的融合决策策略,使融合结果存在明显的块效应。对此,本文提出一种改进方法,该方法逐像素进行融合决策,决策依据是每个像素邻域上的SML指标值。实验结果表明,所提方法能有效克服块效应,并且可以取得优于现有基于SML指标融合算法的融合效果。