更新日期: 共11条
A luminescent lanthanide MOF for selectively and ultra-high sensitively detecting Pb2+ ions in aqueous solution

作者:Ji, Guanfeng;Liu, Jingjuan;Gao, Xuechuan;Sun, Wei;Wang, JinZeng;Zhao, Shenglu;Liu, ZhiLiang 来源: JOURNAL OF MATERIALS... 收录类型: EI; SCIE; SCOPUS; - 被引量:12 - 年份:2017

A luminescent lanthanide metal-organic framework [Tb(L)(H2O)(5)](n) solvents (Tb-MOF, H2L- = 3,5-dicarboxyphenol anion ligand) with a 2D network structure was synthesized. The size of the Tb-MOF single crystal can reach up to 6 mm; such large-scale single crystals of MOFs are rarely reported in the literature. Tb-MOF exhibits a strong green luminescence induced by the efficient antenna effect of the ligands. Importantly, it shows an excellent recognition ability on detecting the Pb2+ ion, which is a noxious inorganic pollutant and causes permanent damage to human health and living environments. The perfect linear correlation between the luminescence intensity of Tb-MOF and the concentration of the Pb2+ ions provides this crystal as a reliable and easy-to-use luminescent sensor, which can be applied in pollutant monitoring. As far as we know, it is the first example of a high-efficiency luminescent MOF sensor with millimeter level for detecting Pb2+ ions at a very low concentration with a detection limit down to 10(-7) M.

Distribution of primary additional errors in fractal encoding method

作者:Liu, Shuai;Fu, Weina;He, Liqiang;Zhou, Jiantao;Ma, Ming 来源: MULTIMEDIA TOOLS AND... 收录类型: EI; SCIE; SCOPUS; - 被引量:24 - 年份:2017

Today, fractal image encoding method becomes an effective loss compression method in multimedia without resolution, and its negativeness is that its high computational complexity. So many approximate methods are given to decrease the computation time. So the distribution of error points is valued to research. In this paper, by extracted primary additional error values, we first present a novel fast fractal encoding method. Then, with the extracted primary additional error values,we abstract the distribution of these values.We find that the different distribution of values denotes the different parts in images. Finally, we analyze the experimental results and find some properties of these values.The experimental results also show the effectiveness of the method.

Fractal generation method based on asymptote family of generalized Mandelbrot set and its application

作者:Liu, Shuai;Pan, Zheng;Fu, Weina;Cheng, Xiaochun 来源: JOURNAL OF NONLINEAR... 收录类型: SCIE; - 被引量:7 - 年份:2017

Generalized Mandelbrot set (k-M set) is the basis of fractal analysis. This paper presents a novel method to generate k-M set, which generates k-M set precisely by constructing its asymptote family. Correctness of the proposed method is proved as well as computational complexity is researched. Further, application of the generation method is studied, which is used to analyze distribution of boundary points and periodic points of k-M set. Finally, experiments have been implemented to evaluate the theoretical results. (C)2017 All rights reserved.

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