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Fabrication of anti-fouling polyamide nanofiltration membrane by incorporating streptomycin as a novel co-monomer

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Chinese Journal of Chemical Engineering 2022年第10期50卷 185-196页

作者： Shujie Guo jiao du Fangzheng Yan Zhi Wang Jixiao Wang Chemical Engineering Research Center School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Tianjin Key Laboratory of Membrane Science and Desalination Technology State Key Laboratory of Chemical EngineeringCollaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin 300350China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300350China

Polyamide(PA)thin-film composite(TFC)na nofiltration(NF)membrane has extremely broad application prospects in separation of monovalent/diva lent inorganic salts mixed solutio ***,membrane fouling is the main obstacle to the application of PA,TFC and NF ***(SM)is a hydrophilic antibiotic containing a large number of hydroxyl and amino *** this work,the NF membrane was prepared via interfacial polymerization(IP)between trimesoyl chloride(TMC)in the organic phase and SM/piperazine(PIP)mixture in the aqueous *** NF membrane structure and performance were characterized in *** results showed that SM successfully participated in the *** negative charge and hydrophilicity of membrane surface were *** prepared membrane exhibited good anti-adhesion and anti-bacterial performance,Additionally,when the SM concentration was 2%,the prepared membrane exhibited the optimal *** water permeance was 89.4L·m^(-2)·h^(-1)·MPa^(-1).The rejection of NaCl and Na_(2)SO_(4) were 17,17%and 97.84%,*** NaCl/Na_(3)SO_(4) separation factor of the SM2-PIP/TMC membrane in 1000 mg·L^(-1) NaCl and 1000 mg·L^(-1)Na_(2)SO_(4) mixed solution was 40,which was 3.3 times that of PIP/TMC *** indicated that SM2-PIP/TMC demonstrated excellent monovalent/divalent salts separation *** work provided an easy and effective approach to preparing anti-fouling NF membrane while possessing superior monovalent/divalent salts separation performance.

关键词： Streptomycin Polyamide Nanofiltration membrane Anti-adhesion Anti-bacterial

The Existence of a Class of Balanced Multi-output Rotation Symmetric Boolean Functions

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Chinese Journal of Electronics 2018年第5期27卷 995-1001页

作者： du jiao FU Shaojing QU Longjiang LI Chao PANG Shanqi College of Mathematics and Information Science Henan Normal University Henan Engineering Laboratory for Big Data Statistical Analysis and Optimal Control Henan Normal University College of Computer Science National University of Defense Technology College of Liberal Arts and Science National University of Defense Technology

A new characterization of balanced rotation symmetric（n, m）-functions is presented. Based on the characterization, the nonexistence of balanced rotation symmetric（p;, m）-functions is determined, where p is an odd prime and m ≥ 2. And there exist balanced rotation symmetric（2;, m）-functions for 2 ≤ m ≤ 2;-r. With the help of these results, we also prove that there exist rotation symmetric resilient（2;, m）-functions for 2 ≤ m ≤ 2;-r-1.

关键词： Cryptography Rotation symmetric Orbit matrix Correlation immune Resilient functions

Construction and Count of 1-Resilient Rotation Symmetric Boolean Functions on pr Variables

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Chinese Journal of Electronics 2014年第4期23卷 816-820页

作者： du jiao PANG Shanqi WEN Qiaoyan LIAO Xin College of Mathematics and Information Science Henan Normal University State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications College of Information Science and Engineering Hunan University

Construction and count of 1-resilient Rotation symmetric Boolean functions(RSBFs) on p r variables are demonstrated. It is proved that constructions of1-resilient RSBFs on p r variables are equivalent to solving an equation system. An accurate enumeration formula of all 1-resilient RSBFs on p r variables is also proposed. Some examples are given, and the exact numbers of 1-resilient RSBFs on 8 and 9 variables are obtained respectively.

关键词： Cryptography Rotation symmetric Support table Correlation-immune Resilient functions

Construction of a Class of Quantum Boolean Functions Based on the Hadamard Matrix

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Acta Mathematicae Applicatae Sinica 2015年第4期31卷 1013-1020页

作者： jiao du Shan-qi PANG Qiao-yan WEN Jie ZHANG College of Mathematics and Information Science Henan Normal University Henan Engineering Laboratory for Big Data Statistical Analysis and Optimal Control Henan Normal University State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications School of Science Beijing University of Posts and Telecommunications

In this study, a new methodology based on the Hadamard matrix is proposed to construct quantum Boolean functions f such that f ： I2n --2P2n, where I2n is an identity matrix of order 2n and P2n is a projective matrix ... 详细信息

关键词： quantum information matrix image quantum boolean function projective matrix

New constructions of q-variable 1-resilient rotation symmetric functions over Fp

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Science China(Information Sciences) 2016年第7期59卷 240-242页

作者： jiao du Shaojing FU Longjiang QU Chao LI Shanqi PANG College of Science National University of Defense Technology School of Mathematics and Information Science Henan Normal University Henan Engineering Laboratory for Big Data Statistical Analysis and Optimal Control Henan Normal University College of Computer Science National University of Defense Technology

Dear editor,Motivated by Refs.[1–10],we devote to constructing a class of q-variable 1-resilient rotation symmetric functions（RSFs）over the finite field F;={0,1,...,p-1}in this *** this letter,let p and q be differ... 详细信息

关键词： over New constructions of q-variable 1-resilient rotation symmetric functions over F_p

New predistorter using triangular memory polynomial for power amplifier of OFDM-based wireless broadband communication system

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The Journal of China Universities of Posts and Telecommunications 2012年第2期19卷 43-47页

作者： YU Cui-ping LIU Yuan-an du Tian-jiao LI Shu-lan School of Electronic Engineering Beijing University of Posts and TelecommtmicationsBeijing 100876Chma

A triangular memory polynomial （TMP） predistorter is presented in this paper to linearize a power amplifier＇s nonlinear with memory effects. Compared with the traditional memory polynomial （MP） predistorter, the coefficients of TMP predistorter is reduced more than 75%, which can effectively decrease the implementation complexity. The coefficients of predistorter are directly extracted from an offline system identification process by an open-loop structure in our approach. Several signals with data rate 5 MHz, 10 MHz, 15 MHz and 20 MHz are used to verify the performance of the proposed predistorter. Experimental results show that the proposed TMP predistorter and the traditional MP predistorter almost have the same performance.

关键词： power amplifier predistortion memory effects memory polynomial

dual-Band Terahertz Left-Handed Metamaterial with Fishnet Structure

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Chinese Physics Letters 2011年第1期28卷 90-93页

作者： du Qiu-jiao LIU Jin-Song WANG Ke-Jia YI Xu-Nong YANG Hong-Wu Wuhan National Laboratory for Optoelectronics School of Optoelectronic Science and Engineering Huazhong University of Science and Technology Wuhan 430074 School of Mathematics and Physics China University of Geosciences Wuhan 430074 School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074

We present the design of a dual-band left-handed metamaterial with fishnet structure in the terahertz regime. Its left-handed properties are described by the retrieved effective electromagnetic parameters. We introduce an equivalent circuit which offers a theoretical explanation for the left-handed behavior of the dual-band fishnet metamaterial, and investigate its losses receiving- higher figure of mcrit, The design is beneficial to the development of frequency agile and broadband THz materials and devices＇. The dual-band fishnet metamaterial can be extended to infrared and optical frequency ranges by regulating the structural parameters.

关键词： Accelerators beams and electromagnetism Condensed matter: electrical magnetic and optical Optics quantum optics and lasers

Selective extraction of dimethoate from cucumber samples by use of molecularly imprinted microspheres

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Journal of Pharmaceutical Analysis 2015年第3期5卷 200-206页

作者： jiao-jiao du Rui-Xia Gao Hu Yu Xiao-Jing Li Hui Mu Department of Chemistry School of ScienceXi'an Jiaotong University

Molecularly imprinted polymers for dimethoate recognition were synthesized by the precipitation polymerization technique using methyl methacrylate （MMA） as the functional monomer and ethylene glycol dimethacrylate （EGDMA） as the cross-linker. The morphology, adsorption and recognition properties were investigated by scanning electron microscopy （SEM）, static adsorption test, and competitive adsorption test. To obtain the best selectivity and binding performance, the synthesis and adsorption conditions of MIPs were optimized through single factor experiments. Under the optimized conditions, the resultant polymers exhibited uniform size, satisfactory binding capacity and significant selectivity. Furthermore, the imprinted polymers were successfully applied as a specific solid-phase extractants combined with high performance liquid chromatography （HPLC） for determination of dimethoate residues in the cucumber samples. The average recoveries of three spiked samples ranged from 78.5% to 87.9% with the relative standard deviations （RSDs） less than 4.4% and the limit of detection （LOD） obtained for dimethoate as low as 2.3 μg/mL.

关键词： Mol^alarly imprintedpolymer ,Precipitation polymeriza-tion Dimethoate Cucumber HPLC

Facile carbonaceous microsphere templated synthesis of Co3O4 hollow spheres and their electrochemical performance in supercapacitors

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Nano Research 2013年第2期6卷 87-98页

作者： Hongmei du Lifang jiao Qinghong Wang Jiaqin Yang Lijing Guo Yuchang Si Yijing Wang Huatang Yuan Institute of New Energy Material Chemistry Key Laboratory of Advanced Energy Materials Chemistry (MOE) Tianjin Key Lab of Metal and Molecule-based Material Chemistry Nankai University Tianjin 300071 China

Co3O4 hollow spheres assembled from nanoparticles have been successfully synthesized by a one-pot hydrothermal carbonization and calcination method. In this method, carbon spheres obtained through hydrothermal carbonization at a low temperature of 140 ℃ are used as sacrificial templates. The carbonization process was monitored by Fourier transform infrared spectroscopy （FT-IR） and Raman spectroscopy. Both the carbon sphere soft templates and the NH3 released from hexamethylenetetramine play key roles in the formation of these novel hollow structures. The formation of the Co3O4 hollow spheres using hydrothermal carbon spheres as templates can be attributed to the synergetic effect of metal ion adsorption and heterogeneous nucleation of Co（OH）2, which is different from the traditional adsorption theory. The as-obtained Co3O4 hollow microspheres exhibit excellent cycling performance and good rate capacity when used as electrode materials in supercapacitors, which can be attributed to the small particle size of Co3O4 and the sufficient space available to interact with the electrolytes. This facile strategy may be extended to synthesize other metal oxide hollow spheres, which may find application in sensors and catalysts due to their unique structural features.

关键词： hydrothermal carbonization calcination hollow spheres adsorption supercapacitors