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Edge-functionalized acetylene black anchoring sulfur for high-performance Li–S batteries

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Journal of Energy Chemistry 2017年第3期26卷 448-453页

作者： Wei Qin Songtao Lu Zhida Wang xiaohong wu School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

To date, most of the research on electrodes for lithium sulfur batteries has been focused on the nanostructured sulfur cathodes and achieves significant success. However, from the viewpoint of manufacturers, the nanostructured sulfur cathodes are not so promising, because of the low volumetric energy density and high cost. In this work, we obtained the low-cost, scalable, eco-friendly mass production of edge-functionalized acetylene black-sulfur(FAB-S) composites by high-energy ball-milling technique for lithium sulfur batteries. The as-prepared FAB-S composite can deliver a high initial discharge capacity of 1304 mAh/g and still remain a reversible capacity of 814 mAh/g after 200 cycles at a charge-discharge rate of 0.2 C in the voltage range of 1.7–2.7 V. The observed excellent electrochemical properties demonstrate that the cathodes obtained by the facile high-energy ball-milling method as the cathode for rechargeable Li-S batteries are of great potential because it used the sole conductive additive acetylene black(AB).Such improved properties could be attributed to the partially exfoliation of AB, which not only keeps the AB’s inherent advantage, but also increases the specific surface area and forms chemical bonds between carbon and sulfur, resulting in the accumulation of the polysulfides intermediate through both the physical and chemical routes.

关键词： Sulfur cathode Lithium–sulfur batteries Acetylene black Edge-functionalized High-energy ball-milling

Photocatalytic degradation of Rhodamine B under visible light with Nd-doped titanium dioxide films

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Journal of Rare Earths 2009年第5期27卷 739-743页

作者： wu xiaohong SU Peibo LIU Huiling QI Lili State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Applied ChemistryHarbin Institute of Technology Harbin 150001 China School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150001 China School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150001 China

Microporous titanium dioxide films were prepared by the sol-gel methods on glass substrates, using tetrabutyl titanate as source material. In order to absorb the visible light and increase the photocatalytic activities, different concentrations of neodymium ions (Nd/Ti molar ratio was 0.5%, 0.7%, 0.9%, and 1.1% respectively) were added into the sol. X-ray diffraction (XRD), X-ray photoelectron spectros-copy (XPS), and atom force microscopy (AFM) were applied to characterize the modified films. A kind of typical textile industry pollutant (Rhodamine B) was used to evaluate the photocatalytic activities of the films under visible light. The results showed that the activities of the films were improved by doping Nd ions into the sol.

关键词： titanium dioxide visible light doping ion photocatalysis Rhodamine B rare earths

The conformation alteration of mouse hepatic histones after reacting with nicotine in vitro

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Chinese Science Bulletin 2000年第9期45卷 825-830页

作者： xiaohong wu Hongfang Sun Yuanfang Liu Peking Univ Dept Tech Phys Beijing 100871 Peoples R China

UV differential spectroscopy, fluorescence spectroscopy and circular dichroism (CD) spectroscopy assays have been applied to studying the conformation alteration of mouse hepatic histones H1 and H3 after reacting with nicotine in vitro. The results indicate that their conformation changes from regular form to random form with the increasing reaction dose of nicotine. The adduction of nicotine or its metabolites with histones H1 and H3 accounts for the conformation alteration. Nicotine may affect the structure, function and expression of genes of chromosome by changing the conformation of histones.

关键词： nicotine histone conformation genotoxicity.

A Novel Approach for Energy Efficiency Prediction of Various Natural Draft Wet Cooling Towers Using ANN

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Journal of Thermal Science 2021年第3期30卷 859-868页

作者： SONG Jialiang CHEN Yongdong wu xiaohong RUAN Shengqi ZHANG Zhongqing Research Institute of Heat Transfer Technology and Equipment Hefei General Machinery Research Institute Co.LTD(HGMRI)Hefei 230031China East China Electric Power Test&Researcher Institute China Datang Corporation Science and Technology Research Institute Co.LTDHefei 230088China

Cooling tower is crucial equipment in the cool-end system of power plant and the natural draft counter-flow wet cooling tower(NDWCT)gets wide *** artificial neural network(ANN)technique is becoming an effective method for the thermal performance investigation of cooling ***,the neural network research on the energy efficiency performance of NDWCTs is not *** this paper,a novel approach was proposed to predict energy efficiency of various NDWCTs by using Back Propagation(BP)neural network:Firstly,based on 638 sets of field test data within 36 diverse NDWCTs in power plant,a three-layer BP neural network model with structure of 8-14-2 was *** the cooling number and evaporation loss of water of different NDWCTs were predicted adopting the BP *** results show that the established BP neural network has preferable prediction accuracy for the heat and mass transfer performance of NDWCT with various *** predicted cooling number and evaporative loss proportion of the testing cooling towers are in good agreement with experimental values with the mean relative error in the range of 2.11%–4.45%and 1.04%–4.52%,***,the energy efficiency of different NDWCTs can also be predicted by the proposed BP model with consideration of evaporation loss of water in cooling *** last,a novel method for energy efficiency prediction of various NDWCTs using the developed ANN model was *** energy efficiency index(EEI)of different NDWCTs can be achieved readily without measuring the temperature as well as velocity of the outlet air.

关键词： natural draft wet cooling tower artificial neural network(ANN) energy efficiency evaporation loss of water power plant

Simulation of Smith fuzzy PID temperature control in enzymatic detection of pesticide residues

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International Journal of Agricultural and Biological Engineering 2015年第1期8卷 50-56页

作者： Sun Jun Zhang Meixia Li Zhengming wu xiaohong School of Electrical and Information Engineering Jiangsu UniversityZhenjiang 212013China

Enzyme activity is easily influenced by temperature,resulting in accuracy decline of enzymatic detection of pesticide *** this study,a controller which controls the internal temperature of the pesticide residues detector was simulated and *** mathematical model of temperature control was established by the application of the heat transfer *** models with characteristics of large inertia and large hysteresis,a Smith fuzzy PID controller was proposed by combining the Smith predictor with the fuzzy PID *** PID controller,the fuzzy PID controller,and the Smith fuzzy PID controller were simulated in MATLAB,respectively in the same step signal given with amplitude of *** performance indexes(percent overshoot,settling time,and steady-state error)of various controllers were presented as follows:the PID controller(19%,250 s,0.0001),the fuzzy PID controller(11%,450 s,0.0001),and the Smith fuzzy PID controller(0%,140 s,0).From 1180 s to 1230 s,an interference signal with amplitude of 5 was added to test interference *** PID controller and the fuzzy PID controller had greater fluctuations,but the Smith fuzzy PID controller had no *** recovery time of each controller was described below:the PID controller(200 s),the fuzzy PID controller(300 s),and the Smith fuzzy PID controller(120 s).Robustness of the controller was tested by adjusting the time constant and the delay *** performance indexes of the controllers were shown as follows:the PID controller(38%,450 s,0.0001),the fuzzy PID controller(23%,880 s,0.00025),and the Smith fuzzy PID controller(1%,150 s,0).The results of simulation showed that the performance indexes of the Smith fuzzy PID controller were better than that of the other ***,the robustness and interference immunity are stronger than other controllers as *** Smith fuzzy PID controller can accurately control the internal temperature of the pesticide residues detector to provide

关键词： enzymatic detection Fuzzy PID Smith predictor simulation temperature control

Effects of microcracks on the poroelastic behaviors of a single osteon

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Science China(Physics,Mechanics & Astronomy) 2014年第11期57卷 2161-2167页

作者： wu XiaoGang WANG YanQin wu xiaohong CEN HaiPeng GUO Yuan CHEN WeiYi College of Mechanics Taiyuan University of Technology North Automatic Control Technology Research Institute

It has been suggested that microcracks do play a key role in the triggering of the bone remodeling *** order to evaluate the influence of microcracks on the poroelastic behaviors of an osteon,a finite element model is established and investigated by using the Comsol Multiphysics *** findings show that the presence of a microcrack in the osteon wall strongly modifies(enlarges)its local fluid pressure and ***,the pressure and velocity amplitudes produced in the microcracked region are larger than those of the non-cracked ***,this study can also be used for proposing a likely mechanism that bone can sense the changes of surrounding mechanical environments.

关键词： cracked permeability environments remodeling likely Figure surrounding skeleton porosity triggering

FUZZY PRINCIPAL COMPONENT ANALYSIS AND ITS KERNEL-BASED MODEL

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Journal of Electronics(China) 2007年第6期24卷 772-775页

作者： wu xiaohong Zhou Jianjiang College of Information Science ＆ Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China College of Electrical ＆ Information Engineering Jiangsu University Zhenjiang 212013 China

Principal Component Analysis(PCA)is one of the most important feature extraction methods,and Kernel Principal Component Analysis(KPCA)is a nonlinear extension of PCA based on kernel *** real world,each input data may not be fully assigned to one class and it may partially belong to other *** on the theory of fuzzy sets,this paper presents Fuzzy Principal Component Analysis(FPCA)and its nonlinear extension model,i.e.,Kernel-based Fuzzy Principal Component Analysis(KFPCA).The experimental results indicate that the proposed algorithms have good performances.

关键词： Principal Component Analysis (PCA) Kernel methods Fuzzy PCA (FPCA) Kernel PCA (KPCA)

Photoelectric properties of thin Eu^(3+)-doped TiO_2 films sensitized by cis-RuL_2(SCN)_2·2H_2O

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Rare Metals 2006年第z1期25卷 169-172页

作者： wu xiaohong QIN Wei WANG Song JIANG Zhaohua GUO Yun XIE Zhaoyang Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China National Laboratory of Vacuum & Cryogenics Technology and Physics Lanzhou 730000 China National Laboratory of Vacuum & Cryogenics Technology and Physics Lanzhou 730000 China

Thin nanocrystalline TiO2 films doped by europium ions (Eu3+) were obtained by the sol-gel method. The photoelectric properties of Eu3+-doped TiO2 film electrode sensitized by cis-RuL2(SCN)2·2H2O (L=cis-2,2′-bipyridine-4,4′-dicarboxlic acid) ruthenium complex were studied. The thin films were characterized by X-ray diffraction, atomic force microscopy and X-ray photoelectron spectroscopy. Effect of doping Eu3+ on microscopic structure and photoelectrical properties were discussed. The result shows that doping europium ions makes specific surface area of these films larger, which contributes to improving the photoelectric properties. It is found that an optimal composition doped with 0.2 mol.% Eu3+ exhibits the highest photoelectric properties. Isc is 0.37 mA·cm-2, which is 0.17 mA·cm-2 bigger than that of un-doped films; Voc is 405 mV, which is 50 mV bigger than that of un-doped films.

关键词： europium ions nanocrystalline TiO2 films photoelectric properties

Homogeneous large deformation analysis of a dielectric elastomer peristaltic actuator

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Science China(Technological Sciences) 2012年第2期55卷 537-541页

作者： wu xiaohong SUN WenJie LI Bo CHEN HuaLing ZHOU JinXiong State Key Laboratory for Strength and Vibration and School of Aerospace Xi'an Jiaotong UniversityXi'an 710049China School of Mechanical Engineering Xi'an Jiaotong UniversityXi'an 710049China

A series of isometric,radially expanding tubular units,made of dielectric elastomer with compliant electrodes,constitute a soft linear peristaltic pump with distributed actuation for transport of incompressible *** on the Gent strain energy model,this paper theoretically analyzes the homogeneous large deformation of the peristaltic *** discuss the effects of axial prestretch on the actuation of the *** then predict the maximum actuation strain of this actuator which is limited by dielectric strength of the *** results presented here extend the previous study based on linear elasticity,and can predict the electromechanical behaviors of the novel actuator at large deformations.

关键词： dielectric elastomer peristaltic pump large deformation electromechanical actuation