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Comparative study of multi-walled carbon nanotubes modified by a hydrophilic polymer with different approaches

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Comparative study of multi-walled carbon nanotubes modified ...

5th East-Asian Polymer Conference

作者： Jun Qiu Guojian Wang school of Materials science and engineering Tongji university Shanghai 200092 PR china

The multiwalled carbon nanotubes （MWNTs） modified by a hydrophilic polymer were prepared with polymerization and blending approaches. The differences of both modified MWNTs were compared by Fourier transform infrared and Raman spectroscopies, thermogravimetric analysis and transmission electron microscopy. Chemical grafting reaction had occurred between MWNTs and polyvinyl pyrrolidone （PVP） after modification with polymerization and blending approaches. Polymerization modification can graft more PVP on the surface of MWNTs compared with blending modification. Polymerization modification of MWNTs belongs to"grafting from" approach, while blending modification belongs to "grafting to"approach . Modified MWNTs exhibit remarkable solubility in water, ethanol and dimethyl formamide.

关键词： Nanomaterials Multiwalled carbon nanotubes Modification Polymers Surfaces

Research on the Performance of Feed Forward Neural Network Based Temperature Field Identification Model in Intelligent Building

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Research on the Performance of Feed Forward Neural Network B...

2011 3rd International Conference on Computer Research and Development(ICCRD 2011)

作者： Zhenya Zhang Key Laboratory of Intelligent Building of Anhui Province Anhui university of Architecture Hefei china Hongmei Cheng school of Management Anhui university of Architecture Hefei china Shuguang Zhang school of Management university of science and technology of china Hefei china

The identification of temperature filed of monitored region is one of the key steps for the energy efficiency management in intelligent building. In this paper, the identification of temperature field in monitored region is formalized as one optimization problem. With the formalization, a feed forward neural network is used to identify the temperature field of monitored region in an intelligent building. To improve the performance of the identification model, input data of the desired neural network is normalized with minimum - maximum method as middle result and the normalization image of the input data is the stereographic projection of the middle result. To test the performance of our proposed identification model, temperature matrix for the infrared photograph is used in our experiment. BP and RBF neural network is used as the desired neural network. Experiment results show that the performance of BP based temperature field identification model running with data preprocessed by stereographic projection and minimum - maximum method for the identification of temperature field in monitored region is better.

关键词： temperature field identification neural network stereographic projection

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飞行器控制系统的自适应容错控制

武汉理工大学学报 2009年第5期31卷 106-109页

作者：周静黄心汉华中科技大学控制科学与工程系武汉430074 江汉大学数学与计算机学院武汉430056

建立了某型号导弹在纵向平面内的闭环控制系统模型,通过设计PID控制器参数,使该闭环系统具有一定的容错能力。然后,在被控系统中加入自适应模块,当执行器出现故障时,被控系统的容错能力得到很好的改善。同时,为降低加入自适应控制后系... 详细信息

建立了某型号导弹在纵向平面内的闭环控制系统模型,通过设计PID控制器参数,使该闭环系统具有一定的容错能力。然后,在被控系统中加入自适应模块,当执行器出现故障时,被控系统的容错能力得到很好的改善。同时,为降低加入自适应控制后系统的复杂性,利用了实际系统与理论模型之间的输出残差来判断系统是否出现故障:当残差小于一定的阈值时,单纯采用PID控制;否则加入自适应控制。仿真结果证明了加入自适应控制的有效性。

关键词：故障检测容错控制自适应控制

Preparation of Sesame-style Fake Granite Coating from Celadon Cinder and Mica-slice

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Preparation of Sesame-style Fake Granite Coating from Celado...

2011 IEEE International Conference on Waste Recycling,Ecology and Environment(ICWREE 2011)

作者： Peng FU Yuequan DENG* Faqin DONG Jianghong HE Yuzhen ZHON Na LI school of Material science and engineering Southwest university of science and technology Mianyang china

A new method was presented to prepare a sesame-style fake granite coating from celadon cinder and mica-slice in this paper. The celadon cinder was used as the background pigment with 10% ratio. The white micaslice （2mm）, white mica-slice （1mm）, black mica-slice （2mm）, black mica-slice （1mm）, brown mica-slice （1mm） and brown mica-slice （1mm） were used for color matching with the addition of 0.5%, 0.5%, 1.5%, 1.5%, 1.5% and 1.5%, respectively. The film system of coating was composed of Styrene-acrylic latex, HPMC and Methyl Cellulose, with the amount of 12.5%, 2.5‰ and 2.5‰, respectively. The corresponding construction craft was designed. A sesame-style fake granite wall coating was obtained with Cross-linking type of fluorocarbon resin adopted for wall varnish, whereafter, a sesame-style fake granite ground coating was acquired with epoxy resin adopted for ground varnish. The product has higher simulation, better adornment effect and better application prospect.

关键词： celadon cinder mica slice sesame-style fake granite coating preparation

Study on preparation and property of carrying silver B2O3-SiO2-Na2O antibacterial glass material

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Study on preparation and property of carrying silver B2O3-Si...

2005年国际玻璃讨论会暨国际玻璃协会年会

作者： Xu Ying ab Cheng Jinshub Liu Xiaomingb Gao Deqianga) a school of science Wuhan university of technology (WUT) Wuhan 430070 china. Key Laboratory of Silicate Materials science and engineering Ministry of Education Wuhan university of technology Wuhan 430070 china.

Carrying silver B2O3-SiO2-Na2O antibacterial glass had been prepared by melting method. The deoxidization of Ag+ was restrained through the methods in this paper. The properties and stucture of the ma

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Thermodynamic conditions of framework grain dissolution of clastic rocks and its application in Kela 2 gas field

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science china Earth sciences 2005年第1期48卷 21-31页

作者： LAI Xingyun, YU Bingsong, CHEN Junyuan, CHEN Xiaolin, LIU Jianqing, MEI Mingxiang, JING Weiguang & CHENG Suhua school of Earth sciences and Mineral Resources, china university of Geosciences, Beijing 100083, china Key Laboratory of Lithospheric Tectonics, Deep-level Process and Exploration of Ministry of Education, Beijing 100083, china china university of Geosciences School of Earth Sciences and Mineral Resources Beijing China Key Laboratory of Lithospheric Tectonics Deep-level Process and Exploration of Ministry of Education Beijing China

Feldspar and clastic debris are the most important constituent framework grains of sedimentary clastic rocks and their chemical dissolution plays an essential role in the formation and evolution of the secondary pore in the reservoir rocks. On the basis of thermodynamic phase equilibrium, this study investigates the chemical equilibrium relationships between fluid and various plagioclase and K-feldspar in diagenesis of the sediments, particularly, the impact of temperature and fluid compositions (pH, activity of K+, Na+, Ca2+ and so on) on precipitation and dissolution equilibria of feldspars. Feldspar is extremely easily dissolved in the acid pore water with a low salinity when temperature decreases. The dissolution of anorthite end-member of plagioclase is related to the Ca content of the mineral and the fluid, higher Ca either in the mineral or in the fluid, easier dissolution of the feldspar. Moreover, the dissolution of albite end-member of plagioclase is related to Na of both the mineral and fluid, lower Na out of both the mineral and fluid, easier dissolution of the mineral. Similarly, lower-K fluid is more powerful to dissolve K-feldspar than the higher. The anorthite component of plagioclase is most easily dissolved in ground water-rock system, the albite is the secondary, and K-feldspar is the most stable. Selective dissolution of plagioclase occurs in diagenesis because of the plagioclase solid solution that is mainly composed of albite and anorthite end-members, Ca-rich part of which is preferentially dissolved by the pore water, in contrast to the Na-rich parts. Based on investigation of reservoir quality, secondary pore, dissolution structures of feldspar, clay minerals and ground water chemistry of the Kela 2 gas field of Kuqa Depression in the Tarim basin of Western china, we discovered that the secondary pore is very well developed in the highest quality section of the reservoir, and the plagioclase of which was obviously selectively dissolved, in c

关键词： dissolution of feldspar, thermodynamic conditions, groundwater pore chemistry, Kela 2 gas field.

Products of Toeplitz Operator on the Weighted Bergman Space of the Unit Ball

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Journal of Mathematical Research with Applications 2012年第4期32卷 439-449页

作者： Kan ZHANG 1,2,Yufeng LU 1, 1.school of Mathematical sciences,Dalian university of technology,Liaoning 116024,P.R.china 2.College of sciences,Shenyang Agricultural university,Liaoning 110866,P.R.china school of Mathematical sciences Dalian University of Technology Liaoning 116024

We consider the question for what kind of square integrable holomorphic functions f,g on the unit ball the densely defined products TfTg-are invertible and Fredholm on the weighted Bergman space of the unit *** furthermore obtain necessary and sufficient conditions for bounded Haplitz products HfTg-,where f∈L2(Bn,dvα) and g is a square integrable holomorphic function.

关键词： Toeplitz operator Bergman space unit ball Hankel operator.

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软件工程专业实践能力培养体系设计探讨

实验科学与技术 2011年第S1期9卷 247-249,268页

作者：陆鑫傅彦电子科技大学示范性软件学院成都611731

软件工程专业是一个实践性非常强的工程型专业,该专业培养目标主要是造就符合产业需求的软件工程师人才。在专业人才培养过程中,专业实践能力培养模式与体系是十分关键的要素。文章在分析软件工程专业卓越工程师能力培养要求基础上,探... 详细信息

软件工程专业是一个实践性非常强的工程型专业,该专业培养目标主要是造就符合产业需求的软件工程师人才。在专业人才培养过程中,专业实践能力培养模式与体系是十分关键的要素。文章在分析软件工程专业卓越工程师能力培养要求基础上,探讨软件工程专业的实践能力培养模式,给出专业实践能力培养体系方案。结合CDIO工程教育理念,提出以专业实践能力培养为导向的专业评价手段。以期待这些专业实践能力培养工作对提高软件人才培养质量起到积极的促进作用,并实现人才培养与产业需求零距离对接。

关键词：软件工程培养体系实践能力 CDIO理念

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聚苯胺-碳纳米管复合体的制备及其光响应

物理学报 2003年第5期52卷 1272-1277页

作者：封伟易文辉徐友龙连彦青王晓工吉野胜美清华大学化工系高分子材料研究所北京100084 西安交通大学电子与信息工程学院西安710049 日本大贩大学电子工学吉野研究室

纳米尺寸导电材料对功能分子材料及分子器件的作用越来越显得重要 .采用原位乳液聚合法制备聚苯胺碳纳米管复合体 ,SEM和TEM照片显示复合管的直径为 60— 70nm ,聚苯胺的包裹层厚度约 2 5— 3 0nm .x射线衍射及热分析表明纳米复合管... 详细信息

纳米尺寸导电材料对功能分子材料及分子器件的作用越来越显得重要 .采用原位乳液聚合法制备聚苯胺碳纳米管复合体 ,SEM和TEM照片显示复合管的直径为 60— 70nm ,聚苯胺的包裹层厚度约 2 5— 3 0nm .x射线衍射及热分析表明纳米复合管的结晶性能增强 ,热稳定性得到提高 .光电响应试验表明复合管的光吸收增强 ,光电流增大 ,说明聚苯胺

关键词：聚苯胺-碳纳米管复合体制备光响应原位乳液聚合法纳米尺寸导电材料光诱导电荷分离现象