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Effect of Cooling Rate on Morphology and Oxygen Permeability of Polypropylene

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International Journal of Minerals,Metallurgy and materials 1999年第3期13卷 219-223页

作者： Wei Tian Raymond T. Whodhams(Material Science and engineering School, university of Science and {2. Beijing, Beijing 100083, china)(Department of Chemical engineering and Applied Chemistry university of Toronto, Toronto M5S IA4, Canada) Material Science and engineering School University of Science and Technology Beijing Beijing 100083 China Department of Chemical engineering and Applied Chemistry University of Toronto Toronto Ont. M5S IA4 Canada

The influence of different cooling rates on the morphology and oxygen permeabilityr of polypropylene containing ferrocene has been investigated. The spherulitic crystalline size and structure, which can affect the oxygen permeability are dependent upon the heating temperature, annealing time and cooling rate. The modulus of the composite was measured b}' dynamic mechanical analysis.

关键词： polypropylene oxygen permeability cooling rate

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马来酸单辛酯与苯酐单辛酯的制备

江苏化工 2003年第1期31卷 38-39,47页

作者：胡振锟狄超南京工业大学材料学院高分子系江苏南京210009 江苏省化工研究所江苏南京210024

研究了在无催化剂无溶剂条件下合成马来酸单辛酯和苯酐单辛酯的工艺条件 ,通过控制反应所需的温度和反应时间 ,制备了产率比较高的目标产物 ;

关键词：马来酸单辛酯苯酐单辛酯制备工艺条件反应时间

Surface modification of the BaMgAl10O17:Eu2. phosphor by dual-coating of oxide nano-particles

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Surface modification of the BaMgAl10O17:Eu2+ phosphor by dua...

第七届中国功能材料及其应用学术会议

作者： ZHOU Zhi~(1,2.,ZENG Shao-bo~2.LIU Qing-ling~2.WANG Feng-chao~(1,2., HUANG Ke-long~1,LIU Su-qin~1 (1.college of Chemistry and Chemical engineering,Central South {2.,Changsha 410083,china 2.Hunan Xinduoli New Material Company,Shaoyang 42.000,china)

The surface of BaMgAlO:Eu phosphor,blue-emitting source for fluorescent lamps,plasma display panels and white light emitting diodes,was coated with SiO and *** surface modification of the phosphor was performed by a modified sol-gel method using the colloidal alumina and silica as surface coating *** observed the oxide nano-particles on the surface of the single coated and the dual-coated phosphors and found that coated with nano-particles of oxides leads to less relative brightness decrease in the thermal experiment and dual-coated less than single coated ***、XRD、XPS and EDS were employed to characterize the coated and uncoated phosphor for identify its structure and morphology.

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An Analytical Method Based on Design Structure Matrix for Modular Identification

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An Analytical Method Based on Design Structure Matrix for Mo...

The 7th International Conference on Computer-Aided Industrial Design and Conceptual Design (CAID&CD’2.06)

作者： XU Xiaogang 1 LI Chao 1 YAN Jian 1 CHEN Yahua 2.1 Dept. of Electrical Power engineering college of Chongqing Communication Chongqing P.R..{2. 400035 2.Chongqing technology and Business university Chongqing P.R.{2. 400067

This paper presents an algorithm of modular identification in product architecture design on the base of information dependency. A design structure matrix （DSM） model is constructured to capture the relationship between members, and it can be transformed for searching better product structure. A coordination cost function is defined to evaluate modular quality. If the cost of every module is same, it is impossible to find out better modules, consequently, an auxiliary estimated function is also *** avoids the limitation of coordination cost function and will be capable of accurately selecting available module. A detail of calculation steps are described and a testing case illustrates the effect of the algorithm. The results also show that the optimal modular partition can be obtained. The method may be applied in product design management for clustering components to prompt quality of product, for ordering design parameters and for building a development team to speed up development process.

关键词： Coordination Cost Function Design Structure Matrix Module Modular Identification

Approximate Optimal PD Disturbances Rejection Control of Nonlinear Systems Based on Dynamic Compensation

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Approximate Optimal PD Disturbances Rejection Control of Non...

2.11 Chinese Control and Decision Conference（CCDC）

作者： GAO De-xin 1,2.Wei Rui1 (1.college of Automation and Electronic engineer,Qingdao university of Science & {2.,Qingdao 2.6042.2.School of Internet of Things engineering Jiangnan university WuXi,2.412.)

This paper designs approximate optimal PD disturbances rejection controller of nonlinear systems based on dynamic *** successive approximation theory of differential equations,the original optimal disturbances rejection problem of nonlinear systems is transformed into a sequence of non-homogeneous linear two-point boundary value (TPBV) *** it provides the optimization methods of optimal state variables feedback from the time domain into the frequency domain-based optimal PD controller parameters Then the system optimal dynamic compensation network is obtained,which is used to eliminate the influence of the *** optimal tuning parameters of PD is designed and the algorithm is *** show that the result in this paper have dynamic performance,and it is also verified the validity and superiority of this method.

关键词： Nonlinear Systems Dynamic Compensation Disturbances Rejection PD Controller

MODIFIED LOCAL STABILITY FACTOR

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岩石力学与工程学报 2002年第3期21卷 369-373页

作者： Deng Ronggui1 Okubo S 2.Zhang Zhuoyuan3 (1 Civil engineering college,Southwest Jiaotong {2.,Chengdu 610031 china) (2.Faculty of engineering,The {2. of Tokyo,7-3-1 Hongo,Bunkyo-Ku,Tokyo 113,Japan) (3 college of Environment and Civil Engin Civil engineering college Southwest Jiaotong University Chengdu 610031 Faculty of engineering The University of Tokyo 7-3-1 Hongo Bunkyo-Ku Tokyo 113 日本 college of Environment and Civil engineering Chengdu University of Technology Chengdu 610059

In the past,stability evaluation of engineering rockmass is often based on the distribution of stress and deformation in engineering rockmass. Some scholars have put forward the concept of local stability factor of rockmass and its calculating method. But its condition is too harsh. The concept of is put forward and its formula is deduced based on the rockmass mechanics principle and strength criteria. The modified local stability factor has been used to evaluate the stability of surrounding rockmass of tunnel.

关键词： rock mechanics stability of rockmass local stability factor of engineering rockmass

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碱磷渣加气混凝土体积密度影响因素的研究

武汉理工大学学报 2009年第7期31卷 52-55页

作者：漆贵海林力勋彭小芹王勇重庆大学材料学院重庆400045 贵州中建建筑科研设计院有限公司贵阳550006

研究用工业废渣-磷渣为原料制备制免蒸压加气混凝土,研究中对发气剂掺量、水玻璃模数、碱含量、水固比和碱溶液温度等因素对加气混凝土体积密度的影响进行了讨论。体积密度在B05—B07级的磷渣加气混凝土,2. d抗压强度可以达到3—6 MPa,... 详细信息

研究用工业废渣-磷渣为原料制备制免蒸压加气混凝土,研究中对发气剂掺量、水玻璃模数、碱含量、水固比和碱溶液温度等因素对加气混凝土体积密度的影响进行了讨论。体积密度在B05—B07级的磷渣加气混凝土,2. d抗压强度可以达到3—6 MPa,实验结果表明:碱磷渣免蒸压加气混凝土的体积密度和强度都符合GB 11968—2.06标准的要求。

关键词：碱激发磷渣加气混凝土免蒸压养护

NUMERICAL SIMULATION OF WAVE RESISTANCE OF TRIMARANS BY NONLINEAR WAVE MAKING THEORY WITH SINKING AND TRIM BEING TAKEN INTO ACCOUNT

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Journal of Hydrodynamics 2011年第2期23卷 224-233页

作者： WANG Zhong LU Xiao-ping college of Naval Architecture and Power Naval University of Engineering Wuhan 430033 China

Up to now, there are no satisfactory numerical methods for simulating wave resistance of trimarans, mainly due to the difficulty related with the strong nonlinear features of the piece hull wave making and their interference. This article proposes a numerical method for quick and effective calculation of wave resistance of trimarans to be used in engineering applications. Based on Wyatt＇s work, the nonlinear free surface boundary condition, the time domain concept, and the full nonlinear wave making theory, using the Rankine source Green function, the 3-D surface panel method is expanded to solve the trimaran wave making problems, with high order nonlinear factors being taken into account, such as the influence of the sinking and trim, transom, and ship wave immersed hull surface. And the software is successfully developed to implement the method, which is validated. Several trimaran models, including a practical trimaran with a sonar dome and the transom, are used as numerical calculation samples, their wave making resistance is calculated both by the present method and some other methods such as linear （Dawson） methods. Moreover, sample model resistance tests were carried out to provide data for comparison, validation and analysis. Through the validation by model experiments, it is concluded that present method can well predict the wave making resistance, sinking and trim, and the accuracy of wave making resistance calculation is significantly improved by taking the trim and sinking into account, especially at high speeds.

关键词： trimaran nonlinear wave making resistance surface panel method sinking trim ship model test

Preparation and characterization of the TiO_2.V_2._5 photocatalyst with visible-light activity

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Rare Metals 2006年第6期25卷 636-642页

作者： LIU Jianhua YANG Rong LI Songmei School of materials Science and engineering Beihang University Beijing 100083 China

Visible-light responsive TiO2.V2.5 catalyst was prepared using a binary sol-gel and in-situ intercalation method. The TiO2.sol and V2.5 sol were mixed to disperse the V2.5 species in the TiO2.phase at molecular level. The binary sol was then intercalated into interspaces of polyaniline （PANI） by means of in-situ polymerization of aniline. Conglomeration of the TiO2.V2.5 dusters during the calcination process was avoided because of the wrap of polyaniline. The surface mor- phology, the crystal phases, the structure, and the absorption spectra of （PANI）,/TiO2.V2.5 and the composite catalyst were studied using SEM, XRD, FT-IR, and UV-Vis. The photoactivity of the prepared catalyst under UV and visible light irradiation were evaluated by decolorization of methylene blue （MB） solution. The results showed that the composite catalyst displayed a homogeneous anatase phase, and the vanadium pentoxide species was highly dispersed in the TiO2.phase. The composite catalyst responded to visible light because of the narrowed band gap. In this study, the catalyst with the sol volume ratio of TiO2. V2.5 = 10：1 presented the best photocatalytic activity.

关键词： inorganic non-metal materials visible-light active photocatalyst binary sol-gel synthesis composite catalyst