检索结果-南通市图书馆

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数据挖掘技术在图书馆读者分析中的应用

图书情报工作 2009年第12期53卷 121-124页

作者：钱强李英华东理工大学商学院上海200237

使用SOM聚类方法对上海某大学图书馆数据库中的借阅数据进行挖掘分析,对读者进行聚类,用关联规则挖掘方法对某类读者的计算机类图书借阅记录进行挖掘,分析对每一类读者的借阅特征,以找出其借书规则,从而为图书馆管理提出建议。

关键词：数据挖掘聚类关联规则自组织映射网络

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A Novel Synthesis of Fluoroalkylated Bicyclo-δ-lactones from Polyfluoroalkyl Iodides and Diallylacetic Acids

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A Novel Synthesis of Fluoroalkylated Bicyclo-δ-lactones fro...

中国化学会第四届有机化学学术会议

作者： WU, Fan-Hong XIAO, Fan-Hua ZOU, Xiao-Wei SHEN, Yong-Jia PAN,Tie-Ying (College of chemistry and pharmaceutics, {2. china university of science and technology, shanghai 2.02.7)

＜正＞Lactones occur in many bioactive compounds. Considering the special properties of fluorine-containing compounds, the synthesis of fluorine-containing lactones seems to be very promising. Recently, we reported that the fluoroalkylation-lactonization of 4-pentenoic acid with RFI promoted by sodium dithionite afforded fluoroalkyl-γ-lactones in good *** the ongoing studies into the synthetic methodology of fluorine-containing lactones, herein we wish to report the synthesis of the fluoroalkylated bicyclo-δ-lactones from the reaction of RFI with dial-lylacetic acid initiated by sodium dithionite under mild conditions.

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Synthesis and Optical Properties of Co3O4 Nanocrystals

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Synthesis and Optical Properties of Co3O4 Nanocrystals

第三届全国化学工程与生物化工年会

作者： Shufen Wang, Chunzhong Li Key Laboratory for Ultrafine Materials of Ministry of Education, school of Materials science and Engineering, {2. china university of science & technology, shanghai 2.02.7, china

＜正＞Cobalt oxide （Co3O4） has been widely used as a catalyst, sensor, pigment, magnet, and in electrochromic devices. When falling in the nanosized regime, Co3O4 is expected to exhibit quantum tunneling of magnetization. The Co3O4 nanoparticle system has also been used in the study of macroscopic magnetic quantum effects and for the production of a mesoporous metal oxide framework structure by nanocasting means employing vinyl-functionalized silica as a template. It is now commonly understood that the behaviors of nanophase materials strongly depend on the shapes and sizes of the particles, which are thus a key factor to their ultimate performance and applications. Therefore, it is vitally important to study the fundamentals of nanocrystalline Co3O4 formation with various synthetic routes because the understanding of this aspect will guide us to newer materials design and more sophisticated synthetic methods.

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Anion coordination complex [ClPt（bpt）4]Cl (bpt= N,N'-bis（3-pyridylmethyl）-2.thiourea)

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science china {2. 2009年第4期 471-474页

作者： LI Xin1,LI Hui2.YU ShuYan1,4 & LI YiZhi3 1 Laboratory for Self-Assembly chemistry,Department of chemistry,Renmin {2. of china,Beijing 100872.china 2.school of Materials science and Engineering,east china {2. of science and technology,{12. 2.02.7,china 3 State Key Laboratory of Coordination chemistry,Coordination chemistry Institute,Nanjing {2.,Nanjing 2.0093,china 4 State Key Laboratory of Structural chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of sciences,Fuzhou 350002.china

The anion coordination complex,[ClPt(bpt)4]Cl (bpt=N,N'-bis(3-pyridylmethyl)-2.thiourea),was synthesized and studied by X-ray crystal structure analysis,NMR and FAB mass spectra. In the solid state,the Pt(bpt)4 anion receptor adopts a cone conformation to bind the chloride anion through hydrogen bonds and electrostatic interaction in which the four branches of the thiourea ligands bind the chloride anion to form N-H…Cl-hydrogen bonds (3.49-3.81). The entraped chloride anion is situated above the Pt(Ⅱ) center at 3.52.. Further second-sphere coordination assemby from the Pt(bpt)4 core with 8 zinc(Ⅱ) tetraphenylporphyrins (ZnPr) is discussed.

关键词： anion coordination platinum(Ⅱ) complex supramolecular chemistry hydrogen bonds second-sphere coordination

Actuator Fault Reconstruction in a Class of Uncertain Dynamic Systems with Mismatched Uncertainties

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Actuator Fault Reconstruction in a Class of Uncertain Dynami...

2.10 Chinese Control and Decision Conference

作者： Zhongyu Shen~1,Jin Zhao~1,Xingsheng Gu~2.1.school of Electrical & Automation Engineering,Nanjing Normal university,Nanjing,2.0042.{2. 2.school of Information science & Engineering,east china university of science & technology,shanghai,2.02.7,{2.

＜正＞This paper considers the sliding mode observer based actuator fault reconstruction schemes for a class of uncertain dynamic system with mismatched *** deal with a broader class of mismatched uncertainties,we propose the novel sliding mode observer,which LMI existence conditions and some verification are given by combined with LMI methods and are primarily designed for actuator fault *** proposed design need not predigest the canonical process of the dynamic systems which the sliding mode observer designs are ***,applying the equivalence output error concept and the proposed observer,the fault information is obtained so that actuator faults are reconstructed by the designed sliding mode *** numerical simulation results are presented to validate the approach.

关键词： sliding mode observer mismatched uncertainties actuator fault reconstruction LMI

Nonlinear optic polymer film based on cellulose derivativer

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合成橡胶工业 2005年第5期 389-389页

作者： Zhou Limin,Wang Dening (school of Materials science and Engineering,{2. china university of science and technology, shanghai 2.02.7, china)

纤维素衍生物基非线性光学聚合物膜周立民,王得宁(华东理工大学材料科学与工程学院,上海2.02.7)以二乙酸纤维素为基础聚合物,三羟甲基三聚氰胺(TMM)或六羟甲基三聚氰胺(HMM)为交联剂,制得含正离子生色团的二阶非线性光学聚合物。结果表... 详细信息

纤维素衍生物基非线性光学聚合物膜周立民,王得宁(华东理工大学材料科学与工程学院,上海2.02.7)以二乙酸纤维素为基础聚合物,三羟甲基三聚氰胺(TMM)或六羟甲基三聚氰胺(HMM)为交联剂,制得含正离子生色团的二阶非线性光学聚合物。结果表明,以HMM为交联剂制得的非线性光学聚合物的驰豫行为强于采用TMM者,这与小分子物质的存在及HMM的自缩合能力较强有关。

关键词：二乙酸纤维素三羟甲基三聚氰胺六羟甲基三聚氰胺非线性光学聚合物正离子生色团

低密度聚乙烯熔体挤出胀大的实验和数值模拟预测

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上海交通大学学报 2003年第4期37卷 535-540页

作者：黄树新江体乾鲁传敬黄进上海交通大学工程力学系上海200030 华东理工大学化工学院上海200237

对一种国产低密度聚乙烯 ( LDPE)进行了经过长毛细管的挤出胀大流动实验测量 ,得到了挤出胀大比和流动曲线 .测定了材料的线性和非线性粘弹性 ,并用 PSM模型进行了表征 ,同时数值模拟了 LDPE熔体的挤出胀大流动 .预测结果与实验基本吻... 详细信息

对一种国产低密度聚乙烯 ( LDPE)进行了经过长毛细管的挤出胀大流动实验测量 ,得到了挤出胀大比和流动曲线 .测定了材料的线性和非线性粘弹性 ,并用 PSM模型进行了表征 ,同时数值模拟了 LDPE熔体的挤出胀大流动 .预测结果与实验基本吻合 ,但在较高剪切速率下两者间还存在一定的偏差。

关键词：低密度聚乙烯挤出胀大实验流变性测量实验 PSM模型数值模拟

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基于扫描数据建立人体动态模型

上海交通大学学报 2004年第Z1期38卷 148-153页

作者：马永有张辉金先龙华东理工大学机械工程学院上海200237 上海交通大学机械与动力工程学院上海200030

提出一种由三维人体扫描数据建立人体动态模型的新方法.该模型由骨架运动学模型和简化的三角网格表面模型构成,分别用于产生人体各种姿态以及表达相应的体表形状.通过操纵骨架运动,可实现实时与逼真的人体姿态仿真.实例分析表明,该方法... 详细信息

提出一种由三维人体扫描数据建立人体动态模型的新方法.该模型由骨架运动学模型和简化的三角网格表面模型构成,分别用于产生人体各种姿态以及表达相应的体表形状.通过操纵骨架运动,可实现实时与逼真的人体姿态仿真.实例分析表明,该方法克服了目前从扫描数据通常仅用于构造静态人体模型或无法实现实时姿态仿真的缺陷,在人机工程设计及虚拟现实领域有较大应用价值.

关键词：人体模型特征提取映射变换动态造型

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SYNTHESIS AND CHARACTERIZED OF METHYL-DI-PHENYLETHYNYLENESILANE AND ITS NETWORK POLYMER

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SYNTHESIS AND CHARACTERIZED OF METHYL-DI-PHENYLETHYNYLENESIL...

Third east Asian Polymer Conference

作者： Chen Qi, Ni Li-Zhong, Hu Chun-Pu school of Materials science and Engineering, {2. china university of science and technology, shanghai 2.02.7, P.R.china

It is well-known that some silicon-containing polymers composed of Si-H and C≡C groups, such as poly[(phenyl-silylene)ethynylene-1,3-phenyleneethynylene][-Si(Ph)H-C≡C-C6H4-C≡C-], poly[(phenylsilylene) -diethynylene] [-Si(Ph)H-C≡C-C≡C-] andpoly[(methylsilylene)-diethynylene] [-Si(CH3)H-C≡C-], exhibit high thermal stability, which are much better than organic polymers and similar to ceramics and have been paid more attention, since they could be potentially applied in the aerospace technology. In this article a new kind of silicon-containing monomer, i.e. methyl-di- phenylethynylenesilane and its network polymer were synthesized and characterized. Furthermore, the heat resistance performance for such a network polymer was examined and studied.

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