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Application of Petri Net to Fault Diagnosis in Satellite

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Journal of Systems Engineering and Electronics 2001年第2期12卷 92-96页

作者： Ding Caihong School of Mechanics, donghua university, Shanghai 200051, P R. China School of Mechanics DongHua University Shanghai 200051 P. R. China

A prototype of fault diagnosis based on Petri net, which is developed for a satellite tele-control subsystem, is introduced in this paper. Its structure is first given with the emphasis on a Petri net modeling tool which is designed using the object oriented method. The prototype is connected to the database with DAO (Date Access Object) technique, and makes the Petri net's firing mechanism and its analyzing methods to be packed up as DLL (Dynamic Link Library) documents. Compared with the rule-based expert system method, the Petri net-based one can store the knowledge in mathematical matrix and make inference more quickly and effectively.

关键词： Database systems Expert systems Matrix algebra Object oriented programming Petri nets Software prototyping

Past, present and future of textile dyeing

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印染 2005年第9期 22-25页

作者： SONG Xin-yuan, donghua university, Shanghai 200051, China

A brief review of textile dyeing was made with focuses on the achievements, developing trend, especially on eco-dyeing, dyeing of new fibers and multicomponent fabrics and some new dyeing techniques were introduced in combination with the research results of the author. A forecast on the dyeing in the future assumed that, apart from developing eco-dyeing, new fibers and new materials will emerge faster, non-water and water saving dyeing methods will become ripe, information network more popular and dyeing highly automatic. The researcher also assumed that bionic coloring, including the multifunctional dyeing, color formation from coloring matter and structure, will greatly improve the dyeing result and the level of textile dyeing.

关键词： dyeing textile history development

外文电子资源的评价分析——东华大学图书馆案例研究

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图书馆杂志 2009年第12期28卷 29-32页

作者：毛莉陈惠兰东华大学图书馆上海201620

以东华大学图书馆为例,通过数据库自身价值评价、使用绩效评价及参考文献分析,对馆藏外文电子资源进行综合评估,旨在揭示科研人员利用文献资料的具体情况和对文献需求的特征,为图书馆确定和优化馆藏结构提供参考。

关键词：电子资源使用统计使用成本引文分析

Dynamic modeling of cellular response to DNA damage based on p53 stress response networks

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Progress in Natural Science:Materials International 2009年第10期19卷 1349-1356页

作者： Jinpeng Qi,Yongsheng Ding,Shihuang Shao College of Information Sciences and Technology,donghua university,Shanghai 201620,China College of Information Sciences and Technology Donghua University Shanghai 201620 China.

Under acute perturbations from the outside,cells can trigger self-defensive mechanisms to fight against genome *** investigate the cellular response to continuous ion radiation(IR),a dynamic model for p53 stress response networks at the cellular level is *** model can successfully be used to simulate the dynamic processes of double-strand breaks(DSBs) generation and their repair,switch-like ataxia telangiectasia mutated(ATM) activation,oscillations occurring in the p53-MDM2 feedback loop,as well as toxins elimination triggered by p53 stress response ***,the model can predict the plausible outcomes of cellular response under different IR dose regimes.

关键词： p53 DNA damage IR Cellular networks Modelin

Effect of electrolytes on electrochemical properties of graphene sheet covered with polypyrrole thin layer

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Progress in Natural Science:Materials International 2011年第6期21卷 460-466页

作者： Ya-meng CAI~(1,2),Zong-yi QIN~1,Long CHEN~2 1.State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, donghua university,Shanghai 201620,China 2.College of Material Science and Engineering,donghua university,Shanghai 201620,China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai 201620 China College of Material Science and Engineering Donghua University Shanghai 201620 China

Graphene sheet(GS) was successfully covered with a polypyrrole(PPy) thin layer through in situ chemical oxidative polymerization of pyrrole monomers in aqueous solution by using GS as a support material and ferric trichloride as an *** resulting nanocomposite was studied by field emission scanning electron microscopy(FE-SEM),Fourier transform infrared spectroscopy(FT-IR) and electrical measurements,including cyclic voltammetry(CV),galvanostatic charge/discharge experiment (GCD),and impedance spectroscopy(EIS).It has been found that the nanocomposite exhibited a typically curved and layer-like structure,and conformational change of PPy chains occurred due to the n-n stacking interaction between the graphitic structures in GS and aromatic rings of the PPy *** attention was paid to the effect of electrolytes on electrochemical properties of the nanocomposites,as expected,electrochemical performance was dependent on the nature of the electrolyte,and the neutral electrolytes containing alkali metal ions were found to be very suitable for GS/PPy *** with the pure PPy,the nanocomposite possessed larger specific capacitance and lower internal impedance,indicating that the nanocomposite can be a promising candidate as electrode material for supercapacitors.

关键词： nanocomposites graphene polypyrrole electrochemical property electrolyte

Cellulose nanocrystals as green fillers to improve crystallization and hydrophilic property of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)

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Progress in Natural Science:Materials International 2011年第6期21卷 478-484页

作者： Hou-yong YU~(1,2),Zong-yi QIN~1,Zhe ZHOU~2 1.State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, donghua university,Shanghai 201620,China 2.College of Material Science and Engineering,donghua university,Shanghai 201620,China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai 201620 China College of Material Science and Engineering Donghua University Shanghai 201620 China

The green nanocomposites of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(PHBV) with various cellulose nanocrystals (CNCs) contents were prepared by solution casting *** effects of CNCs on the crystallization behavior,spherulitic morphology,crystal structure and hydrophilic property of PHBV were studied by differential scanning calorimeter(DSC),polarized optical microscope(POM),wide-angle X-ray diffraction(WAXD) and static water contact angle *** is found that the CNCs act as an effective nucleation agent for crystallization of PHBV,inducing an increase in the melt crystallization temperature of the nanocomposites.A study of the non-isothermal crystallization kinetics further illustrated that overall crystallization rate of PHBV in the nanocomposites was faster than that of neat PHBV,but exhibited a decrease in the crystallinity and the spherulite size of PHBV. Furthermore,the contact angle decreased from 60.1°for neat PHBV to 32.5°for the nanocomposites with 10%CNCs(mass fraction).

关键词： nanocomposites poly(3-hydroxybutyrate-co-3-hydroxyvalerate) cellulose nanocrystals crystallization behavior hydrophilic property

Property A and Uniform Embeddability of Metric Spaces Under Decompositions of Finite Depth

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Chinese Annals of Mathematics,Series B 2010年第1期31卷 21-34页

作者： Yujuan DUAN Qin WANG Xianjin WANG Department of Applied Mathematics Donghua University Shanghai 201620 China Corresponding author. Department of Applied Mathematics Donghua University Shanghai 201620 China

Property A and uniform embeddability are notions of metric geometry which imply the coarse Baum-Connes conjecture and the Novikov *** this paper,the authors prove the permanence properties of property A and uniform em... 详细信息

关键词： Metric space Uniform embedding Property A Large scale decomposition Permanence property

Robust H_∞ Control for Uncertain Markovian Jump Linear Time-Delay Systems

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Journal of Systems Engineering and Electronics 2002年第1期13卷 13-20页

作者： Zhong Maiying, Zhu Kunping & Tang Bingyong Business and Management School of donghua university, Shanghai 200051, P. R. China Business and Management School of donghua university Shanghai 200051 P. R. China

This paper studies the robust stochastic stabilization and robust H∞ control for linear time-delay systems with both Markovian jump parameters and unknown norm-bounded parameter uncertainties. This problem can be solved on the basis of stochastic Lyapunov approach and linear matrix inequality (LMI) technique. Sufficient conditions for the existence of stochastic stabilization and robust H∞ state feedback controller are presented in terms of a set of solutions of coupled LMIs. Finally, a numerical example is included to demonstrate the practicability of the proposed methods.

关键词： Feedback control Linear algebra Linear equations Linear systems Lyapunov methods Markov processes Robustness (control systems)

Remarks on the Operator Norm Localization Property

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Chinese Annals of Mathematics,Series B 2011年第4期32卷 593-604页

作者： Xianjin WANG Department of Applied Mathematics Donghua University Shanghai 201620 China.

The author studies the metric spaces with operator norm localization property. It is proved that the operator norm localization property is coarsely invariant and is preserved under certain infinite union. In the case... 详细信息

关键词： Metric space Asymptotic dimension Operator norm localization Coarse invariance Roe algebra