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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

Recombinant scFv Antibodies against E Protein and N Protein of Severe Acute Respiratory Syndrome Virus

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Acta Biochimica et Biophysica Sinica 2004年第8期36卷 541-547页

作者： Hui LIU , Yan-Li DING, Wei HAN, Mei-Yun LIU, Rui-Yang TIAN, Sheng-Li YANG, and Yi GONGshanghai Research Center of Biotechnology, shanghai Institutes of Biological Sciences, Chinese Academy of Sciences,graduate school of the Chinese Academy of Sciences, shanghai 20023., china shanghai Research Center of Biotechnology Shanghai Institutes of Biological Sciences Chinese Academy of Sciences Graduate School of the Chinese Academy of Sciences Shanghai 200233 China. huiliu@***

Three single chain antibodies (scFv) against the proteins of severe acute respiratory syndrome coronavirus (SARS-CoV) were isolated by phage display from an scFv antibody library. Bio-panning was carried out against immobilized purified envelope (E) and nucleocapsid (N) proteins of SARS-CoV. Their binding activity and specificity to E or N protein of SARS-CoV were characterized by phage-ELISA. Two of them, B10 and C20, could recognize non-overlapping epitopes of the E protein according to the two-site binding test result. Clone A17 could recognize N protein. The sequence of the epitope or overlapping epitope of scFv antibody A17 was PTDSTDNNQNGGRNGARPKQRRPQ. The affinity (equilibrium dissociation constant, Kd) of SARS-CoV E protein was 5.7×10–8 M for B10 and 8.9×10–8 M for C20. The affinity of A17 for N protein was 2.1×10–6 M. All three scFv antibodies were purified with affinity chromatography and determined by Western blot.

关键词： SARS-CoV antibody scFv phage display affinity chromatography

CO observations of massive star forming regions at different evolutionary phases

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Science china(Physics,Mechanics & Astronomy) 2006年第5期49卷 626-640页

作者： CHEN Xi1,2, XU Ye1,3, SHEN Zhiqiang1,3 & LI Jingjing1,2 1. shanghai Astronomical Observatory, Chinese Academy of Sciences, shanghai 200030, china 2. graduate school of the Chinese Academy of Sciences, Beijing 100034, china 3. Joint Institute for Galaxy and Cosmology, shanghai Astronomical Observatory and the University of Science and Technology of china, shanghai 200030, china shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China graduate school of the Chinese Academy of Sciences Beijing 100034 China Joint Institute for Galaxy Cosmology Shanghai Astronomical Observatory the University of Science Technology of china Shanghai 200030 China

The 12CO (J=1-0), 13CO (J=1-0) and C18O (J=1-0) emissions in 9 massive star forming regions, which are believed to be at different stages of massive star formation, were mapped with the 13.7 m millimeter wave telescope at Qinghai Station of Purple Mountain Observatory. Of the observed 9 sources, 13CO cores were detected in seven of them, and C18O cores in five of them. And only two sources associated with C18O cores and H2O masers showed the extended structures and strong outflows. This is the first detection of outflow associated with IRAS 22566+5828 in the observing field of S152/S153. The physical parameters of cores and outflows for these sources, derived from Local Thermal Equilibrium (LTE) analysis, are presented. These observing results suggest that the C18O cores will only appear when the gas density is high enough and the probability to have an outflow is very high when the clumps show the C18O and H2O maser simulta- neously.

关键词： star formation cloud core outflow H2O maser

Local Existence of Smooth Solutions to the FENE Dumbbell Model

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Chinese Annals of Mathematics,Series B 2012年第4期33卷 501-520页

作者： Ge YANG11school of Mathematical Sciences, Fudan University, shanghai 200433, china. school of Mathematical Sciences Fudan University Shanghai 200433 China

The author proves the local existence of smooth solutions to the finite extensible nonlinear elasticity (FENE) dumbbell model of polymeric flows in some weighted spaces if the non-dimensional parameter b > 2.

关键词： Fokker-Planck equation FENE model Degenerate parabolic equations Regularity

Method of sequential mesh on Koopman-Darmois distributions

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Science china Mathematics 2010年第4期53卷 917-926页

作者： LI Yan & PU XiaoLong school of Finance and Statistics,East china Normal University,shanghai 200241,china 1. school of Finance and Statistics East China Normal University Shanghai 200241 China

For costly and/or destructive tests,the sequential method with a proper maximum sample size is *** on Koopman-Darmois distributions,this paper proposes the method of sequential mesh,which has an acceptable maximum sample *** comparison with the popular truncated sequential probability ratio test,our method has the advantage of a smaller maximum sample size and is especially applicable for costly and/or destructive tests.

关键词： method of sequential mesh sequential probability ratio test (SPRT) Koopman-Darmois distributions maximum sample size

A FILTER SECANT METHOD WITH NONMONOTONE LINE SEARCH FOR EQUALITY CONSTRAINED OPTIMIZATION

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Journal of Systems Science & Complexity 2010年第4期23卷 846-860页

作者： Chao GU Detong ZHU school of Mathematics and Informatics Shanghai LiXin University of Commerce Shanghai 201620 China Business College Shanghai Normal University Shanghai 200234 China

This paper proposes a filter secant method with nonmonotone line search for non-linearequality constrained *** Hessian of the Lagrangian is approximated using the BFGSsecant *** new method has more flexibility for the acceptance of the trial step and requires lesscomputational costs compared with the monotone *** global and local convergence of the proposedmethod are given under some reasonable ***,two-step Q-superlinear convergence rateis established by introducing second order correction *** numerical experiments are reported toshow the effectiveness of the proposed algorithm.

关键词： Convergence filter method line search nonmonotone secant update

ON SPECTRUM OF NETWORKS BASED ON MATRIX OF LINK-STATE AND ITS SYMMETRY

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Journal of Systems Science & Complexity 2009年第2期22卷 243-251页

作者： Liuqing XIAO Shipeng ZHOU Department of Mathematics Shanghai Jiao Tong University Shanghai 200030 China. school of Business University of Shanghai for Science and Technology Shanghai 200093 China.

This paper constructs a new spectrum of networks by means of the matrix of link-state ofthe network,which can reveal the characteristics of the correlation between the degrees of the ***,the computation of this spectrum of networks is usually more feasible and more efficient due tothe much lower order of its matrix of link-state than its adjacent matrix in *** estimatesfor the bounds of the key eigenvalues in the spectrum are obtained,the corresponding inequalities arepresented and *** the sake of its application,the authors define spectrum of networks in twoways,and all theorems are given in parallel for both kinds of *** addition,the authors finda symmetry in the spectrum,which is relative to the characteristic of structure of its network to someextent.

关键词： Complex network Laplacian matrix matrix of link-state spectrum of networks symmetry

Experts' Knowledge Fusion in Model-Based Diagnosis Based on Bayes Networks

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Journal of Systems Engineering and Electronics 2003年第2期14卷 25-30页

作者： Deng Yong & Shi Wenkang school of Electronics & Information Technology, shanghai Jiaotong University, shanghai 200030, P. R. china school of Electronics & Information Technology Shanghai Jiaotong University Shanghai 200030 P. R. China

In previous researches on a model-based diagnostic system, the components are assumed mutually independent. Howerver , the assumption is not always the case because the information about whether a component is faulty or not usually influences our knowledge about other components. Some experts may draw such a conclusion that 'if component m 1 is faulty, then component m 2 may be faulty too'. How can we use this experts' knowledge to aid the diagnosis? Based on Kohlas's probabilistic assumption-based reasoning method, we use Bayes networks to solve this problem. We calculate the posterior fault probability of the components in the observation state. The result is reasonable and reflects the effectiveness of the experts' knowledge.

关键词： Model-based diagnosis Experts' knowledge Probabilistic assumption-based reasoning Bayes networks.

Organic Solvents Mediate Self-assembly of GAV-9 Peptide on Mica Surface

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Acta Biochimica et Biophysica Sinica 2007年第4期39卷 285-289页

作者： Hai LI~(1,3) Feng ZHANG~1 Yi ZHANG~1* Jianhua HE~1 Jun HU~(1,2) 1 shanghai Institute of Applied Physics,Chinese Academy of Sciences,shanghai 201800,china 2 Bio-X Life Sciences Research Center.College of Life Science and Biotechnology,shanghai Jiaotong University,shanghai 200030,china 3 graduate school of the Chinese Academy of Sciences,Beijing 100049,china shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800 China graduate school of the Chinese Academy of SciencesBeijing 100049 China Bio-X Life Sciences Research Center College of Life Science and Biotechnology Shanghai Jiaotong UniversityShanghai 200030 China

Self-assembly of peptides into fibrils and other morphologies has attracted much attention inmany fields,especially in nanofabrication,pathology and *** this paper,self-assembly of GAV-9peptide in organic solvents,ethanol and acetone,was investigated using atomic force microscopy(AFM)and attenuated total reflectance-Fourier transform infrared spectroscopy(ATR-FTIR).The results indicatedthat GAV-9 self-assembled into various nanostructures in both solvents after deposited and evaporated *** with β-sheet conformation were observed in both solvents when the peptide concentrationwas higher than 280 μ***,ordered fibrils with β-sheet conformation were formed in ethanol,butnot in acetone,with a peptide concentration ranging from 7 μM to 28 μ*** attribute the formation ofvarious nanostructures to the different physicochemical properties of the polar organic solvents on the self-assembly of GAV-9 peptide.

关键词： self-assembly GAV-9 peptide organic solvents ATR-FTIR AFM