检索结果-南通市图书馆

A software cascading faults model

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2011年第11期54卷 2454-2458页

作者： LIU YanHeng 1,2,LIU XueLian 3 & WANG Jian 1,2 1 Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education,jilin university,Changchun 130012,China 2 College of Computer Science and Technology,jilin university,Changchun 130012,China 3 College of Software,jilin university,Changchun 130012,China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun China College of Computer Science and Technology Jilin University Changchun China College of Software Jilin University Changchun China

Functions and call relations are extracted into nodes and edges,respectively,by which a novel topological model is *** directional edges and the corresponding weight values express the call relations and tightness *** introducing two concepts of function fault-tolerant capability and software fault intensity and by designing a allocation rule on fault-tolerant capability,a cascading fault model is built to explore fault propagation *** on practical software networks show that a weak fault intensity,a small number of initial faults,and a strong fault-tolerant capability can slow down the spreading *** functions with more call relations and more closer tightness contribute more to the stability of the whole system.

关键词： software fault tolerant cascading faults fault-tolerant capability fault intensity

Preparation and Electrochemical Behaviors of AA-PEGMA Copolymer Film Electrode

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2012年第1期28卷 156-161页

作者： Lü Xue and LIU Feng-qi College of Chemistry, jilin university, Changchun 130012, P. R. China College of Chemistry Jilin University Changchun 130012

A new kind of comblike copolymer film composed of acrylic acid-polyethylene glycol monomethyl ether acrylate copolymer（AA-PEGMA copolymer） was successfully synthesized to immobilize hemoglobin（Hb）. FTIR, UV-Vis and CD spectra suggest that Hb kept its original structure in the AA-PEGMA copolymer film without denaturation. A pair of well-defined, quasi-reversible cyclic voltammetric peaks at around –270 mV vs. saturated calomel electrode（SCE） for the Hb Fe（III）/Fe（II） redox couple was observed on the film-modified electrode in phos phate buffer solution（PBS, pH=7.0）. The formal potential of Hb/AA-PEGMA copolymer film-modified electrode is linearly dependent on solution pH with a slope of –46.3 mV/pH, illustrating that one-proton transfer was accompa nied with each electron transfer. Furthermore, the modified electrode displayed electrocatalytic response to the reduc tion of H2O2 with a linear range of 3.5―126 μmol/L and a detection limit of 1.17 μmol/L. In conclusion, the AA-PEGMA copolymer film was proved to be an excellent matrix for the immobilization and electrochemistry of proteins.

关键词： Copolymer film Hemoglobin Comblike polymer Electrochemical behavior

Au-chin Tang——A prestigious scientist,outstanding educator and distinguished leader

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2008年第12期51卷 1142-1145页

作者： Institute of Theoretical Chemistry, jilin university, Changchun 130023 Prof. Zhang Hongxing Institute of Theoretical Chemistry Jilin University

Au-chin Tang (1915-2008), member of the Chinese Academy of Sciences (CAS), was born in Yixing, Jiangsu Province on November 18th, 1915. During his lifetime, he held various positions such as president

关键词： Au-chin Tang A prestigious scientist,outstanding educator and distinguished leader

Synthesis and Characterization of Liquid Crystal with Lower Temperature of Phase Change of meso-tetra-(4-n-lauroyloxyphenyl)porphyrin

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1999年第9期10卷 783-786页

作者： Wei LIU Tong Shun SHI(1 Department of chemistry, The Forth Military Medical university, Xian 7100322 Department of chemistry, jilin university. Changchun 130023) Department of Chemistry Forth Military Medical University Xian 710032 China Department of Chemistry Juin University Changchun 130023 China

The synthesis and characterization of meso-tetra (4-n-lauroyloxy phenyl) porphyrin with long ester chains are reported. The domains of stability and the structure of the liquid crystalline phases are determined by opt... 详细信息

关键词： porphyrin liquid crystal lower temperature of phase change

FLUORESCENCE　STUDIES　ON　SELF－ASSEMBLING　BEHAVIOR　OF　AMPHIPHILES　WITH　NAPHALENE－1，5－DIOXY　GROUP

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1996年第8期7卷 735-736页

作者： Guo Wen LI Ying Qiu LIANG2(Institute of Theoretical Chemistry, jilin university, Changchun, 130023)(Department of Chemistry, Nanjing university, Nanjing 210093) Institute of Theoretical Chemistry Jilin University Changchun 130023 Department of Chemistry Nanjing University Nanjing 210093

Fluorescene Spectra in dilute aqueous solution of a series of single chain amphiphileswith an interposed naphthalene-1,5-dioxy group were studied to elucidate the characteristic selfassembling behavior. which indicate... 详细信息

关键词： STABLE BILAYER ASSEMBLIES SINGLE-CHAIN AMPHIPHILES DILUTE AQUEOUS-SOLUTION

Effects of Alloying Elements on Microstructure and Erosion Resistance of Fe-C-Cr Weld Surfacing Layer

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2003年第4期19卷 351-354页

作者： Daqian SUN, Wenquan WANG, Zhaozhi XUAN, Yue XU and Zhenfeng ZHOUSchool of Materials Science and Engineering, jilin university, Changchun 130025, China Sch. of Mat. Sci. and Eng. Jilin Univ. Changchun 130025 China

Effects of alloying elements on microstructure and erosion resistance of Fe-C-Cr weld surfacing layer have been studied. The experimental results show that increasing C and Cr content favors improving the erosion resistance of the layer, and the excessive C and Cr result in decreasing the erosion resistance at 90 deg. erosion. That Mo, Nb or Ti improves the erosion resistance of Fe-C-Cr weld surfacing layer is mainly attributed to increasing the amount of M7C3 and forming fine NbC or TiC in austenite matrix, but the excessive Mo, Nb or Ti is unfavorable. The addition of Mo, Nb and Ti in proper combination possesses stronger effect on improving the erosion resistance and the erosion resistance (εA) of Fe-C-Cr weld surfacing layer with fine NbC, TiC and M7C3 distributing uniformly in austenite matrix obviously increases to 2.81 at 15 deg. erosion and 2.88 at 90 deg. erosion when the layer composition is 3.05C, 20.58Cr, 1.88Mo, 2.00Nb and 1.05Ti (in wt pct).

关键词： Weld surfacing layer Alloying elements Erosion resistance

Superhard nano-multilayers and nanocomposite coatings

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2005年第2期15卷 2-12页

作者： BAI Xiaoming, ZHENG Weitao* and AN Tao(Department of Material Science and Key Laboratory of Automobile of MOE, jilin university, Changchun 130012, China) Lab. of Automobile of MOE Dept. of Mat. Sci. Jilin Univ. Changchun 130012 China

This paper reviews the recent development of nano-multilayers and nanocomposite coatings. The hardening mechanisms and design of hard coating are discussed in details. Recent research on Ti/TiN and nitride/nitride multilayer, Ti-Si-N and Ti-Al-Si-N nanocomposite coatings is described, and the perspectives of the related research are proposed.

关键词： nano-structured materials multilayer nanocomposite hardness

Framework Structure of a Synthetic High Silica Zeolite --ZSM-39 from a C_2H_4(OH)_2-H_2O Mixed Solvent System

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1989年第2期5卷 187-189页

作者： Yang Guangdi (Institute of Theoretical Chemistry, jilin university, ChangchunFeng Shouhua and Xu Ruren (Department, of Chemistry, jilin university, Changchun)

The structural analogy of clathrate synthesized with natural zeolite framework is well known. HPF;·6H;O and （CH;）;（OH）·5H;O are isostructural with sodalite,melanophlogite is isostructural with the 12 cubic gas hydrate and zeolite ZSM-39 with the 17 gas hydrate. The synthesis of ZSM-39 was first reported by Brace in *** and Meier also obtained the crystals of ZSM-39 with size<10μm and analyzed its crystal stucture by the powder X-ray *** 1984,Gies solved the crystal structure of dodecasil 3C（ZSM-39） synthesized from an aqueous system in space group F;.In the present paper,we report the framework structure of the high silica zeolite—ZSM-39 obtained from the ethylene glycol-water mixed solvent system.

关键词： ZSM-39 X-ray Structure

The Synthesis of Single Crystals of Manganese Aluminophosphate Molecular Sieve and Studies on Their Properties

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1989年第1期5卷 1-7页

作者： Han Shuyun and Zhou Jianrong(Department of Chemistry, jilin university, Changchun)

Single crystals of the molecular sieve, MnAPO-5, were synthesized by hydrothermal synthesis in the presence of fluoride ions. It was shown by X-ray diffraction, infrared spectroscopy, electron paramagnetic resonance spectroscopy, electron probe analysis and chemical composition analysis that the structure of MnAPO-5 is of the A1PO-5 type, and manganese(Ⅱ) is incorporated into the framework. Adsorption properties, thermal stability and surface acidity were also investigated.

关键词： Single crystal Synthesis Molecular sieve