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A software cascading faults model

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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 1. Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun 130012 China2. College of Computer Science and Technology Jilin University Changchun 130012 China3. College of Software Jilin University Changchun 130012 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

Choice of Parameters in Morse Potential for Copper

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Journal of Materials Science & Technology 1996年第6期12卷 473-475页

作者： Yuming WANG (Dept. of Materials Science, jilin University changchun 130023, china) Dept. of Materials Science Juin University Changchun 130023 China

The choice of parameters in Morse potential for copper was made by the molecular dynamics modeling. The elastic coefficients C-11, C-44, their temperature coefficients T-C11, T-C44, well as the hydrostatic compression behaviour, i.e. pressure/volume curves have been calculated. The choice of Morse potential parameters can be made by comparing the results with the experimental data. The chosen parameters are greatly different for different simulated properties.

关键词： Copper

A Genetic Model for Ore Magma of the Chibaisong Copper-Nickel Sulphide Deposit, jilin

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Acta Geologica Sinica(English Edition) 1994年第4期68卷 401-416页

作者： Fu Debinjilin Institute of Geological Sciences, changchun, jilin Fei Zhenbi jilin Institute of Geological Sciences Changchun Jilin

In the early 1980's, the author proposed his view that copper-nickel sulphide deposts are of ore magma origin. For more than ten years, this view has aroused attention of his colleagues at home and abroad. In this paper an attempt is made to deal with the genetic model for ore magma of copper-nickel sulphide deposits in more details on the basis of geological, geochemical, petrophysico - chemical and thermodynamic studies of the Chibaisong copper-nickel sulphide deposit in the Changbai Mountains, jilin province.

关键词： Chibaisong Changbai Mountains copper-nickel deposit genetic model of ore magma

VARIATION OF PH IN ATMOSPHERIC PRECIPITATION IN CITIES OF jilin PROVINCE

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Chinese Geographical Science 2000年第2期10卷 182-187页

作者： ZHAI Jin-liang DENG Wei YAN Bai-xing SONG Xin-shan NIE Ying-zi(changchun Institute of Geography, the Chinese Academy of Science, changchun 130021, P.R.china)(jilin Petro-chemical Academy changchun 130051, P.R.china ) changchun Institute of Geography the Chinese Academy of Sciences Changchun P. R. China jilin Petro-chemical Academy Changchun P. R. China

Through statistical analysis on data of atmospheric precipitation samples of 8 cities from 1992 to 1997,this paper discussed temporal and spatial variations of pH in atmospheric precipitation in jilin Province, china Monitored pH value in the 8 representative cities was converted into hydrogen ion consistency and average condsistency was calculated by weighting precipitation, then mean pH value was calculated according to average hydrogen ion consisteney. Results show that atmospheric precipitaion of cities in jilin Province is basically. neutral, but in Tumem and Hunchun cities atmospheric precipitation is seriously acid. The average pH value of atmospheric precipitation of the eastern cities of Tumen and Hunchun in many years is 5. 12 and 5. 38 respectively, and the atmospheric precipiboon acidity in the two cities is quite serious with the extreme low pH is 3. 91 and 4. 28 respectively. Most of the acid precipitation occurred in summer and autumn seasons in the 8 monitored cities, so that the low pH value of atmoopheric pmeipitation occurred in summer and autunm seasons and high pH value occurred in winter ed spring seasons. The temporal and spatial variations of pH in atmospheric precipitation in jilin Province are attributed to both local sources and peripheral sources, and are related to both natural and artificial factors.

关键词： atmospheric precipitation pH acid rain jilin Province

COMPARISON　THEOREMS　TO　BOUNDARY　VALUE　PROBLEMS　FOR　ORDINARY　DIFFERENTIAL　EQUATIONS

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Chinese Annals of Mathematics,Series B 1994年第2期15卷 165-172页

作者： LI YONG WANG HUAIZHONG(Department of Matehematics,jilin University, changchun 130023, jilin, china) jilin UNIV DEPT MATHCHANGCHUN 130023PEOPLES R CHINA

A unified approach is given to several classes of nonlinear boundary value problems, and some previous existence theorems are extended.

关键词： Boundary value problem Existence theorem Brouwer degree,Schauder's fixed point theorem.

Arnold's theorem on properly degenerate systems with the Russmann nondegeneracy

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Science china Mathematics 2005年第12期48卷 1656-1669页

作者： HAN Yuecai & LI Yong College of Mathematics, jilin University, changchun 130012, china 1. College of Mathematics Jilin University 130012 Changchun China

In this paper, we investigate the persistence of invariant tori for the nearly in-tegrable Hamiltonian system H(x,y) = h(y) + εp(x,y) + ε2Q(x,y), where h(y) and εp(x,y) satisfy the Russmann non-degenerate condition. Mainly we overcome the difficulties that the order of the parameter E in the perturbation ε2Q(x,y) is not enough and that the measure estimate involves in parts of frequencies with small parameter.

关键词： Arnold’s theorem the Russmann non-degenerate condition.

Static mechanics analysis of no bumping or vibration welding structure applied in high-speed & heavy-load CWR with single inclined surface

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Science china(Technological Sciences) 2010年第12期53卷 3153-3160页

作者： SONG YuQuan1, LUO WuWei2 & TAO Yi2 1 jilin University, changchun 130022, china 2 Shenyang Railway bureau, Shenyang 110013, china 1. jilin University Changchun 130022 China2. Shenyang Railway Bureau Shenyang 110013 China

Nowadays, the sleeper, railroad bed, welding technology and materials of the high-speed & heavy-load Continuous Welded Rail (CWR) have been improved greatly. However, the orientation relationship between welding surface and rail is still orientation structure, which appeared 185 years ago in UK, namely, the welding surface is normal to the longitudinal direction of the rail. Thus rail welds are subject to vertical pure shear stress, lateral pure shear stress and axial pure tensile stress. Pure shear stress and pure tensile stress are both dangerous stresses, which result in failure of welds under high-speed & heavy-load condition for a long time. When the wheels pass rail welds, it is difficult to avoid vertical bumping and lateral vibration. In order to solve these problems, in this paper we put forward the single inclined welding surface having dip angle α with the lateral rail or dip angle β with the vertical rail and analyze the position geometry and stress state. Thus the vertical bumping and lateral vibration are basically eliminated, then the bearing capacity of the welding surface is significantly improved, and the stress of axial pure tensile and lateral pure shear of the welding surface is reduced.

关键词： continuous welded rail single inclined welding surface bearing capacity stress state regularity

Kernel model-based diagnosis

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Progress in Natural Science:Materials International 2002年第2期12卷 63-67页

作者： OUYANG Dantong(Department of Computer Science, jilin University, changchun 130012, china) jilin Univ Dept Comp Sci Changchun 130012 Peoples R China

The methods for computing the kernel consistency-based diagnoses and the kernel abductive diagnoses are only suited for the situation where part of the fault behavioral modes of the components are known. The characterization of the kernel model-based diagnosis based on the general causal theory is proposed, which can break through the limitation of the above methods when all behavioral modes of each component are known. Using this method, when observation subsets deduced logically are respectively assigned to the empty or the whole observation set, the kernel consistency-based diagnoses and the kernel abductive diagnoses can deal with all situations. The direct relationship between this diagnostic procedure and the prime implicants/implicates is proved, thus linking theoretical result with implementation.

关键词： model-based diagnosis general causal theory prime implicant/implicate diagnostic space.

THE STABILITY AND CONVERGENCE OF COMPUTINGLONG-TIME BEHAVIOUR

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Journal of Computational Mathematics 1999年第4期17卷 397-418页

作者： HaI-jun Wu Rong-hua Li(Institute of Mathematics, jilin University, changchun 130023, china) 吉林大学数学系吉林长春 130023 吉林大学数学系吉林长春

The object of this paper is to establish the relation between stability and convergence of the numerical methods for the evolution equation u(t) - Au - f(u) = g(t) on Banach space V, and to prove the long-time error estimates for the approximation solutions. At first, we give the definition of long-time stability, and then prove the fact that stability and compatibility imply the uniform convergence on the infinite time region. Thus, we establish a general frame in order to prove the long-time convergence. This frame includes finite element methods and finite difference methods of the evolution equations, especially the semilinear parabolic and hyperbolic partial differential equations. As applications of these results we prove the estimates obtained by Larsson [5] and Sanz-serna and Stuart [6].

关键词： stability compatibility covergence reaction-diffusion equation long-time error estimates