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Health management based on fusion prognostics for avionics systems

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Journal of Systems Engineering and Electronics 2011年第3期22卷 428-436页

作者： jiuping xu Lei xu Uncertain Decision-making Laboratory Sichuan UniversityChengdu 610064China

Health management permits the reliability of a system and plays a increasingly important role for achieving efficient system-level *** has been used for remaining useful life（RUL） prognostics of electronics-rich system including *** and health management（PHM） have become highly desirable to provide avionics with system level health *** paper presents a health management and fusion prognostic model for avionics system,combining three baseline prognostic approaches that are model-based,data-driven and knowledge-based approaches,and integrates merits as well as eliminates some limitations of each single approach to achieve fusion prognostics and improved prognostic performance of RUL estimation.A fusion model built upon an optimal linear combination forecast model is then utilized to fuse single prognostic algorithm representing the three baseline approaches correspondingly,and the presented case study shows that the fusion prognostics can provide RUL estimation more accurate and more robust than either algorithm alone.

关键词： prognostics and health management(PHM) avionics system fusion model prognostic approach remaining useful life(RUL).

EMISSION ABATEMENT FOR PRODUCTION SYSTEM ACROSS LOCATIONS WITH HETEROGENEOUS EMISSION PROFLES

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Journal of Systems Science and Systems Engineering 2017年第4期26卷 531-548页

作者： Peng Wu jiuping xu School of Business Sichuan University Chengdu 610064 China Engineering Research Center of Low Carbon Technology and Economy Sichuan University Chengdu 610064 China

This paper investigates a production system in which the desired system state is a reduction of emissions and the controlling action plan is altering carbon price. From the operations perspective, we develop a model to study how increasing carbon emission costs may affect the joint production and location decisions for a manufacturer across different locations. Specifically, our model incorporates economies of scale and explicitly links product demand, production costs and carbon emission levels to location decisions. The firm＇s decisions in production batch size and locations are then optimised. The system state of emission are analysed under different carbon prices. Finally we check the alignment of objectives in costs and emissions for the system. The results show that for a production system with economies of scale, the production allocation is transformed to a location choice problem after optimising the costs. Raising the carbon price reduces the carbon emissions but may not be able to induce the production to be placed in an emission efficient place. We propose a hybrid policy combining carbon price and free emission allowance to fully align the cost efficiency and emission efficiency and characterise the link between the emission target and the carbon price.

关键词： Carbon emissions Economic Order Quantity (EOQ) model carbon price emissionallowance and location choice

CYBERNETIC PARADIGM BASED INNOVATIVE APPROACHES TOWARDS COPING WITH CLIMATE CHANGE

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Journal of Systems Science and Systems Engineering 2017年第3期26卷 359-382页

作者： Yi Lu jiuping xu Uncertainty Decision-making Laboratory Sichuan University Chengdu 610064 China Engineering Research Center of Low Carbon Technology and Economy Sichuan University Chengdu 610064 China

Increasing carbon emissions from large-scale human activities have contributed to global climate change, which has resulted in an increase in significant human crises. Therefore, as carbon abatement is a public good, coping with climate change is also a public-good; however, it suffers from many free-rider incentives, leading to a tragedy of the commons. Overcoming this challenge from a systemic perspective, requires that all sectors such as industry, government, and citizens on global, national, and regional levels engage in low-carbon development and the implementation of fair and efficient climate policies. Through a theoretical exploration of carbon abatement and a systemic description of low-carbon systems, this paper developed a cybernetic framework for coping with climate change, which consists of a cloud platform for data analysis, meta-synthetic engineering for decision support, a polycentric approach to extensive consultation and various functional goal achievement modules. On this basis, by combining the ＂invisible hand＂ and ＂visible hand＂ and by integrating negotiation at the global level, cooperation at the national level and knowledge at the local level, a multilevel policymaking model is proposed to address complex climate change problems. This cybernetic paradigm based innovative approach could provide valuable illumination to stakeholders seeking to cope with climate change.

关键词： Cybernetics climate change carbon abatement public good low-carbon development

Effects of Ag layers on the SiO2/FePt thin films deposited by magnetron sputtering

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Rare Metals 2008年第1期27卷 13-17页

作者： FAN jiuping xu Xiaohong WANG Fang JIANG Fengxian TIAN Baoqiang JIN Tao School of Chemistry and Materials Science Shanxi Normal University Linfen 041004 China

The effects of Ag layers with different locations and thicknesses on the structural and magnetic property of SiO2/FePt multilayer films were *** non-magnetic Ag layer plays an important role in inducing（001） orientation and ordering of FePt grains,as well as the SiO2-doping reducing the grain size and the magnetic exchange coupling between *** the 10 nm Ag layer is moved from the bottom to the top of the SiO2/FePt multilayer film,the coercivity gradually decreases;the largest difference between the out-of-plane coercivity and the in-plane one is obtained in the sample of [SiO2（2 nm）/FePt（3 nm）]3/Ag（10 nm）/[SiO2（2 nm）/FePt（3 nm）]***,the location of Ag layers was fixed and the thickness was *** XRD curves suggest that the intensity of the（001） peak becomes the strongest with the addition of 10 nm Ag layers.

关键词： [SiO2/FePt]5 multilayer perpendicular orientation magnetron sputtering coercivity

A KIND OF FUZZY MULTI-OBJECTIVE LINEAR PROGRAMMING PSOBLEMS BASED ON INTER VALVALUED FUZZY SETS

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Journal of Systems Science & Complexity 2001年第2期14卷 149-158页

作者： xu jiuping (Department of Applied Mathematics, Sichuan University, Chengdu 610065, China) 四川大学四川成都 610065

This paper presents a general solution procedure and an interactive fuzzy satisfying method for a kind of fuzzy multi-objective linear programming-problems based on interval valued fuzzy sets. Firstly, a fuzzy set of the fuzzy solutions, which can be focused on providing complete information for the final decision, can be obtained by the proposed tolerance analysis of a non-dominated set. Secondly, the satisfying solution for the decisionmaker can be derived from Pareto optimal solutions by updating the current reference membership levels on the basis of the current levels of the membership functions together with the trade-off rates between the membership functions.

关键词： Fuzzy number interval-valued fuzzy sets multiple objective linear programming interactive fuzzy satisfying method parametrically interval values.

An Interval-valued Approach to Calculation ofNonequilibriumThermodynamics with Imprecise Information

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Systems Science and Systems Engineering 1999年第1期9卷 119-128页

作者： xu jiuping LUO Jiuli(Department of Chemistry,Sichuan University, Chengdu 610064, China)

The research of the imprecision of a nonequilibrium thermodynamic system is justifiedby the structural and parametric uncertainties of such systems. The paper gives an interval-valuedformulation of the phenomenological equations and shows a realistic approach for studying the entropyproduction in Physical systems, the time trajectories of chemical reactions, etc. Using algorithms derivedfor special reaction systems, bundles of time trajectories with prescribed boundary possibility measuresare calculated.

关键词： interval-valued number measure of imprecision nonequilibrium thermodynamics imprecise dynamic systems

ANALYSIS OF REGIONAL ECONOMY GROWTH WITH THE THEORY OF DIFFERENTIAL SYSTEM DYNAMICS

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Journal of Systems Science & Complexity 2003年第4期16卷 541-549页

作者： xu jiuping LIU Jicheng (School of Business and Administration, Sichuan University, Chengdu 610065, China) School of Business and Administration Sichuan University Chengdu 610065

In order to describe the interrelation forces among different regions during the economic growth, this paper introduces and analyzes the dynamical system model with the theory of differential systems dynamics. A pract... 详细信息

关键词： differential systems dynamics interrelation population migration

The Research on Comprehensive Evaluation of Enterprise Technical Innovation Ability

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The Research on Comprehensive Evaluation of Enterprise Techn...

Econometric Model in Qingchuan County

战略与管理工程：企业、环境与危机——2009战略管理国际会议

作者： LI Xiaofeng xu jiuping School of Business and Administration Sichuan University

Faced with the challenge of the knowledge economy in 21 st century,it is of importance strategic meaning to evaluate enterprise technological innovation ability scientifically for the long-term development of Chinese *** this paper,on the foundation of the knowledge description of enterprise technological innovation ability,firstly,the authors establish the comprehensive evaluation index system of enterprise technological innovation ability,and then they put forward the evaluation model of enterprise technological innovation ability based on BP neural network,which provides the theoretical guidance on evaluating enterprise technological innovation ability *** the end of this paper,through application analysis,the authors explain how to use this model in actual problems.

关键词： Enterprise Technological Innovation Ability Index System BP Neutral Network Evaluation Model

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Systems Science and Systems Engineering 1995年第4期5卷 35-49页

作者： xu jiuping LIU Guangzhoug WANG Rui (Dept. of Applied Mathematics, Chengdu University of Science and TechnologyChengdu 610065, China)

This model mainly contains four parts:Ⅰ Discuss the cacutated economical model’s definition including its major form. the theones and methods of economy and mathematics which have been used in brief; discuss briefly the character and advantage and some main function of CEM; (notice: CEM -Caculated Economical Model; CE: Caculated Economy). At the same time. we point out some limitations of CEM.Ⅱ On the basis of actal situations of Qingchuan county. illustrate that the principles and purposes in building CEM of Qingchuan; and describe the entire structure of the model.Ⅲ Make out the definitions of variables. the explaination of variables mark in model. The equation system of model; and explain briefly some equation’s structures in the model system.Ⅳ Based on the equations system of CEM. analyze the estate structure existing inQinschuan county. lead out the scheme of opitimal estate structure and forecast the economic development direction in coming ten years in Qingchuan county.

关键词： economic development scheme forecast industry structure developing plan