检索结果-南通市图书馆

Dual worth trade-off method and its application for solving multiple criteria decision making problems

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2006年第3期17卷 554-558页

作者： feng junwen School of Economics and Management Nanjing Univ. of Science and Technology Nanjing 210094 P. R. China

To overcome the limitations of the traditional surrogate worth trade-off （SWT） method and solve the multiple criteria decision making problem more efficiently and interactively, a new method labeled dual worth tradeoff （DWT） method is proposed. The DWT method dynamically uses the duality theory related to the multiple criteria decision making problem and analytic hierarchy process technique to obtain the decision maker＇s solution preference information and finally find the satisfactory compromise solution of the decision maker. Through the interactive process between the analyst and the decision maker, trade-off information is solicited and treated properly, the representative subset of efficient solutions and the satisfactory solution to the problem are found. The implementation procedure for the DWT method is presented. The effectiveness and applicability of the DWT method are shown by a practical case study in the field of production scheduling.

关键词： decision theory multiple criteria decision making trade-off analysis duality theory analytic hierarchy process.

A Table Based Algorithm for MinimumDirected Spanning Trees

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2001年第1期12卷 22-28页

作者： feng junwen School of Economics and Management, Nanjing University of Science and Technology, 210094, P. R. China School of Economics and Management Nanjing University of Science and Technology 210094: P. R. China

As far as the weighted digraph is considered, an optimal directed spanning tree algorithm called table based algorithm (TBA) is proposed in the paper based on the table instead of the weighted digraph. The optimality ... 详细信息

关键词： Optimal spanning tree problem Digraph Directed tree Table representation.

An Explicit Integer Programming Model of the Minimal Spanning Tree Problem for Digraphs with Asymmetric Weights

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 1998年第2期9卷 70-81页

作者： feng junwen(Naming University of Science and Technology, 210094, P. R. China) Nanjing University of Science and Technology 210094 P. R. China

As far as the minimal spanning tree problem for the digraph with asymmetric weightsis concerned, an explicit integer programming model is proposed, which could be solved successfullyusing the integer programming packages such as LINDO, and furthermore this model is extendedinto the stochastic version, that is, the minimal spanning tree problem for the digraph with theweights is not constant but random variables. Several algorithms are also developed to solve themodels. Finally, a numerical demonstration is given.

关键词： Minimal spanning tree Digraph Integer programming Asymmetric weight Stochastic spanning tree

Competence Set Analysis Under Risk and Uncertainty

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2001年第2期12卷 12-18页

作者： feng junwen School of Economics and Management, Nanjing University of Scienece and Technology, 210094, P. R. China School of Economics and Management Nanjing University of Scienece and Technology 210094 P. R. China

The competence set analysis technology can be applied to solve the decision making problems successfully and satisfactorily. This paper mainly focuses on the expanding strategy research and development of the competence set under risk and uncertainty. A systematic expression of the competence set analysis is described, several expanding principles and strategies with regard to several different cases are presented, and their applications in the personnel training program are discussed, some conclusions and suggestions to be developed in a further work are included.

关键词： Competence set analysis Competence expansion Decision analysis Habitual domain Risk and uncertainty analysis Expansion principle and strategy.

The Hierarchical Optimism Index Method for Decision Analysis under Uncertainty

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1998年第3期8卷 48-54页

作者： feng junwen Nanjing University of Science and Technology, Nanjing 210094

As far as the uncertain decision analysis problems are concerned, a decision principle called Hierarchical Optimism Index Decision Principle is proposed, based on which a decision analysis method under uncertainty called Hierarchical Optimism Index Method labeled HOIM is developed, in which the hierarchical optimism index of the decision maker for the uncertaion states is obtained in an interactive way involving the dialogue between the decision analysis and the decision maker. Method HOIM has good decision making properties, can be widely applied to the routine decision problems, and is an important model and tool for the decision support system(DSS). Finally, a practical case study is given to illustrate the applicability of the method.

关键词： decision analysis decision principle uncertainty analysis decision support model interactive method

Microstructure evolution,mechanical properties and fracture behavior of Al-xSi/AZ91D bimetallic composites prepared by a compound casting

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第5期12卷 1944-1964页

作者： Guangyu Li Wenming Jiang feng Guan junwen Zhu Yang Yu Zitian Fan State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

In this paper,the effect of the Si content on microstructure evolution,mechanical properties,and fracture behavior of the Al-xSi/AZ91D bimetallic composites prepared by compound casting was investigated *** obtained results showed that all the Al-xSi/AZ91D bimetallic composites had a metallurgical reaction layer(MRL),whose thickness increased with increasing Si content for the hypoeutectic Al-Si/AZ91D composites,while the hypereutectic Al-Si/AZ91D composites were *** MRL included eutectic layer(E layer),intermetallic compound layer(IMC layer)and transition region layer(T layer).In the IMC layer,the hypereutectic Al-Si/AZ91D composites contained some Si solid solution and flocculent Mg_(2)Si+Al-Mg IMCs phases not presented in the hypoeutectic Al-Si/AZ91D ***,increasing Si content,the thickness proportion of the T layer increased,forming an inconsistent preferred orientation of the *** shear strengths of the Al-xSi/AZ91D bimetallic composites enhanced with increasing Si content,and the Al-15Si/AZ91D composite obtained a maximum shear strength of 58.6 MPa,which was 73.4% higher than the Al-6Si/AZ91D *** fractures of the Al-xSi/AZ91D bimetallic composites transformed from the T layer into the E layer with the increase of the Si *** improvement of the shear strength of the Al-xSi/AZ91D bimetallic composites was attributed to the synergistic action of the Mg_(2)Si particle reinforcement,the reduction of oxidizing inclusions and the ratio of Al-Mg IMCs as well as the orientation change of the MRL.

关键词： Al/Mg bimetallic composites Si content Mg_(2)Si reinforcement Microstructure Mechanical properties Fracture behavior

Allocation Planning for R&D with Uncertainty:Model and Procedure

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1993年第3期3卷 204-210页

作者： feng junwen Nanjing University of Science & Technology, Nanjing 210014, China

A decision support model with the stochastic objective function measuring the benefit contributions of projects and stochastic resource constraint and its decision making analysis procedure with the case study are presented for selecting R&D projects, in which the uncertainty in project evaluation and selection, the technical or outcome, cost or resource and benefit or payoff interrelationships among projects, and the experience and knowledge of the R&D manager can be considered.

关键词： decision analysis decision support system R&D project selection risk decision uncertainty decision allocation planning.

Order　Structure　Analysis（OSA）　for　the　Optimal　Solutions　of　Multiple　Objective　Mathematical　Programming

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1994年第1期4卷 26-32页

作者： feng junwen(Soft Science Research Institute,Nanjing University of Science & Technology,Nanjing 210014)

In this paper,a variety of solution concepts are trifled into an order structure framework,the concept of the order structure function(OSF) is presented,based on which, a now-type solution for MCDM-OSF-efficient solution or called in this study()-efficient solution,wed efficient solution and strong()-efficient solution,etc.,is proposed. It be been proved that the optimal solution of MCDM or MMP in verious senses,such as the Pareto efficient solution,G-efficient soluition,H-efficient solution,etc.,all can be considered as the special cases of the OSF-efficient solution for the special s and ***,the application of the OSF-efficient solution is discussed.

关键词： multiobjective mathexnatical programming efficient solution order structure multiple criteria decision making

A Decision Support Model and Procedure for Selecting Interrelated R&D Projects

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1993年第1期3卷 21-35页

作者： feng junwen Soft-Science Research Institute, East China Institute of Technology, PRC.

A decision support model with stochastic multiobjective functions and constraints and its solution procedure are presented for selecting R&D projects, in which the uncertainty of project evaluation and selection, the interactions of technique, resource and benefit among projects, and the experience, knowledge and preference of R&D managers are considered. The statistical results of stochastic factors representing the benefit contributions and the three kinds of interactions corresponding to each objective among projects are obtained by the Delphi method and QS/NI decision process for developing the model. In the decision analysis solution procedure, experiences and preferences of R&D managers to make decisions are considered by means of aspiration goal levels(AGL), probabilities to reach AGL called satisfied degrees, and probabilities to satisfy the corresponding constraints called feasible degrees, under which a project selection plan can be proposed by the decision analyst or computer. The utility of this model and solution procedure are demonstrated by a real world case example in R&D program of strength and vibration of aircraft turbine engines. which involves 23 project candidates. The evalutions of benefit contributions and interactions of projects are made by 41 experts in the field.

关键词： stochastic decision analysis project selection decision making multiobjective analysis risky decision uncertainty interactive decision method satisfactory solution.