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XUZe-shui 《系统科学与系统工程学报(英文版)》2002,11(1):1-5
1 IntroductionWe consider the unconstrained optimizatoin problem( P) :minf( x) ,x∈ Rnwhere f:Rn→R is continuously differentiable and its gradient f( x) is denoted by g( x) .The conjugate gradient method is useful for calculating local unconstrained optimizationproblem of differentiable functions of many variables,it has the following form:xk 1 =xk λkdk ( 1 .1 )dk=-gk,k =1-gk βkdk- 1 ,k 2 ( 1 .2 )whereλk is a step-size obtained by a line search,andβk is a parameter,which can beobtaine… 相似文献
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1 IntroductionPurely quantitative methods are in a dilemma situation for coping with the real worldproblem,particularly with respectto social and economic problems. The reason is thatthemotivation of pursuing science requires researchers to describe these complex socialproblem accurately,then solve these quantitatively mathematical models so as to discoverthe rules of system movement and furthermore forecast the behaviors of system in thefuture.On the otherhand,these social problemsofthe rea… 相似文献
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A Tree Structure Storage Model of BOM 总被引:8,自引:0,他引:8
1 The Structure Analysis of BOMIn recentyears civil enterprises in increasing numbers begin to recognize the significance ofimplementing MRP .One key step of implementing MRP is building dependable BOM( Bill of Material) .so a reliable and high flexible BOM storage form should be built.Billof Material,BOM,which is the Technique document on illuminating the productstructure,is used to demonstrate the structure and relationship between the final product( never processed in current en… 相似文献
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1 IntroductionThere often existsome network optimization problems with parameters in many real prob-lems.But the effective algorithms are not given because of complexity with parameters.Inthis paper,we propose an effective algorithm for solving the short… 相似文献
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1 Introduction DealsMost inventory- production models assume that the demands are influenced by randomlyfluctuating environment.Under the assumption of probability distribution being known,many researches on inventory optimization and control problem ha… 相似文献
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1 IntroductionData mining is the process of discovering interesting knowledge from large amounts of datastored either in database,data warehouses,or information repositories. The mining ofassociation rules is one of the most important topics in the field of data mining. Variousmining algorithms about association rules have been discussed in many literatures such as[1]and[2 ].The linguistic valued association rules are discussed in this paper.In Section2 ,the FCM algorithm in [3]is adopted t… 相似文献
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The Similar Structures and Control Problems of Complex Systems 总被引:2,自引:0,他引:2
ZHANGSi-ying 《系统仿真学报》2002,14(11):1455-1457
1 Introduction1 We consider the naturally evolving complex systems, such as biotic and social systems. In their evolving process, they always make up their weaknesses and develop their favorable factors. In such a way, their structures are gradually formed. In the structures of these systems, a feature is noteworthy, i.e., the local(partial) structure is similar to the global(overall). For social systems, for instance, in a country, the management organization of a province is similar to tha… 相似文献