智能设计关键技术的研究及其在甘蔗收获机械中的应用

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1、重庆大学博士学位论文中识别和提取出潜在的知识，揭示出蕴涵在这些数据背后的内在规律。通过基于粗集理论的属性约简与值约简，在简化决策表的同时，找出对决策信息具有重要影响的属性，获得专家级的领域知识，从而为神经网络的推理过程作出解释，为开发设计人员提供决策支持。5)针对甘蔗收获机械领域知识的多样性、复杂性，提出了集成符号主义与连接主义的知识模型，同时采用了面向对象的混合知识表示方法构建知识库系统及集成多种推理方法的知识应用机制，从而实现对知识的高效运用。关键词：甘蔗收获机械，智能设计，模糊理论，神经网络，粗集理论II英文摘要ABSTRACTChinaisoneofthemajorcountrieso

2、fplantingsugarcaneandproducingsugar.Thedevelopmentofthecombinedsugarcaneharvestertorealizethemechanizedharvestisveryvaluableandsignificanttoenhanceproductivity,decreaseproductioncostandpromotetheinternationalcompetitivepowerofChina.Thedevelopmentofsugarcaneharvesterneedsnotonlyalargenumberofexpertis

3、esbutalsoperfecttechniqueofsolvingproblem.Tointroduceintelligentdesigntechnologyintotheproductdesignisbeneficialtoincreasethelevelofdesignautomationandintelligence.Meanwhile,tocompromisetheexpertiseandtheprocedureoftheproductdesignisadvantageoustopromotetheproductquality,reduceproductioncosts,andsho

4、rtenthedevelopmentcy-cleofproduct.Inthisdissertation,theknowledge-basedintelligentdesignsystemofsugarcaneharvesterispresented,whichisintegratedwiththeartificialintelligenttech-nology.Also,severalkeytechnologiesofintelligentdesign,fuzzytheory,neuralnet-work,androughset,areanalyzedbasedonthedevelopmen

5、tprocedure,andappliedintotheintelligentdesignsystemofsugarcaneharvester.Fuzzytheoryisutilizedtodisposethesimulationandexperimentalresultstoprovidetheintelligentanalysisandevaluationwiththeexperientialknowledge.Neuralnetworktechnologyisusedtoacquirethehid-denknowledgefromtheresultstorealizetheeffecti

6、vereasoningandapplicationofknowledge.Androughsettheoryisappliedtoreduceandunitizetheexperientialknowledgetofindouttheimportantattributesaffectingthepolicydecisionandextracttheexpertdesignknowledgefromthesimulationandexperimentalresults.Accordingtothesestudies,theintelligentdesignsystemofsugarcanehar

7、vesterisbuiltuptoprovideaneffectivetoolfortheplandesignandperformanceanalysisofsugarcaneharvester.Themajorcontentsofthepaperarethefollowings.1)Accordingtotheavailablestudyachievementsandthedesignproce