简介:Themarkingschememethodremovesthelowscoresofthecontractor'sattributesgivenbyexpertswhentheoverallscoreiscalculated,whichmayresultinthatacontractorwithsomelatentriskswillwintheproject.Inordertoremedytheabovedefectofthemarkingschememethod,anoutlierdetectionmodel,whichisonemissionofknowledgediscoveryindata,isestablishedonthebasisofthesumofsimilarcoefficients.Then,themodelisappliedtothehistoricalscoredataoftenderevaluationforci...
简介:在中学实行数学建模的教学,可使学生学会用数学的思维方式去观察、分析现实社会,去解决日常生活中的数学问题,进而形成勇于探索,敢于创新的科学精神。
简介:摘要:在混凝土连续梁施工中,挂篮的合理设计直接影响到施工安全、质量和工效。文章以一公路连续桥梁为例,考虑节段长度与重量等因素,针对竖向变形控制分析更合理的优化设计。 结果表明,选择合适的挂篮主桁架形式对挂篮整体竖向变形具有显著影响,对于应力安全有富余而变形较大的结构可采取重点优化挂篮主桁的措施。研究成果可为相似施工情况提供参考。
简介:Theidentificationofthecriticalinfrastructurehasshownthatthebuildcivilengineeringinfrastructureisalmostinvolvedeverywhere,evenwiththeIT-infrastructure.Therefore,thepassivesafetyofstructuresisdemanded.Securityassociationshaveanalysedthatmostassaultscamealongwithexplosionandimpactscenarios,whichamountin80%ofassaults.Consequently,thesearetheextraordinaryloadsthestructureshavetobeplannedanddesignedfor.Tocarryoutsuchanengineeringjob,theengineerhastobeeducatedinmultipledisciplinesasphysics,materialscience,continuummechanics,numericalmechanics,testing,structuralengineeringandrelatedspecificfieldsaswavepropagationetc.Inthispaperwewillconcentrateonthesubjectsofnumericalsimulationandtesting.
简介:研究用图解法、simplexmethod和匈牙利法建立LinearProgramming的数学模型并求得了最优解.结果表明:对仅有两个变量的LinearProgramming,既可通过图解法求得最优解;也可用单纯形表简便地求得最优解;而对任务和人数不等的assignmentproblem,则用匈牙利法求最优解。