简介:Thecoolingandheatingloaddistributionoflargeareaair-conditionedroomsuchas'open'offices,shoppingmallsandwaitingroomsisusuallyassumedtobeeveninairconditioningsystemdesign.However,itisnotthecaseinreality,andalowefficientairconditioningsystemresultsfromthisassumption.AsimulationandanalysisofthecoolingloaddistributionofanofficebuildinginHongKongwithTRANSYSsoftwareisprovidedinthispaper.Atypicalofficeisdividedinto13zonesforsimulation,includingexternalzone,medialzoneandinternalzoneinthenorth,thesouth,theeastandthewestrespectivelyandacentralzone,insteadof4directionalzone.Theresultshowsthereismuchcoolingloaddifferencebetweeneachzone,andmoreattentionshouldbepaidtounevenindoorcoolingandheatingloaddistributiontofurtherguidethedesign.
简介:Withthetermsoftheexactseriessolutiontakenastrialfunctions,themethodofpointcollocationwasusedtocalculatethelargedeflectionofacircularplate.Theaxisymmetricalbendingformulaeweredevelopedforthecalculationofacircularplatesubjectedtopolynomialdistributedloads,aconcentratedloadatthecenter,uniformradialforcesandmomentsalongtheedgeortheircombinations.Thesupportmaybeelastic.Thebucklingloadwascalculated.Underactionofuniformlydistributedload,centralloadortheircompoundload,solutionswerecomparedwiththoseobtainedbyothermethods.Bucklingbeyondcriticalthrustwascomparedwiththatcalculatedbythepowerseriesmethod.Themethodpresentedinthispaperhasadvantagesofwideconvergentrange,highprecisionandshortcomputingtime.Moreover,thecomputingtimeisnearlyindependentofthecomplexityoftheloads.
简介:有在直径的30m和在高度的6m的大规模桶基础被用作风汽轮机的基础。宽浅的基础与有到直径的高度的高比率的传统的桶基础不同。新类型基础的cover-load-bearing模式能抵抗更多的外部装载。完成适用的模式,在桶内的泥泞土壤应该被增强,它将改进土壤力量并且转变为土壤和基础整个部分抵抗外部装载。增强方法的真空和电镀物品渗透的土壤在实验被使用。结果证明泥泞土壤的适用的行为被否定压力和电镀物品渗透的效果有效地改进,并且有更好的力量的改进泥泞土壤能和桶基础工作,意味着新桶基础的最高封面的适用模式被完成。在增强过程的土壤期间,基础向下移动了,即,基础的解决几乎在真空和电镀物品渗透的方法引起的预装的过程期间被完成。
简介:天体的跨matching是为聚集不同波长的观察数据的一个基本方法。由数据聚集,天体的目标的性质能包括地被理解。在减少瞄准时间在I/O上消费了操作,几个改进方法被介绍,基于养模特儿的边界包括处理流动,它能减少数据库询问操作;能改进任务分区的表演并且解决数据稀少的问题的最大的成长块和它的决心的一个概念;并且计算这个索引的一个快bitwise算法附近的块数,它是一条重要效率保证。实验证明方法能有效地在稀少的数据集和高密度的数据集上加快跨matching。
简介:In2010,thefirstoffshorewindturbinewithintegratedinstallationwasestablishedinQidongseaareaofJiangsuProvince,China,whichledtotheimplementationphaseofone-step-installationtechniquebasedonthedesignandconstructionoflarge-scalebucket-top-bearing(LSBTB)bucketfoundation.ThecriticaltechniqueofLSBTBbucketfoundationincludedself-floatingtowing,penetrationwithadjustmentofhorizontallevelness,removabilityandone-step-installation.Theprocessofone-step-installationincludedtheprefabricationofLSBTBbucketfoundationinonshoreconstructionbase,installationanddebuggingofwindpower,overallwatertransportationoffoundationandwindpowersystem,andinstallationoffoundationandoffshorewindturbineontheappointedseaarea.Thecostofone-step-installationtechniquewasabout5000Yuan/kW,whichwas30%-50%lowerthanthatoftheexistingtechnique.TheprefabricationofLSBTBbucketfoundationtookabouttwomonths.Duringtheone-step-installationprocess,theinstallationanddebuggingofwindpowerandoverallwatertransportationneedaboutonetotwodaysinseaareawithin35mdepth.Aftertheproposedtechniqueisindustrialized,thecostwillbefurtherreduced,andtheinstallationcapacityisexpectedtobeupto500windturbinesperyear.