简介：你知道埃菲尔铁塔吗？用简单的材料就可以亲手建造一座塔哦!赶快动手试试吧!

简介：在古老的中国，魏王心血来潮决定修建一座极高的塔，并将其命名为——通天塔。

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简介：猴年大年初三，巴黎的香榭丽舍大街和埃菲尔铁塔都变成了中国的红颜色。中国的红灯笼把埃菲尔铁塔装扮得分外妖娆，十分壮观！“中法文化年”正在如火如荼地进行着!

简介：1.IntroductionNorthwest-andNorth-Chinaarerichincoalresources,buttheclimateoftheseregionsissemi-aridandshortofwaterresources.Forthisreason,therecirculatingwatersupplysystemsarepre-dominantlyutilizedinfossilpowerplants.Thenaturaldraftcoolingtowersaregenerallyselectedfortheserecirculatingsystems.Ac-cordingtostatisticsabout50%ofthethermalpowerplantsinChinaareequippedwithnaturaldraftcoolingtowers.Thecoolingtowerswithcast-in-placereinforcedconcretehyperboloidalshellarepreferablyadoptedinChina,becauseofthenot-too-severeclimateinwinter,thelowearthquakeintensitiesand

简介：Thecorrugatedpackingispronetobreakdowneasily,whichcanaffectthetowerefficiencysubstantially.Itistheinnerenvironmentofthevacuumdistillationtowerincludingthetemperatureandchemicalnatureoffluidthatleadtothepackingdamage.Thetheoreticalanalysisindicatesthatitistheinnermaterialflowofvacuumdistillationtowerthatleadstothevibrationofpacking,whichcanaffectthecorrosionfatigueofpackingsignificantly.Meanwhile,themodalshapeandinherentfrequencyofpackingunderprestresscanbeobtainedbymeansofmathematicalanalysis.Basedonthetwokindsofanalysis,theflowinducedvibrationandcorrosionfatigueareaccountableforthefailureofpacking.

简介：Thelargemethanolsynthesistowerindependentlydevel-opedbyHangzhouLindaChemicalTechnologyEngineer-ingCompanyaftersigningacontractinApril2008willbeappliedatthe600kt/amethanolprojectatNinxiaBaota

简介：Tt此次推出的MINITower(A3074)采用全新的热管散热技术，热管的导热工作原理是通过导热介质在封闭真空管内的汽化(蒸发)和液化(冷凝)的相变来传导热量的，这种循环快速进行，CPU的热量可以被源源不断地传导出来，通过铜鳍片将热量散去。由于热管内壁具有粉末烧结的毛细功能，热管散热器在不同的角度使用对性能不会产生太大影响。

简介：许多单个塔的增强的具体核心墙钢框架(RCC-SF)大楼在中国被造了，但是没有不同高度的多塔混血儿系统的大楼。因为它的结构的复杂性和不规则，一座多塔RCC-SF高大楼因此被学习。首先，1/15可伸缩模型结构在次要、中等、主要的地震层次下面在饮料桌子上被设计并且测试。然后，模型结构的动态回答根据类似理论原型结构被解释到那些。试验性的结果证明尽管有结构的复杂性，侧面的变丑作为“弯曲类型”和墙多于钢框架贡献抵抗地震负担的RC核心弯曲。在次要的地震下面造的建筑群的最大的内部故事的飘移是稍微在远处，有弹性的限制用汉语规定代码，和会在主要地震下面编码要求。从测试结果，一些建议是如果能在地震行为和大楼的排水量上贡献有利效果。

简介：在这篇论文，评估along-wind-induced的一个分析框架一个传播塔的动态回答被介绍。二个分析模型和一个新方法被开发：(1)一个更高的模式概括了力量光谱(GFS)传播塔的模型被推出；(2)包括更高的模式的贡献的一个分析模型进一步作为一个合理代数学的公式被导出估计结构的排水量反应；并且(3)一条新途径，与排水量(ALD)使用负担而不是力量，塔被给解决传播的内部力量。不同于常规方法，ALD方法能避免计算相等的静态的风负担(ESWL)。最后，传播塔结构被用作一个数字例子验证ALD方法的可行性和精确性。

简介：Thispaperisconcernedwithanumericalsolutionofhyperboliccoolingtowershell,aclassoffullnonlinearproblemsinsolidmechanicsofconsiderableinterestinengineeringapplications.Inthisanalysis,thepost-bucklinganalysisofcoolingtowershellwithdiscretefixedsupportandundertheactionofwindloadsanddeadloadisstudied.Theinfluencesofring-stiffeneroninstabilityloadarealsodiscussed.Inaddition,anewsolutionprocedurefornonlinearproblemswhichisthecombinationofloadincrementiterationwithmodifiedR-Care-lengthmethodissuggested.Finally,someconclusionshavingimportantsignificanceforpracticeengineeringaregiven.

简介：Theflowfieldinthehyperbolicnaturaldraftwet-coolingtower,whichhasgreateffectsontheeconomyandsecurityofpowerplant,wasstudiedthroughnumericalsimulation.Themathematicalmodelwasestablishedandanalyzedinordertooptimizethecooling-towerandtoevaluateitsefficiency.Variousworkingconditionswereconsideredandcomparedwitheachother,suchasthecirculatingwaterflux,airtemperatureandtowerresistance.Itisconcludedthatwhenthecooling-towerrunswithoutwind,thereisavacuumregioninsidethetowerandthepressureriseswiththeincreaseofthetowerheight.Meanwhile,theinnerflowfieldisaxisymmetrical.Theairvelocityachievesitsclimaxattheaxis.Itisalsofoundthattheeffectofcirculatingwatertemperatureisequivalenttothatofthewaterflux.

简介：摘 要 建筑业面临的主要挑战之一是对建筑在使用寿命内如何进行质量管理。本研究结合悉尼 Opal Tower 进行实例质量管理分析研究。首先，概述案例项目重点关注的质量问题和事故，以及研究了当地和全球类似项目的优秀质量管理案例。最后，讨论建筑行业这些重大挑战面临的未来发展和机遇。

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简介：A3DfiniteelementmodelfortheTaizhouYangtzeRiverBridge,thefirsttriple-towerlong-spansuspensionbridgeinChina,isestablishedbasedonthenonlinearfiniteelementsoftwareABAQUS,andthedynamiccharacteristicsofthebridgeareanalyzedusingtheLANCZOSeigenvaluesolutionmethod.Thestudyfocusesontheeffectsofthevertical,lateralandtorsionalstiffnessofthesteelboxgirder,therigidcentralbuckleandtheelasticrestraintsconnectingthetowersandthesteelboxgirderonthedynamiccharacteristicsofthetriple-towersuspensionbridge.Ourresultsshowthat,ingeneral,thedynamiccharacteristicsofthetriple-towersuspensionbridgearesimilartothoseoftwo-towersuspensionbridges.Thevertical,lateralandtorsionalstiffnessofthesteelboxgirderhavedifferenteffectsonthedynamiccharacteristicsoftriple-towersuspensionbridges.Theelasticre-straintshaveamoresignificanteffectonthedynamiccharacteristicsthanthecentralbuckle,anddecreasingthestiffnessoftheelasticrestraintsresultsintheappearanceofalongitudinalfloatingvibrationmodeofthebridge.Also,rigidcentralbuckleshaveagreaterinfluenceonthedynamiccharacteristicsoftriple-towersuspensionbridgesthanonthoseoftwo-towersuspensionbridges.Theresultsobtainedcouldserveasavaluablenumericalreferenceforanalyzinganddesigningsuper-long-spantriple-towersuspensionbridges.

简介：TheGCtypeaxiallow-pressuremethanolsynthesistowerdevelopedbyNanjingGuochangChemicalEngineeringCompanyhadpassedappraisalorganizedbyChinaPetroleumandChemicalSociety.Thistechnologyhasbeenfirstsuccessfullyappliedonthe50kt/alow-pressuremethanolunitoperatedbyShandongJiutaiChemicalTechnologyCompany,

简介：Inthehillyregionduetoscarcityoftheplainarea,buildingslikesetback-stepbackaremoreoftenusedandalsoasabigsurgeinthetelecommunicationindustries,rooftoptoweradaptationisverycommonstorynowadays.Inthepresentstudyananalogyhasbeendrawntofindouttheinfluenceoftherooftoptelecommunicationtoweronthesetback-stepbackbuildingrestingongroundat20°and30°slopes.Adynamicanalysishasbeenperformedandcomparedonthe4leggedangledsectiontelecommunicationtowerwhichislocatedontherooftopofsetback-stepbackbuildingbyvaryingpositionsoftowerwiththeexistinghoststructurebuiltupongroundslopeof20°and30°inbothdirections(XandY).

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简介：使用一个多级式的摆钟团的可能性更潮湿(MSPMD)部分地理论上被学习在建设期间控制一座留下来电缆线的桥的一个单个列塔的导致风的颤动我这个工作。在这篇论文，为减少桥塔颤动的MSPMD的表演试验性地被学习。一个MSPMD模型和有几何学可伸缩1:100的桥的一个塔模型被设计并且生产。有不同电线长度的MSPMD模型的刻度被进行验证分析模型更潮湿。为不受管束的独立的塔，有电报的塔，和与MSPMD模型一起的塔的一系列测试然后在泛音和白噪音刺激下面被执行。试验性的结果证明塔模型的回答显著地与MSPMD模型的安装减少，它表明MSPMD的有效性减轻桥塔的颤动。