简介:新奇分布式的调节液体更潮湿(DTLD)在这篇论文为在结构减少颤动被建议。DTLD的基本工作原则是在cast-in-situ的管子或框内充满空空格空的有水或另外的液体的增强的水泥(RC)地板平板。管子或盒子然后在结构内作为一系列小TLD工作,到增加全部结构的系统的抑制比率。为联合的fluidstructure的报道完成的数字模拟被执行评估DTLD的颤动减小效率。结果证明DTLD能更加增加抑制结构并且因此减少它的颤动。一个另外的好处是DTLD不要求建筑上的空间被加到结构。
简介:<正>1IntroductionHaloarchaearepresentsadistinctgroupofArchaeathattypicallyinhabitshypersalineenvironments,suchassaltlakesandseasalterns.Theyareeasytocultureandmanyhaloarchaeaaregeneticallytractable,hencetheyareexcellentmodelsystemsforresearchofarchaealgenetics,
简介:Searchingforpetroleum!Firstitwasonshore,datingbacktotheancientcivilizationsofEgypt,Mesopotamia(Iraq),Iran,andChina,butbecomingamodernindustryafterEdwinDrake'ssuccessfuldrillinPennsylvaniain1859.Thenitwasoffshore,withthefirstwelldrilledatSummerland,California,in1897,butthedrillingremainedinwaterdepthsof35feetfordecades.Finally,albeitgradually,
简介:Vacuumloadinghasbeenexaminedasawayofpreparinguniformlyconsolidatedsoftclaysamples.Thefacilityandloadingprocedurearedescribedinthispaper.Ananalyticalsolutiontothethreedimensionalconsolidationequationisderivedforestimatingthedegreeofconsolidationofthesoilsamplewithvacuumloading.Thegivenexampleshowsthatthepredicteddegreeofconsolidationofasoftclaybulkwithvacuumloadingisclosetothatmeasuredintheconsolidationprocess.
简介:AneuploidyembryosofPinctadamartensiiDunkerareproducedduringtetraploidinductionbyinhibitingthefirstpolarbodyineggsfromtriploidfertilizedwithhaploidspermswithcytochalasinBtreatment.Chromosomeanalysisrevealsthatthereare88.18±6.79%aneuploidyembryos,and28.70%aneuploidsinpearloystersofone-yearageTheseaneuploidshavefivechromosomalconditions,suchas2n+1(29),2n+2(30),3n-2(40),3n-1(41)and3n+1(43).Resultsofgrowthmeasurementshowthatthereisnosignificantdifferencebetweenaneuploids(asagroup)anddiploidsinbodysizeandweight(p>0.10),buttheaneuploideisobviouslydifferentfromtriploid(p<0.01).Themeanbodysizeandweightofaneuploidsindiploidcondition(2n±1and2n±2)aresignificantlysmallerthanthoseofdiploids(p<0.01),butaneuploidswithintriploidcondition(3n±1and3n±2)arenotsmallerthandiploidsinbodysizeandweight(p>0.1).ThisstudyindicatesPinctadamartensiiDunkercouldtolerateaneuploidyby7~14%ofthehaploidgenome,andthataneuploidsofthisspeciesareviableundercertainconditions.
简介:被动控制系统的各种各样的类型被用来在最近的年里压制结构的地震反应。在这些系统之中,调节了液体列Dampers(TLCD)由在容器联合液体团的运动的效果浪费输入地震体力,液体上的恢复力量由于严肃负担并且通过孔由于液体运动抑制。在这研究,象频率内容和土壤那样的地震刺激特征的效果用非线性的时间历史分析在TLCD的地震表演上调节reinvestigated。在这方面在伊朗的过去的地震地面运动记录之中,有不同参数的16个记录被选择。在开发的结构的模型,依附的TLCD作为一个调节的团被模仿更潮湿(TMD)有一样的颤动时期并且作为原来的TLCD抑制比率。数字结果证明地震刺激特征经常在排水量减小能力上有一个实质的角色液晶显示器和他们应该在TLCD的设计因此被考虑。
简介:CloudresolvingWeatherResearchandForecasting(WRF)modelsimulationsareusedtoinvestigatetropicalcyclone(TC)genesisefficiencyinanenvironmentwithanearbottomvortex(EBV)andanenvironmentwithamid-levelvortex(EMV).Sensitivityexperimentsshowthatthegenesistimingdependsgreatlyoninitialvorticityverticalprofiles.Thelargertheinitialcolumnintegratedabsolutevorticity,thegreaterthegenesisefficiencyis.Giventhesamecolumnintegratedabsolutevorticity,abottomvortexhashighergenesisefficiencythanamid-levelvortex.Acommonfeatureamongtheseexperimentsistheformationofamid-levelvorticitymaximumpriortoTCgenesisirrespectivewheretheinitialvorticitymaximumlocates.BoththeEMVandEBVscenariossharethefollowingdevelopmentcharacteristics:1)atransitionfromnon-organizedcumulus-scale(~5km)convectivecellsintoanorganizedmeso-vortex-scale(~50to100km)systemthroughupscalecascadeprocesses,2)theestablishmentofanearlysaturatedaircolumnpriortoarapiddropofthecentralminimumpressure,and3)amultipleconvective-stratiformphasetransition.Agenesisefficiencyindex(GEI)isformulatedthatincludesthefollowingfactors:initialcolumnintegratedabsolutevorticity,vorticityattopoftheboundarylayerandverticallyintegratedrelativehumidity.ThecalculatedGEIreflectswellthesimulatedgenesisefficiencyandthusmaybeusedtoestimatehowfastatropicaldisturbancedevelopsintoaTC.
简介:由在20052007的春天和秋天期间从30架班机在诺思中国上分析在空中的观察,在在诺思中国的各种各样的地点的0.3%过度饱和的喷雾器和云冷凝作用原子核(CCN)的垂直分布的特征被调查。测量采样在象平原,高原,和海那样的不同表面上被进行。结果证明累积模式喷雾器的数字集中比在春天在秋天是更大的,但是颠倒为CCN是真的。这意味着有比100nm小的直径的更多的喷雾器能在春天作为CCN被激活,并且这能导致更高的喷雾器激活效率。在Taihang山附近的平原上的喷雾器激活效率比在秋天在春天是更大的,并且它比在土地上在海上是更大的。在在Bashang高原上的边界层上面的喷雾器激活效率是很低的。基于一阵喷雾器和CCN的否定指数的垂直分布,象在诺思中国上的喷雾器激活效率一样的喷雾器和CCN的一个空间parameterization模型被建议。因为它被喷雾器和周围的大气的条件的地区性的物理、化学的特征主要影响,结果证明喷雾器激活效率不清楚地依赖于高度。吝啬的喷雾器激活效率分别地是0.66,与在春天和秋天的0.70和0.53的价值。
简介:Plentyofinorganicnitrogeninwastewatercancausetheeutrophicationinwaterbodies,soitisanimportanttasktoremovenitrogen.Purificationrolewasrealizedbyabsorption,filtration,depositon,evaporation,nitrificationanddenitrificationofmicrobes.AlthoughthestudiesofPhragmitesaustrilisbedintheconstructedwetlandarepopular,thepurificationperformancesofconstructedwetlandfilledbysaline-alkalisoilsubstratearelessreported.Inthepaper,thepurificationefficiencyofnitrogenwithPhragmitesaustrilisbedintheconstructedwetlandfilledbysaline-alkalisoilsubstratewasdiscussedthroughasimulationstudy.Resultstodateindicatedthatthefirstorderplugflowmodelwasadequatetodescribethenitrogenremoval.TheexperimentshowedthatthediminishingconcentrationofTN,NO2-N,NO3-N,NH4-Nwerecloselyrelatedtohydrologicalretentiontime(HRT),thecorrelationcoefficientwasRe=0.98499,R2=0.9911,R2=0.89407andR2=0.95459,respectively.Accordingtothedata,themostsuitablehydrologicalretentiontime(HRT)forthiskindofconstructedwetlandshouldbedeterminedto4days.Inaddition,theexperimentshowedthepurificationefficiencyofnitrogenhasverybroadrangeanddrasticvibration,TN(17%-79%),NO2-N(33%-98%),NO3-N(13%-93%),NH4-N(28%-64%).Thestudywillpromotewetland'sdesignandoperationproceduresinlargesaline-alkalinesoilareas.
简介:为系统建模的Cloud-Aerosol-Radiation(汽车)整体最近被造了更好理解云/喷雾器/放射过程并且决定云/喷雾器/放射的不同处理在气候模型引起的无常。汽车系统包括云,喷雾器,和在文学可得到的放射进程的一个大计划集合,包括通常由带GCM的世界使用的那些。在这研究,详细说明了全面精确性的分析,CAR系统的效率被执行。尽管有使用的不同观察,CAR整体工具的全面精确性被发现对短波(SW)和longwave(LW)很好放射计算。与ISCCP(国际卫星云气候学工程)相比为2004年7月拿百分比错误数据在上(60tent和分析o吗??
简介:THESCIENTIFICWATERMANAGEMENTINWINTERWHEATPRODUCTIONANDITSECONOMICBENEFITSINNORTHCHINAAnShunqing(安顺清)andLiuGengshan(刘庚山)Resear...
简介:Theinternalturretmooringsystemforoilproductionstoragevesselsisadevelopingtypeofoffshorefloatingproductionsystemsuitablefordeepwaterandharshenvironmentalapplication.Inthispaper,someachievementsinourresearchworkarepresented.Thedescriptionincludes:dynamicanalysisofmooringsystem,researchonperformanceofturretassembly,influenceofvesseldimensionsandhullformsonmooringperformance,modeltestsundercombinedactionofenvironmentalforcesinbasin,andhullstructuralstrengthanalysis.