简介:PM2.5喷雾器从2009年4月在城市的Chengdu被取样到2010年1月,并且他们的化学作文为元素详细被描绘,浇可溶的无机的离子,和碳的物质。PM2.5的年度一般水准是165gm3,它通常比另外的中国城市里的大小高,建议城市里的严肃的微粒污染问题。水可溶的离子包括元素的碳和器官的碳贡献了43.5%到年度全部的PM2.5集体、碳的喷雾器贡献了32.0%,并且踪迹元素贡献了13.8%。不同每日、季节的变化在PM2.5和它的部件的集体集中被观察,反映不同人为、生来的来源的季节的变化。对中立粒子弱酸被作出对有利的裁决PM2.5。从来源分配分析识别的PM2.5的主要来源包括了煤燃烧,交通用尽,燃烧的生物资源,土壤灰尘,和构造清扫排出物。低硝酸盐:硫酸盐比率建议静止排出物比车辆排出物更重要。铵硫酸盐的重建的群众,铵硝酸盐,微粒碳的物质,和好土壤说明了79%全部的测量PM2.5质量;他们也说明了散布的92%全部的测量粒子。
简介:GABAtransporter1(GAT1)takesimportantrolesinmultiplephysiologicalprocessesthroughtheuptakeandreleaseofGABA,buttheregulationofGAT1geneexpressionindifferenttissuesisrarelyknown.Toaddressthequestion,first,5'RapidamplificationofcDNAend(RACE)wasusedtodetermineGAT1transcriptionalstartingsitesinneonatalmousecerebralcortexandintestine,adultmousebrainandadultrattestis.Theproductsof5'RACEwereconfirmedbyDNAsequencing.WefoundthatthetranscriptofGAT1inneonatalmousecerebralcortexandadultmousebrainstartsatthesamesite(insideofexon1),whileinmouseintestine,GAT1startstranscriptioninintron1,andinrattestis,thetranscriptofGAT1hasanadditionaluntranslationexontothe5'direction.
简介:ThemaintechnicalbackgroundsandrequirementsareintroducedwithregardtoearthquakegroundmotiondesignparametersinseveraldomesticandAmericanstandards,codesandguidesinvolvedintheseismicanalysisanddesignactivitiesofnuclearpowerplantsinChina.Basedontheresearchresultsfromsiteseismicsafetyevaluationofdomesticnuclearpowerplantprojectsinthelastyears,characteristicsanddifferencesofsitespecificdesignspectraareanalyzedincomparisonwithstandardresponsespectra,andthesuitabilityofstandardresponsespectrafordomesticnuclearpowerplantprojectsisdiscussed.
简介:Apotexperimentwasconductedtoinvestigatetheeffectsofvarioussoiltreatmentsonthegrowthofvetivergrass(Vetiveriazizanioides(L.)Nash)withtheobjectiveofformulatingappropriatesoilmediaforuseinsulfide-bearingminedareas.Anacidicminesiteacidsulfatesoil(pH2.8)wastreatedwithdifferentsoilconditionerformulaincludinghydratedlime,redmud(bauxiteresidues),zeoliticrockpowder,biosolidsandacompoundfertilizer.Soilstreatedwithredmudandhydratedlimecorrectedsoilacidityandreducedoreliminatedmetaltoxicityenablingtheestablishmentofvetivergrass.Althoughover-limingaffectedgrowth,someseedlingsofvetiversurvivedtheinitialstrongalkalineconditions.Additionofappropriateamountsofzeoliticrockpowderalsoenhancedgrowth,butover-applicationcauseddetrimentaleffects.Inthisexperiment,soilmediumwiththebestgrowthperformanceofvetiverwas50gofredmud,10goflime,30gofzeoliticrockpowderand30gofbiosolidswith2000gofminesoils(100%survivalratewiththegreatestbiomassandnumberofnewshoots),butaddingachemicalfertilizertothismediaadverselyimpactedplantgrowth.Inaddition,ahighapplicationrateofbiosolidsresultedinpoorergrowthofvetiver,comparedtoamoderateapplicationrate.
简介:Buildingcodeshavewidelyconsideredtheshearwavevelocitytomakeareliablesubsoilseismicclassification,basedontheknowledgeofthemechanicalpropertiesofmaterialdepositsdowntobedrock.Thisapproachhaslimitationsbecausegeophysicaldataareoftenveryexpensivetoobtain.Recently,otheralternativeshavebeenproposedbasedonmeasurementsofbackgroundnoiseandestimationoftheH/Vamplificationcurve.However,theuseofthistechniqueneedsaregulatoryframeworkbeforeitcanbecomearealisticsiteclassificationprocedure.ThispaperproposesanewformulationforcharacterizingdesignsitesinaccordancewiththeAlgerianseismicbuildingcode(RPA99/ver.2003),throughtransferfunctions,byfollowingastochasticapproachcombinedtoastatisticalstudy.Foreachsoiltype,thedeterministiccalculationoftheaveragetransferfunctionisperformedoverawidesampleof1-Dsoilprofiles,wheretheaverageshearwave(S-W)velocity,Vs,insoillayersissimulatedusingrandomfieldtheory.Averagetransferfunctionsarealsousedtocalculateaveragesitefactorsandnormalizedaccelerationresponsespectratohighlighttheamplificationpotentialofeachsitetype,sincefrequencycontentofthetransferfunctionissignificantlysimilartothatoftheH/Vamplificationcurve.ComparisonisdonewiththeRPA99/ver.2003andEurocode8(EC8)designresponsespectra,respectively.Intheabsenceofgeophysicaldata,theproposedclassificationapproachtogetherwithmicro-tremormeasurescanbeusedtowardabettersoilclassification.
简介:Siteengineeringseismicsurveyprovidesbasicdataforseismiceffectanalysis.Asanimportantparameterofsoil,shear-wavevelocityisusuallyobtainedthroughwavevelocitytestinginborehole.Inthispaper,thepassivesourcesurface-wavemethodisintroducedintothesiteengineeringseismicsurveyandpracticallyappliedinanengineeringsiteofShijingshanDistrict.Byrecordingtheubiquitousweakvibrationontheearthsurface,extractthedispersioncurvefromthesurface-wavecomponentsusingtheSPACmethodandobtaintheshear-wavevelocitystructurefrominversion.Overthedepthof42munderground,ittotallyconsistsoffivelayerswithinterfacedepthof3.31,4.50,7.23,17.41,and42.00m;andshear-wavevelocityof144.0,198.3,339.4,744.2,and903.7m/s,respectively.Theinversionresultisusedtoevaluatesiteclassification,determinethemaximumshearmodulusofsoil,providebasisforfurtherseismichazardanalysisandsiteassessmentorsitezoning,etc.Theresultshowsthatthepassivesourcesurface-wavemethodisfeasibleinthesiteengineeringseismicsurveyandcanreplaceboreholes,shortensurveyperiod,andreduceengineeringcosttosomeextent.
简介:叶绿体是从endosymbioticcyanobacteria演变的植物特定的细胞器。他们通过二进制分裂划分。叶绿体部门地点的选择为对称的叶绿体部门是枢轴的。在E。coli,在房间的中点部门地点放被Min系统的动态摆动调整,它包括MinC,头脑和矿。在植物的头脑和矿的相当或相同的事物涉及叶绿体分割。MinC的相当或相同的事物仍然没在更高的植物被识别。然而,象FtsZ一样蛋白质,ARC3,被发现地点放涉及叶绿体分割。这里,我们报导放1的那个叶绿体部门地点(AtCDP1)是在Arabidopsis涉及叶绿体部门地点放置的新奇叶绿体部门蛋白质。AtCDP1被与房间部门显型为殖民地在细菌屏蔽一个ArabidopsiscDNA表示图书馆发现。AtCDP1只在Arabidopsis在年轻绿纸巾被表示。有多重部门地点的伸长的叶绿体在loss-of-functioncdp1异种被观察。AtCDP1的Overexpression也引起了一个叶绿体部门显型。蛋白质相互作用试金建议AtCDP1可以调停通过和ARC3的相互作用放的叶绿体部门地点。总的来说,我们的结果显示AtCDP1是放系统,和这个系统的工作机制的叶绿体部门地点的一个新奇部件与在原核生物的房间的传统的MinCDE系统的不同。
简介:Basedupon3widelyusedbasemodels,atotalof8ADA/GADAsiteindexmodelswerederived.Thedataforthesemodelsinthisstudywereobtainedfrom79pith-splitstemanalysisplotsandtheestimationmethodwas"indicatorvariableapproach".Weusedbothfitstatisticsandvisualanalysistoselectthebest-fitmodel,andattachedmoreimportancetothevisualanalysis.Acomprehensiveapplicationanalysiswasalsogiventotheselectedmodel.Theresultsshowed:1)GADAoutperformedADAwithrespecttopredictions.2)AGADAmodelderivedfromHossfeldⅣpresentedthebestpredictionability.Itwassuggestedthatthemodelbeusedtopredictdominantheightandtoestimatesiteindexforponderosapinestandsranging30-200yearsinBritishColumbia,Canada.3)Thebestsiteindexagewasageof100years,baseduponrelativeerrorsofpredictions.
简介:AccordingtotheChineseGB50011-2001codeandtherecommendedprovisionsofFEMANEHRPandEUROCODE8,byusingshearwavevelocityandboreholedata,thesiteclassificationisevaluatedforatypicalsoftsoilsiteontheYantaiseacoast.Thesiteseismicgroundmotioneffectisanalyzedandtheinfluenceofthecoastalsoilondesigngroundmotionparametersisdiscussed.Theresultsshowthatthebriefsiteclassificationcannotrepresenttherealconditionsofasoftsoilsite;thesoftsoilonthecoasthasaremarkableimpactonthemagnitudeandspectrumofgroundmotionacceleration.Themagnificationonpeakaccelerationisbigger,however,duetothenonlineardeformationofthesoil.Themagnificationisreducednonlinearlywiththeincreaseofinputgroundmotion;thespectrumisbroadenedandthecharacteristicperiodelongatedonthesoftsoilsite.
简介:一个一般神经网络基于代替结构的computationally集中的地点特定的地震分析的潜力在这份报纸被建议了的方法论。方法论的基本框架由组成一feed有一隐藏的层的神经网络算法完成代表一个区域和土壤扩大的地震潜力的前面的背繁殖。方法论在印度与相应于德里城市的参数被实现并且验证。为这个目的,充分的理由运动由于考虑从喜玛拉雅的带的中央地震差距发源用的地震在德里为一个选择地点在基岩水平被产生必要象geotechnical数据一样地质。表面水平地面运动和相应地点特定的反应系列被使用一个一个维的相等的线性波浪繁殖模型获得。光谱加速值被看作一个目标参数验证方法论的性能。执行验证建议方法论的数字研究证明错误在预言光谱加速价值在为设计目的可接受的限制以内。方法论在它能被用于另外的地震地脆弱的区域并且能被包括取决于的更多的参数也更新的意义是一般的在这个题目最先进。
简介:Thispaperpresentsastep-by-stepprocedureusingthethree-dimensionalboundaryelementapproachtostudythebehaviorofsemi-circularcanyonsunderseismicshearwaves.TheboundaryelementcodeTDASCallowsutilizationforvariouscanyongeometries,evaluationofconcurrentseismicwavesandcalculationofthegroundmotionsoncanyonsduetoanexcitationatanyarbitrarypointoftheincidentfield.Consideringthewideningratioofthecanyon(includingprismatic,semi-prismaticandnon-prismaticcanyons),wavecharacteristics(wavelength,dimensionlessperiod,direction)andmaximumamplificationpattern,thesolutionwasappliedtocarryoutaseriesofparametricstudies.Itwasshownthatcanyonformcansignificantlyaffectthedisplacementamplification,especiallyatthepointslocatedonitsedges.Byincreasingthewavedimensionlessfrequency(η>1),theamplificationpatternbecomesmorecomplex.Onthebasisoftheresultsfromavarietyofconsideredcases,anewexpressionhasbeenpresentedforthelimitingwavelengthbeyondwhichthewideningofthecanyonwillnothaveamajoreffectonthedisplacementamplification.Toverifythereliabilityoftheproposedapproach,theobtainedresults,expressedintermsofdisplacementamplitude,werecomparedwiththosefromtheavailablepublishedliteratureandareasonablygoodagreementwasobserved.
简介:在植物昆虫相互作用的偏爱表演关系是在进化生态学的一个中央主题。在许多昆虫之中,鸡蛋是脆弱的,幼虫限制了活动性,使一个适当oviposition地点的选择成为为女性的最重要的决定之一。我们由人工地为2个自然资源,葡萄和植物的一种为偏爱选择在果蝇melanogasterMeigen和果蝇simulansSturtevant调查了oviposition偏爱的进化。我们的学习的主要发现是D的微分回答。melanogaster和D。simulans。尽管偏爱在D的试验性的人口演变。melanogaster,回答不与政体使用了的选择一致。相反,在D的回答。simulans与期望一致,证明这种有为特点的可选的基因变化。而且,在D之间交叉。simulans分叉的线证明涉及葡萄偏爱的基因因素看起来大部分后退。在摘要,我们的人工的选择学习建议那D。melanogaster和D。simulans为这个特点拥有不同基因体系结构。
简介:AccordingtotherelationshipbetweenToonasinensisRoemstandvolume,productivityandforestage,siteconditions,standdensityandotherfactors,throughselecting8representativecitiesorcounties,usingstandardinvestigationandstemanalysismethod,thispapermakesrelativelysystematicresearchabouttheToonasinensisRoemplantationaccumulation,productivity,andtherelationshipbetweenthemandsiteconditions.Throughcomparativeanalysisindicatorsofmultiplesiteconditions,thispaperexpectstogiveamorecomprehensivepictureaboutthesourceofaccumulationandproductivitydifference.
简介:在过去的十年,为详细地震microzonation研究的必要性全球被认出。因此,不同途径被建立并且适用。不幸地,这些途径的多数不基于先存在是领域数据,但是要求广泛的地震大小和调查。而且,这些途径不充分地合并非线性并且不能考虑地下水水平变化。为这个目的,尤其是数字的模型是很合适的。这些模型要求本地地质的条件的好知识(特别最高unconsolidated单位),这些单位的geotechnical参数的信息,和hydrogeological调查区域当模特儿。大多数这个信息能从已经在最浓密地占据的区域被执行了的geotechnical调查和调查被获得。在为布加勒斯特城市的案例研究,非线性的分析用基于visco发育不全的组成的法律的软件被执行。结果显示地下水水平变化在地面反应并且这样的持续时间和振幅上有重要影响应该为地震microzonation研究被考虑。这条途径能被用来显示地点效果并且识别考虑不同地震大小和地下水层次的不同microzones。
简介:Present-dayNingbo宁波inZhejiang浙江ProvincewascalledMingzhou明州intheTangandSongperiods.Itwasafamouscommercialportalongthesoutheasterncoastalarea,andwasrankedasoneofthetopfourportsincludingJiaozhou交州,Guangzhou广州,andYangzhou扬州intheTangDynasty.InthefirstyearofChangqing长安reignperiodoftheTang(AD821),MingzhouCitywasbuiltinthecenterofpresent-dayNingboCity.