简介：在最近的年里，几个研究组为对存在大楼的地震反应评价学习了分析方法的新一代。不过，许多重要开发仍然被需要以便定义更多的可靠、有效的评价过程。而且关于存在大楼，由于低知识水平，线性有弹性的分析是允许的唯一的分析方法，这应该被加亮。一样的代码(例如NTC2008，EC8)为地震需求的评估与行为因素把线性动态分析看作参考方法。这类分析基于一个线性橡皮的结构的模型题目到一个设计系列，由通过一个行为因素减少有弹性的光谱获得了。行为因素(在一些代码的减小因素或q因素)被用来减少从线性分析获得以便考虑非线性的结构的能力的有弹性的光谱纵标或力量。行为因素应该基于几个参数被定义，例如机械材料特征，结构的系统，不规则和设计过程影响地震非线性的能力。在实际应用程序，仍然有详细规则和为存在大楼足够的精确行为因素价值的明显的缺乏。在这个工作，造类型的主要存在RC-MRF的地震能力的一些调查被执行了。为了做地震力量的正确评估，要求，与力量协调的实际行为因素价值基于地震安全评价过程被建议了并且在意大利的地震代码与价值相比报导了，NTC08。

简介：Therearemanyfactorsaffectingtheinstabilityofthesubmarinehydrate-bearingslope(SHBS),andtheinteractionwithhydrateisverycomplicated.Inthispaper,themechanicalmechanismofthestaticliquefactionandinstabilityofsubmarineslopecausedbythedissociationofnaturalgashydrate(NGH)resultingintherapidincreaseofporepressureofgashydrate-bearingsediments(GHBS)andthedecreaseofeffectivestressareanalyzedbasedonthetimeseriesandtypeofSHBS.Then,takingthetypicalsubmarineslopeinthenorthernSouthChinaSeaasanexample,fourimportantfactorsaffectingthestabilityofSHBSareselected,suchasthedegreeofhydratedissociation,thedepthofhydrateburial,thethicknessofhydrate,andthedepthofseawater.Accordingtotheprincipleoforthogonalmethod,25orthogonaltestschemeswith4factorsand5levelsaredesignedandthesafetyfactorsofsubmarineslopestabilityofeachschemearecalculatedbyusingthestrengthreductionfiniteelementmethod.Bymeansoftheorthogonaldesignrangeanalysisandthevarianceanalysis,sensitivityofinfluentialfactorsonstabilityofSHBSareobtained.Theresultsshowthatthedegreeofhydratedissociationisthemostsensitive,followedbyhydrateburialdepth,thethicknessofhydrateandthedepthofseawater.Finally,theconceptofgashydratecriticalburialdepthisputforwardaccordingtotheinfluencelawofgashydrateburialdepth,andthenumericalsimulationforspecificsubmarineslopeiscarriedout,whichindicatestheexistenceofcriticalburialdepth.

简介：有由于季风系统的复杂性在中国预言植被回答到东方亚洲季风(电动会计记帐机)可变性的简单方法的缺乏。在这研究，我们发现了变化西方的和平的副热带的高度(WPSH)是EAM的主要部件之一，在中国在植被生长上有深刻影响。当WPSH更被定位到它的气候一般水准的西方时，东方、西北的部分分别地由0.3%-2.2%，和0.2%-2.2%经历增加的每年一般水准的规范的差别植被索引(NDVI)和粗野主要生产率(GPP)。相反，当WPSH更被定位到它的气候的东方时，平均，上述区域分别地在0.4%～1.6%，和1.3%～4.5%经历减少的每年一般水准的NDVI和GPP。WPSH用作一个主要发行量索引预言植被的反应到季风。

简介：TheanalysisofavailableNdisotopedatafromtheTanzaniaCratonplacesimportantconstraintsonthecrest-mantleseparationages,andeventsmarkingjuvenilecrustaladditionandcrustalrecycling.Ndmodelagesdatetheoldestcrustextractionto3.16GaintheTanzaniaCraton,althougharockrecordofsuchantiquityisyettobefoundthere.Themostsignificantperiodofjuvenilecrustaladditionaswellascrustalrecyclingis2.7-2.6Ga.TheNdisotopesofmariesamplesshowthatchemicalheterogeneityexistedinthemantlebeneaththeTanzaniaCraton,withsomesamplesoriginatingfromsignificantlydepletedmantle,andmostsamplesoriginatingfromthemixtureofprimitivemantleanddepletedmantle.TheNdisotopesectionrevealssignificantdifferencesinNdisotopesbetweenthenortheratonandcentralcraton;comparedtothenorthcraton,thecentralcratonyieldsaNdmodelagethatisapproximately100Maolder,anditsεNd(t)valuesaremorenegative,indicatingthatthetwopartsofthecratonhavedifferentmantlesourceregions.DifferenttypesofgranitoidsaredistributedintheTanzaniaCraton,suchashigh-Kandlow-Algranite,ealc-alkalinegranite,peraluminousgraniteandtransitionaltypesoftonalite-trondhjemite-granodiorites(TTGs).Mostofthegranitoidsformedlaterthanthemarierocksinsyn-collisionandpostcollisionevents.

简介：Inthisstudy,familiesofselectedpopulationforgrowth(SP_BWT),selectedpopulationforwhitespotsyndromevirus(WSSV)resistance(SP_RW),Bohaiwildpopulation(WP_BH)andHuanghaiwildpopulation(WP_HH)ofF.chinensiswereconstructedthroughartificialinseminationandwiththestandardizedprocedureoflarvaerearing.Growthandsurvivalperformancewerestudiedamongfourpopulationsaftera70dayscommontest.Theresultsshowedthatthemaximumleastsquaremeanofbodyweightwas17.50ginSP_BWTwhiletheminimumwas13.03ginWP_HH.ComparedwithWP_BH,bodyweightofSP_BWTincreasedby23.41%(P<0.01)andthatofSP_RWby12.20%(P>0.05).BodyweightsofSP_BWTandSP_RWweresignificantlyhigherthanthatofWP_HH,whichincreasedby34.31%(P<0.01)and22.10%(P<0.05),respectively.ThemeanAGRoffourpopulationswas0.19,0.18,0.17and0.16gd-1,respectively.Coefficientofvariationofbodyweightamongfourpopulationswashigh,whichrangedfrom32.67%to35.25%.Sucharangeshowedthattherewasthepotentialityforfurtherimprovementinselectedpopulations.Coefficientofvariationofsurvivalrateamongfourpopulationswaslow,varyingbetween3.20%and5.90%.Thedifferenceofsurvivalwashighlysignificant(P<0.01)betweenSP_BWTandWP_BH,andsignificant(P<0.05)betweenSP_RWandWP_BH.However,nosignificantdifferenceamongotherpopulations(P>0.05)wasobserved.Differentgrowthperformanceswerealsoobservedamongdifferentfamiliesineachpopulation.Thebodyweightof798Ffamilywasthehighest.Theabsolutegrowthrate(AGR)was0.25gd-1,150%higherthanthatofthelowestone,0.1gd-1in807Ffamily.Survivalrateoffamiliesamongfourpopulationswasdifferent.Thehighestwas94.74%,andthelowestwas71.88%.

简介：Thisstudywasconductedtoevaluatetheeffectsofplant/animal(P/A)proteinratios(viz.1∶4,1∶3,1∶2,1∶1,2∶1,3∶1,4∶1)ongrowthperformance,bodycomposition,apparentdigestibilityofdiets,andnonspecificimmunityofjuvenileseacucumber(Apostichopusjaponicus).Seacucumbersweredividedinto21plastictanks,andeachtankwasstockedwith15individuals(initialweight:about23.73g).Eachfeedwasallocatedtothreereplicatesofseacucumbers.Thefeedingexperimentlastedfor50days.Resultsindicatedthatweightgainrate(WGR)andbodywallweight(BWW)significantlyincreasedasdietaryratioofP/Aincreasedfrom1∶4to3∶1,andthendecreasedsignificantlywithfurtherincreaseofthisratio(P<0.05).Thebodywallcoefficient(BWC)showedasimilartendencytoWGRandBWW,butnosignificancewasdetectedamongdietarytreatments(P>0.05).Theapparentdigestibilityofdrymatter,proteinandlipidincreasedwithratioofP/Aincreasingfrom1∶14to2∶1(P<0.05),andthendecreasedwithfurtherincreaseofthisratio.Correspondingly,activitiesoftrypsinandamylaseweresignificantlyincreasedasP/Aincreasedfrom1∶4to2∶1(P<0.05).TheactivitiesofSODandCATshowedasimilartrendwithWGR,withthehighestvalueobservedintheratioof1∶2and1∶1,respectively.ResultsaboveshowedthatmoderateorrelativelyhigherratioofP/Aprotein(1∶1-3∶1)significantlyincreasedthegrowthperformance,apparentdigestibility,andnonspecificimmunityofseacucumber.Thiswillcontributetoimprovingthefeedformulationforjuvenilecucumbers.

简介：TheeffectsofBacillussubtilis2-1fromtheintestineofhealthyseacucumberonthegrowth,digestiveenzymeactivitiesandintestinalmicrobiotaofjuvenileseacucumber(Apostichopusjaponicus)weredeterminedinthepresentstudy.SeacucumberwasfedwithSargassumthunbergiipowdersupplementedwithB.subtilis2-1atdifferentconcentrationsvaryingamong0(control),105,107,and109CFUg-1for8weeks.ResultsshowedthatthegrowthperformanceandintestinalamylaseandtrypsinactivitiesweresignificantlyincreasedbydietaryB.subtilis2-1at109CFUg?1(P<0.05).However,dietaryB.subtilis2-1hadnosignificantinfluenceonthelipaseactivityinseacucumber(P>0.05).Thepolymerasechainreactiondenaturinggradientgelelectrophoresisand16SrRNAgenesequencinganalysisindicatedthatdietaryB.subtilis2-1at105and107CFUg-1inhibitedmostoftheProteobacteriaincludingthoseingenusVibrio.DietaryB.subtilis2-1at109CFUg-1notonlydecreasedtheabundanceandspeciesofgenusVibrio,butalsoincreasedtheintensityofgeneraPsychrobacterandBacillus.AspecificdosageofdietaryB.subtilis2-1couldincreasethegrowthandmodulatetheintestinalmicrobiotaofseacucumber;thusitmightbeanovelprobioticforkeepingthehealthofseacucumber.