学科分类
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17 个结果
  • 简介:<正>Atthe2011NationalFinancialWorkConference,itwasclearlypointedoutthatfinanceshouldcontinuetoservetherealeconomyandthatcapitalshouldbeensuredtobeinputtedintotherealeconomyinabidtoeffectivelysolvetheproblemsthatitwasdifficultandexpensivetofinance

  • 标签: BANKS LOANS TRANSFORMATION CREDIT FINANCE expensiv
  • 简介:I'mverypleasedtobehereatthissidemeeting,China'sGreenTransformation:Efforts,PracticesandFuture,co-sponsoredbyACCA21andUNDP.SincetheUNConferenceonEnvironmentandDevelopmentin1992,peoplearoundtheworldhavemadenumerous

  • 标签: 中国 可持续发展 绿色经济 联合国 环境
  • 简介:泥土矿物质捱过是到植物的营养素的来源。Palygorskite是通常发生在干旱区域的土壤和沉积的一种Mg富有的含纤维的泥土矿物质。尽管许多研究检验了为palygorskite的形成和稳定性要求的环境条件,在根地区的这种矿物质的转变的信息(或根围)农业庄稼被限制。这研究在小麦和燕麦的根围探索了palygorskite转变的可能性并且比较了这些庄稼的能力从palygorskite提取结构的Mg。庄稼在从Hamadan区域,伊朗和佛罗里达palygorskite由沙的混合物组成的壶被栽培,与提取的水灌溉了,并且与完全或Mg免费的滋养的答案对待。在100d以后,由庄稼的Mg举起被测量。在每个壶的泥土大小的粒子也与沙被分开并且通过X光检查衍射(XRD)被分析。粒子的X光检查模式与纯palygorskite粒子的相比(在耕作前)。结果证明palygorskite能在与Mg免费的滋养的答案供应的壶为小麦的生长提供足够的Mg。尽管有由从palygorskite结构的两植物的镁举起,显示palygorskite的转变的可检测的山峰都没被XRD认出。在山峰紧张的1.05nm的减少为包含palygorskite的壶是更明显的并且比为与完全的滋养的答案灌溉的壶与Mg免费的滋养的答案灌溉了。尽管在山峰紧张的减少比小麦为燕麦是更大的,显示由燕麦捱过的更大的palygorskite,由燕麦的Mg举起是低的由观察的缺乏症状证实了。

  • 标签: 转化能力 坡缕石 吸收率 燕麦 小麦
  • 简介:一个组成的模型为转变,重取向和形状记忆合金(SMA)的塑料变丑被开发。它基于SMA是由奥氏体和马氏体组成的混合物的概念,每个阶段的体积部分与使用的热机械的装载的变化是可变形的,并且SMA的组成的行为是它的二个阶段的单个行为的联合。马氏体的变丑被分开成橡皮,热,重取向和塑料部分,和奥氏体的被分开成有弹性、热、塑料的部分。使用田中的转变规则由考虑塑料变丑的效果修改了,SMA的组成的模型被获得。ferroelasticity,SMAAu-47.5at.%Cd的pseudoelasticity和形状记忆效果,和pseudoelasticity和形状记忆象塑料一样完成变丑和它NiTiSMA的效果,被分析并且与试验性的结果相比。

  • 标签: NITI形状记忆合金 塑性变形 本构模型 调整 改造 形状记忆效应
  • 简介:Thispaperextendsapredictionmodelformulti-directionalrandomwavetransformationbasedonanenergybalanceequationbyMasewiththeconsiderationofwaveshoaling,refraction,diffraction,reflectionandbreaking.Thisnumericalmodelisimprovedby1)introducingWen'sfrequencyspectrumandMitsuyasu'sdirectionalfunction,whicharemoresuitabletothecoastalareaofChina;2)consideringenergydissipationcausedbybottomfriction,whichensuresmoreaccurateresultsforlarge-scaleandshallowwaterareas;3)takingintoaccountanon-lineardispersionrelation.PredictionsusingtheextendedwavemodelarecarriedouttostudythefeasibilityofconstructingtheAiHuayachtportinQingdao,China,withacomparisonbetweentwoportlayoutsindesign.Wavefieldsinsidetheportfordifferentincidentwavedirections,waterlevelsandreturnperiodsaresimulated,andthentwokindsofparametersarecalculatedtoevaluatethewaveconditionsforthetwolayouts.AnalysesshowthatLayoutIisbetterthanLayoutII.Calculationresultsalsoshowthattheharborwillbecalmfordifferentwavedirectionsunderthedesignwaterlevel.Onthecontrary,thewaveconditionsdonotwhollymeettherequirementsofayachtportforshipberthingundertheextremewaterlevel.Forsafetyconsideration,theelevationofthebreakwatermightneedtobeproperlyincreasedtopreventwaveovertoppingundersuchwaterlevel.Theextendednumericalsimulationmodelmayprovideaneffectiveapproachtocomputingwaveheightsinaharbor.

  • 标签: 数值模拟模型 波浪变形 游艇码头 随机 多向 设计水位
  • 简介:Alloyingelements,suchassiliconandmanganese,haveamajorimpactonthephasetransformationpointofsteel.Specifically,manganeseisanelementfortheexpansionandstabilityoftheausteniteregion,whilesiliconcanexpandandstabilizetheferriteregion.Phasetransformationoccursduringthehotrollingprocessforthesteelwithcertainsiliconcontent,whichleadstogreatchangesofthedeformationresistance,therebyaffectingtherollingstability.Consequently,abetterunderstandingofphasetransformationintherollingprocesswillcontributetotheenhancementofproductquality.Inthispaper,theon-linerollingdatawereprocessedbymeansoftheinversecalculationmethod.Inthismethod,thesteeldeformationresistancewithvarioussiliconandmanganesecontentswasobtainedandanalyzedtodeterminethedeformationbehaviorofthesteel,whichcanhelpimprovetheon-linecontrolmodelandenhancethesteelquality.

  • 标签: 低碳钢 滚动式 变形过程 轧制稳定性 温度 合金元素
  • 简介:Semiparametrictransformationmodelsprovideaclassofflexiblemodelsforregressionanalysisoffailuretimedata.Severalauthorshavediscussedthemunderdifferentsituationswhencovariatesaretimeindependent(Chenetal.,2002;Chengetal.,1995;Fineetal.,1998).Inthispaper,weconsiderfittingthesemodelstoright-censoreddatawhencovariatesaretime-dependentlongitudinalvariablesand,furthermore,maysuffermeasurementerrors.Forestimation,weinvestigatethemaximumlikelihoodapproach,andanEMalgorithmisdeveloped.Simulationresultsshowthattheproposedmethodisappropriateforpracticalapplication,andanillustrativeexampleisprovided.

  • 标签: 故障时间 测量误差 协变量 联合建模 纵向数据 模型数据
  • 简介:Aseriesoftestsofdeformation-inducedferritetransformation(DIFT)inalowcarbonsteelwerecarriedoutbytheGleeble-3500hotsimulationmachineatatemperaturerangeofAe3-Ar3.Theoverallstress-straincurvesduringDIFTcanbedividedintothreetypicaltypes:'double-humped','single-humped'and'transitional'.Thepeaksexhibitedinthecurveareinvolvedwithdeformation-inducedtransformationwhichhappenedingrainsoratthegrainboundaries.Accordingtothestress-timecurveandstrain-timecurve,straincapacitydramaticallypostponedthestrain-inducedtransformation,whichleadstothestartofthetransformationrightaheadofthefinishofdeformationandthemajorityoftheferritetransformationprocessmainlyhappenedafterthedeformation.Deformation-inducedtransformationisametadynamictransformationprocesswithdynamicnucleation.

  • 标签: 变形诱导铁素体相变 应力应变曲线 低碳钢 形变诱导相变 应变诱导相变 时间曲线
  • 简介:Thecalcareousfluvo-aquicsoilwascollectedandamicrocosmstudywascarriedoutwithroot-matandfrozenslicingmethodinlaboratory.ThepHintheroot-soilinterfacewiththecontroltreatmentwasjustslightlylowerthaninthebulksoil.However,theadditionofNH4--NsignificantlydecreasedthepHvalueintheroot-soilinterfaceandtheadditionofNo3-NslightlyincreasedthepHvalueintheroot-soilinterface.ThemagnitudeofpHchangesintheroot-soilinterfacedependedupontheconcentrationsofthenitrogensourcesadded.ThecontentsofCa2-P,Fe-PandAl-Pintheroot-soilinterfaceweremuchloweraftertreatedwithNH4-NandslightlyhigheraftertreatedwithNo3-Ncomparedwithcontroltreatment.Aftertreatedwith100,200and400mg·kg-1NH4+-N,thedeficiencyratesofCa2-Pinthearea0-1mmfromtherootplanewere37.1%,45.9%and57.7%,respectively,thedeficiencyratesofFe-Pwere23.4%,29.1%and38.2%,respectively,andthedeficiencyratesofAl-Pwere25.1%,28.0%and33.2%,respectively.ComparedwiththecontrolthedeficiencyratesofCa8-PinNH4+-NandNo3-Ntreatmentsdecreasedandincreased,respectively,butthedifferenceswerenotobvious.ThecontentsofCa10-PandO-Pintheroot-soilinterfacedidnotsignificantlychangeaftertreatedwithNH4+-NorNo3-N,suggestingthatCa10-PandO-PwereremarkablydifficulttobemobilizedevenatthepresenceofhighconcentrationofNH4+-N.TheloweredpHintheroot-soilinterfaceinducedbytheadditionoftheNH4-Npromotedthetransformationofphosphatesintheroot-soilinterface,enhancedthemobilizationandbioavailabilityofphosphates,andtherebyremarkablyincreasedtheabsorptionofphosphorusbyroots.

  • 标签: AMMONIUM nitrate root-soil interface inorganic phosphorus
  • 简介:两个都与高chemoselectivity介绍芳香、脂肪族的主要的氨基的组的一个一步舞过程被开发。三位字节州的丙酮从聚合电影底层的C-H契约和是积木和氨基的组搬运人的酚的O-H契约提炼氢原子。作为结果,二种自由激进分子,聚合物底层的限制的以碳为中心的链激进分子和活动以氧为中心的含苯氧基的激进分子,被产生。然后,公司契约被在这些二种自由激进分子之间的联合反应形成。p-Tyramine和p-aminophenol被用作氨基的搬运人。氨基的组的成功的介绍被水合同角度(CA)的大小表明到LDPE,BOPP和宠物电影底层上,紫外系列(紫外),X光检查光电子光谱学(XPS)并且荧光灯显微镜学。处理因素p-tyramine和p-aminophenol的集中,和丙酮/水的比率例如紫外光的紧张和照耀时间,被调查。优化进程参数如下:紫外轻紧张9500W/cm2;为BOPP和LDPE的照耀时间18min,为宠物的22min;丙酮/水=的比率1;并且p-tyramine和p-aminophenol的集中15%为BOPP和LDPE,1%为宠物。基于紫外吸收度,聚合底层上的氨基的组被估计在6.3浥汵楳湯瀠汯浹牥穩瑡潩獮眠瑩?慣楴湯捩?湡潩楮?档牡敧?湩的范围吗?

  • 标签: 氨基酸组成 聚合物薄膜 苯酚衍生物 光诱导 苯氧自由基 X射线光电子能谱