简介：性质awc1被许多作者使用由弱Chebyshevsubspaces的元素有关近似获得结果。在这份报纸，作者在细节学习这个性质，由收集有关它并且由发现新的散布结果。

简介：Hydrotalcitecanactasaco-stabilizerwithothermainstabilizerforpoly(vinylchloride)(PVC).ThethermalstabilityandfluidpropertyofPVCfilledwithhydrotalcitesurface-treatedwithtitanateandsilanewerestudiedinthiswork.OrganicSnisamainstabilizerandhydrotalciteisastabilizingassistant.ThestabilityofthePVCresinmixedwithorganicSnandhydrotalciteisbetterthanthatofthePVCresinmixedwithorganicSnalone.ItisshownthatthePVCresinfilledwithhydrotalcitepossessesabetterstaticanddynamicheatstability.Moreover,hydrotalcitecanimprovethefluidpropertyofPVC,whichisadvantageoustotheprocessingofPVC,andtheoptimumcontentofhydrotalciteisabout1%-2%(massfraction).

简介：Inthispaper,thenotionoftheboundedcompactapproximationproperty(BCAP)ofapair[Banachspaceanditssubspace]isusedtoprovethatifXisaclosedsubspaceofL∞withtheBCAP,thenL∞/XhastheBCAP.WealsoshowthatX*hastheλ-BCAPwithconjugateoperatorsifandonlyifthepair(X,Y)hastheλ-BCAPforeachfinitecodimensionalsubspaceY∈X.LetMbeaclosedsubspaceofXsuchthatM⊥iscomplementedinX*.IfXhasthe(bounded)approximationpropertyoforderp,thenMhasthe(bounded)approximationpropertyoforderp.

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简介：Inmagneticfusionresearch,twosortsofaxi-symmetrictoroidalequilibriumconfigurationaremostlyinterested.Oneistheconventionaltokamakthathasanaspectratio2.8

简介：Inthispaperwe’llproveafundameutalpropertyofthevectorspacebymeansoftheex-tensionfield,i.e.thenumbersoftheelementsofabasisofthevectorspaceVoverthefieldFequaltothedimensions(V:F).

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简介：Bistaticforward-lookingsyntheticapertureradar(SAR)hasmanyadvantagesandapplicationsowingtoitstwodimensionalimagingcapability.Therecouldbevariousimagingconfigurationsbecauseofthegeometricflexibilityofbistaticplatforms,resultinginkindsofmodelsbuiltindependentlyamongwhichtherecouldbesomesimilareventhesamemotionfeatures.Comprehensiveresearchonsuchsystemsinamorecomprehensiveandgeneralpointofviewisrequiredtoaddresstheirdifferenceandconsistency.PropertyanalysisofbistaticforwardlookingSARwitharbitrarygeometryisachievedincludingstripmapandspotlightmodesonairborneplatform,missile-borneplatform,andhybridplatformofboth.Emphasisisplacedonazimuthspacevarianceofsomekeyparameterssignificantlyaffectingthesubsequentimagingprocessing,basedonwhichthefrequencyspectraarefurtherdescribedandcomparedconsideringrespectivefeaturesofdifferentplatformsforfrequencyimagingalgorithmdeveloping.Simulationresultsconfirmtheeffectivenessandcorrectnessofouranalysis.

简介：Thegoalofthispaperwastorevealthefeasibilityofchloromethylationofpolymersmadefromtechnicaldivinylbenzenesoastointroducefunctionalgroupsintopolymericadsorbents.Forthisstudy,thefactorsthateffectthechloromethylationreaction,suchastheporestructureofthepolymer,theratioofthereactantstocatalyst,thereactiontemperatureandreactiontimeandsoonwereinvestigated,andtheporestructureandpropertyofthechloromethylatedpolymerswerestudiedTheresultsshowedthatpolymersoftechnicaldivinylbenzenecouldbechloromethylatedsuccessfully,andtheadsorptivepropertyofthechloromethylatedresinwasdifferentfromthatoftheinitialresin.

简介：ItisshownthatthereexistsaJ-convexsubsetCofacomplexHilbertspaceX,suchthattheJ-couvexhullofthesetofallJensenboundarypointsofCisdifferentfromC.

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简介：一半房间潜力(HCP)；与氯化钠做的增强的具体标本的腐蚀电流在电气化学的氯化物抽取(ECE)以后被决定。试验性的结果证明当ECE处理被移开时，HCP变得更否定；腐蚀电流在ECE处理前与那些相比变得更大，然后，HCP断然变；腐蚀电流与时间减少。在30天ECE处理以后，标本在暴露的钢附近由于足够的氧的存在转到大约100mV的cored的HCP锁，要不是核心un的标本，更长的时间，大约二个月，是被订。在在ECE处理以后的一样的标本的不同的层的非同类的HCP分发可能导致钢的第二等的腐蚀。

简介：<正>Inthisresearchwork,threekindsofactivatedbentoniteusedassolidacidcatalystshadbeensynthesizedandstudiedonremovalofolefinsfromthereformateoil.ActivatedbentonitesampleswereanalyzedusingtheBETandpyridine-FTIRmeasurementstoinvestigatetheirphysicalandchemicalproperties.Theresultsshowedthatbothtexturalpropertiesandsurfaceacidityofthebentonitecouldaffectthecatalyticactivity.Amongthecatalystsamples,onekindofbentonitepurchasedfromHubeiwithhighsurfacearea,highporevolumeandmoreacidsitesrevealedhighactivityinremovingolefinsfromthereformate.

简介：Giventheexistenceoftransactioncosts,thelocationofpropertyrightsisanimportantfactorindeterminingtheincentivesforefficientlevelsofinvestmentatvariouslevelsoftheindustry.Thispaperappliessomeoftheeconomictheoriesofpropertyrightsandindustrialstructuretotheissuesconcerningtheconservationofbiodiversity.AlthoughtheexpansionofIntellectualPropertyRights(IPR)systemsintotheareaofgeneticresourceshasincreasedprivateinvestmentinR&Dprocessoftheagriculture,itdoesnotgenerateenoughincentivesforinsituconservationofbiodiversity.Tosolvethiseconomicinefficiency,farmers’rightsandotherdesignofincentivesandinstitutionalarrangementshouldbereconsidered.

简介：ＥＸＰＥＲＩＭＥＮＴＡＬＲＥＳＥＡＲＣＨＯＦＥＬＦＥＭＦＯＮＣＨＡＮＧＥＯＦＨＥＭＯＲＨＥＯＬＯＧＩＣＡＬＰＲＯＰＥＲＴＹＡＮＤＤＥＳＩＧＮＯＦＥＬＦＥＭＦＧＥＮＥＲＡＴＯＲＥＸＰＥＲＩＭＥＮＴＡＬＲＥＳＥＡＲＣＨＯＦＥＬＦＥＭＦＯＮＣＨＡＮＧＥＯＦ...

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简介：让A是unitalAF代数学(简单或非简单)并且让伪是A的自守。假定伪有某些Rokhlin性质，A是伪-简单。也假定有整数J鈮?1以便伪*0J=标志K0(A)。作者证明那A吗？伪？让tracial评价零。关键词Rokhlin性质-Tracial等级零-AF代数学2000苏布杰克特先生分类46L35-46L55工程由国家天赋支持了中国的科学基础(Nos.10771069，10671068)并且上海优先级大学教师学科(没有。B407)。

简介：Ni83Fe17filmswithathicknessofabout100nmweredepositedonthermaloxidizedsiliconsubstratesatambienttemperature,240,350,and410℃byDCmagnetronsputtering.Thedepositionratewasabout0.11nm/s.Theas-depositedfilmswereannealedat450,550,and650℃,respectively,inavacuumlowerthan3x10-3Pafor1h.TheNi83Fe17filmsmainlygrowwithacrystallineorientationof[111]inthedirectionofthefilmgrowth.Withtheannealingtemperatureincreasing,the[111]orientationenhances.Forfilmsdepositedatallfourdifferenttemperatures,thesignificantimprovementonanisotropicmagnetoresistanceoccursattheannealingtemperaturehigherthan550℃.Butforfilmsdepositedatambienttemperaturesand240℃,theanisotropicmagnetoresistancecanonlyrisetoabout1%after650℃annealing.Forfilmsdepositedat350℃and410℃,theanisotropicmagnetoresistancerisestoabout3.8%after650℃annealing.Theatomicforcemicroscopy(AFM)observationshowsasignificantincreaseingrainsizeofthefilmdepositedat350℃atter650℃annealing.Thedecreaseinresistivityandtheincreaseinanisotropicmagnetoresistancearecausedbythedecreaseinpointdefects,theincreaseingrainsize,andtheimprovementinlatticestructureintegrityofthefilms.

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简介：在之中无铅焊接材料，Sn-Ag-Cu合金有许多优点优异界面的性质和高度例如好弄湿的性质，爬抵抗。在这篇文章，组织和Sn-Ag-Cu材料的焊接性能被调查。二合金的表面形态学被实体镜的显微镜观察并且扫描电子显微镜(SEM)。化学宪法被X光检查精力散的光谱学(版本)检验。Sn-Ag-Cu的机械性质焊接Sn-Cu与那些相比系统地被评估焊接。结果证明Sn-Ag-Cu焊接基于不同焊接垫不同焊接性质。在接口的金属间化合的化合物(IMC)的厚度与老化时间增加。为镀金的垫，有很多IMC图，并且在焊接连接它能减少电的连接的可靠性。Sn-Ag-Cu焊接关节表演在传统的Sn-Cu上的一个优异机械性质焊接。酒窝减少和洞的数字增加因为Sn-Cu0.7合金和Sn-Ag3.0-Cu0.5合金的破裂表面有同类地分布式的许多小尺寸酒窝。