简介：Thefollowingresultsareobtained:1.Aspaceissubmetacompactiffitisalmostdiscretelyθ-expandableandstrictlyquasi-paracompact.2.Aspaceisparacompactiffitisθ-expandableandstrictlyquasi-paracompact.

简介：DavidCopperfieldisoneofthemasterpiecesofthefamousBritishnovelistCharlesDickensinthe19thcentury.DickensportraysaseriesofcharacterswithdistinctivedispositionsuchasDavidCopperfield,thePeggottys,Mr.andMrs.Micawber,Murdstone,UriahHeepetc.Throughtheactionsandconflictsofthesefigures,theauthorrevealsthepanoramaofthesociallifeatthetime.

简介：作者在局部地凸的空格给稳固的锥的双描述。从这，作者为判定凸的锥在局部地凸的空格的各种各样的类型稳固获得一些标准。用一个稳固的锥的内部的一个一般表达式，作者获得很多个必要、足够的条件让凸的锥在Banach空格的框架稳固。特别地，作者给在稳固的锥和概括的锋利的锥之间的一种双关系。相关已知的结果被改进并且延长。

简介：　　Inrecentyears,constrained-geometrygroup4metallocenecatalystshavereceivedconsiderableattentionduetotheirimportanceincommercialapplication［1］.Thestructuralfeatureofthistypeofmetallocenesisthatoneofthetwocyclopentadienylgroupsinansa-metallocenecomplexesisreplacedbyaheteroatom,suchasnitrogen,phosphorus［2］oroxygen［3］andetc.Incomparisonwithbiscyclopentadienylmetallocenes,theconstrained-geometrymetallocenecatalystshavemoreopenspaceforolefincoordination,whichallowslargerα-olefinstocopolymerizewithethyleneeasily.ThiskindofcompoundswouldhaveabettercatalyticperformanceifaphenolgroupwereintroducedintotheligandframeworksincetheOinthephenolgroupismorenegativethanN,Pintheamido-orphosphido-groups,andthewholemoleculewiththephenol-cyclopentadienylligandwillbemorestablecomparedtothecomplexeswithamido-or……

简介：ThecharacterizationofisotropicBesovspacesforintermsofprogressivedifferencesofafunctionondyadicpointsisobtained.Moreover,forwithananalogouscharacterizationofanisotropicBesovspacesispresented.

简介：这份报纸为最好的制服处理Kolmogorov标准coapproximation和强烈独特的最好的一致coapproximation。在最好的一致近似和最好的一致coapproximation之间的一些关系被获得。一些平等和最好的一致coapproximation被连接。

简介：Polyanilinefilmwaspreparedbyelectrochemicalmethodinanacidicsolutionofaniline.Themicromorphologyofthepolyanilinefilmwastransformedtothree-dimensionalnetworkstructureinsteadoflittleparticleswhilethedepositiontimewasextended.Thepeakwavelengthofthephotoluminescencespectrumwas491nm.Theluminousintensityincreasedwiththeextensionofdepositiontime,andsodidtheelectrochemicalactivity.

简介：InthisarticletheCn-graphsareintroduced,bywhichacharacterizationoftheembeddabilityofagraphoneitheranorientablesurfaceoranon-orientablesurfaceisprovided.

简介：大多数geospatial现象能被解释概率的联盟者因为我们不知道生物物理的过程和机制，那联合创造了并且观察事件。因为我们关于在在取样的地点的学习下面的现象肯定，这哲学是重要的，除了测量错误，，但是，在之间取样，我们关于现象怎么表现变得不明确。Geostatistical不确定性描述是以如此的一个方法产生随机数，他们模仿创造了存在样品数据的随机过程的结果。存在样品的这个集合被看作那个随机的功能模型的一条部分取样的认识。随机的功能的空间可变性被一张变量图或协变性模型描述。在他们的地点奖励样品数据，并且反映空间结构的认识到的表面需要由变量图模型确定了。他们应该各复制整个采样区域的样品直方图代表。这篇论文将由盖住univariate和指示物技术在随机的模拟考察基础希望他们在geospatial信息科学的应用将普遍、多产。

简介：

简介：AssumethatBisacompactsubsetontherealaxiscontainingatleastn+1points,C（B）thenormedlinearspaceofallcontinuousfunctionsdefinedonB,withChebyshevnorm‖·‖,andG=span（g1,…,gn）ann-dimensionalsubspaceofC（B）.LetGR={g=sumfromj=1tonajgj:v（x）≤g（x）≤u（x）,qi≤sumfromj=1tondijaj≤pifori=1,…,l}whereu,vareextendedreal-valuedfunctionsonBsubjectto-∞≤v（x）

简介：

简介：TheX-rayphotoelectronspectroscopy(XPS)techniquewasusedtostudythereactionofphenylisocyanateandcellulosewithdifferentmoisturecontents(MC).TheC1SXPSpeakofcelluloseisonlyonesymmetricalcontributionat285.95eV.WhiletheC1SXPSpeaksofN,N-dibenzylurea,thereactionresultantofphenylisocyanateandwater,havetwocontributionsat288.6±9.1eVand284.7±0.1eVcorrespondingtothecarbonylgroupandphenylringgroup,respectively.Theirarearatioisbetween11.88and11,98thatisquiteneattothetheoreticalvalueof12.0.Withthemoisturecontent(MC)ofcelluloseincreased,theproportionofisocyanatereactedwithwaterincreased.WhentheMCreaches9.78%,92.98%ofallconsumedisocyanatewillreactwithwater.Byspatteringanalysis,itrevealsthatthereactionresultantsofbenzylisocyanatedistributemainlyonthesurfaceofcellulose.

简介：让C是一个锥并且认为一个伪标准是在它上定义的p。我们学习夫妇的结构(C，p)作为在功能p也的情况中的一个拓扑的空格单调。当一个伪标准锥的拓扑学能借助于一个单调标准被定义时，我们描绘。我们也定义并且学习一个单调normed锥和一个一般的锥的单调商的双锥。我们提供允许我们作为对单调商同形的一个单调潜水艇锥和另外的特别潜水艇锥的直接的和写一个锥的一条分解定理。

简介：Fullysolublepoly[2-methoxy-5-(2’-ethylhexyl)-oxy)-p-phenylenevinylene](MEH-PPV)wassynthesizedbytheadditionofmolecularweightmodifiers(chainstopper,freeradicalscavengers)toapolymerizationsystemcontainingmonomer,catalystandasolvent.ThesePPVproductssynthesizedinthisworkwerecharacterizedbyIR,NMR,UV-visiblespectroscopyandGPC.ResultsshowthattheM_wofpolyphenylvinylene(PPV)canbecontrolledbytheadditionofchainstopper(benzylbromide)andradicalinhibitor(2,6-di-tert-butyl-4-methylphenol).Thepolymerizationmechanisminthepresenceoftheseadditiveswasalsodiscussed.AdualmechanisminvolvingcarbeneforPPVpolymerizationwasproposed.

简介：Anovelsmallband-gapconjugatedpolymer-poly[(3-acetylpyrrole-2,5-diyl)(4-dimethylaminobenzyliene)(3-aeetylpyrrolequinodimethane-2,5-diyl)](PAPDMABE)-anditsprecursorweresynthesizedbyasimplemethodandcharacterizedby1H-NMR,FT-IR,TGAandUV-VIS.ThepolymercanbedissolvedinstrongpolarsolventssuchasDMSO,DMForNMP.Theband-gapenergyofPAPDMABEwasfoundtobe0.95eV.Theconductivityofdopedproductswithiodinefallsintherangeofasemiconductor.``

简介：<正>WegiveseveralequivalencesofBlochfunctionsandlittleBlochfunetions.UsingtheseresultsweobtainthegeneralizedCarlesonmeasurecharacterizationofBlochfunctionsandthegeneralizedvanishingCarlesonmeasurecharacterizationoflittleBlochfunctions,thatis,f∈Bifandonlyif|Dβf（z）|p（1-|z|2）βp-1dm（z）isageneralizedCarlesonmeasure;f∈B0ifandonlyif|Dβf（z）|p（1-|z|2）βp-1dm（z）isageneralizedvanishingCarlesonmeasure,whereDβf（β>0）isthefractionalderivativeofanalyticfunctionfoforderβ,mdenotesthenormalisedLebesguemeasure.

简介：文昌鱼最近是现存的种到脊椎动物的祖先。文昌鱼的分发将为脊椎动物的进化研究借给一些提示的microRNA(miRNA)的观察。在这研究，使用佛罗里达文昌鱼(Branchiostomafloridae)的公开可得到的支架数据染色体，我们屏蔽了并且描绘在另外的种类被识别了的miRNAs的相当或相同的事物。总共，68个如此的相当或相同的事物被获得并且分类家庭进33。大多数这些miRNAs在染色体作为簇被散布。内部种类的比较证明许多miRNAs，以前作为脊椎动物特定或哺乳动物特定被认为，也是在文昌鱼的现在，当以前被看作了protostome特定的某miRNAs也在文昌鱼存在时。与ciona相比，文昌鱼有明显的miRNA基因扩大，但是种系发生的分析证明文昌鱼的复制miRNAs或簇在脊椎动物比那些复制的有更高的相同水平。

简介：Aseriesofuncharged,anionic,cationic,andheparinizedpolyetherurethanes(PEUs)wassynthesized.ThesoftsegmentsofthesePEUswererespectivelyobtainedbypolyte-tramethyleneoxideofmolecularweight1000(PTMO-1000),polythyleneglycolofmolecularweight1000(PEG-1000),PEG-4000,andthemixtureofPEG-4000withPTMO-1000orPEG-1000.Thehardsegmentsconsistedof4,4’-methylenediphenylenediisocyanate(MDI)whichwasextendedwithethylenediamie(ED),1,4Mbutanediol(BD),N-methyldiethanolamine(MDEA),orL-Sodiumα,ε-diaminocaproate(SDAC),respectively.ThechemicalstructureofdifferentPEUswasconfirmedbynuclearmagneticresonance.Waterabsorptionsweremeasured.Theresultsshowedthattheionic,heparinizedPEUs,andthePEUscontainedPEG-4000assoftsegmentshavehigherwaterabsorptionsthanordinaryPEUs.ThePEUsbasedmainlyonPEG-4000assoftsegmentsareakindofhighhydroscopicpolymermate-rials,andtheirhydroscopicityincreaseswithPEG-4000insoftsegment.

简介：Nanoscalemullitepowderweresynthesizedviasolgel-SCFDandmiddletemperaturetreatmentbyusingAIP(aluminum-isopropoxde)andTEOS(tetraethylorthosilicate)asstartingmaterials.Bothofthebinaryaerogelofalumina-silicaandcalcinednanoscalematerialswereinvestigatedbyusingTG-DSC(thermogravimetry-differentialscanningcalorimeter),TEM(transmissionelectronmicroscope),XRD(X-Raydiffractometer)andspecificsurfaceareaandporosimetry.TG-DSCindicatedtheremovalofmostofthevolatiles,i.e.15.98%uptoabout700℃,andintheDSCcurve,existenceoftwoexothermicpeakatabout445℃and1015℃maybeduetothecrystallizationofSi-O-Al-Oindiphasicgelsandmullitizationandasmallendothermicpeakatabout805℃indicatedthedecompositionofstructuralwatermolecules.OnthecolligationoftheresultsofTG-DSC,XRDandTEM,thebeginningtemperatureofmullitizationinAl2O3-SiO2aerogelsystemcanbeconfirmedatabout1015℃.XRDresultsalsoshowedtheformationofmulliteattherange1100-1200℃.TEMandsurfaceareaandporosimetryresultsshowedthatthenanosizedmullitewerecalcinatedat1100and1200℃exhibitedsize30nmand50nm,specificsurfacearea138.91m^2/gand95.81m^2/g.