简介:用maghnite-H+的tetrahydrofuran的cationic戒指洞聚合被报导。Maghnite-H+,从质子发出的无毒的稳固的催化剂被交换montmorillonite泥土。Polytetrahydrofuran,也poly打电话(butandiol)醚,与醋酸盐和氢氧根结束,组们成功地被综合。反应温度,开始者/单体的重量比率和单体的变换上并且在分子的重量上的反应时间的效果被调查。反应的cationic机制被建议。这化学能为poly准备被看作一条合适的线路(THF)作为为热塑的弹性体的一个软片断。
简介:ConstructingareasonablereactionkineticmodelforCr-containingwasteincinerationisofhighsignificancetostudytheeffectofvariousfactors,suchastemperature,Cl,onitshexavalentchromiumcompounds.Inthispaper,aprimaryCr/H/Air/ClreactionkineticmodelisbuiltandstudiedbyGaussian03codewithquantumchemistrytheory.Numericalresultsshowthattherearetwooverallreactionsinthemodel,eachofthetwooverallreactionsconsistsoftheirrespectivetwoelementaryreactions.Sothetwooverallreactionsshouldbeomittedfromthemodel.Instead,thefourelementaryreactionsshouldbeaddedintheCr/H/Air/Clreactionkineticmodel.Theactivationenergiesofthefourelementaryreactionsarealsocalculated.
简介:ThispaperdealswiththeoutputfeedbackH∞controlproblemforaclassofnonlinearstochasticsystems.Basedonthelatestdevelopedtheoryofstochasticdissipation,anotableresultaboutthenonlinearH∞outputfeedbackcontrolofdeterministicsystemisgeneralizedtothestochasticcase.Finally,inthecasesofstatefeedbackandoutputfeedback,twofamiliesofcontrollersareprovidedrespectively.
简介:本文得到几个关于多变量Hp空间中函数Fourier系数的不等式.与单变量相应情形相比,我们的证明方法有较大的变化.
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简介:Letq≥3beanoddnumber,abeanyfixedpositiveintegerwith(a,q)=1.Foreachintegerbwith1≤b
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简介:AseriesofMo-impregnatedHβsamples,withMoO3loadinginHβzeoliteinthemassfractionrangeof0.5%-6.0%,werestudiedbymeansofXRDandIRinordertocharacterizetheirstructures.Mo/Hβsampies'crystallinityalmostlinearlydecreaseswithincreasingtheamountofMoO3loaded,TheIRspectraandXRDpatternssuggestthattheprogressivedestabilizationoftheHβzeolitestructureiscausedbyincreasingMoloadingin(MoO3+Hβzeolite).Duringthecalcination,Al2(MoO4)3formedfromthedealuminationofHβzeolite,causesthesubstantiallypartialbreakdownofthezeoliteframeworkwhentheMoloadinginMoO3+Hβisrelativelyhigh.
简介:SupposethatDisadivisionringinwhichthereisdefinedananti-automorphismα→(?)isinvolutorial,RisaleftvectorspaceoverD.Usingthegivenanti-automorphismα→(?),itiseasytoturnRintoarightvectorspaceoverDbysetingx(?)=ax.Bilinearformg(x,y)connectingtheleftvectorspaceRandtherightvectorspaceRisaHermitianscalar.
简介:Wedesignafamilyof2DH~m-nonconformingfiniteelementsusingthefullP_(2m-3)degreepolynomialspace,forsolving2mthellipticpartialdifferentialequations.Theconsistenterrorisestimatedandtheoptimalorderofconvergenceisproved.Numericaltestsonthenewelementsforsolvingtri-harmonic,4-harmonic,5-harmonicand6-harmonicequationsarepresented,toverifythetheory.
简介:§1.IntroductionInthispaperweconsidertheparabolicsystem(?)t/(?)ui-div(|▽u|p-2▽ui)=0(1≤i≤m),withp>1,whereui=ui(x,t),▽=gradxandxvariesinanopendomainΩ(?)RN.Thesystemisdegenerateifp>2orsingularif1