简介:摘要随着我国社会不断地发展以及经济水平地提高,我国各个行业取得了迅速的发展,当然我化工业也不例外。在我国,化工业作是三大产业之一,对我国的经济发展来说有着非常的重要作用。其中,氧化铝是化工业中的重要原料之一,对我国的化工业发展有着十分重要的意义。但是有关氧化铝焙烧的过程中的细化仍然存在很多问题,这在很大程度上对氧化铝的发展造成了非常严重的影响。所以我们就要努力找到相关有效的措施来解决这些问题,提高氧化铝的使用效率,促进我国化工业的发展。接下来,本文将从氧化铝在焙烧过程的细化中主要存在的问题以及其解决措施的研究,进一步分析如何才能够更好的提高氧化铝的利用率。
简介:Nowstudyingfordoctor'sdegreeatinstituteofSystemsScience,AcademiaSinica.TheoremDI4]Letk21beaninteger.IfGisaconnectedclaw-freegmphwithhiV(G)levenandwithminimumdegreee(G)atleastZk,thenGhasak-factor.Inthispaper,wegeneralizedtheresultofTheoremC,andobtainthefollowingTheoremifGisanN'-locallyconnectedclawtheegraphwithb(G)22,thenGhasa2-factor.2.LemmasLemma1IfGisanN'-locallyconnectedclaw-acegashwith6(G)22,thenforeachxo6V(G),Ghasashonestcyclecontainingxoandhavingatmost5venices.Lemma2IfGisanN'--locallyconnectedclaw-fr?
简介:摘要采用酸催化溶胶-凝胶法制备了沸石负载的TiO2臭氧催化剂,考察了制备条件对负载型TiO2催化剂的晶相和形貌的影响。结果表明,采用沸石为载体时,TiO2以纳米颗粒的形态分散在载体表面,反应溶液的PH值直接导致了形成的TiO2晶相,研究结果表明氢离子浓度0.1mol/L~0.82mol/L,形成的晶相为金红石。同时酸的种类及、无水乙醇的加量入对晶相形成关系不大。
简介:TheemergenceofB2Belectronicmarketshasgreatlychangedtherelativebargainingpowerofbuyersandsellers.Westudytheequilibriummarketstructureinabuyer’smarket.Wefindthatbuyer-controlledB2BmarketsandneutralB2Bmarketshavedifferentequilibriumstructures,andtheemergenceofB2Bmarketswillincreasesocialwelfare,butitseffectonbuyersandsellerswillbedifferent:B2Bmarketsincreasetheconsumersurplusoftheendmarket,buttheireffectsonbuyerandsellerprofitsaremoderatedbytherelativebargainingpowerofbuyersandsellers.TheprofitsofthesidewithmuchweakerbargainingpowerwilldecreaseduetotheintroductionofB2Bmarkets.
简介:ThemixedH2/H∞guaranteedcostcontrolproblemviastatefeedbackcontrollawsisconsideredinthispaperforlinearsystemswithnorm-boundedparameteruncertainty.Basedonthelinearmatrixinequality(LMI)approach,sufficientconditionsarederivedfortheexistenceofguaranteedcostcontrollerswhihcguaranteenotonlyaprespecifiedH∞disturbanceattenuationlevelononecontrolledoutputforalladmissibleparameteruncertainties,butalsotheworst-caseH2performanceindexontheothercontrolledoutputtobenomorethanaspecifiedbound.Furthermore,aconvexoptimizationproblemisformulatedtodesignanoptimalH2/H∞guaranteedcostcontroller.