简介:Althoughtheperformanceofmembranereactors(MR)ishighlyaffectedbytheratioofmembranearea-toreactionvolume,therearefewstudiesonthiseffectowingtothedifficultiesassociatedwithreactormanufacture.Inthisstudy,anMRwithhighA/Vratio,adiameterof35m,andaheightof0.8mmwasfabricated.SeparationperformanceofthisMRwasinvestigatedinann-butanol/watersystem.Esterificationofaceticacidandn-butanolwasusedasthemodelreactiontoinvestigatetheperformanceofcatalyticallyactivemembranereactors(CAMR)withdifferentA/Vratios.Thereactionconversionwas38.59%intheCAMRwiththehighA/Vratioof12,497/m,whichwasmuchhigherthanthatinotherCAMRs,forreactiontimeof60minandW/Vfratioof0.093g/mL.ExcellentcatalyticstabilityoftheCAMRwasconfirmedbyperforminglong-termstabilityexperiments.
简介:2017年年初的一句“我可能复习了假书”走红后,互联网上立即涌现出一大批“假”现象,它们与传统的真假相背离,却受到社会的一致热捧。拟对“主语+可能+V了假N”进行句法和语义、语用上的考察,并分析“假”现象泛化的动态过程及其语用价值。
简介:INTRODUCTIONForChinesestudentsofEnglish,grammarlearningissoimportantthattheirtextbooksinevitablyentailgrammarsectionsorganizedinalinearway.ThesestudentstreatgrammarlearningasthesteppingstoneontheirwayofEnglishlearning.Theyhopetohaveagoodcommandofgrammarbothfortheirpresentlearningandfortheirfurtherstudies.Fortheirpresentlearning,theirlinguisticknowledgeistestedandassessedthroughexaminations
简介:在认知语法的理论框架下研究"给"字结构"NP1+V+给+NP2+NP3"的象征关系发现,"给"字结构"NP1+V+给+NP2+NP3"和其语义结构"施事+动作+与事+受事"之间的象征关系是通过"自主/依存联结"实现的。运用"新自主/依存联结"分析模型分析了"NP1+V+给+NP2+NP3"的语义合成过程,以期对其语义建构机制做出合理的解释。