简介：为形式的闲差事分析过程，模特儿由Ghobarah等求婚了。(此后打电话给G模特儿，1999)被扩大了说明对充分的理由运动激动的结构的全球地震损坏的短暂更高的模式的贡献。建议模型身体上并且完美地衔接了G模型，最后的弄软模特儿由DiPasquale和Cakmak(1988)求婚了。相应于所有考虑颤动模式的形式的损坏索引被CQC规则或SRSS规则联合。增长动态分析(IDA)在三个例子RC框架上被执行验证建议模型，并且全面比较被执行。示范显示建议模型是安逸的实现并且在结构的损坏进化上在短暂颤动时期和模式反映转变的影响。与建议模型联系的一些限制也被探讨。进一步试验性的确认被需要以后改进模型。

简介：Throughimprovingtheagingprocessduringsynthesisofthesupport,γ-Al2O3withlargeporevolumeandhighsurfaceareawassynthesizedbyafacilesecondaryreformingmethod.Thesynthesisparameters,suchasthereactiontemperature,thefirstagingtemperatureandthesecondagingtemperature,wereinvestigated.Thetexturalpropertiesofγ-Al2O3werecharacterizedbymeansofN2adsorption-desorptionisotherms,X-raypowderdiffractometry(XRD),scanningelectronmicroscopy(SEM),Fouriertransforminfrared(FTIR)spectroscopyandthermogravimetry(TG).TheexperimentalresultsindicatedthatAACHandamorphousAlOOHweretheprecursorsofalumina,whichwereformedviaprecipitationfromsolutionsafterreactionofaluminumsulphatewithammoniumhydrogencarbonate.Theprecursornanocrystallitesgrewandre-assembledduringthesecondaryreformingprocess,whichresultedinanincreasedporesizeandporevolumeandadecreasedbulkdensity.Theas-synthesizedγ-Al2O3materialsfeaturedmeso/macroporosity,largeporevolume(2.175cm3/g),highsurfacearea(237.8m2/g),andlowbulkdensity(0.284g/mL).