Modeling strategies of SEM(模型的用途) Model confirmation:验证(confirmatory)先设模型的恰当性 Model generation:设起始模型,与观察数据比较之后,进行必要的修正,反复估计而得到最佳拟合的模型 Model competation:利用不同模型的比较以决定何者最能反应真实数据 1、模型设定(model specification) 2、模型识别(model identification) 3、模型估计(model estimation) 4、模型评价(model evaluation) 5、模型修正( model modification)
Abstract: Several 13-alkyl substituted analogs of berberine and palmatine were found to be highly active against two types of Staphylococcus aureus(SI and S2)of different origin. The most active 13-hexylberberine was 8 times more active(against SI)and the same order active(against