考虑个体差异的氯氧镁水泥混凝土涂层钢筋寿命预测

王鹏辉,乔宏霞,冯琼,曹辉

Life prediction of coated steel with individual difference in magnesium oxychloride cement concrete

Peng-hui WANG,Hong-xia QIAO,Qiong FENG,Hui CAO

表 6 考虑和不考虑个体差异的参数估计结果

Tab.6 Parameter estimation results of considering and not considering individual differences

估计方法 ${\mu _a}$/10−5 $\hat \sigma _a^{\rm{2}}$ b c ${\rm{ln } }\,L\left( \theta \right)$ AIC M-1 0.690 9.660×10−14 0.002 1 73.84 −139.6 M-2-A 4.500 3.400×10−6 − − −473.8 946.3 M-2-B 4.432 3.398×10−6 − − −442.6 881.2 M-2-C 4.714 3.523×10−6 − − −432.5 861.0