在许多实际问题中,影响考察指标的因素很多。如微机炉前快速测定系统中,合金的化学成份、金相组织和机械性能不仅与其冷却曲线的液相线温度T_L有关,还与固相线温度T_S过冷度△T等特征参数有关。对于这一类问题要用多元回归分析方法。在多元回归分析中,着重讨论多元线性回归问题。对于多元非线性问题可以通过设立辅 Among many practical problems, there are many factors that affect the inspection indicators. Such as the computer furnace rapid determination system, the alloy chemical composition, microstructure and mechanical properties not only with the cooling curve of the liquidus temperature T_L, but also with the solidus temperature T_S subcooling △ T and other characteristic parameters. For this type of problem to use multiple regression analysis. In multiple regression analysis, we focus on the multiple linear regression problem. For multiple nonlinear problems can be set up through the auxiliary