Abstract: The influence of electrochemical conditions on the resistance of eutectic gallium indium alloy （EGaIn） in sodium hydroxide solution was studied by constructing an electrochemical reaction device. The experimental results show that the EGaIn resistance changes nonlinearly under multivariable influence （including EGaIn volume,electrode voltage,NaOH solution concentration and electrode diameter）. Generalized additive model （GAM） was used to systematically analyze the multivariate interactions and reveal the nonlinear effects of various factors on the resistance. Compared with the traditional linear regression method,GAM can effectively handle the interaction effects between multiple variables. The results are of significant importance for enhancing the efficiency and safety of electrochemical sensors in various fields,such as environmental monitoring,energy storage,industrial process control,and smart wearable devices.

Key words: EGaIn, liquid metal, nonlinear resistance, generalized additive model