关键词: 线性回归, 多项式回归, 长期稳定性, 消应

Abstract: This paper analyzes present situation and existing problems in tests of dam safety monitoring instruments, and proposes that the items such as insulation, temperature measurement error, resolution, non-linearity (non-coincidence), non-repetition, hysteresis (return difference), comprehensive error, relative error, and 0 ℃ resistance difference, cable waterproof sealing, conductor resistance and leak check for differential resistance instruments shall be taken as field test items. It also proposes the idea that least squares method should be adopted for testing data analysis, and points out that long-term stability tests is of importance and necessity and they should be specially studied and stipulated.

Key words: linear regression, polynomial regression, long-term stability, stress relieving