在生产斗争和科学试验中,我们常常会遇到需要建立经验公式的问题,即希望通过对生产或试验中得到的一组数据的分析,定量地建立一些互相联系着的变量之间的关系式,以加深我们对于事物内在规律的认识,更好地指导我们的实践。例如,在机械加工中,建立起切削时间与刀具磨损量之间的关系式,对于保证加工零件的尺寸是很有意义的;又如,在x光无损检验中,建立透视电压与被透视零件厚度之间的关系式,有助于提高透视灵敏度,保证产品质量;再如,在产品设计中,找出产品的性能指标与设计参数之间的定量关系,有助于我们克服盲目性,提高设计质量;……。回归 In the struggle for production and scientific experimentation, we often encounter the problem of the need to establish empirical formula, that is, we hope to quantitatively establish the relationship between the variables associated with each other through the analysis of a set of data obtained in production or experiment To deepen our understanding of the inherent laws of things and to better guide our practice. For example, in machining, the relationship between cutting time and tool wear is established. It is very meaningful to ensure the size of machined parts. For another example, in the X-ray non-destructive test, the relationship between the see-through voltage and the see- Thickness of the relationship between the help to improve the sensitivity of perspective to ensure product quality; Another example, in product design, product performance and design parameters to find the quantitative relationship between, helps us to overcome the blindness and improve Design quality; .... return