least square error approximation meaning in English

最小二乘方逼近
最玄乘方逼近

Combining with practical investigation and analysis , the author presented the fitting equation of the second non - uniform coefficient in which the method of least squares error approximation with the power index regression is used and proposed a modified formula for flow rate per second calculation to precisely determine the size of pipeline and to make the design advanced in technology and reasonable cost
本课题分析了室外和室内的设计流量公式，通过调查、实测本地区的水量资料，运用相关数学方法分析，提出了适合小区给水管网采用的流量公式。