Document tells us about stable and efficient Weighted Least Squares algorithm which is used widely in optimization and estimation tasks.

本文以管网阻力系数校核、节点流量实时校核与漏损定位为主要研究内容，提出了基于经验信息的加权最小二乘管网阻力系数校核法。-In this paper, the pipe network drag coefficient checking, checking and real-time traffic node leakage positioned as the main research content is proposed based on the weighted least squares