Application of Least Squares in Highway Experimental Data Processing

In the calculation of the elasticity modulus and the 1000h laxity ratio of the steel strand for prestressed concrete,the mathematical models and the correlation coefficient were established according to the excel tables,and at the same time the method of least squares and the method of linear regression were adopted.The results show that the ideal equation and the accurate results could be obtained.This method can be successfully applied in the data processing of other highway experiments.