When the maximum likehood estimation of relative difference is perform ,the denominator of relative difference may be zero.

Linear combination forecast based on relative error criterion;

The model is used to analyze the relative error of forecast and to forecast the exploitable geological ore reserves of Miaogou Mine in 2007.

The calculation methods of pH and relative error were studied in different acid-base solution.

Study on Controlling Principles and Methods of Halftone Dot Accretion and Relative Contrast Control;

The different charecteistics of the prints with different screen rulings are detail analysed,such as solid density,dot size,light spectrum,chromaticity of Lab,relative contrast,and dot gain.

The meaning of four parameters in printing quality control was introduced,of which were solid density,dot gain,relative contrast,and trapping percentage.

When applying this method for the trehalose samples, the relative error is not more than 3.

Compared with soil CRM certificate,a better determination result can be obtained with relative error being between 0 ~ 10% except sodium oxide and magnesium oxide.

According to the 1/2 standard of American Clinical Laboratory Improvement Amendment (CLIA,88),the relative bias of the reference analyzer and other assessed analyzers were determined.

At the same time,the paper gives an illustration of this new model and compares the relative deviation between EIV prediction model and Multivariate Regression Prediction Model,and shows that the EIV prediction has better precision of prediction.

This paper tries to find out the changing regularity of relative deviation by calculating the settlement quantity of foundation soil according to two different choosing value standards and comparing them with each other.