We suggest "errorofclosure" asa criterion of measuring accuracy and use transient root-mean-square error to ex-press repeatability and reliability of measurement of the instrument.
An error in closure stress measurement can lead to a significant error in the estimation of the net pressure and, consequently, the fracture geometry.
闭合应力测量的错误会对净压估计,以及随后的断裂几何形状的估计造成严重的错误。
3
The paper analyses the teaching of Engineering Survey, describes the basic concepts oferror including the definitions of accident error and closure, and finally provides examples for teaching.