In view of different defect types,the methods and developments in domestic and foreign of the remaining strength assessment about defect pipelines were introduced,technical thoughts of remaining strength was introduced.

To the bad noise interference problem occurred in the signal of pipeline defect magnetic flux leakage inspection,the empirical mode decomposition(EMD) method developed recently was used to the noise suppressing and the effective signal extraction for the signals of magnetic flux leakage inspection.

In ultrasonic nondestructive testing of pipeline defect, the echo signal of pulse reflection, which is used as a basic testing data, is disturbed by electronic noise (including thermal noise and digitalization noise), and structure noise.

This paper proposes a new method for detecting casing disfigurement based on image processing and pattern recognition.

This paper proposes a new method of casing disfigurement detecting based on image processing and pattern recognition.

Research and Application of Defect Management in the Process of System Development;

Software Defect Management Based on Software Measurement;

Design and Implementation of Software Defect Management System Based on Meajurement