Three factors namely,propagation loss,plate defects and temperature variation,which(affect) the performance of the lithium niobate waveguide F-P filter are analyzed and discussed theoretically.

Artificial neural network detecting method for cast products surface defects based on machine vision;

Study for the detection surface defects of the model by scanning with planar CCD array;

HDDR NdFeB Magnet powder surface defects and their causes;

Ductile tearing assessment of surface flaw in circumferential weld of pipe-line based on J integral parameter;

Study of surface flaw on PAN-based carbon fiber by SEM;

Analysis of eddy current detector used for testing surface flaw of steel ball;

Enhancement of an ultrasonic B scan image of planar defect;

Characteristic and recognition of ultrasonic TOFD signal and image for planar defect;