detection of defects
3.Theory analysis and reflective deflection method ofnondestructive detection deep defects in solid sheet materials using thermal lens effect induced by laser beam on surface of the solid are described.Three dimension image and grey image of defects which abtained by processing of two dimension scanning signals using computer are displayed.It is shown that the deep detecting defects is decreasing with increasing of modulation frequency of pump beam and detecting deepness is deeper by phase signals as compared with by amplitude signals,Which is coincident with prediction by theory analysis.
4.In this paper, regarding nondestructive testing of surface defects (for example, grinding-cracks of solid carbide cutting tools etc), we emphatically analyze post emulsification fluorescence penetrant flaw detection method and application in the field of quantity controlling for solid carbide cutting tools, and we put forward procedure process and procedure parameter of fluorescence penetrant flaw detection for cutting tools.
7.As active defense technology, IDS(Intrusion Detection System) compensates the defects of traditional defense technology, but in the face of rapid updated network configurations, the drastic increase of network traffic and so many new attack methods, traditional IDS has some limitations: poor adaptability, inability to detect novel attacks;
8.The design of TCG-2000 type on line device of vortex flow flaw detection for weld metal in the high frequency straight bead welding pipe adopt longitudinal magnetization way for the local zone in the weld metal. As a result of the ferromagnetic weld metal saturation, the defects are liable to detect.
9.Expoles an algorithm about bearing surface defects detection by support vector machines that is the new branch of machine learning, in which the defective area and non-defective area are treated as two different textures and are sampled respectively to be learned, in order to reduce dimension, the image data can be processed by PCA.
