746
This paper studied deep learning–based on-line defects detection for aluminum alloy in robotic arc welding using Convolutional Neural Networks ( CNN ) and weld images .
 concept or principle: defects; material: aluminum alloy; manufacturing process: arc welding; concept or principle: Neural Networks; engineering feature: weld; concept or principle: images
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: defects; material: aluminum alloy; manufacturing process: arc welding; concept or principle: Neural Networks; engineering feature: weld; concept or principle: images