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In order to improve the robustness and generalization ability of the CNN model , weld images from different welding current and feeding speed were captured for the CNN model .
 machanical property: robustness; concept or principle: model; engineering feature: weld; concept or principle: images; manufacturing process: welding; concept or principle: model
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:
 machanical property: robustness; concept or principle: model; engineering feature: weld; concept or principle: images; manufacturing process: welding; concept or principle: model