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A geometrical model proposed to predict the layer thickness of a given layer during such bead-on-bead deposition showed good correlation with experimental data .
 concept or principle: geometrical model; process parameter: layer thickness; process parameter: layer; concept or principle: bead-on-bead deposition; concept or principle: experimental data
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: geometrical model; process parameter: layer thickness; process parameter: layer; concept or principle: bead-on-bead deposition; concept or principle: experimental data