2216
We built this model based on the observation that any AM process exhibits a high level of redundancy and periodicity , making it an ideal problem for machine learning and surrogate modeling.We introduced a unique geometry representation that is the key insight for this work .
 model, AM process, machine, geometry
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 model, AM process, machine, geometry