2023
In this approach , the unit cell domain is discretized into elements which are then themselves optimized using topology optimization methods , similar to discussions in the previous section .
 concept or principle: unit cell; concept or principle: domain; material: elements; engineering feature: topology optimization
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: unit cell; concept or principle: domain; material: elements; engineering feature: topology optimization