5493
The hybrid-homogenized model facilitates transforming the general optimization problem into a shape optimization process with the relative density of unit cells as design variables .
 concept or principle: model; concept or principle: optimization; concept or principle: optimization; machanical property: relative density; concept or principle: unit cells; material: as
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: model, optimization, optimization, relative density, unit cells, as 
Answer:
 concept or principle: model; concept or principle: optimization; concept or principle: optimization; machanical property: relative density; concept or principle: unit cells; material: as