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The simulation results are compared with the analytical model and experimental findings by measuring the spacing evolution under the solidification condition Exciting progress in additive manufacturing ( AM ) technology , which enables fabrication of cellular structures with highly complex lattices and pores , has stimulated the development of lightweight structural products with improved performance and increased functionality .
 simulation, model, experimental, evolution, solidification, additive manufacturing, AM, technology, fabrication, cellular structures, lattices, pores, lightweight, performance
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:
 simulation, model, experimental, evolution, solidification, additive manufacturing, AM, technology, fabrication, cellular structures, lattices, pores, lightweight, performance