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Selection of the best process parameters for the pulsed SLM processes is a fundamental problem due to the increased number of parameters that have a direct impact on the melt pool compared to the continuous SLM processes .
 concept or principle: process parameters; manufacturing process: SLM; concept or principle: processes; concept or principle: parameters; concept or principle: impact; material: melt pool; manufacturing process: SLM; concept or principle: processes
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: process parameters, SLM, processes, parameters, impact, melt pool, SLM, processes 
Answer:
 concept or principle: process parameters; manufacturing process: SLM; concept or principle: processes; concept or principle: parameters; concept or principle: impact; material: melt pool; manufacturing process: SLM; concept or principle: processes