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FORTRAN code is used to solve the phase field equations , which incorporates the temperature gradient and solidification velocity as the simulation parameters .
 concept or principle: phase; process parameter: temperature gradient; process parameter: solidification velocity; material: as; enabling technology: simulation; concept or principle: parameters
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: phase, temperature gradient, solidification velocity, as, simulation, parameters 
Answer:
 concept or principle: phase; process parameter: temperature gradient; process parameter: solidification velocity; material: as; enabling technology: simulation; concept or principle: parameters