943
It has been shown that the weld bead geometry can be controlled by the spatial and temporal distribution of laser energy on the surface of workpiece , such as power density , interaction time and energy density .
 process parameter: weld bead geometry; material: be; concept or principle: distribution; concept or principle: laser energy; concept or principle: surface; concept or principle: workpiece; material: as; machanical property: density; process parameter: energy density
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:
 process parameter: weld bead geometry; material: be; concept or principle: distribution; concept or principle: laser energy; concept or principle: surface; concept or principle: workpiece; material: as; machanical property: density; process parameter: energy density