I'm writing a paper to describe my methods that are borrowed from other's models.
I think both the past and present tense are possible.
I can use present tense as I'm explaining it now.
However, we use only programming languages and programming paradigms for selecting programming model examples. Specifically, we choose two ...
Also, I can use the past tense as I've already used and chose something before writing the paper.
However, we used only programming languages and programming paradigms for selecting programming model examples. Specifically, we chose two ...
Which is correct or better?
ADDED
I chose to use the present tense in my paper as the sentences are in an introduction to describe details later.
However, we use only programming languages and programming paradigms for selecting programming model examples. Specifically, we choose two programming languages--Lisp and Forth--and two programming paradigms--Object Oriented and Functional--as examples of successful programming models. We analyze them to understand what elements enable these languages or paradigms, passing the test of time to be used widely and solving problems in many domains.
I assume that present tense is possible as this is a CS paper, if this is a Chemistry paper that explains my or other's past experiments, I kinda feel I need to write in the past tense.