which parameters can affect the transimission curve?

[fanjiaping]

        hello ,everybody!
       when I reproduce the transimission curve obtained from the paper,there are some differences between the one I picked and the one the paper given.So I want to know which parameters can affect the transimission curve.
      thank you

[zh]

It is hard to give an exact answer to your question, because too many parameters can affect the calculated results.

1) the geometry configuration;
2) mesh cut-off;
3) size of k-grid;
and so on.