the aumented U12 formulation

[zyl1336110861]

@lliuz
Hello, Sir. Thanks for your sharing. When I read your paper, I find the following formula is hard to understand for me. I want to know whether the tao_theta in the second formula should be the inverse of tao_theta? Thank you very much!

[Liang Liu]

yes, thanks for pointing it out this mistake and I will revise it in arxiv.
and the code is correct, you can refer to #4