The modular structure (eq. 7) presented in figure
2 actually runs simultaneously N different outputs
corresponding to the N first order LIFs. At each time and for any
value of the delay, we are free to chose the most appropriate order
for the LIF without any extra computation. Furthermore, for each value
of delay, two different LIFs, resp. order 
and order 
, verify
relation 11. Thus, we can keep the same parity order in
any case (see section 3.4 for the parity order influence
in LIFs). The order of the LIF is dynamically adapted to the most
appropriate one by connecting or deconnecting appropriate modules from
the global structure.