Special issue on Julia?

I have some questions about publications in AES. I never make publication in Elseiver’s journals.
I have 4 original research. Those are in the field of Fixed Point based Non-Linear Adaptive Controllers. The hart of this type of controller is the Transformation function. I developed four new Transformation function. Each working on a SISO system. Then I generalized it to MIMO systems.
Some places the rule is to put the SISO and MIMO system into one paper. Some places prefer one paper for SISO solution and one for MIMO solution. In AES what is the preferred way?

If some places allowed to have exact same parts in two separated papers in the Introduction part (most are copy/paste). It is trivial the main part has to be original.
Some journals it is not allowed, this flagged as self-plagiarism (the reason is, the plagiarism checked by purely with a computer). What is the case in this Journal?

Can you approximately tell me the deadline? (One weak, One month…etc)? Basically, how many time I have?

Usually, in scientific papers, we don’t put any “implementation” part,
because this will be a Special Issue to celebrate Julia 1.0, maybe it is a good idea to put some key points into the paper, make a short section, how easy to do it in Julia.

There is some restriction on the size of the paper? (max, min value) ?