The Lookahead Study in Distributed Simulation of Timed Petri Nets;

Synthetic Supporting Reforms of the BNA currently has become the focus of all the parties, and it is prior to carry and try many new measures, but the old system still exists, so this reform is complicated and arduous.

The antecedent actions which can arouse obligations should cause the actual,particular and impendent danger to the legal interests.

There is dispute on whether antecedent actions are the source of act duty in omission crimes.

It is suitable for the act duty from antecedent actions to be stipulated separately in the general part of criminal law.

In the situation that first action is only legal action or illegal action,because it does not concern the problem of crime number,we can directly judge it according to criminal law.

Achievement of duty the advance behavior only can be the legal duty,cannot be the moral duty, otherwise, can expand the crime scope,violates the crime punishment legal principle.