[CHiPPS] Problem Of Node And Tree Selection And How To Define A Hybrid strategy

[化高峰]

Dear Professors,
       First according to my understanding, when doing a tree search,
       Alps will firstly choose a sub tree, then process the nodes of this
sub tree.
       When this sub tree is fathom Alps will choose another sub tree.
       So there have to be tree selection strategy and node selection
strategy.
       And for example, when we choose a sub tree using best-first,
       still, we can use depth-first to choose next node.
       Am I right?
       But why the Hybrid strategy doesn`t have a tree selection strategy?

       Second, I am thinking about defining another Hybrid search strategy.
       Can you give me some suggestions on how to define it?

   May you best wishes.
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