<div>Dear professors,</div>
<div> I am studying node-selection of BB now.</div>
<div> But I am not really understand the method of hybrid that implemented in ALPS.</div>
<div> For example, what is the difference of node pool, diving node pool, active node?</div>
<div> I hope you could explain it to me.</div>
<div> Hope You All The Best!</div>