r<br>
      <span style="font-style: italic;">greedy </span>- greedy method
based on minimizing cuts<br>
      <span style="font-style: italic;">auto </span>- automatically
select from the above methods (in parallel, the processes will do
different methods)<br>
      </td>
    </tr>
    <tr>
      <td style="vertical-align: top;">&nbsp;&nbsp;&nbsp; <span
 style="font-style: italic;">PHG_REFINEMENT_METHOD</span><br>
      </td>
      <td style="vertical-align: top;">Refinement algorithm:<br>
&nbsp;<span styl