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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">See answers below.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">-Yan<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> chipps-bounces@list.coin-or.org [mailto:chipps-bounces@list.coin-or.org]
<b>On Behalf Of </b>???<br>
<b>Sent:</b> Friday, February 24, 2012 2:50 AM<br>
<b>To:</b> chipps@list.coin-or.org<br>
<b>Cc:</b> geogrid@gmail.com<br>
<b>Subject:</b> [CHiPPS] Problem Of Node And Tree Selection And How To Define A Hybrid strategy<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Dear Professors, <o:p></o:p></p>
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<p class="MsoNormal"> First according to my understanding, when doing a tree search,
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<p class="MsoNormal"> Alps will firstly choose a sub tree, then process the nodes of this sub tree.<o:p></o:p></p>
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<p class="MsoNormal"> When this sub tree is fathom Alps will choose another sub tree.<o:p></o:p></p>
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<p class="MsoNormal"> So there have to be tree selection strategy and node selection strategy.<o:p></o:p></p>
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<p class="MsoNormal"> And for example, when we choose a sub tree using best-first,
<o:p></o:p></p>
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<p class="MsoNormal"> still, we can use depth-first to choose next node.<o:p></o:p></p>
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<p class="MsoNormal"> Am I right?<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">>> Right now , you have to change source code to do this (AlpsKnowledgeBroker.cpp).<o:p></o:p></span></p>
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<p class="MsoNormal"> But why the Hybrid strategy doesn`t have a tree selection strategy?<o:p></o:p></p>
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<p class="MsoNormal"> <span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">>> Because Hybrid’s tree strategy is the same as the Best first</span><o:p></o:p></p>
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<p class="MsoNormal"> Second, I am thinking about defining another Hybrid search strategy.
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<p class="MsoNormal"> Can you give me some suggestions on how to define it?<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">>> Follow the rules in files AlpSearchStrategy.h/cpp and AlpsKnowledgeBroker.cpp<o:p></o:p></span></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> May you best wishes.<o:p></o:p></p>
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