poolings.html



<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    
    <title>Poolings &#8212; PaddlePaddle  documentation</title>
    
    <link rel="stylesheet" href="../../../_static/classic.css" type="text/css" />
    <link rel="stylesheet" href="../../../_static/pygments.css" type="text/css" />
    
    <script type="text/javascript">
      var DOCUMENTATION_OPTIONS = {
        URL_ROOT:    '../../../',
        VERSION:     '',
        COLLAPSE_INDEX: false,
        FILE_SUFFIX: '.html',
        HAS_SOURCE:  true
      };
    </script>
    <script type="text/javascript" src="../../../_static/jquery.js"></script>
    <script type="text/javascript" src="../../../_static/underscore.js"></script>
    <script type="text/javascript" src="../../../_static/doctools.js"></script>
    <script type="text/javascript" src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
    <link rel="index" title="Index" href="../../../genindex.html" />
    <link rel="search" title="Search" href="../../../search.html" />
    <link rel="top" title="PaddlePaddle  documentation" href="../../../index.html" />
    <link rel="up" title="Model Config Interface" href="index.html" />
    <link rel="next" title="Networks" href="networks.html" />
    <link rel="prev" title="Activations" href="activations.html" /> 
<script>
var _hmt = _hmt || [];
(function() {
  var hm = document.createElement("script");
  hm.src = "//hm.baidu.com/hm.js?b9a314ab40d04d805655aab1deee08ba";
  var s = document.getElementsByTagName("script")[0]; 
  s.parentNode.insertBefore(hm, s);
})();
</script>

  </head>
  <body role="document">
    <div class="related" role="navigation" aria-label="related navigation">
      <h3>Navigation</h3>
      <ul>
        <li class="right" style="margin-right: 10px">
          <a href="../../../genindex.html" title="General Index"
             accesskey="I">index</a></li>
        <li class="right" >
          <a href="../../../py-modindex.html" title="Python Module Index"
             >modules</a> |</li>
        <li class="right" >
          <a href="networks.html" title="Networks"
             accesskey="N">next</a> |</li>
        <li class="right" >
          <a href="activations.html" title="Activations"
             accesskey="P">previous</a> |</li>
        <li class="nav-item nav-item-0"><a href="../../../index.html">PaddlePaddle  documentation</a> &#187;</li>
          <li class="nav-item nav-item-1"><a href="../../index.html" >User Interface</a> &#187;</li>
          <li class="nav-item nav-item-2"><a href="index.html" accesskey="U">Model Config Interface</a> &#187;</li> 
      </ul>
    </div>  

    <div class="document">
      <div class="documentwrapper">
        <div class="bodywrapper">
          <div class="body" role="main">
            
  <div class="section" id="poolings">
<h1>Poolings<a class="headerlink" href="#poolings" title="Permalink to this headline">¶</a></h1>
<div class="section" id="basepoolingtype">
<h2>BasePoolingType<a class="headerlink" href="#basepoolingtype" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">paddle.trainer_config_helpers.poolings.</code><code class="descname">BasePoolingType</code><span class="sig-paren">(</span><em>name</em><span class="sig-paren">)</span></dt>
<dd><p>Base Pooling Type.
Note these pooling types are used for sequence input, not for images.
Each PoolingType contains one parameter:</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><strong>name</strong> (<em>basestring</em>) &#8211; pooling layer type name used by paddle.</td>
</tr>
</tbody>
</table>
</dd></dl>

</div>
<div class="section" id="avgpooling">
<h2>AvgPooling<a class="headerlink" href="#avgpooling" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">paddle.trainer_config_helpers.poolings.</code><code class="descname">AvgPooling</code><span class="sig-paren">(</span><em>strategy='average'</em><span class="sig-paren">)</span></dt>
<dd><p>Average pooling.</p>
<p>Return the average values for each dimension in sequence or time steps.</p>
<div class="math">
\[sum(samples\_of\_a\_sequence)/sample\_num\]</div>
</dd></dl>

</div>
<div class="section" id="maxpooling">
<h2>MaxPooling<a class="headerlink" href="#maxpooling" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">paddle.trainer_config_helpers.poolings.</code><code class="descname">MaxPooling</code><span class="sig-paren">(</span><em>output_max_index=None</em><span class="sig-paren">)</span></dt>
<dd><p>Max pooling.</p>
<p>Return the very large values for each dimension in sequence or time steps.</p>
<div class="math">
\[max(samples\_of\_a\_sequence)\]</div>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><strong>output_max_index</strong> (<em>bool|None</em>) &#8211; True if output sequence max index instead of max
value. None means use default value in proto.</td>
</tr>
</tbody>
</table>
</dd></dl>

</div>
<div class="section" id="sumpooling">
<h2>SumPooling<a class="headerlink" href="#sumpooling" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">paddle.trainer_config_helpers.poolings.</code><code class="descname">SumPooling</code></dt>
<dd><p>Sum pooling.</p>
<p>Return the sum values of each dimension in sequence or time steps.</p>
<div class="math">
\[sum(samples\_of\_a\_sequence)\]</div>
</dd></dl>

</div>
<div class="section" id="squarerootnpooling">
<h2>SquareRootNPooling<a class="headerlink" href="#squarerootnpooling" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">paddle.trainer_config_helpers.poolings.</code><code class="descname">SquareRootNPooling</code></dt>
<dd><p>Square Root Pooling.</p>
<p>Return the square root values of each dimension in sequence or time steps.</p>
<div class="math">
\[sum(samples\_of\_a\_sequence)/sqrt(sample\_num)\]</div>
</dd></dl>

</div>
</div>


          </div>
        </div>
      </div>
      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
        <div class="sphinxsidebarwrapper">
  <h3><a href="../../../index.html">Table Of Contents</a></h3>
  <ul>
<li><a class="reference internal" href="#">Poolings</a><ul>
<li><a class="reference internal" href="#basepoolingtype">BasePoolingType</a></li>
<li><a class="reference internal" href="#avgpooling">AvgPooling</a></li>
<li><a class="reference internal" href="#maxpooling">MaxPooling</a></li>
<li><a class="reference internal" href="#sumpooling">SumPooling</a></li>
<li><a class="reference internal" href="#squarerootnpooling">SquareRootNPooling</a></li>
</ul>
</li>
</ul>

  <h4>Previous topic</h4>
  <p class="topless"><a href="activations.html"
                        title="previous chapter">Activations</a></p>
  <h4>Next topic</h4>
  <p class="topless"><a href="networks.html"
                        title="next chapter">Networks</a></p>
  <div role="note" aria-label="source link">
    <h3>This Page</h3>
    <ul class="this-page-menu">
      <li><a href="../../../_sources/ui/api/trainer_config_helpers/poolings.txt"
            rel="nofollow">Show Source</a></li>
    </ul>
   </div>
<div id="searchbox" style="display: none" role="search">
  <h3>Quick search</h3>
    <form class="search" action="../../../search.html" method="get">
      <div><input type="text" name="q" /></div>
      <div><input type="submit" value="Go" /></div>
      <input type="hidden" name="check_keywords" value="yes" />
      <input type="hidden" name="area" value="default" />
    </form>
</div>
<script type="text/javascript">$('#searchbox').show(0);</script>
        </div>
      </div>
      <div class="clearer"></div>
    </div>
    <div class="related" role="navigation" aria-label="related navigation">
      <h3>Navigation</h3>
      <ul>
        <li class="right" style="margin-right: 10px">
          <a href="../../../genindex.html" title="General Index"
             >index</a></li>
        <li class="right" >
          <a href="../../../py-modindex.html" title="Python Module Index"
             >modules</a> |</li>
        <li class="right" >
          <a href="networks.html" title="Networks"
             >next</a> |</li>
        <li class="right" >
          <a href="activations.html" title="Activations"
             >previous</a> |</li>
        <li class="nav-item nav-item-0"><a href="../../../index.html">PaddlePaddle  documentation</a> &#187;</li>
          <li class="nav-item nav-item-1"><a href="../../index.html" >User Interface</a> &#187;</li>
          <li class="nav-item nav-item-2"><a href="index.html" >Model Config Interface</a> &#187;</li> 
      </ul>
    </div>
    <div class="footer" role="contentinfo">
        &#169; Copyright 2016, PaddlePaddle developers.
      Created using <a href="http://sphinx-doc.org/">Sphinx</a> 1.4.9.
    </div>
  </body>
</html>