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class="descname">Abs</code></dt> <dd><p>Abs Activation.</p> <p>Forward: <span class="math">\(f(z) = abs(z)\)</span></p> <p>Derivative:</p> <div class="math"> \[\begin{split}1 &\quad if \quad z > 0 \\ -1 &\quad if \quad z < 0 \\ 0 &\quad if \quad z = 0\end{split}\]</div> </dd></dl> </div> <div class="section" id="exp"> <h2>Exp<a class="headerlink" href="#exp" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">Exp</code></dt> <dd><p>Exponential Activation.</p> <div class="math"> \[f(z) = e^z.\]</div> </dd></dl> </div> <div class="section" id="identity"> <h2>Identity<a class="headerlink" href="#identity" title="永久链接至标题">¶</a></h2> <dl class="attribute"> <dt> <code class="descclassname">paddle.v2.activation.</code><code class="descname">Identity</code></dt> <dd><p><code class="xref py py-class docutils literal"><span class="pre">Linear</span></code> 的别名</p> </dd></dl> </div> <div class="section" id="linear"> <h2>Linear<a class="headerlink" href="#linear" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">Linear</code></dt> <dd><p>Identity Activation.</p> <p>Just do nothing for output both forward/backward.</p> </dd></dl> </div> <div class="section" id="log"> <h2>Log<a class="headerlink" href="#log" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">Log</code></dt> <dd><p>Logarithm Activation.</p> <div class="math"> \[f(z) = log(z)\]</div> </dd></dl> </div> <div class="section" id="square"> <h2>Square<a class="headerlink" href="#square" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">Square</code></dt> <dd><p>Square Activation.</p> <div class="math"> \[f(z) = z^2.\]</div> </dd></dl> </div> <div class="section" id="sigmoid"> <h2>Sigmoid<a class="headerlink" href="#sigmoid" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">Sigmoid</code></dt> <dd><p>Sigmoid activation.</p> <div class="math"> \[f(z) = \frac{1}{1+exp(-z)}\]</div> </dd></dl> </div> <div class="section" id="softmax"> <h2>Softmax<a class="headerlink" href="#softmax" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">Softmax</code></dt> <dd><p>Softmax activation for simple input</p> <div class="math"> \[P(y=j|x) = \frac{e^{x_j}} {\sum^K_{k=1} e^{x_j} }\]</div> </dd></dl> </div> <div class="section" id="sequencesoftmax"> <h2>SequenceSoftmax<a class="headerlink" href="#sequencesoftmax" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">SequenceSoftmax</code></dt> <dd><p>Softmax activation for one sequence. The dimension of input feature must be 1 and a sequence.</p> <div class="code python highlight-default"><div class="highlight"><pre><span></span><span class="n">result</span> <span class="o">=</span> <span class="n">softmax</span><span class="p">(</span><span class="k">for</span> <span class="n">each_feature_vector</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="ow">in</span> <span class="n">input_feature</span><span class="p">)</span> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">each_time_step_output</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">output</span><span class="p">):</span> <span class="n">each_time_step_output</span> <span class="o">=</span> <span class="n">result</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> </pre></div> </div> </dd></dl> </div> <div class="section" id="relu"> <h2>Relu<a class="headerlink" href="#relu" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">Relu</code></dt> <dd><p>Relu activation.</p> <p>forward. <span class="math">\(y = max(0, z)\)</span></p> <p>derivative:</p> <div class="math"> \[\begin{split}1 &\quad if z > 0 \\ 0 &\quad\mathrm{otherwize}\end{split}\]</div> </dd></dl> </div> <div class="section" id="brelu"> <h2>BRelu<a class="headerlink" href="#brelu" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">BRelu</code></dt> <dd><p>BRelu Activation.</p> <p>forward. <span class="math">\(y = min(24, max(0, z))\)</span></p> <p>derivative:</p> <div class="math"> \[\begin{split}1 &\quad if 0 < z < 24 \\ 0 &\quad \mathrm{otherwise}\end{split}\]</div> </dd></dl> </div> <div class="section" id="softrelu"> <h2>SoftRelu<a class="headerlink" href="#softrelu" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">SoftRelu</code></dt> <dd><p>SoftRelu Activation.</p> </dd></dl> </div> <div class="section" id="tanh"> <h2>Tanh<a class="headerlink" href="#tanh" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">Tanh</code></dt> <dd><p>Tanh activation.</p> <div class="math"> \[f(z)=tanh(z)=\frac{e^z-e^{-z}}{e^z+e^{-z}}\]</div> </dd></dl> </div> <div class="section" id="stanh"> <h2>STanh<a class="headerlink" href="#stanh" title="永久链接至标题">¶</a></h2> <dl class="class"> <dt> <em class="property">class </em><code class="descclassname">paddle.v2.activation.</code><code class="descname">STanh</code></dt> <dd><p>Scaled Tanh Activation.</p> <div class="math"> \[f(z) = 1.7159 * tanh(2/3*z)\]</div> </dd></dl> </div> </div> </div> </div> <footer> <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> <a href="layer.html" class="btn btn-neutral float-right" title="Layers" accesskey="n">Next <span class="fa fa-arrow-circle-right"></span></a> <a href="../model_configs.html" class="btn btn-neutral" title="Model Configuration" accesskey="p"><span class="fa fa-arrow-circle-left"></span> Previous</a> </div> <hr/> <div role="contentinfo"> <p> © Copyright 2016, PaddlePaddle developers. </p> </div> Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. </footer> </div> </div> </section> </div> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT:'../../../', VERSION:'', COLLAPSE_INDEX:false, FILE_SUFFIX:'.html', HAS_SOURCE: true, SOURCELINK_SUFFIX: ".txt", }; </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="../../../_static/translations.js"></script> <script type="text/javascript" src="https://cdn.bootcss.com/mathjax/2.7.0/MathJax.js"></script> <script type="text/javascript" src="../../../_static/js/theme.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script> <script src="https://cdn.jsdelivr.net/perfect-scrollbar/0.6.14/js/perfect-scrollbar.jquery.min.js"></script> <script src="../../../_static/js/paddle_doc_init.js"></script> </body> </html>