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    <title>Forem: Theodore Tsitsimis</title>
    <description>The latest articles on Forem by Theodore Tsitsimis (@tsitsimis).</description>
    <link>https://forem.com/tsitsimis</link>
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      <title>Forem: Theodore Tsitsimis</title>
      <link>https://forem.com/tsitsimis</link>
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    <item>
      <title>Neural Network with Boolean Operators for Binary Classification</title>
      <dc:creator>Theodore Tsitsimis</dc:creator>
      <pubDate>Fri, 18 Sep 2020 14:22:41 +0000</pubDate>
      <link>https://forem.com/tsitsimis/neural-network-with-boolean-operators-for-binary-classification-19aa</link>
      <guid>https://forem.com/tsitsimis/neural-network-with-boolean-operators-for-binary-classification-19aa</guid>
      <description>&lt;p&gt;Implemented a novel type of Neural Network that emulates a Boolean Function in &lt;a href="https://en.wikipedia.org/wiki/Disjunctive_normal_form"&gt;Disjunctive Normal Form&lt;/a&gt; ("OR of ANDs") to perform binary classification.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://github.com/tsitsimis/disjunctive-normal-networks"&gt;Github Project&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href="https://res.cloudinary.com/practicaldev/image/fetch/s--fMp8ue-p--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://github.com/tsitsimis/disjunctive-normal-networks/blob/master/assets/spirals-experiments.png%3Fraw%3Dtrue" class="article-body-image-wrapper"&gt;&lt;img src="https://res.cloudinary.com/practicaldev/image/fetch/s--fMp8ue-p--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://github.com/tsitsimis/disjunctive-normal-networks/blob/master/assets/spirals-experiments.png%3Fraw%3Dtrue" alt=""&gt;&lt;/a&gt;&lt;/p&gt;

&lt;h1&gt;
  
  
  Overview
&lt;/h1&gt;

&lt;p&gt;Intuitively, in a 2D classification problem, the points of one class can be easily recognized by drawing polygons around them. This is like defining a boolean function that specifies the &lt;em&gt;union&lt;/em&gt; of parts of the plane belonging to this class.&lt;br&gt;
&lt;a href="https://res.cloudinary.com/practicaldev/image/fetch/s--oGsMKg6s--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://github.com/tsitsimis/disjunctive-normal-networks/blob/master/assets/polytopes.png%3Fraw%3Dtrue" class="article-body-image-wrapper"&gt;&lt;img src="https://res.cloudinary.com/practicaldev/image/fetch/s--oGsMKg6s--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://github.com/tsitsimis/disjunctive-normal-networks/blob/master/assets/polytopes.png%3Fraw%3Dtrue" alt=""&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Inspired by this intuition, the &lt;strong&gt;Disjunctive Normal Network&lt;/strong&gt; generalizes this concept in higher dimensions and finds the optimal polygons around the positive class of a binary classification problem.&lt;/p&gt;

&lt;p&gt;In a similar interpretation it divides the feature space in a similar way to a Decision Tree, but instead of axis-aligned rectangles it uses convex polygons.&lt;/p&gt;

&lt;h1&gt;
  
  
  Motivation
&lt;/h1&gt;

&lt;p&gt;I wanted to bring together concepts from Decision Trees and Neural Networks. Also it was a nice opportunity to learn how to properly set up (hopefully) a Python package with tests, CI, explanatory Notebooks and a helpful README.&lt;/p&gt;

&lt;p&gt;Any feedback is highly appreciated!&lt;/p&gt;

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      <category>showdev</category>
      <category>machinelearning</category>
      <category>python</category>
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