ucene, with customized query analyzer to handle entity queries.
        </li>
      </ul>
    </details>

    <details open>
      <summary>
        Twitter Recommendation System, Principle Researcher
        <time>2011 - 2012</time>
      </summary>
      <p>
        Built a personalized tweets recommendation system based on user profiles,
        achieved superior performance.
      </p>

      <ul>
        <li>
          Constructed user profiles by aggregating keywords in tweets and propagating interest