Data Engineering Laboratory, Department of Computer and Information Sciences, Temple University, PA, USA. anli@temple.edu|Data Engineering Laboratory, Department of Computer and Information Sciences, Temple University, PA, USA. anli@temple.edu|Data Engineering Laboratory, Department of Computer and Information Sciences, Temple University, PA, USA. anli@temple.edu|Data Engineering Laboratory, Department of Computer and Information Sciences, Temple University, PA, USA. anli@temple.edu|Data Engineering Laboratory, Department of Computer and Information Sciences, Temple University, PA, USA. anli@temple.edu