Erqian Tang PhD candidate / guest Name Mr. E. Tang MSc Telephone +31 71 527 7491 E-mail e.tang@liacs.leidenuniv.nl PhD candidate / guest Science Leiden Inst of Advanced Computer Science Work address Snellius Niels Bohrweg 1 2333 CA Leiden Room number 145a Contact +31 71 527 7491 e.tang@liacs.leidenuniv.nl Publications