With the near completion of Human Genome Project, life science has entered into the Post-Genome Era. In this era, the research mainly focuses on the functions and dynamics of the whole genome but not individual gene. This has given rise to a demand on the processing capability of a large quantity of biology information. DNA microarray (i.e. gene chip) technology is one of major marks of Post-Genome Era and primary research fields in Bioinformatics. By this technology, the expression level of tens of ...