中人氏大學 数据与知识工程研究所 RENMIN UNIVERSITY OF CHINA Institute of Data and Know ledge Eng ineer ing Background knowledge Today' s PIM Great Opportunity and Great challenge The development of Store device and Internet Computing devices and l/o technologies The info-resource become richer and richer Development of R, DBMS, CHl, etc New problems and exacerbated old problems Information islands: in multiple versions Some Theory and application questions unsolved WDMWDM Today’s PIM: Great Opportunity and Great Challenge • The development of Store device and Internet • Computing Devices and I/O technologies • The info-resource become richer and richer • Development of IR,DBMS,CHI,etc. • New problems and exacerbated old problems • Information islands: in multiple versions • Some Theory and application questions unsolved Background Knowledge