第2期 LI Xining ,et al Dispatching mobile Agents for DDM applications ·187 tabase names,URLs,access modes,as well as [4]HASHMAN S,KNUDSEN S.The application of jini possible verification information.The database technology to enhance the delivery of mobile services. management module not only provides flexible in- [2001-12-01].http:/www.sun.com. [5 Salutation consortium,salutation architecture overview terface for accessing data,but also manipulates da- EB/OL ]1999-06-23 ]http /www.salutation.org/ tabase connections efficiently.At the current whitepaper stage,the database model in the IMA GO system is [6]Universal plug and play forum,UPnP?device architec- MySQL,the most popular open source DBMS sys- ture,version 1.0.1 EB/OL ][2006-911].http:// tem in the worldlis1. www.upnp-ic.org/resources/UPnP_device_architecture_ Research on the agent based DDM involves docs/. further extensions of the IMA GO system.First, [7]GUTTMAN E,PERKINS C,VEIZADESJ,et al.Serv- the current implementation of service discovery ice Location Protocol,Version 2[EB/OL ][1999-07- 21].http //www.ietf.org/rfc/rfc2608.txt. module deals with only a limited number of logical [8]OASIS EB/OL ]2005-10-27].http:/www.uddi. relationships.To be able to offer more precise dis- org. covery service,this module could be enhanced to [9]BOCCA J,DAHMENM M.FREESTON M,MACAR- parse some complex search criteria,such as condi- TNEY G,PEARSON P J.A Prolog for very large tional expressions and substring matching.Sec- knowledge bases [C]//Proceedings of the Seventh ondly,since databases may contain multi-dimen- British National Conference on Databases.Heriot-Watt sional data,retrieving such kind of information University,England,1990:163-184. [10]CERI S,GOTTLOB G,WIEDERHOLD G.Efficient from flat web pages is a pending problem.We are database access from prolog [J ]IEEE Transactions on looking to use XML meta-data to solve the data- Software Engineering,1989,15(2):153-164. base dimensional problem.In addition,we are [11 ]Quintus Inc.ProDBI,ODBC Interface for Quintus Pro- making investigations on adding more program- log Database,V.4.0[EB/OL ].[1997-06-18 ]http:// ming languages to the IMA GO system,as well as www.sics.se/. introducing more flexible and efficient communica- [12]SONG L,LI X,NI J.A database service discovery tion tools,such as mobile socket,to facilitate model for mobile Agents[J ]International Journal of In- DDM applications. telligent Information Technologies,2006,2(2)16-29. Acknowledgments.We would like to express [13]LI X,AUTRAN G.Interagent communication in MA GO prolog [J ]Lecture Notes in Artificial Intelli- our appreciation to the Natural Science and Engi- gence,2005:3346,163-180. neering Council of Canada and State Key Laborato- [14]FIPA ACL,Agent Communication Language Specifica- ry of Novel Software Technology (Nanjing Univer- tions,FIPA,2005:http //www.fipa.org,. sity)for supporting this research. [15]MySQL AB:MySQL 5.0 Reference Manual,MySQL Documentation Library EB/OL ]2008-01-03 ]ht- References tp://dev.mysql.com/doc/mysql/en/. [1]KLUSCH M,LODI S,MORO G.The role of Agents in 作者简介： distributed data mining:issues and benefits[Cl//IEEE LI Xi-ning was born in 1952.He is a WIC International Conference on Intelligent Agent Tech- professor of the Department of Computing nology.Halifax,Canada,2003:211-217. and Information Science at the University of Guelph and the director of the IMAGO [2]PARK B,KARGUPTA H.Distributed data mining:al- gorithms,systems,and applications[M].[S.1.]Law- Lab.His research interests include mobile rence Erlbaum Associates,2003:341-358. agent system,logic programming,and vir- tual machine implementation.He received a [3]BETTSTETTER C,RENNER C.A comparison of serv- PhD in computer science from the University of Calgary in ice discovery protocols and implementation of the service 1989.He has published 1 book,2 book chapters,and 70 location protocol [C]//Proc of EUNICE 2000.Twente, journal and conference papers. Netherlands,2000:13-15. 1994-2009 China Academic Journal Electronic Publishing House.All rights reserved.http://www.cnki.nettabase names , URL s , access modes , as well as possible verification information. The database management module not only provides flexible in2 terface for accessing data , but also manip ulates da2 tabase connections efficiently. At t he current stage , t he database model in the IMA GO system is MySQL , t he most pop ular open source DBMS sys2 tem in t he world [15 ] . Research on t he agent based DDM involves f urther extensions of t he IMA GO system. First , t he current implementation of service discovery module deals with only a limited number of logical relationship s. To be able to offer more precise dis2 covery service , t his module could be enhanced to parse some complex search criteria , such as condi2 tional expressions and sub2string matching. Sec2 ondly , since databases may contain multi2dimen2 sional data , retrieving such kind of information from flat web pages is a pending problem. We are looking to use XML meta2data to solve t he data2 base dimensional problem. In addition , we are making investigations on adding more program2 ming languages to the IMA GO system , as well as introducing more flexible and efficient communica2 tion tools , such as mobile socket , to facilitate DDM applications. Acknowledgments. We would like to express our appreciation to t he Nat ural Science and Engi2 neering Council of Canada and State Key Laborato2 ry of Novel Software Technology (Nanjing Univer2 sity) for supporting t his research. References : [1 ] KLUSCH M , LODI S ,MORO G. The role of Agents in distributed data mining : issues and benefits[ C]/ / IEEE WIC International Conference on Intelligent Agent Tech2 nology. Halifax , Canada , 2003 : 2112217. [2 ] PAR K B , KARGU PTA H. Distributed data mining : al2 gorithms , systems , and applications[ M ]. [ S. l. ] :Law2 rence Erlbaum Associates , 2003 :3412358. [ 3 ]BETTSTETTER C , RENN ER C. A comparison of serv2 ice discovery protocols and implementation of the service location protocol [ C]/ / Proc of EUNICE 2000. Twente , Netherlands , 2000 : 13215. [4 ] HASHMAN S , KNUDSEN S. The application of jini technology to enhance the delivery of mobile services. [2001212201 ]. http :/ / www. sun. com. [ 5 ] Salutation consortium , salutation architecture overview [ EB/ OL ]. [ 1999206223 ]. http :/ / www. salutation. org/ whitepaper. [6 ] Universal plug and play forum , U PnP ? device architec2 ture , version 1. 0. 1 [ EB/ OL ]. [ 200629211 ]. http :/ / www. upnp2ic. org/ resources/ U PnP_device_architecture_ docs/ . [ 7 ] GU TTMAN E , PER KINS C , VEIZADES J ,et al. Serv2 ice Location Protocol , Version 2 [ EB/ OL ]. [ 19992072 21 ]. http :/ / www. ietf. org/ rfc/ rfc2608. txt. [8 ] OASIS [ EB/ OL ]. [ 2005210227 ]. http :/ / www. uddi. org. [9 ]BOCCA J , DA HMENM M , FREESTON M , MACAR2 TN EY G, PEARSON P J. A Prolog for very large knowledge bases [ C ]/ / Proceedings of the Seventh British National Conference on Databases. Heriot2Watt University , England , 1990 : 1632184. [10 ] CERI S , GO TTLOB G, WIEDERHOLD G. Efficient database access from prolog [J ]. IEEE Transactions on Software Engineering , 1989 , 15 (2) : 1532164. [ 11 ]Quintus Inc. ProDBI , ODBC Interface for Quintus Pro2 log Database , V. 4. 0 [ EB/ OL ]. [ 1997206218 ]. http :/ / www. sics. se/ . [12 ] SON G L , L I X , NI J. A database service discovery model for mobile Agents[J ]. International Journal of In2 telligent Information Technologies , 2006 ,2 (2) 16229. [13 ] L I X , AU TRAN G. Inter2agent communication in I2 MA GO prolog [J ]. Lecture Notes in Artificial Intelli2 gence , 2005 :3346 ,1632180. [14 ]FIPA ACL , Agent Communication Language Specifica2 tions , FIPA , 2005 : http :/ / www.fipa. org ,. [15 ] MySQL AB : MySQL 5. 0 Reference Manual , MySQL Documentation Library [ EB/ OL ]. [ 2008201203 ]. ht2 tp :/ / dev. mysql. com/ doc/ mysql/ en/ . 作者简介 : L I Xi2ning was born in 1952. He is a professor of the Department of Computing and Information Science at the University of Guelph and the director of the IMA GO Lab. His research interests include mobile agent system , logic programming , and vir2 tual machine implementation. He received a PhD in computer science from the University of Calgary in 1989. He has published 1 book , 2 book chapters , and 70 journal and conference papers. 第 2 期 L I Xi2ning ,et al :Dispatching mobile Agents for DDM applications ·187 ·