In this thesis, multiagent system specifications, multiagent system architectures, agent communica-tion languages and agent communication protocols, automatic abstracting based on multiagent technolo-gies are studied.Some concerned problems of de-signs and realization of automatic abstracting sys-tems based on multiagent technologies are strdied, too.Chapter 1 shows the significance and objectives of the thesis, its main contents are summarized, and innovations of the thesis are showed.Some basic concepts of agents and multiagent systems are stud-ied in Chapter2.The definitions of agents and mul-tiagent systems are given, and the theory, technolo-gies and applications of multiagent systems are sum-marized .Furthermore, some important studying trends of multiagent systems are set forward.Multi-agent system specifications are strdied in Chapter30MAS/KIB-a multiagent system specification is built using mental states such as K(Know), B(Be-lief), and I(Intention), its grammar and seman-teme are discussed, axioms and inference rules are given, and some properties are researched.We also compare MAS/KIB with other existing specifica-tions.MAS/KIB has the following characteristicsL1)each agent has its own world outlood;(2)no global data in the system;(3)processes of state changes are used as indexes to systems;(4)it has the characteristics of not only time series logic but also dynamic logic;and (5) interactive actions are included.The architectures of multiagent systems are studied in Chapter 4.First, we review some typical architecture of multiagent systems, agent network architecture, agent federated architecture, agent blackboard architenture ,and Foundation of Intelligent Physical Agent(FIPA) architecture.For the first time, we set forward and study the layering and partitioning models of the architectures of multi-agent systems,organizing architecture models, and interoperability architecture model of multiagent sys-tems .Chapter 5 studies agent communication lan-guages.We study FIPA Agent Communication Lan-guage (ACL) message grammar, Communicative Act(CA)types, ACL semantics and Agent Communica-tion Protocols.The string grammar of ACL mes-tion Protocols.The string grammar of ACL mes-sages and SL grammar represented by EBNF are given, and a new ACL semantic model is set for-given, and a new ACL semantic model is set for-ward.We study automatic abstracting based on multiagent technologies in Chapter 6.For the first time, the idea of constructing automatic abstracting systems based on multiagent technologies is set for-ward, and the necessity and feasibility of construct-ing such systems are set forth.The architecture of automatic abstracting systems based on multiagent technologies is provided, and the basic elements and mutual relations are studied.We set forth the work-ing principle of the automatic abstracting systems based on multiagent technologies and how the con-tradiction of domain currency and abstract quality of automatic abstracting systems is resolved.Studies, simulation analysis and design of the automatic ab-stracting experimental system based on multiagent technologies(ABES/MAT) are made in Chapter7.We study the architecture of ABES/MAT, and set forth its basic elements and mutual relations.The user model and mathematics descriptions of ABES/MAT in the Internet environment are provided.Three coordination algorithms that synthetically use environment information, system information and history information are set forward.Then, we ana-lyze the performance of ABES/MAT based on the simulations, and get suitable number fo abstracting agents for each domain in a given load.Finally, we compare the three coordination algorithms.The re-alization of AMES/MAT is introduced in Chapter8.
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