Study On Application Of Agent In Computer Adaptive Test System

As the development of networks , by teaching on network, E-education has got the opportunity of rapid developing. Based on network and other new technology, E-education maintains the merits as effective and low-cost, it conveys knowledge not only in text mode but also with chart and sound. So it can promote the effect, the method of teaching, build up the interaction during the course of teaching. After introduced technology of Artificial Intelligence, E-education gains its new form as Intelligent Teaching System. These new system can automatically change its teaching tactic, according to the behaves and habits the students shows in study to adapt itself, to students' way of thinking and the progress, thus it can more effectively fulfill its teaching task. These merits make E-education develop rapidly and become the main form of civil education and all-life education.However, compare with other taches both in content and method, network test,as an important tache of education, lagged greatly. Though considerable progress had been achieved, test method employed nowadays lack of scientific design and exoteric implement and advanced technique. It characterized as unitive test paper composed with unitive test questions which handed round in unitive test time and in unitive test place. The answered test paper was called back together and was checked by man labor, so the score are subjective instead of objective. The number of test questions in database is inadequate and cannot crown all the knowledge which need students to master. Unitive test questions are of the same difficulty that cannot reflect testees' real abilities, and also cannot grasp the difficulty and precision of test paper. Unitive time and place makes the scores of students greatly influenced by their fluctuate of mental, physiological condition and outside environments. All these demerits restrict E-education to be adopted extensively and hold back its development.With the view to actual condition of existing network test, after analyzed the main demerits, this paper introduced the Computer Adaptive Test into network test, efforts to make the test can be carried on in all possible time and possible place, and effort to make the process and the lasting time of test vary according to the ability of testees, to realize that all aspect of test be automatically adapt to the ability of different students. Considering the difficulty of fulfillment of CAT system, to solve the problem of conflict between accurate estimate and huge number of calculating, as a complex model withmulti-parameters employed, this paper bring forth the method of introducing agent technique into the CAT system. This introducing also aimed to guarantee the interaction and reliability of system.This paper mainly discusses CAT and Agent technology in details, and efforts on the idea, method and probable difficulties of their combination. After that, this paper discussed the analysis, design and fulfillment of some important modules of this system. Intelligent Agent is the main technique to fulfill this system, so in this paper, important emphases laid on the introduction of Agent range from its concept and characteristic to FIPA ACL message mechanism and collaboration mechanism of Multi-Agent system.In succession, this paper discusses related question about security of system, delivers the main thought to assure security of system in practice.Because of heavy workload and difficulties, after complete the analysis and design stage, there still many work to carry on. So, after summarize the key issue, main feature and deficiencies of this system, this paper brings forth the direction for further research and the later work.