The Research Of Usefulness Of The Network Examination

For the equity and candor of the network examination, assurance the usefulness of examination result, this paper will carry on a research of three aspects on database construction, set book, test management. the set winding is a key, database construction and test management are the guarantee.At first, it introduces some item bank theories and connected terminology, including the basic characteristic and assignable requirements for the quality of test paper. The system can handle the item bank of various courses and different types of test questions. It can store and output test questions including graphs, images, tables, and formulae.The paper mainly deals with the process of selecting questions from an item bank and organizing a test paper, and points out difficulties confronted and ideas of coping with them, analyzes some strategies for test paper organizing based on these ideas. At last, considering the particular condition of a school, the paper decides on a strategy, describes its algorithm, and indicates the concrete source code for the key points of the algorithm. Based on this algorithm, the questions of a test paper can be distributed as evenly as possible according to different chapters. Based on this algorithm, repetition can be avoided to the best when more than one test paper needs to be generated, and at the same time, questions can be allotted reasonably and its difficulty degree up to standard. To say "to the best", it means that the system can employ a strategy which meets the organizing requirements to the best to ensure generating a complete paper, to the highest degree avoiding any failure of test paper organizing. Therefore, the efficiency of test paper organizing and the quality of the generated test paper improve a great deal. The paper also makes a test and analysis of the results from this algorithm.Finally, it introduces test management, main research the database and result safety, on the foundation of the research of numerical signature up, emphasize a discussion the database is received and dispatch both parties of mutually attestation and prevent from divulging a secret this problem, the adoption of attestation technique according to public key infrastructure(PKI) of the identity attestation, encrypt to adopt a 3DESs to encrypt calculate way, the adoption receive and dispatch the correspondence mode that both parties can't deny on this foundation. In order to promise the safety of result, put forward many management styles of result safety, in thus of the mode, each pulsed a natural cover for the safety, have combination of classes, available promise the safety of result.