What is the background, purpose, significance and development platform of online network examination system?

/portal/zaixiankaoshixitong (online examination system) The significance and realization of the construction of online examination system for higher education In today's information age, computer technology and network technology are more and more widely used in various fields, changing people's study, work, life and even way of thinking, and also causing major changes in the field of education. The application of computer and network technology in modern higher education is the need of the development of modern higher education, and it is also a necessary means to reform the educational model, improve the teaching effect and efficiency of the school, and improve the level of scientific research and management. At present, a development trend is to adopt the computer network examination mode of large-scale examination database. With the popularization of computer network in production, life and science and technology education, the traditional examination papers, answering methods and academic performance management are undergoing tremendous changes. Therefore, how to make the examination process convenient, efficient, fast and fair is an important subject of modern education. The online examination system is an extension of the traditional examination room. It can use the infinite space of the network to test students anytime and anywhere, and the use of database technology greatly simplifies the traditional examination process. Therefore, online examination system is an indispensable part of electronic teaching. There is a trend that standardization and computer networking have become the development direction of today's examinations. Nowadays, many international examination certifications, such as GRE and Cisco, are completed on computers. The paperless examination form has the advantages of being scientific, timely, accurate and fair, and has the advantages that the traditional examination form cannot be replaced and compared. 1. Comparison between traditional examination methods and online examination 1. The disadvantages of traditional examination form. The traditional examination method of "one paper for life" has the inherent deficiency of attaching importance to knowledge and ignoring ability, which has become the cradle of some students with "high scores and low abilities"; For another part of the students, they suffer from "test phobia" because of too much test pressure, or they are lucky and opportunistic. 2. The advantages of online examination based on information technology are: high confidentiality; Flexible examination time; Improve the teaching level of the school; The online examination system is not only an examination tool, but also a learning and analysis tool. The ultimate goal of online examination is not to get scores, but to let students know their own shortcomings and teachers know the next teaching focus through the examination. Therefore, it is essential to analyze the attributes of test questions and answers. Moreover, the examination system should allow teachers to set: whether to allow students to look at the test questions, whether to allow students to obtain answer analysis after answering questions, whether to time the examination, whether to score points, whether to allow students to obtain personal analysis results, class analysis results and so on. Immediately after the exam, let students know which knowledge points they have not mastered enough, which aspects need to be improved, which problems they can solve and which need the help of teachers. After the teacher got the statistical analysis report, he explained it according to the weak points of statistics. In addition, the examination system should have the function of summarizing and reporting statistical data, and all kinds of data will eventually become the basis for the decision-making of the education authorities. Second, the characteristics of the general examination system (1) to achieve no floppy disk, paperless examination. The test results are submitted directly and stored on the server, and no floppy disk is required. The test paper is also downloaded and displayed on the screen of the examinee's machine in real time, without rolling paper. (2) Good security: the system encrypts the network communication data, and replaces the simple way of selecting topics from the question bank with the way that the system randomly generates the test paper and the teacher manually chooses to modify the test paper, which can organize the test paper to examine the candidates more scientifically. The randomness of the test order can effectively prevent candidates from cheating; At the same time, the examination monitoring system and the examinee identity verification system are adopted to ensure the safety and fairness of the examination more effectively. (3) Effective invigilation. The system refuses other candidates to sign up for the exam with the same student number to ensure the uniqueness of the candidates; The system refuses the overtime candidates to register for the exam again to ensure the effectiveness of the exam; The invigilator can monitor on any networked machine and inquire about the examination status of candidates. (4) Good universality and expansibility: The item bank import system can convert the third-party item bank into the item bank format recognized by the system, which effectively enhances the expansibility of the item bank. Strictly divided by modules, leaving room for expansion and improvement. The universal design of the software makes the system more convenient for other disciplines to use. (5) High degree of automation: the automation of generating papers, marking papers and analyzing scores has been realized. (6) Strong accident handling ability: the test paper terminal, marking terminal and examination terminal all have catastrophic recovery function. For papers, grading papers or exams that cannot be conducted normally due to unexpected power failure or crash, they can be safely restored. The examination terminal can automatically repair abnormal network data transmission. (7) The interface design is reasonable and easy to use: A considerate examination interface design will make candidates more convenient. Electronic examination paper provides friendly interface settings, such as automatic time recording, reading the whole paper, choosing at will, marking papers, filtering questions, etc. The design of calculator and draft paper makes the examination process smoother. Everything is completely from the perspective of candidates, and strive to provide the best examination environment. (8) Powerful exercise function: The system not only provides the examination function, but also provides powerful exercise function, so that students can not only practice comprehensively, but also practice for specific subjects, specific chapters, specific difficulties and specific questions. The application of segmented practice guidance makes it easier for students to practice. (9) The examination/practice terminal uses the combination of keyboard and mouse input and handwriting input to answer questions, which speeds up the answering speed of candidates, and most importantly, it can integrate subjective questions that could not be realized by computers before. Greatly enhanced the flexibility of asking questions. (10) Fast results query, statistics and printing. After marking, students' individual scores, average scores, examination time and other information can be queried and counted according to their names and student numbers, and printed out. (1 1) Fast and transparent automatic marking. Candidates can score at any time and give their own test scores. Third, the design of general examination system For a general network examination system, we must overcome several main shortcomings of the previous computer examination. First, the question type is single. Because of the realization of computer examination and computer marking, the questions are usually objective, such as those that need to exert subjective analysis ability, which are basically impossible to achieve. Second, it is difficult to expand the question bank. Once the main format of the question bank is determined, it can not be compatible with other formats, and the ready-made question bank can not be used directly, which makes some published question banks-these high-quality resources can not be integrated and utilized. Third, the examination system has a single function and can only be used during the examination. Students usually do not practice, especially targeted exercises, which leads to idle teaching resources. In view of the above problems, this paper plans to design an online examination system with better security, stronger universality and expansibility, stronger accident handling ability, simple operation, convenient use, powerful practice function, diversified questions and certain auxiliary functions. This paper designs a set of distributed network software system based on Microsoft SQL server2000 database and TCP/IP Internet protocol, and its application range can be as small as a single PC and as large as the whole Internet. Different functional modules constitute different network terminals, and the core module that manages each terminal and database constitutes a system server, which is connected with the test database. Terminals and servers can be physically dispersed. Each terminal is finally connected to the central server through the network, and the system server performs all data operations (database operation, data transmission, data processing, etc.). ). This system adopts the traditional C/S (client/server) three-tier mode. Because of its mature security and operability, the above goals are easy to achieve. This system is divided into seven functional modules: examination terminal, system management terminal, teacher marking terminal, teacher writing terminal, student achievement management terminal, system server and test database. Each terminal is connected with the system server in a decentralized coupling manner. Adopting this software structure means that each terminal can be physically dispersed, the examination terminal can be arranged in the computer examination room, the examination terminal can be installed in each teacher's office or home, and the examinee management terminal can be arranged in the administrative office. A series of terminal clients are connected to the server through the Internet, and the server is responsible for communication between terminals, between terminals and servers, and between terminals and databases. The whole system integrates many functions, including test paper making, examination, marking and grading, item bank management, student management, academic performance management and so on. The examination system can be added and modified at will by the teacher, or directly linked to the ready-made question bank published by the third party; The examination terminal uses handwritten input to answer questions, which simplifies the answering methods of candidates and speeds up the answering speed of candidates. Handwritten answer method overcomes the shortcoming that computer objective test can not be combined with traditional subjective test, and unifies the answer method, which is one of the biggest characteristics of this software. The interface of each terminal adopts the popular Windows2000 interface style, which is concise and bright, simple and quick to operate, and can really be "stupid", with detailed instructions and operation guidelines. The system structure is shown in the following figure: The specific division of labor of each functional module is as follows: System management: it is used to manage and maintain system information, maintain system account number, password and authority, maintain candidates' personal information, back up test questions, import and export databases, establish system logs, set up network security, and ensure stable and reliable system operation. The database is used to store examination subjects and questions, and the item bank import is used to import the third-party item bank. Test paper terminal is used to generate and modify test papers, which can be freely composed according to a series of conditions such as test subjects, test quantity, test type, difficulty and so on. The content of the test paper is automatically generated, can be edited by hand twice, has its own typesetting function, can be printed directly, and is convenient for the traditional written test. The student management terminal is used to add, modify and delete student information, and at the same time contact the examination terminal to manage the examination process. The marking terminal is used for marking and grading test papers. The system can automatically identify answers, fill in the blanks, correct errors and choose. Candidates can grade their answers at any time, display their scores and save the scores in the database. The examination terminal is used for students' examinations/exercises. The examination interface is concise and clear, and the answer sheet is convenient and direct to operate. You can mark the answers for easy inspection. The technical platform of each functional module that can know the test results immediately when submitting the test paper: server: based on Microsoft Windows 2000 system, Microsoft Visual Basic 6.0 programming. Database: Based on Microsoft SQL Server 2000 (SP2) database. Each terminal: based on Microsoft Windows 98/ME/2000 system, programmed with Microsoft Visual Basic 6.0 or Borland Delphi 6.0. In the whole system, the server, the item bank import terminal and the system management terminal directly access the database through ADO interface, and other terminals are connected to the server through the network based on TCP/IP protocol and Windows Sockets programming technology. (Author: Wuzhou Normal University, Guangxi) The online examination platform has not been found! Excuse me!