课程难度系数p用来描述该课程的难度状况，p值越大，代表课程的难度越大。p的取值来自对选学该门功课的学生得分的统计，与具体的学生无关，仅取决于课程本身。
4) 具体实现
学习内容用c表示，该课程计划的内容用c0表示；学生测试得分用l表示，该课程的期望分数值用l0表示：
c=c0 / (wp)
w=(l/l0)*(1/p)
5) 系统的工作过程描述
i. 取学生对功课s的接受程度w和进度m；
ii. 根据m从课件库中提取课件元素，并根据w的值组织内容；
iii. 学生通过与系统交互，进行学习；
iv. 学生进行测验，根据得分调节w值；
v. 继续下一阶段的学习，重复ⅰ--ⅳ；
4. 总结
本文提出了一种自适应的远程教学模式，并给出了实现的主要方法。该模式充分利用互联网的交互性和计算机的认知能力，使得教学更有针对性，能够找出学生学习过程中的薄弱环节，并能根据学生对知识的接受状况动态调整学习进度，从而实现了"家庭教师"式的教学方式。
本文对远程教学的方法与模式进行了有益的探索。随着整个网络技术、计算机技术、信息技术和教育理论的发展，未来的网上教育将是个性化的、有针对性的教学，可以预见，个性化的教育模式将为网络远程教育注入新的活力。
参考文献
1) 周明天 《tcp/ip网络原理与技术》 清华大学出版社 1996
2) cernet的研究与发展，科学出版社 1999.10
3) lucent technology cedl(the center for excellence in distance learning) http://www.lucent.com/cedl
4) illinois online network (ion)
http://illinois.online.uillinois.edu/ionresources/index.html
research on adaptive remote education mode
based on computer network
huang yangcheng1 chenying2 cao jiuxin1 zhang deyun1
1(network institute , xi'an jiaotong university, 710049 , xi'an china)
2(software institute , xi'an jiaotong university, 710049 , xi'an china)
abstract
as we approach the twenty-first century, corporations are facing a growing need for more training and education and a similar need for more efficient and cost-effective delivery of this training. 75% of the existing workforce will need retraining in the next 10 years. to meet these demands, efficient training solutions must be developed rapidly. whether for formal education, continuing professional development, or for employee training or retraining, remote education solutions needs to deliver the right kind of educational content to learners - anytime, anywhere. nowadays with the development of network technology, remote education networks make training and advanced education possible in cases where time and budgetary constraints make it difficult to organize face-to-face training.remote education networks is a seamless networked learning environment that integrates voice, video, and data connections among learners, instructors, experts, virtual libraries, the internet, and support services. remote education system mainly consists of six components: remote learning system,remote questioning system,remote examination system,remote homework system,remote communication system,remote management system..
however current remote education has some shortcomings.it only emphasizes network's function of transfering teaching contents and neglects the improvement of teaching performance.it can not suit a special student.that is,it is not student-centered but teacher-centered.this cannot meet the need of modern education and cannot receive good teaching performance.remote education must be student-centered,and focus on improve the teaching methods. interaction is the most powerful way to engage learners. the instructor needs to design opportunities for inter-site and intra-site interactions among learners, at a minimum of about every twenty minutes. question-and-answer periods, brainstorming sessions, case discussions, and role-playing exercise are examples of strategies the instructor can use to stimulate interaction.
this paper analyzes the main characteristics of modern education system and the development of remote education.a new adaptive student- centered networked education mode is presented.this mode makes full use of the interactiveity of the computer network.teaching is based on the student's ability of accepting knowledge.according to the mode,remote education system can learn the study status of the student,and adjust the learning speed and the quality of the course to meet the need of the student.
after a stage of study,student will have a test to check the performance of study.if the score of some knowledge point is too low,the system will emphasize this knowledge point at the next learning stage, and slow down the learning speed.on the contrary,the system can also increase contents and the difficulty level of the course.
the key technology includes:
l the orgination of courseware
the courseware is devided into many courseware elements.every element is a basic unit of the course.and courseware elements are put in a "courseware container" .
l the evaluation of a student's learning progress
a parameter is used to measure a student 's learning progress.it is set according to the score of the test.the value is changed with the learning progress.
l the evaluation of a course
every course has a constant to evalute its difficult level.it is set according to statistics.
the technique details have been illustrated in the paper.
