基于网络的指导型协作学习已广泛应用于教学实践中.在小组间开展竞争能促进协作学习,为了研究基于网络的组间竞争机制,给出了指导型协作学习三元组模型,提出了衡量学生亲和度与教师指导效率的方法；建立了指导型协作学习的组间竞争机制方程,以此促进学生在组间迁移,该方程包含的激励因子和抑制因子来调节组间竞争程度.随后描述了组间竞争的算法,通过实验模拟了组间竞争的过程,验证了算法有效性和自适应性.最后得到组间竞争模型能有效应用于基于网络的指导型协作学习教学实践.%Tutor-guided collaborative learning based on the network has been already widely applied into teaching practice. It was well known that reasonable competition among groups may improve learning efficiency. In order to research the competitive mechanism, firstly this paper presented a three-tuple of tutor-guided collaborative learning, and gave methods for calculating both learner affinity and tutor efficiency. Subsequently it built an equation for the collaborative learning, which aroused students to transfer among groups. In the equation both incentive factor were inhibiting factor were used to control competition degree among groups. After describing competitive mechanism algorithm, processes of competition among groups was simulated by a series of experiments, which verified the algorithm was available and adaptive. Finally it is concluded that the model can be applied into practice of tutor-guided collaborative learning based on the network.
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