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禁止还是拥抱:美国中小学应用生成式人工智能的划界与适切之道 被引量:2
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作者 但金凤 于泽元 《电化教育研究》 北大核心 2025年第4期106-113,共8页
生成式人工智能掀起了基础教育领域变革新浪潮。文章采用比较研究法和个案研究法,以智能技术驱动教与学实践的前沿国家——美国为研究对象,对美国中小学应用生成式人工智能的划界与适切之道进行分析。研究发现:生成式人工智能引发的学... 生成式人工智能掀起了基础教育领域变革新浪潮。文章采用比较研究法和个案研究法,以智能技术驱动教与学实践的前沿国家——美国为研究对象,对美国中小学应用生成式人工智能的划界与适切之道进行分析。研究发现:生成式人工智能引发的学业诚信危机、个体智慧退化风险、技术伦理安全隐患、教育鸿沟加剧等风险因素,使美国中小学对生成式人工智能技术作出不同回应,包括严令禁止、谨慎支持和积极拥抱。同时,美国依托顶层设计、夯实能力、弥合差距和营造氛围等手段,保障中小学合理使用生成式人工智能技术。借鉴美国中小学生成式人工智能应对经验,我国可从审度变革潜力、完善制度框架、开展专业培训、坚守公平底线等方面着手,推动中小学生成式人工智能应用实践落地。 展开更多
关键词 美国中小学 生成式人工智能 风险因素 应用划界 适切之道
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A dynamic model for railway freight overbooking 被引量:2
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作者 冯芬玲 张佳琪 郭晓峰 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第8期3257-3264,共8页
In order to apply overbooking idea in Chinese railway freight industry to improve revenue, a Markov decision process(dynamic programming) model for railway freight reservation was formulated and the overbooking limit ... In order to apply overbooking idea in Chinese railway freight industry to improve revenue, a Markov decision process(dynamic programming) model for railway freight reservation was formulated and the overbooking limit level was proposed as a control policy. However, computing the dynamic programming treatment needs six nested loops and this will be burdensome for real-world problems. To break through the calculation limit, the properties of value function were analyzed and the overbooking protection level was proposed to reduce the calculating quantity. The simulation experiments show that the overbooking protection level for the lower-fare class is higher than that for the higher-fare class, so the overbooking strategy is nested by fare class. Besides, by analyzing the influence on the overbooking strategy of freight arrival probability and cancellation probability, the proposed approach is efficient and also has a good application prospect in reality. Also, compared with the existing reservation(FCFS), the overbooking strategy performs better in the fields of vacancy reduction and revenue improvement. 展开更多
关键词 revenue management railway freight OVERBOOKING dynamic model
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