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51.
基于博弈论的网上个体消费者诚信体系构建分析 总被引:1,自引:0,他引:1
诚信是电子商务健康发展的不二法则,网上个体消费者诚信危机也会影响到电子商务的有序发展。应用博弈论中的“囚徒困境”模型以及重复博弈理论分析了网上个体消费者在B2C、C2C中的诚信问题以及合作条件,并提出了构建网上个体消费者诚信体系的相关措施。 相似文献
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在矿井下发生安全事故后,及时准确地获知井下作业人员的位置信息是至关重要的。本文提出将ZigBee技术运用于煤矿井内定位系统中,组成无线传感器网络,构建井下人员无线定位系统的设计方案。 相似文献
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David Alan George Poh-Ling Tan Jeffrey Frank Clewett 《Environmental Education Research》2016,22(1):62-88
Using a participatory learning approach, we report on the delivery and evaluation of a climate change and risk assessment tool to help manage water risks within the agricultural sector. Post-graduate water-professional students from a range of countries, from both developed and emerging economies were involved in using this tool. Our approach included participative learning tools – group discussion, software, and risk matrices. The materials developed met the needs of the students, allowing these students to incorporate their learning and adapt the package of materials for use in their home countries. Analysis of evaluations show that the tools and materials are particularly useful and emphasizes the need for sound learning materials and tools, funding to deliver training, and policy support to accelerate education and adoption of authentic climate change adaptation practices. The expected benefits for water professionals about climate change will be translated into improved socioeconomic and environmental outcomes if adopted. 相似文献
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To alleviate teachers’ reluctance toward practical work, there has been much discussion on teachers’ pedagogical content knowledge, teaching materials, and failsafe strategies for practical work. Despite these efforts, practical work is still regarded as a challenging task for many elementary science teachers. To understand the complexity of teachers’ conflicts in practical work, this study examines teachers’ ideas about teaching and learning that influence teachers’ decision‐making and action on teaching practical work. More important than knowing technical–rational aspects of practical work is to understand the internal contradictions that teachers have to resolve within themselves regarding their capabilities and beliefs about science teaching and practical work. Using stories and experiences of 38 third‐year university students in a science method course in Korea, we seek to understand the conflicts and negotiations that they experience as they make decisions regarding practical work throughout their course. Reflective writings and group discussions on their lived experiences and concerns were used to probe participants’ ideas on teaching using practical work. From written and verbal data, themes were saturated in terms of the aspects which could (dis)encourage their practice. Results suggest that there are multifactorial challenges in pre‐service teachers’ understandings and concerns in practical work. Besides time, materials, and curriculum, pedagogical assumptions and values also compositely challenge the minds of teachers. As the pre‐service elementary teachers negotiated within themselves the importance of science in classroom and social levels, the question is raised about their identities as pre‐service elementary teachers to appreciate the balance between science teaching and practical work. 相似文献
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农村留守儿童问题研究:现状与前瞻 总被引:7,自引:0,他引:7
近年来,农村留守儿童问题已逐渐成为媒体和学术界关注的焦点。然而,目前的研究无论理论上还是实践中均显不足。本文梳理了不同学科在这一问题上的研究成果,揭示尚待研究的问题域。 相似文献
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谭德礼 《贵州教育学院学报》2005,21(6):12-14
人格是一个人的无价宝,是任何代价都不能换取的。健全的人格,主要是后天铸就的。它是人的全面发展的基础,又是人的全面发展的重要表现。健全人格教育是当代大学生全面发展的金钥匙。 相似文献