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建筑物和设施外露防雷引引下线防接触电压措施研究
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作者 严岩 郁国卿 +1 位作者 顾宇丹 黄建忠 《建筑电气》 2024年第10期52-55,共4页
分析3部现行国家标准中关于防雷引下线防接触电压的技术条文,研究人员可以接触到的外露引下线防接触电压措施;结合上海世博源这一实际工程案例,从安全可靠、经济合理、切实可行的角度出发,提出建筑物或设施外露防雷引下线防接触电压的... 分析3部现行国家标准中关于防雷引下线防接触电压的技术条文,研究人员可以接触到的外露引下线防接触电压措施;结合上海世博源这一实际工程案例,从安全可靠、经济合理、切实可行的角度出发,提出建筑物或设施外露防雷引下线防接触电压的措施要求。 展开更多
关键词 雷电 建筑物 设施 引下线 接触电压 防护措施 标准 世博源
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Set Relationships between Tourists' Authentic Perceptions and Authenticity of World Heritage Resources 被引量:2
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作者 陈享尔 蔡建明 +1 位作者 杨振山 Natasha WEBSTER 《Journal of Resources and Ecology》 CSCD 2014年第1期20-31,共12页
Tourists’ authentic perceptions are crucial for the development of world heritage resources. The paper focuses on exploring the relationships between tourists’ authentic perceptions and authenticity-based tourism de... Tourists’ authentic perceptions are crucial for the development of world heritage resources. The paper focuses on exploring the relationships between tourists’ authentic perceptions and authenticity-based tourism development of world heritage. Through the empirical study on the Forbidden City in Beijing, we find that the relationships between the above two factors can be simulated by the model of set theory in algebra. As a result, five types of set relationships are proposed: “separation relation”, “intersection relation”, “inclusion relation I”,“inclusion relation II” and “superposition relation”. According to sample distribution rules, the set relationships can be further divided into primary set relationships and secondary set relationships. The study on set relationships based on demographic characteristic of tourists by using two-way analysis of variance method shows that the tourists in different groups of gender, ages, levels of education, visit frequencies and levels of early perspectives have different perceptions for the set relationships. The ifndings in this paper are helpful for identifying effects of the authenticity-based exploitation of world heritage resources and proposing future strategies for world heritage resources from tourists’ authentic perspectives. 展开更多
关键词 set relationships tourists’ authentic perceptions authenticity-based development world heritage resources the Forbidden City
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