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通关安全检查系统的运作模式与仿真研究综述 被引量:5
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作者 王嘉宏 《计算机科学与应用》 2017年第11期1067-1078,共12页
由于近年来恐怖攻击事件频繁出现,如何优化安全检查机制成为国土安全管理的重要研究议题之一。本文综述了通关安全检查站的优化问题与计算机仿真建模,我们介绍海关通关安检系统运作模式的研究现状,并探索通关安全性与便利性之间的权衡... 由于近年来恐怖攻击事件频繁出现,如何优化安全检查机制成为国土安全管理的重要研究议题之一。本文综述了通关安全检查站的优化问题与计算机仿真建模,我们介绍海关通关安检系统运作模式的研究现状,并探索通关安全性与便利性之间的权衡问题。最后,文中还指出了未来几个潜在的研究方向。 展开更多
关键词 风险管理 计算机仿真 国土安全管理 优化
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Sustainable Nutrient Management in Chinese Agriculture: Challenges and Perspective 被引量:34
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作者 GAO Chao SUN Bo ZHANG Tao-Lin 《Pedosphere》 SCIE CAS CSCD 2006年第2期253-263,共11页
China has to raise agricultural productivity in its limited and shrinking farmland to guarantee food security for its huge and ever-growing population. Sustainable soil nutrient management is of paramount importance t... China has to raise agricultural productivity in its limited and shrinking farmland to guarantee food security for its huge and ever-growing population. Sustainable soil nutrient management is of paramount importance to the world's most populous country. Critical challenges the country is facing in sustaining soil fertility and in alleviating the hazardous impact of intensive fertilizer use are discussed in this paper. It is emphatically pointed out that national strategies as well as area-specific action plans with respect to scientific nutrient management are urgently needed to balance productivity and sustainability in the future. Relevant proposals for addressing those challenges are also presented. 展开更多
关键词 China food security nutrient management soil fertility water quality
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