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Relation between Economic Development Level and Resource and Environment Carrying Capacity of Central Area of Yunnan Province Based on Decoupling Analysis 被引量:4
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作者 程超 童绍玉 +2 位作者 彭海英 闫少凯 刘玲 《Agricultural Science & Technology》 CAS 2015年第12期2829-2832,共4页
Based on the decoupiing theory and method, an indicator system was built for the relation between economic development level and resource and environment carrying capacity. And the study was carried out on decoupling ... Based on the decoupiing theory and method, an indicator system was built for the relation between economic development level and resource and environment carrying capacity. And the study was carried out on decoupling degree and temporal changes of economic development level and resource and environment carrying ca- pacity in the central area of Yunnan Province. Results indicated that (i) the economic development level and resource and environment carrying capacity in the central area of Yunnan Province mainly experienced strong decoupling, weak decoupling, and ex- pansive negative coupling, and in general it was strong decoupling, and it took on re- verse "N" in temporal changes. (ii) Change rate of economic development level in the central area of Yunnan Province was greater than zero, but the amplitude of change was not large, while the change rate of resource and environment carrying capacity was negative in 2007-2008, and it was positive in the rest years; from 2007, it took on gradual expansion trend, and scissors difference gradually increased after experi- encing reverse "V" change. (iii) The strong decoupling was the main situation and it reached the peak value in T5 period and T6 pedod. 展开更多
关键词 The central area of Yunnan Province Economic development level re- source and environment carrying capacity Decoupling analysis Scissors difference
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小型侦察无人机任务能力及拒止距离分析 被引量:9
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作者 黄沛 曹国辉 +1 位作者 张海晶 张钧杰 《现代防御技术》 北大核心 2022年第1期1-6,共6页
随着无人机技术的快速发展,无人机已在民用、军事领域得到广泛应用。尤其是具有“低慢小”特征的小型无人机,使用方便灵活,成本相对低廉,可用于执行侦察监视、自杀袭击等任务,对日常防空安全、重要目标防护构成严重威胁。分析研究了小... 随着无人机技术的快速发展,无人机已在民用、军事领域得到广泛应用。尤其是具有“低慢小”特征的小型无人机,使用方便灵活,成本相对低廉,可用于执行侦察监视、自杀袭击等任务,对日常防空安全、重要目标防护构成严重威胁。分析研究了小型无人机主要威胁样式,重点分析了小型侦察无人机载荷任务能力,提出对该类目标拒止距离需求,可为相关拦截装备研制提供参考。 展开更多
关键词 反无人机 低慢小 拦截 防空 需求分析
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建筑结构抗震设计要求分析
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作者 张赛 《城市建筑》 2014年第33期49-49,共1页
《建筑抗震设计规范》中指出,通过应用抗震措施和抗震结构措施对建筑结构中的抗震性能进行保证,可以在一定程度上把延性要求进一步分为四个层次来对抗震不同要求进行满足。本文主要介绍的就是建筑结构抗震设计的要求。
关键词 建筑结构 抗震设计 要求分析
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