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BIM技术的应用 被引量:4
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作者 王艺瑶 《江西建材》 2012年第5期18-19,共2页
现代建筑设计的发展过程是一个不断改变,不断进化,不断完善的艰难历程。原CAD等二维模式下的建筑设计手段早已不能实现许多建筑的非线性和超高层及超大跨度等特点,传统的建筑设计方式必将淘汰。现在设计者贯彻信息模型理念已显得极为重... 现代建筑设计的发展过程是一个不断改变,不断进化,不断完善的艰难历程。原CAD等二维模式下的建筑设计手段早已不能实现许多建筑的非线性和超高层及超大跨度等特点,传统的建筑设计方式必将淘汰。现在设计者贯彻信息模型理念已显得极为重要。BIM技术的将使对建筑设计业发生翻天覆地的变化,形成一次前所未有的信息革命。 展开更多
关键词 建筑设计方式 可持续设计 工程 效果一致 BIM技术
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外部性的经济分析与对策──评科斯与庇古思路的效果一致性 被引量:9
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作者 刘红 唐元虎 《南开经济研究》 CSSCI 北大核心 2001年第1期45-48,共4页
外部性是一种经常出现的经济现象。外部性的存在意味着资源的非帕累托最优配置,克服外部性始终是一个十分棘手而又重要的问题。庇古认为,应该通过政府出面,以税收和补贴的方式解决;科斯则从产权界定和交易出发,提出应以市场的方式... 外部性是一种经常出现的经济现象。外部性的存在意味着资源的非帕累托最优配置,克服外部性始终是一个十分棘手而又重要的问题。庇古认为,应该通过政府出面,以税收和补贴的方式解决;科斯则从产权界定和交易出发,提出应以市场的方式解决。本文认为,对外部性的解决,应该以政府边际交易费用和市场边际交易费用的相对大小出发,提出相应的解决方案;在零交易费用情况下,科斯与庇古的思路具有效果一致性。 展开更多
关键词 外部性 边际交易费用 效果一致 科思定理 零交易费用 私人成本 社会成本
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Establishment of one-step approach to detoxification of hypertoxic aconite based on the evaluation of alkaloids contents and quality 被引量:9
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作者 ZHANG Ding-Kun HAN Xue +6 位作者 TAN Peng LI Rui-Yu NIU Ming ZHANG Cong-En WANG Jia-Bo YANG Ming XIAO Xiao-He 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2017年第1期49-61,共13页
Aconite is a valuable drug and also a toxic material, which can be used only after detoxification processing. Although traditional processing methods can achieve detoxification effect as desired, there are some obviou... Aconite is a valuable drug and also a toxic material, which can be used only after detoxification processing. Although traditional processing methods can achieve detoxification effect as desired, there are some obvious drawbacks, including a significant loss of alkaloids and poor quality consistency. It is thus necessary to develop a new detoxification approach. In the present study, we designed a novel one-step detoxification approach by quickly drying fresh-cut aconite particles. In order to evaluate the technical advantages, the contents of mesaconitine, aconitine, hypaconitine, benzoylmesaconine, benzoylaconine, benzoylhypaconine, neoline, fuziline, songorine, and talatisamine were determined using HPLC and UHPLC/Q-TOF-MS. Multivariate analysis methods, such as Clustering analysis and Principle component analysis, were applied to determine the quality differences between samples. Our results showed that traditional processes could reduce toxicity as desired, but also led to more than 85.2% alkaloids loss. However, our novel one-step method was capable of achieving virtually the same detoxification effect, with only an approximately 30% alkaloids loss. Cluster analysis and Principal component analysis analyses suggested that Shengfupian and the novel products were significantly different from various traditional products. Acute toxicity testing showed that the novel products achieved a good detoxification effect, with its maximum tolerated dose being equivalent to 20 times of adult dosage. And cardiac effect testing also showed that the activity of the novel products was stronger than that of traditional products. Moreover, particles specification greatly improved the quality consistency of the novel products, which was immensely superior to the traditional products. These results would help guide the rational optimization of aconite processing technologies, providing better drugs for clinical treatment. 展开更多
关键词 ACONITE Detoxication methods Quantitative determination Cardiac effect Quality consistency.
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