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激光熔覆金属粉末直接制造砂型铸造模具的探讨 被引量:4
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作者 刘继常 李力钧 鄢锉 《激光技术》 CAS CSCD 北大核心 2003年第6期572-576,共5页
探讨了激光熔覆金属粉末快速原型技术直接制造砂型铸造用金属模具的问题。介绍了这种技术的工作原理及其特点 ;通过分析砂型铸造用金属模具的结构和工况特征 ,论证了激光熔覆金属粉末快速原型技术适用于这种模具的制造 ,能降低模具制造... 探讨了激光熔覆金属粉末快速原型技术直接制造砂型铸造用金属模具的问题。介绍了这种技术的工作原理及其特点 ;通过分析砂型铸造用金属模具的结构和工况特征 ,论证了激光熔覆金属粉末快速原型技术适用于这种模具的制造 ,能降低模具制造成本、缩短工期 ;提出了在应用中进一步轻量化、低耗化的对策。最后预计 ,随着各种相关技术的发展及其综合、集成度的提高 ,激光熔覆金属粉末制造铸造模具的轻量化。 展开更多
关键词 激光熔覆成型 砂型铸造金属模具 模具结构 模具工况
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The Impacts of Climate Change on Fitzroy River Basin, Queensland, Australia
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作者 Nahlah Abbas Saleh A. Wasimi +1 位作者 Surya Bhattarai Nadhir Al-Ansari 《Journal of Civil Engineering and Architecture》 2017年第1期38-47,共10页
An analysis of historical data of Fitzroy River, which lies in the east coast of Australia, reveals that there is an increasing trend in extreme floods and droughts apparently attributable to increased variability of ... An analysis of historical data of Fitzroy River, which lies in the east coast of Australia, reveals that there is an increasing trend in extreme floods and droughts apparently attributable to increased variability of blue and green waters which could be due to climate change. In order to get a better understanding of the impacts of climate change on the water resources of the study area for near future as well as distant future, SWAT (soil and water assessment tool) model was applied. The model is first tested for its suitability in capturing the basin characteristics with available data, and then, forecasts from six GCMs (general circulation model) with about half-a-century lead time to 2046-2064 and about one-century lead time to 2080-2100 are incorporated to evaluate the impacts of climate change under three marker emission scenarios: A2, A1B and B 1. The results showed worsening water resources regime into the future. 展开更多
关键词 Fitzroy basin climate change water resources SWAT.
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