排序方式: 共有6条查询结果,搜索用时 984 毫秒
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公路BOT模式的风险分析及对策 总被引:1,自引:0,他引:1
结合西部某BOT建设工程项目实例,探讨了公路BOT模式的主要风险(法律政策风险、前期运作风险、完工风险、运营风险)识别,并根据风险识别对风险因素进行定量分析,最后提出对风险的处理与对策. 相似文献
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介绍了振动环境试验仿真平台中数据再现系统的总体设计方案、系统功能、关键技术及系统特点.该系统实现了不同试验采集平台获取的数据和不同仿真计算平台的结果数据,在同一平台上的可视化直观比较、分析、校验和映射.为产品试验人员、产品设计人员开展产品性能分析、试验分析等提供了通用、方便的集成环境. 相似文献
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The purpose of this research is to explore the feasibility of roller hemming of AZ31B magnesium alloy sheet. During the test, a special experimental setup considering the current flow and insulation was designed and employed. For the sake of simplicity, the flat surface-straight edge hemming style was selected. Electrical pulses were introduced in the pre-hemming and final hemming processes. The results show that when hemming at 448 K with hemming speed of 30 mm/min, AZ31B magnesium alloy sheet was successfully hemmed with excellent perceived quality. No recoil/warp defect, cracking or springback was observed. Electrical pulses induced dynamic recrystallized grains were observed along the grain boundaries in the severely deformed area, which is of great importance to the improvement of the ductility of the material. The hardness was slightly increased after hemming with electrical pulses, and this fact could improve the friction resistance performance of the hemmed part. 相似文献
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