The regularities of the solid solutions between the scheelite-type compounds and rare earth molybdates or tungstates were investigated by the atomic parameter-support vector machine method and the intelligent database...The regularities of the solid solutions between the scheelite-type compounds and rare earth molybdates or tungstates were investigated by the atomic parameter-support vector machine method and the intelligent database of phase diagrams of molten salt systems. The crystal structure of scheelite-type compounds having M^1M^′Ⅲ （XO4）2（X = Mo, W） as common formula and the formability of the continuous solid solution between these compounds and rare earth molybdates or tungstates were also investigated. Besides, the cell constants of these compounds can be calculated by some semi-empirical equations. Based on the obtained relationships, the results of computerized prediction of the solid solubility of T1Pr （MoO4）2-Pr2 （MoO4）3 system have good agreement with experimental results.展开更多
The UHVAC 1 000-kV transmission system is so far the one with the most advanced transmission technique applied and highest operation voltage.There are no guidelines or standards available for the design of 1 000-kV ov...The UHVAC 1 000-kV transmission system is so far the one with the most advanced transmission technique applied and highest operation voltage.There are no guidelines or standards available for the design of 1 000-kV overhead transmission line in China.Study on key technologies and design schemes shall be carried out to ascertain the technical principles and construction standards for project construction,which are presented in this paper based on the Southeast Shanxi-Nanyang-Jingmen test and demonstration transmission line.A comparison and analysis of technical data and economic indices between UHV line and other lines are also described.展开更多
人工智能、大数据、建筑信息模型(Building Information Modeling,BIM)、信息传感技术等的快速发展给桥梁智能建造和运维提供了基础。以大跨度铁路桥梁为主要研究对象,采用文献调研、现场试验、数据分析等手段,开展桥梁智能建造和运维...人工智能、大数据、建筑信息模型(Building Information Modeling,BIM)、信息传感技术等的快速发展给桥梁智能建造和运维提供了基础。以大跨度铁路桥梁为主要研究对象,采用文献调研、现场试验、数据分析等手段,开展桥梁智能建造和运维综述。大跨度铁路桥梁智能建造与运维以模型和数据驱动为核心技术特征,前者表征桥梁结构的力学行为与物理机制,后者用于实现桥梁数字化或基于数据的桥梁状态推断,两者贯穿于桥梁设计、施工、验收和运维的全生命周期。智能设计不仅体现在设计工具的发展变革,基于性能的设计方法可从更高层次实现智能化设计,并对标桥梁安全、适用、经济、耐久目标。智能施工是智能建造的另外关键一环,以自动化信息化施工装备、施工全过程监测与预警、基于智能信息化平台的建设管理为主要发展方向,以安全、质量、绿色可持续等为评价指标。应用无人机、微波干涉雷达、移动检测装备等自动化技术开展新建大跨度铁路桥梁的线-桥状态评定将成为未来桥梁验收的发展趋势。进一步基于建维一体化理念,建立融合施工期关键数据和验收期桥-轨初始状态数据的数字孪生模型,可为智能运维管养提供基础模型支撑。智能运维以自动化检测、健康监测等为主要技术手段,正在朝模型和数据驱动的状态修、预防修方向发展,从线-桥一体化角度,推动实现桥梁与轨道检测监测数据的融合分析、线-桥状态综合评价,构建管理维修决策模型,是未来铁路桥梁智能运维发展的目标。展开更多
文摘The regularities of the solid solutions between the scheelite-type compounds and rare earth molybdates or tungstates were investigated by the atomic parameter-support vector machine method and the intelligent database of phase diagrams of molten salt systems. The crystal structure of scheelite-type compounds having M^1M^′Ⅲ （XO4）2（X = Mo, W） as common formula and the formability of the continuous solid solution between these compounds and rare earth molybdates or tungstates were also investigated. Besides, the cell constants of these compounds can be calculated by some semi-empirical equations. Based on the obtained relationships, the results of computerized prediction of the solid solubility of T1Pr （MoO4）2-Pr2 （MoO4）3 system have good agreement with experimental results.
文摘The UHVAC 1 000-kV transmission system is so far the one with the most advanced transmission technique applied and highest operation voltage.There are no guidelines or standards available for the design of 1 000-kV overhead transmission line in China.Study on key technologies and design schemes shall be carried out to ascertain the technical principles and construction standards for project construction,which are presented in this paper based on the Southeast Shanxi-Nanyang-Jingmen test and demonstration transmission line.A comparison and analysis of technical data and economic indices between UHV line and other lines are also described.
文摘人工智能、大数据、建筑信息模型(Building Information Modeling,BIM)、信息传感技术等的快速发展给桥梁智能建造和运维提供了基础。以大跨度铁路桥梁为主要研究对象,采用文献调研、现场试验、数据分析等手段,开展桥梁智能建造和运维综述。大跨度铁路桥梁智能建造与运维以模型和数据驱动为核心技术特征,前者表征桥梁结构的力学行为与物理机制,后者用于实现桥梁数字化或基于数据的桥梁状态推断,两者贯穿于桥梁设计、施工、验收和运维的全生命周期。智能设计不仅体现在设计工具的发展变革,基于性能的设计方法可从更高层次实现智能化设计,并对标桥梁安全、适用、经济、耐久目标。智能施工是智能建造的另外关键一环,以自动化信息化施工装备、施工全过程监测与预警、基于智能信息化平台的建设管理为主要发展方向,以安全、质量、绿色可持续等为评价指标。应用无人机、微波干涉雷达、移动检测装备等自动化技术开展新建大跨度铁路桥梁的线-桥状态评定将成为未来桥梁验收的发展趋势。进一步基于建维一体化理念,建立融合施工期关键数据和验收期桥-轨初始状态数据的数字孪生模型,可为智能运维管养提供基础模型支撑。智能运维以自动化检测、健康监测等为主要技术手段,正在朝模型和数据驱动的状态修、预防修方向发展,从线-桥一体化角度,推动实现桥梁与轨道检测监测数据的融合分析、线-桥状态综合评价,构建管理维修决策模型,是未来铁路桥梁智能运维发展的目标。
