An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, clo...An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, cloud data de-noising optimization, construction, display and operation of three-dimensional model, model editing, profile generation, calculation of goaf volume and roof area, Boolean calculation among models and interaction with the third party soft ware. Concerning this system with a concise interface, plentiful data input/output interfaces, it is featured with high integration, simple and convenient operations of applications. According to practice, in addition to being well-adapted, this system is favorably reliable and stable.展开更多
随着电力系统对电缆线路工作井维护的便利性和安全性要求的提高,电缆线路工作井的设计更为复杂性,传统的造价计算方法已无法满足现代工程的需求。为了提高工程量计算的效率和精度,开发一套基于建筑信息模型(Building Information Modeli...随着电力系统对电缆线路工作井维护的便利性和安全性要求的提高,电缆线路工作井的设计更为复杂性,传统的造价计算方法已无法满足现代工程的需求。为了提高工程量计算的效率和精度,开发一套基于建筑信息模型(Building Information Modeling,BIM)技术的电缆线路工作井智能造价系统,通过Revit二次开发,结合SQL Server数据库,实现了电缆工作井的参数化建模、工程量快速计算、定额套取以及报表的生成与导出。研究结果表明,该系统能够显著提升工程造价的准确性和工作效率,同时保障数据的一致性和信息的连贯性,并且满足规范要求。展开更多
To improve the combustion chamber shape that can decrease the directed injection （DI） diesel emission, the theories of DI diesel spray, combustion and pollutant formation model are analysed and implemented based on ...To improve the combustion chamber shape that can decrease the directed injection （DI） diesel emission, the theories of DI diesel spray, combustion and pollutant formation model are analysed and implemented based on the CFD code FIRE. Results show that the chamber with contracting orifice can get stronger squish swirl intensity. The results of the verification studies show a good accordance with the measurements and reveal that the individual processes of spray, evolution, combustion and pollutant formation are well captured in FIRE. Finally, based on the analyzing and comparing of the calculation results of different chambers, a combustion chamber of contracting orifice geometry with lower emission is proposed.展开更多
基金Project(51274250)supported by the National Natural Science Foundation of ChinaProject(2012BAK09B02-05)supported by the National Key Technology R&D Program during the 12th Five-year Plan of China
文摘An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, cloud data de-noising optimization, construction, display and operation of three-dimensional model, model editing, profile generation, calculation of goaf volume and roof area, Boolean calculation among models and interaction with the third party soft ware. Concerning this system with a concise interface, plentiful data input/output interfaces, it is featured with high integration, simple and convenient operations of applications. According to practice, in addition to being well-adapted, this system is favorably reliable and stable.
文摘随着电力系统对电缆线路工作井维护的便利性和安全性要求的提高,电缆线路工作井的设计更为复杂性,传统的造价计算方法已无法满足现代工程的需求。为了提高工程量计算的效率和精度,开发一套基于建筑信息模型(Building Information Modeling,BIM)技术的电缆线路工作井智能造价系统,通过Revit二次开发,结合SQL Server数据库,实现了电缆工作井的参数化建模、工程量快速计算、定额套取以及报表的生成与导出。研究结果表明,该系统能够显著提升工程造价的准确性和工作效率,同时保障数据的一致性和信息的连贯性,并且满足规范要求。
文摘To improve the combustion chamber shape that can decrease the directed injection （DI） diesel emission, the theories of DI diesel spray, combustion and pollutant formation model are analysed and implemented based on the CFD code FIRE. Results show that the chamber with contracting orifice can get stronger squish swirl intensity. The results of the verification studies show a good accordance with the measurements and reveal that the individual processes of spray, evolution, combustion and pollutant formation are well captured in FIRE. Finally, based on the analyzing and comparing of the calculation results of different chambers, a combustion chamber of contracting orifice geometry with lower emission is proposed.
