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软件可靠性分配是保证软件质量的重要方法之一。该文提出了一种基于云模型的进化策略,并应用于求解软件可靠性分配模型,实例表明可以得到比常规的数值方法及遗传算法更精确的结果。 相似文献
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为有效解决工程风险巡视效率低下、协同度低、主观能动性差的弊端,加强风险巡视的过程控制,充分利用BIM技术的可视化和信息集成化特点,同时保证施工过程风险管控的有效性和可追溯性,依托在建北京地铁19号线平安里站对施工风险巡视过程控制进行研究。研究基于自主研发的风险巡视APP和搭建的BIM-GIS三维场景,首先,通过现场定位和虚拟仿真的手段实现排查位置和排查信息的记录;其次,对排查信息设置风险过滤条件;最后,对风险信息进行集成管理。研究得出: 基于BIM的风险管理可以控制风险巡视过程,快速有效地分类整理并推送风险集成信息,通过BIM可视化和信息集成化的手段可以有效地控制整个管理流程,提高风险识别能力。 相似文献
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Development and Thinking of Tunnels and Underground Engineering in China in Recent 2 Years (From 2017 to 2018)(近2年我国隧道及地下工程发展与思考(2017—2018年)) 下载免费PDF全文
HONG Kairong 《隧道建设》2019,39(5):710-723
The author gives an overview of the development of tunnels and underground engineering in China in the past two years, including railway tunnel, high speed railway tunnel, highway tunnel, metro tunnel, hydraulic tunnel and utility tunnel, and introduces some key and representative railway, highway and municipal tunnels projects, i.e. Muzhailing Tunnel on Lanzhou Chongqing Railway, Dangjinshan Tunnel on Dunhuang Golmud Railway, immersed tunnel of Hong Kong Zhuhai Macao Bridge, China Laos Railway Tunnel, Gaoligongshan Tunnel on Dali Ruili Railway, Yuelongmen Tunnel on Chengdu Lanzhou Railway, Tianshan Shengli Tunnel on Urumchi Yuli County High speed Railway, Shenzhen Zhongshan Passage, Su′ai Tunnel in Shantou, Ka Shuang Tunnel of Ertix River Water Diversion Project, Qianhai underground integrated hub in Shenzhen and underground integrated structure of Optics Valley Square in Wuhan. The author also introduces the development and progress in the fields of engineering investigation technology, BIM technology, mechanized and intelligent tunnel construction technology, shield/TBM manufacturing and remanufacturing technology, offshore immersed tube tunnel construction technology, non circular shield tunnel construction technology, tunnel big data platform construction technology, etc. According to the operation of series national strategies and planning such as Sichuan Tibet Railway, coordinated development of Beijing, Tianjin and Hebei, the Yangtze Economic belt, and the Guangdong Hong Kong Macao Greater Bay Area, following technical demands are proposed, namely, sea crossing tunnels, construction of complex and long distance tunnels, environmental protection technology for tunnel construction in ecologically vulnerable areas, development of large scale urban underground complexes, research and development of new materials in alpine environment, intelligent diagnosis of tunnel diseases and rapid repairs, intelligent disaster prevention of ultra long complicated tunnels and underground engineering, etc. Some thoughts and suggestions are put forward in two aspects of engineering construction management mode and mechanization supporting in combination with the development status of the industry. 相似文献
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德尔福摩托车EMS技术简介 总被引:3,自引:0,他引:3
介绍了德尔福摩托车EMS的硬件构成和控制模块的主要功能,包括燃油喷射量管理控制、发动机点火管理控制和一些储备功能。德尔福已为国内摩托车生产企业开发了若干款摩托车EMS。试验表明,采用德尔福摩托车EMS后,摩托车的动力性、经济性、排放指标和综合驾驶性能都有显著改善。 相似文献
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GPS在汽车上的应用 总被引:1,自引:0,他引:1
本文介绍了GPS(全球卫星定位系统)的基本组成,测位基本工作原理及GPS在汽车上的应用,同时提出了GPS在实际应用中的问题及解决方法。 相似文献
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