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61.
《Process Safety and Environmental Protection》2014,92(6):625-636
In this paper we explore the concept of transmission Functions and its application to the resolution of the problem posed by the uncertainty in the time to take manual protective actions due for instance to different operator abilities. This time uncertainty is a very special kind of uncertainty with obvious relevance in Protection Engineering problems. Tackling it involves a large amount of simulations of transients associated to sequences of system transitions, resulting from those actions, where the only difference from one simulation to another is the time interval between transitions, the evolution laws being always the same. In order to solve such type of problems, a new formalism is proposed based on the concept of transmission Function. We prove that for a large class of Multiple Input–Multiple Output (MIMO) piecewise linear systems, the output may be obtained as additive contributions of each interval of the sequence, each one characterized via a Transmission Function. We then provide efficient methods to compute Transmission Functions of sequences of canonical Single Input-Single Output (SISO) piecewise systems, and to find the locus of protective action times that lead to damage (damage domain). 相似文献
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安全系统工程的回顾与展望 总被引:1,自引:1,他引:1
冯肇瑞 《中国安全科学学报》1992,2(3):8-12
回顾了系统工程在安全领域中应用的情况,并指出国内使用的名词“安全系统工程”与“系统安全工程”在含义上是有区别的,认为在安全领域中应制定名词统一标准。文章还讨论了安全系统工程的展望。 相似文献
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《环境土建工程》是研究环境工程土建施工方法的一门综合性、实践性很强的学科。它是为环境工程专业高职生开设的一门重要的专业基础课。以往这门课程的教学形式较为传统,不适应当今高职教育形式之处很多。因而,改变单一的课堂教学方式,多种教学手段相结合;改革考核、考试办法,培养学生的学习能力;勤于实践总结,不断发现问题,培养创新能力。 相似文献
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本文对工程项目大气环境影响评价中污染物浓度叠加方法进行了研究。在叠加方法研究中,提出用判别指数判别筛选叠加方法。通过叠加方法筛选,选取了瞬时浓度,日均浓度叠加方法。经实例验证,证明方法是合理可行的,适用于大气污染物浓度叠加计算。 相似文献
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污水处理工程的防腐初探 总被引:1,自引:0,他引:1
污水处理工程在运行中经常受到气、液相腐蚀介质的破坏,严重地影响其使用功能和结构安全。该文从理论上介绍了钢筋混凝土构筑物及设备在各种条件下的腐蚀现象和防腐机理,提出了防腐应从设计到施工进行综合防治的想法,并通过工程实例加以说明。 相似文献
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Explosion pressure prediction via polynomial mathematical correlation based on advanced CFD Modelling 总被引:1,自引:0,他引:1
Sávio S.V. Vianna Robert Stewart Cant 《Journal of Loss Prevention in the Process Industries》2012,25(1):81-89
Computational Fluid Dynamics CFD can be used as a powerful tool supporting engineers throughout the steps of the design. The combination of CFD with response surface methodology can play an important role in such cases. During the conceptual engineering design phase, a quick response is always a matter of urgency. During this phase even a sketch of the geometrical model is rare. Therefore, the utilisation of typical response surface developed for congested and confined environment rather than CFD can be an important tool to help the decision making process, when the geometrical model is not available, provided that similarities can be considered when taking into account the characteristic of the geometry in which the response surface was developed. The present work investigates how three different types of response surfaces behave when predicting overpressure in accidental scenarios based on CFD input. First order, partial second order and complete second order polynomial expressions are investigated. The predicted results are compared with CFD findings for a classical offshore experiment conducted by British Gas on behalf of Mobil and good agreement is observed for higher order response surfaces. The higher order response surface calculations are also compared with CFD calculations for a typical offshore module and good agreement is also observed. 相似文献