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1.
Film boiling chemical vapor infiltration (FB-CVI) is considered as one of the fastest process methodologies for manufacturing carbon-carbon (C–C) composite products and possesses various advantages compared to conventional methodologies. However, there are safety concerns associated with this process for large-scale manufacturing, mainly owing to the intrinsic nature of the precursor and the process conditions. Considering the multifunctional interactions of the various systems during the process, a system-theoretic process analysis (STPA)/system theoretic accident model and process (STAMP) model is used to perform a safety analysis of the hazardous states of the FB-CVI process at the system level. As a case study, the FB-CVI process equipment employed for the manufacturing of C–C composites is considered. The safety constraints present in the system are assessed for adequacy through a hazard analysis by STPA/STAMP. The analysis through STPA/STAMP demonstrated the capability to create proactive strategies for the design and realization of process equipment that can be employed to manufacture C–C composite products through the FB-CVI process. 相似文献
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全面科学地分析了人类的行为与地质灾害后,针对我国当前的实际情况,提出了几个值得深思的问题,试图提醒人们如何规范自己的行为,以达到保护环境,预防和减轻地质灾害之目的。 相似文献
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特大型煤和瓦斯突出的地质条件及其成因 总被引:2,自引:0,他引:2
朱兴珊 《中国安全科学学报》1997,7(6):18-24
特大型煤和瓦斯突出危害极大,具有独特的发生条件,应专门研究。在全国99 次特大型煤和瓦斯突出详细研究的基础上,总结了特大型突出的一般特征及发生的地质和采矿条件,并给出了南桐矿区的几个临界值。对特大型突出地质条件的成因进行了较深入的探讨,提出了防止特大型突出的几点建议 相似文献
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针对游乐设施行业危险源、损伤、失效和故障四个概念的认知差异,通过研究相关领域这四个概念定义内涵及外延,结合游乐设施安全保障要求高、人-机-环交互频繁、运行工况复杂的特点,重新定义游乐设施这四个概念,辨析相互之间的逻辑关系,并结合游乐设施事故案例进行解析.结果表明:新定义对游乐设施危险源、失效、损伤和故障之间的关系阐述更加清晰准确,为后续的风险评价奠定良好基础. 相似文献
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J. F. Copplestone 《Journal of environmental science and health. Part. B》2013,48(6):683-688
Abstract The importance of field surveys to provide data on acute pesticide hazards is discussed. The types of questions which small field surveys of pesticide exposure should answer are presented. In addition to protective clothing, the value of distance, time, and personal hygiene in reducing exposure are considered. Finally, the importance of an adequate data base for the development of protocols and guidelines for public protection is discussed. 相似文献
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We develop an understanding of local governmental efforts to address earthquake risks. Our data for a sample of California
and Washington cities' risk-reduction efforts sort into two different clusters of leading jurisdictions as contrasted with
a cluster of lagging jurisdictions. We explain differences among the three categories of cities in terms of different political-economic
factors. Local governmental willingness and ability to undertake risk-reduction programs have more to do with local political
demands and community resources than with objective risk or previous earthquake experience. State mandates have a selective
impact on local risk-reduction efforts. The principal policy lessons concern the need to address gaps in local risk-reduction
efforts through more careful targeting of federal and state earthquake programs and by including stronger teeth within state
mandates. 相似文献
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