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可靠性的铁路运输安全预警理论分析
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作者 西若 《中外企业家》 2016年第4Z期230-,共1页
作为我国交通系统的一部分,铁路运输对整个社会经济的发展都起到极其重要的作用,铁路运输安全预警理论的建立对风险等级做出了明确的规定,对于保证铁路运输的安全性与可靠性具有重要作用。
关键词 可靠性 铁路运输 安全预警理论
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Laws of strata energy release and corresponding safety warning system in metal mine 被引量:5
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作者 刘志祥 郭永乐 +1 位作者 刘超 卢俊华 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第11期2508-2512,共5页
The strata deformation in mining area was monitored in Dabaoshan copper-iron mine,and an analytical method of strata energy release was put forward.On the basis of chaotic theory,by reconstructing the phase space for ... The strata deformation in mining area was monitored in Dabaoshan copper-iron mine,and an analytical method of strata energy release was put forward.On the basis of chaotic theory,by reconstructing the phase space for time series data of strata energy release,the saturated embedding dimension and the correlation dimension of the dynamic system were obtained to be 4 and 1.212 8,respectively,and the evolution laws of distances between phase points of strata energy release in the phase space were revealed.With grey theory,a prediction model of strata energy release was set up,the maximum error of which was less than 6.7%.The results show that there are chaotic characters in strata energy release during mining;after reconstructing phase space,the subtle changing characteristics of energy release can be magnified,and the internal rules can be fully demonstrated.According to the laws,a warning system for strata stability in mining area was established to provide a technical safeguard for safe mining. 展开更多
关键词 strata energy release phase space reconstruction grey theory safety warning system
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Partition airflow varying features of chaos-theory-based coalmine ventilation system and related safety forecasting and forewarning system 被引量:1
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作者 Zhang Xiaoqiang Cheng Weimin +2 位作者 Zhang Qin Yang Xinxiang Du Wenzhou 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2017年第2期269-275,共7页
To realize real-time monitoring and short-term forecasting and forewarning of coalmine ventilation systems(CVS), in this paper, we first established a joint surface and underground CVS safety management system consist... To realize real-time monitoring and short-term forecasting and forewarning of coalmine ventilation systems(CVS), in this paper, we first established a joint surface and underground CVS safety management system consisting of main ventilation fan, safety-partition linked passageways, and air-required locations. We then applied chaos theory to identify the air quantity and gas concentration of underground partition boundaries, and adopted a fixed data quantity, multi-step progressive, weighted first-order local-domain method to setup a chaos prediction model and a CVS safety forecasting and forewarning system formed by the normal change level, orange forewarning level, and red alarm level. We next conduct the on-field application of the system in a coalmine in Jining, Shandong, China. The results showed that (1) in the statistical scale of 5 min, the changes in both air quantity and gas concentration along CVS partition airflow boundaries were characteristic of chaos and could be used for short-term chaos prediction, and the latter was more chaotic than the former;(2) the setup chaos prediction model had a higher prediction precision and the established safety prediction system could not only predict the variation in CVS stability but also reflect the rationality of underground mining intensity. Thus, this CVS safety forecasting and forewarning system is of better application value. 展开更多
关键词 Mine ventilation system Safety partition Reconstructed phase space Maximum Lyapunov exponent Chaos forecasting and forewarning
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