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依据IEC 62280:2014标准并考虑车载ATP与ZC、多普勒雷达、人机接口、BTM之间的通信协议,设计了一种可用于城轨CBTC各子系统间通信的可配置协议栈。本协议栈提供了多种安全校验机制,在通信异常发生时,具有故障—安全的能力。 相似文献
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常规的土压力计算方法均对土体的某些方面作了限制,这些限制条件不适用于实际工程。对有倾斜界面的粘性土体,太沙基曾对该问题提出了图解算法,但应用于实际问题时过于繁复。本文提出了了对这一问题的解析算法,并列表计算了主、被动土压力系数,举例说明了其用法。 相似文献
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新时期大学生思想政治教育面临着多重矛盾并存的客观现状,该现状必然要求高校思想政治教育工作者与时俱进,及时更新观念,积极创新,探索可行性教育方式,确保新时期高校思想政治教育工作的有效性。 相似文献
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城市道路下修建地铁车站等地下工程,需考虑施工对既有地面交通的影响,本文基于课题及实例应用研究,介绍了一种新型临时路面体系,并就其设计及应用进行了相关探讨。该种临时路面体系的应用推广对解决目前城市道路开挖施工对交通影响的问题具有重大的现实意义。 相似文献
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Based on Wiener process model, a new approach for reliability evaluation of cross-linked polyethylene(XLPE) is proposed to improve the lifetime evaluation reliability of XLPE under multi-stressing conditions and study the failure probability distribution. In this paper, two accelerated aging tests are carried out under combined thermal and vibration conditions. The volume resistance degradation data of XLPE samples are tested with a24 h interval under the accelerated stressing conditions at(130℃, 12 m/s~2) and(150℃, 8.5 m/s~2), respectively.Nonlinear degradation data obtained from the experiment are transformed to linear intermediate-variable values using time scaling function, and then linearized degradation data are calculated and evaluated on the basis of linear Wiener process model. Considering traditional Arrhenius equation and inverse power criterion, parameters of the linear Wiener model are estimated according to the maximum likelihood function. The relationship curves on probability density and reliability are given, and the lifetime distribution of XLPE under different stressing conditions is also obtained for evaluating the reliability of XLPE insulation. Finally, the life expectancy of XLPE is 17.9 a under an allowance temperature of 90℃ and an actual vibration acceleration of 0.5 m/s~2. The approach and results in this paper may be used for reliability assessment of high-voltage multiple samples or apparatuses. 相似文献