分析了配电调度系统对通信系统的要求。针对配电调度系统的特点,提出了刊用IP over APDH技术实现其通信系统、该通信系统的主干是APDH光纤环路系统,变电站自动化系统的话音和数据以PCM方式接入APDH系统,配电自动化的数据以IP方式接入APD...分析了配电调度系统对通信系统的要求。针对配电调度系统的特点,提出了刊用IP over APDH技术实现其通信系统、该通信系统的主干是APDH光纤环路系统,变电站自动化系统的话音和数据以PCM方式接入APDH系统,配电自动化的数据以IP方式接入APDH系统。APDH光纤环路系统具有容量适中、一步复用、自愈保护和网管功能完善等优点。基于IP技术的配电自动化通信系统遵循ISO的分层方法,能兼容任何1、2层协议,并采用了保证QoS和实时性的协议。展开更多
An accelerated proportional degradation hazards-odds model is proposed. It is a non-parametric model and thus has path- free and distribution-free properties, avoiding the errors caused by faulty assumptions of degrad...An accelerated proportional degradation hazards-odds model is proposed. It is a non-parametric model and thus has path- free and distribution-free properties, avoiding the errors caused by faulty assumptions of degradation paths or distribution of degra- dation measurements. It is established based on a link function which combines the degradation cumulative hazard rate function and the degradation odds function through a transformation pa- rameter, and this makes the accelerated proportional degradation hazards model and the accelerated proportional degradation odds model special cases of it. Hypothesis tests are discussed, and the proposed model is applicable when some model assumptions are satisfied. This model is utilized to estimate the reliability of minia- ture bulbs under low stress levels based on the degradation data obtained under high stress levels to validate the effectiveness of this model.展开更多
文摘分析了配电调度系统对通信系统的要求。针对配电调度系统的特点,提出了刊用IP over APDH技术实现其通信系统、该通信系统的主干是APDH光纤环路系统,变电站自动化系统的话音和数据以PCM方式接入APDH系统,配电自动化的数据以IP方式接入APDH系统。APDH光纤环路系统具有容量适中、一步复用、自愈保护和网管功能完善等优点。基于IP技术的配电自动化通信系统遵循ISO的分层方法,能兼容任何1、2层协议,并采用了保证QoS和实时性的协议。
基金supported by the postdoctoral funding at Tsinghua University
文摘An accelerated proportional degradation hazards-odds model is proposed. It is a non-parametric model and thus has path- free and distribution-free properties, avoiding the errors caused by faulty assumptions of degradation paths or distribution of degra- dation measurements. It is established based on a link function which combines the degradation cumulative hazard rate function and the degradation odds function through a transformation pa- rameter, and this makes the accelerated proportional degradation hazards model and the accelerated proportional degradation odds model special cases of it. Hypothesis tests are discussed, and the proposed model is applicable when some model assumptions are satisfied. This model is utilized to estimate the reliability of minia- ture bulbs under low stress levels based on the degradation data obtained under high stress levels to validate the effectiveness of this model.
