Steady-state probability, frequency and duration are the three main indices in reliability evaluation of the HVDC systems. Generally, they are solved by numerical methods.
稳态概率、状态频率和持续时间是高压直流系统可靠性评估中的三个主要可靠性指标，一般用数值方法求解。
This article has conducted researches on the teaching contents, methods, means, experiments and evaluation systems so as to achieve the goal of the special training.
本文在教学内容、方法、手段、实验教学及评价体系等方面作了初步探索，以期达到专业培养目标。
To start with, this paper analyzes and summarizes succinctly some quantitative evaluation methods from safety systems engineering.
全文首先从安全系统工程的角度出发，简要分析和归纳了几种定量评价方法。
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