基于所建立的数学模型，采用多态相分量法处理纵向故障的方法来计算新型换流变压器的纵向不对称故障。
Based on the mathematical model, the polymorphic phase-coordinate method is adopted to calculate the longitudinal and asymmetric faults for new-type converter transformer.
本文在科学计算辅助建模领域引入多态的概念，用来表述复杂模型由于模型精度、计算时间、计算精度的变化所产生的多种状态；
In the thesis the concept is introduced into the field of computer-aided modeling of science computing, and the concept is used to represent different states of a complex model.
通过系统可靠性的计算，评价多态结点非循环网络系统的性能可靠性。
By computing the system reliability, the performance reliability of the multi-state-node acyclic network system can be evaluated.
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