1. The fault diagnosis problem of active network is studied in this paper with the emphasis upon its solvability and diagnosability.
   摘要本文研究有源网络的故障诊断问题，著重研究其可解性与可诊断性。
2. The diagnosis principle and diagnosability conditions are proposed, and the normal tolerance network test nede voltage interval are given by interval iterative algorithm.
   该方法给出了容差情况下诊断的原理和可诊断性条件，并利用区间迭代算法，给出了容差网络无故障情况下的测试节点电压范围。

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