提出了一种基于节点电纳摄动改造配电网全节点导纳矩阵可逆性的方法。
Then, an efficient method for upgrading the reversibility of full bus admittance matrix of a distribution network is proposed by perturbing shunt susceptance.
运用基解矩阵和摄动方法，给出了两类微分方程的通解表达式。
By using fundamental solution matrix and method of perturbation, we give the expression of general solutions for two classes of differential equations.
基于正规性分析结果，使用系统不确定性反馈摄动描述对姿态控制系统的正规矩阵设计方法进行研究。
Based on the results, a normal matrix design approach for spacecraft attitude control systems is developed by using a feedback perturbation description for system uncertainties.
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