以树状河系为研究对象，分析其空间特征，建立基于图论的水系网矢量模型。
This paper analyzed the spatial characteristics of tree-like river networks, and built vector model based on graph theory.
将PARK变换引入到空间矢量调制矩阵变换器中，建立了矩阵变换器的线性定常电路模型。
The linear time invariant equivalent circuit model is established by introducing the PARK transformation to the space vector modulated matrix converter.
用合适的状态空间邻近矢量进行非线性局部分析，即使没有基音周期估计，短时预测器同样能建立长时相关性模型。
With an appropriate state space neighbour for the nonlinear local analysis, the short_delay predictor is also able to effectively model the long_term correlation without pitch estimation.
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