使问题的维数，对各级渐近解而言，降低了一维。
For every order of the asymptotic solution, the dimensionality of the problem has been decreased by one.
同时给出了输入输出维数相等时的解耦并完全线性化的充要条件。
When the output vector dimensions equal to the input vector dimensions, the necessary and sufficient conditions for decoupling and complete linearization to nonlinear system are given.
电源优化问题具有高维数、非线性、随机性等特点，常规的优化算法难以求解到最优解。
The generation expansion optimization is high dimension, nun-linear, randomness problems. The convention algorithm hardly finds the best solution.
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