1·Facing the intensive competition, changefully national and international market, the enterprise needs to make true decision.
企业面对激烈的竞争、多变的国内国际市场，需要做出正确的决策。
2·The result of analysis and experiment show that the proposed method can be applied in the AC variable frequency speed control system which is nonlinear, fast changefully and difficult to be modeled.
理论分析与实验的结果表明：该方法对异步电机变频调速这一非线性、快速多变、难于建模复杂系统的控制是实用和有效的。