However, the conventional FFD methods can not solve the existing problems in current system because of either inconvenient control tools or large time and space costs.

 
  • 但是,已有的这类方法或者控制手段不够灵活,或者时间和空间开销较大,且各类变形方法都有其自身的适用场合,不适于解决现有工作中遇到的问题。
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