目前在德国，他们试用了一种类似的系统，而男性则反对使用女性声音来提供方向信息，因此该系统不得不退出市场。

Now, in Germany when they tried a similar system, men reacted against being given directions by a female voice so it had to be taken off the market.

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仿真实验表明，设计的系统结构降低每个结点加入和退出时发送的消息数量，减少了信息检索延迟，取得了较好的用户满意度。

The simulation results show that the designed structure reduces join and exit number of messages that each node sends and the search delay of information. It achieves good customer satisfaction.

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