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.
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.
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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