The third part analyzes the technique of communication, especially technical development trend of 3g, and emphasizes to contrast three kinds of 3g technique.
第三部分分析了移动通信技术、尤其是3 G技术的发展趋势，并着重对比了三种主流的3g技术。
Finally draws the innovative conclusion: the travel agency can create three different kinds of influences, that is strengthening, omission and misinterpretation to the hotel positioning communication.
最终得出创新性的结论：旅行社在酒店定位的传播过程中具有强化、销蚀和曲解三种不同的作用。
The paper explains the advantages of IP multicast technology in the network transmission of embedded video monitoring system through comparing three kinds of different network communication ways.
通过比较三种不同的网络通信方式，阐述IP组播技术在嵌入式视频监控系统网络传输方面的优势。
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