Finally, the main problems of localization system and map building for autonomous mobile robot and solutions to them are analyzed, and the future trend in this field is pointed out too.

最后，论述了自主式移动机器人定位系统与地图构造中所面临的主要问题及其解决方法并指出了该领域今后的研究方向。

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With the development of GPRS technology in mobile communication field, it is studied that the new mobile payment system based on mobile telephone in the world.

随着通用分组无线业务（GPRS）技术在移动领域的逐步成熟，世界各国都在积极研究这项新兴的移动支付系统。

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In the field of mobile communication, demand for location-based service (LBS) is growing, WLAN-based indoor location system that precisely meets the needs is becoming a research focus.

在移动通信领域，人们对基于位置服务(LBS)的需求正在不断增长，基于WLAN的室内定位系统正是迎合了这种需求的一个新兴的研究热点。

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