基于无线传感器的室内救援辅助系统

基于融合射频技术和超声测距技术的无线传感器阵列，设计适合室内环境的具有无线精确定位与导航功能的救援辅助系统，并 给出系统实现方法。实验结果证明了系统的有效性，该系统可以实现大型建筑物内部的实时定位、导航、远程监控以及信息交互等功能。

Indoor Assist System for Rescue Based on Wireless Sensor

In order to make each bank of multi-level organizational structure issue e-cash instead of its superior bank, this paper proposes a new off-line e-cash scheme without trusted third party, which is based on multi-level proxy blind signature. Through combination with the smart card technology, the scheme solves double-spending problem effectively with double protective mechanisms, the prior restraint of the smart card and the later check of the bank. Analysis result shows that this scheme has some characteristics, such as good security, unforgeability, no double-spending, anonymity, unlinkability and practicability.