还是忍不住转了这篇文章 A new approach to wireless sensor networking adds local intelligence to the nodes, creating pervasive computers and enabling sensor networks that can both acquire data and initiate actio

粗略翻译，方便快速阅读 abstract Anomalies of the omnipresent earth magnetic (i.e., geomagnetic) field in an indoor environment, caused by local disturbances due to construction materials, give rise to noisy di