Fan Li

TL;DR: In this paper, the authors proposed HearFit, the first non-invasive fitness monitoring system based on commercial smart speakers for home/office environments, which turns smart speakers into active sonars.

TL;DR: The problem of online dynamic channel accessing in multi-hop cognitive radio networks is considered as a linearly combinatorial multi-armed bandits (MAB) problem that involves a maximum weighted independent set (MWIS) problem with unknown weights and a distributed channel access algorithm is proposed.

TL;DR: It is proved that the optimization problem of finding the optimal awake sensor set with the minimum total cost is NP-hard, and several topology design algorithms are proposed which can significantly reduce the total cost of topology while maintaining the connectivity over time.

TL;DR: The asymptotic critical transmission radius for greedy routing is studied to ensure the packet delivery in randomly deployed 3D networks and it is theoretically proved that for a 3D network, formed by nodes that are produced by a Poisson point process of density nover a convex compact region of unit volume, 3beta_0 is asymPTotically almost surely the threshold of the critical Transmission radius for 3D greedy routing.

TL;DR: This article proposes a fall detection system, called FallViewer, based on analyzing the channel state information (CSI) of Wi-Fi signals, which can detect fall events with an average accuracy of 95.8%, and applies a double sliding window to get a flexible threshold, which improves the robustness of Fall viewer to various environments.