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For wireless sensor networks in wide-area cropland environments, the routing protocol would be optimal if it is scalable for wide network coverage, energy-efficient for long network lifetime, and adaptive with frequent topology changes. In this paper, a wireless sensor network system with EBGR (Energy-Balanced, Greedy forwarding Routing) protocol was developed based on Memsic IRIS nodes and TinyOS...
Respiratory rate (RR) can often be extracted from electrocardiogram (ECG) or photoplethysmogram (PPG) by analyzing the variations of certain morphological features or the peak-to-peak time interval between them. In this paper, we use a novel method for estimating the RR from the sequence of the pulse transit time (PTT) from radial to the central aorta. To validate this algorithm, in-situ experiments...
This paper offer a method to obtain UAV's flight parameters at auto-landing period based on the algorithm of camera calibration. According to the geometry features of landing ground to obtain vanishing point, the focal length function is established from the u and v axis scale of the image plane, then the attitude and position of UAV are achieved from the calibration result. Simulation indicates that...
Cooperative multi-robot localization uses sensor measurements to estimate poses (locations, orientations) of robots in a given environment. Existing approach [3] updates a robot's belief of its pose instantly whenever it detects another robot. However, such instant update does not always contribute positively to the localization process, since both robots' pose estimates could be highly uncertain...
To solve the problems in modulation recognition of time-frequency overlapped two-signal in the single-channel, an algorithm based on cyclic cumulants used modulation recognition is presented. Through computing the fourth-order cyclic cumulants of pretreated band signals, the feature vector for classification was extracted, and then use the minimum-error criterion to classify time-frequency overlapped...
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