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Localization is an important and extensively studied problem in ad-hoc wireless sensor networks. Most schemes require some nodes functioned as anchors with positions configured manually which are error-prone. In this paper, a GPS-free localization scheme is proposed. High accurate TOA is acquired by means of measure the time difference between two simultaneously transmitted radio and ultrasonic signals...
Optogenetic technology is a novel method which can achieve bidirectional control of neural signals with cell type specific and high spatiotemporally precise. We developed an illumination system to control light sensitive cytoactive based on optogenetic technology. A NE555 driven circuit was utilized to control the high-intensity of a blue or yellow light-emitting diode (LED). The optical wavelength...
A novel spatial-time-frequency approach to classify the different mental task in brain computer interface was presented. A high resolution time-frequency spectral was achieved by using empirical mode decomposition and Hilbert-Huang transform, and the subject specific spatial-time-frequency joint features were extracted from the restricted spectral of multi-channel EEG recordings. A weighting synthetic...
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