The Use of Functional Near-infrared Spectroscopy (fnirs) for the Assessment of Vestibular Oculomotor Task-related Brain Activity in Concussion
Purpose Given the fact that neuroimaging studies are currently not used routinely in the evaluation of concussions in the clinical setting, the diagnosis and management of concussion has centered around subjective symptom reports, clinical and neurocognitive examinations. Functional near-infrared spectroscopy (fNIRS), a noninvasive and portable neuroimaging modality that detects changes in blood oxygenation related to human brain function, is a promising tool to address this gap in the clinical evaluation of concussion. While fNIRS has recently demonstrated that adults with a concussion show reduced brain activation on neurocognitive tests compared to …
Abstract. This paper presents a novel hybrid adaptive control approach for the VS-VP half-direct driven WECS by combining pitch control with variable generator torque regulation in different operating regions. A general regression neural network (GRNN) is employed to derive the reference commands of generator torque and pitch angle from the real-time signals of generator power and speed. Furthermore, a fast and effective nonlinear PID pitch controller is presented to track the reference command of pitch angle in the full load region. The proposed GRNN based hybrid adaptive control strategies have been developed and validated using simulations. This study shows that the proposed method is much faster, more accurate and effective than conventional linear control approach.