It is an important problem to improve the application ability of man-machine interface system. Applicability mainly includes environmental adaptability, portability and biocompatibility. The acquisition of EEG involves high environmental requirements. The amplitude of EEG signal is very small, which is unstable in the process of EEG signal acquisition and will inevitably be interfered by other signals. When the environmental noise is relatively large, the accuracy of the brain-computer interface system will be reduced. Therefore, it is necessary to improve the environment of man-machine interface system. Adaptability is an important research topic for implanted electrodes, and its biocompatibility is a particularly big challenge.
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