Abstract: The present disclosure illustrates an audio processing circuit, a car-mounted player, and a wireless playback system. The audio processing circuit includes: a signal acquisition module including a wireless input module and/or a wired input module, where the wireless input module is configured to receive an audio signal based on a wireless technology, and the wired input module is configured to receive the audio signal based on a wired technology; an audio processing module, configured to process the audio signal received by the signal acquisition module to improve sound quality of the audio signal; a frequency modulation (FM) transmitter module, configured to perform FM transmission on the audio signal output by the audio processing module; and a power supply module, configured to supply power to the signal acquisition module, the audio processing module and the FM transmitter module.

Abstract: The present disclosure illustrates an audio processing circuit, a car-mounted player, and a wireless playback system. The audio processing circuit includes: a signal acquisition module including a wireless input module and/or a wired input module, where the wireless input module is configured to receive an audio signal based on a wireless technology, and the wired input module is configured to receive the audio signal based on a wired technology; an audio processing module, configured to process the audio signal received by the signal acquisition module to improve sound quality of the audio signal; a frequency modulation (FM) transmitter module, configured to perform FM transmission on the audio signal output by the audio processing module; and a power supply module, configured to supply power to the signal acquisition module, the audio processing module and the FM transmitter module.

Abstract: Disclosed herein are two-dimensional (2D) nanosheets comprising a continuous transition metal oxide phase permeated by a plurality of pores. The plurality of pores can have an average characteristic dimension of from 1 nm to 30 nm. Also disclosed herein are methods of making the 2D nanosheets described herein. The 2D nanosheets can be prepared by reacting a graphene template with a transition metal compound to form a nanosheet precursor and calcining the nanosheet precursor to form the 2D nanosheet. Methods of use of the 2D nanosheets, for example as electrodes in batteries, are also described.