Abstract: The present disclosure relates to compounds of Formula I: and pharmaceutically acceptable salts thereof, pharmaceutical compositions thereof, useful in the treatment of treating viral infections, for example, coronaviridae infections.

Abstract: Embodiments of this application provide a PPG control method and apparatus, and an electronic device. The method is applied to an electronic device, the electronic device includes a PPG module, and the PPG module includes a light emitting module. The method includes: determining a current measurement environment and/or measurement target, where the measurement environment includes motion, rest, and sleep, and the measurement target includes a heart rate and blood oxygen; and determining a light emitting mode of the light emitting module based on the current measurement environment and/or measurement target. The method according to this embodiment of this application can reduce power consumption of the PPG module while ensuring measurement accuracy of the PPG module.

Abstract: The present disclosure relates to compounds of Formula I: and pharmaceutically acceptable salts thereof, pharmaceutical compositions thereof, useful in the treatment of treating viral infections, for example, coronaviridae infections.

Abstract: A wearable device based on photoplethysmography PPG and a control method thereof are disclosed, where the wearable device includes a PPG module and a processor. The PPG module includes a plurality of light emitting diodes LEDs and a plurality of photodiodes PDs. The plurality of PDs are distributed around the plurality of LEDs in a surrounding structure. Each LED is configured to emit light signals. The LED is a tricolor integrated LED in which red light, green light, and infrared light are combined, and the light signals include a green light signal, a red light signal, and/or an infrared light signal. Each PD is configured to: receive the light signals, and transmit the light signals to the processor. The processor is configured to obtain a heart rate feature, a blood oxygen feature, and/or a respiration rate feature based on the light signals received from the plurality of PDs.