Abstract: The present invention provides a two-component polyurethane composition, and belongs to the technical field of high polymer material. The two-component polyurethane composition comprises component A and component B. According to mass percent, the component A comprises 0-100% of high activity polyether polyol, 0-100% of cross-linking agent, 0-40% of chain extender, 0-50% of plasticizer and 0-5% of catalyst; according to mass percent, the component B comprises 0-100% of diphenylmethane diisocyanate and derivative thereof, and 0-50% of plasticizer; and the mass ratio of the component A to the component B is 1:0.1-1:3. The two-component polyurethane composition provided by the present invention has low heat release and excellent mechanical properties.

Abstract: A signal processing method and device are provided. At least two channel sound signals are acquired, and a frequency-domain audio signal corresponding to each channel sound signal is acquired; beam forming output signals of a beam group corresponding to an audio signal of each frequency point are acquired; an output direction of the beam group is acquired; and time-domain sound signals output after beam forming in the output direction are acquired.

Abstract: A signal processing method and device are provided. At least two channel sound signals are acquired, and a frequency-domain audio signal corresponding to each channel sound signal is acquired; beam forming output signals of a beam group corresponding to an audio signal of each frequency point are acquired; an output direction of the beam group is acquired; and time-domain sound signals output after beam forming in the output direction are acquired.