Abstract: Embodiments of this application provide a multi-channel beamforming method and apparatus. The method includes: determining a target downlink positive polarization beam and a target downlink negative polarization beam based on M preset weight sets, where each weight set includes a phase weight set and an amplitude weight set, different weight sets include a same amplitude weight set, different weight sets include different phase weight sets, and both a quantity of phase weights in the phase weight set and a quantity of amplitude weights in the amplitude weight set are determined based on a quantity of a plurality of channels, where M is an even number greater than 0; and obtaining a target downlink signal based on the target downlink positive polarization beam and the target downlink negative polarization beam.

Abstract: The present disclosure discloses a projection lamp for projecting a nebula and a starry sky comprising a housing, a light source assembly, a laser assembly, a rotating assembly, a control board, a base seat, and a power source port. The light source assembly and the laser assembly are disposed in the housing and penetrate through the housing, and the rotating assembly and the control board are disposed in the housing. The rotating assembly is configured to drive a rotating optical sheet and a diffraction sheet to rotate. The light source assembly comprises a light source board, a light reflecting cup, a fixed optical sheet, the rotating optical sheet, and a lens assembly. The light source board, the light reflecting cup, the fixed optical sheet, the rotating optical sheet, and the lens assembly are successively disposed along a path in which light rays emitted by the light source board move.

Abstract: The present disclosure discloses a lamp for projecting a nebula and a starry sky comprising a housing, a light source assembly, a laser assembly, a rotating assembly, a control board, a base seat, and a power source port. The light source assembly and the laser assembly are disposed in the housing and penetrate through the housing, and the rotating assembly and the control board are disposed in the housing. The rotating assembly is configured to drive a rotating optical sheet and a diffraction sheet to rotate. The light source assembly comprises a light source board, a light reflecting cup, the rotating optical sheet, and a lens assembly having a frosted surface with an array of protrusions. The light source board, the light reflecting cup, the rotating optical sheet, and the lens assembly are successively disposed along a path in which light rays emitted by the light source board move.

Abstract: The present disclosure discloses a lamp for projecting a nebula and a starry sky comprising a housing, a light source assembly, a laser assembly, a rotating assembly, a control board, a base seat, and a power source port. The light source assembly and the laser assembly are disposed in the housing and penetrate through the housing, and the rotating assembly and the control board are disposed in the housing. The rotating assembly is configured to drive a rotating optical sheet and a diffraction sheet to rotate. The light source assembly comprises a light source board, a light reflecting cup, the rotating optical sheet, and a lens assembly having a frosted surface with an array of protrusions. The light source board, the light reflecting cup, the rotating optical sheet, and the lens assembly are successively disposed along a path in which light rays emitted by the light source board move.

Abstract: The present disclosure discloses a projection lamp for projecting a nebula and a starry sky comprising a housing, a light source assembly, a laser assembly, a rotating assembly, a control board, a base seat, and a power source port. The light source assembly and the laser assembly are disposed in the housing and penetrate through the housing, and the rotating assembly and the control board are disposed in the housing. The rotating assembly is configured to drive a rotating optical sheet and a diffraction sheet to rotate. The light source assembly comprises a light source board, a light reflecting cup, a fixed optical sheet, the rotating optical sheet, and a lens assembly. The light source board, the light reflecting cup, the fixed optical sheet, the rotating optical sheet, and the lens assembly are successively disposed along a path in which light rays emitted by the light source board move.

Abstract: Embodiments of this application provide a multi-channel beamforming method and apparatus. The method includes: determining a target downlink positive polarization beam and a target downlink negative polarization beam based on M preset weight sets, where each weight set includes a phase weight set and an amplitude weight set, different weight sets include a same amplitude weight set, different weight sets include different phase weight sets, and both a quantity of phase weights in the phase weight set and a quantity of amplitude weights in the amplitude weight set are determined based on a quantity of a plurality of channels, where M is an even number greater than 0; and obtaining a target downlink signal based on the target downlink positive polarization beam and the target downlink negative polarization beam.

Abstract: Disclosed is a submerged arc welding wire, comprising the following at mass percentage: 0.85-1.60% of Mo; 2.50-4.50% of Ni; 0.10-0.30% of Ti; 0.005-0.02% of B; 0.005-0.02% of REM; 1.60-2.00% of Mn; C which is greater than 0 and less than or equal to 0.06%; Si which is greater than 0 and less than or equal to 0.10%; P which is less than or equal to 0.008%; S which is less than or equal to 0.006%; and the balance being Fe. Also disclosed are a welding method and a weld metal. The welding process by the submerged arc welding wire and welding method and the welded welding joint have relatively high tensile strength and relatively good low temperature toughness, and the welding process has a relatively high welding speed, so that the requirements for X120 pipeline welding and pipe manufacturing can be satisfied.