Abstract: Embodiments of the present disclosure provide an amplitude and phase calibration method and device, a storage medium, and an electronic device. The method includes: receiving a plurality of signals to be calibrated, with the plurality of signals to be calibrated being signals of one or more digital channels; routing the plurality of signals to be calibrated to a plurality of basic units, with each of the basic units configured to process one of the signals to be calibrated; and performing amplitude and phase calibration on the plurality of signals to be calibrated by the plurality of basic units.

Abstract: An optical amplifier includes a pump light source, a coupler, a gain medium, and a gain flattening filter. A gain curve of the optical amplifier is symmetric relative to a target gain curve. Distortion states of any two symmetric gain curves are opposite. The pump light source is configured to provide pump light. The coupler is configured to couple the pump light to the gain medium. The gain medium is configured to amplify, based on the pump light, signal light input to the optical amplifier. The gain flattening filter is configured to filter the amplified signal light, and output the filtered signal light.

Abstract: An LED lighting assembly includes an emitting-light apparatus, an inserting apparatus connected electrically to the emitting-light apparatus and a base cover received the emitting-light apparatus. The emitting-light apparatus includes a PCB and at least one LED unit welded on the PCB. The inserting apparatus includes a pedestal and at least two connecting springs received in the pedestal. The base cover has a first side groove and a second side groove. The two ends of the bottom of the base cover have a fixing gap and an inserting slot. The emitting-light apparatus is inserted into the second side groove, the inserting apparatus are inserted into the first side groove, the bottom of the pedestal is received in the fixing gap. The LED lighting assembly can link with another the same, and the distances of the LED units adjacent to other are same.

Abstract: An LED lighting assembly includes an emitting-light apparatus, an inserting apparatus connected electrically to the emitting-light apparatus and a base cover received the emitting-light apparatus. The emitting-light apparatus includes a PCB and at least one LED unit welded on the PCB. The inserting apparatus includes a pedestal and at least two connecting springs received in the pedestal. The base cover has a first side groove and a second side groove. The two ends of the bottom of the base cover have a fixing gap and an inserting slot. The emitting-light apparatus is inserted into the second side groove, the inserting apparatus are inserted into the first side groove, the bottom of the pedestal is received in the fixing gap. The LED lighting assembly can link with another the same, and the distances of the LED units adjacent to other are same.

Abstract: Combustion chamber assembly of direct injection diesel engine comprising a cylinder head, a cylinder liner, an injection nozzle and a piston with a combustion chamber on its top. An air flow guide ring is provided in the combustion chamber assembly. The guide ring is arranged under and adjacent to the bottom surface of the cylinder and around the nozzle. The front end of the nozzle protrudes from the bottom of the guide ring. The peripheral surface of the guide ring acts as an air flow guide surface to lead the air squish. The air flow guide surface inclines in relation to the bottom surface of the cylinder head and its inclination angle is in the range of 30-70 degrees.