Abstract: Provided are an organic electroluminescent material and a device. The organic electroluminescent material is a compound having a structure of Formula 1 and can be used as a host material in an organic electroluminescent device. These new compounds can provide better device performance such as high efficiency and unexpected improvement in lifetime. Further provided are an organic electroluminescent device comprising the compound, a compound composition comprising the compound and an electronic device comprising the compound.

Abstract: The present disclosure discloses a laser detection method for port machinery equipment including: providing with a laser radar device: selecting a suitable laser radar device and installing on the port machinery, ensuring that an installation position and angle of the device can provide a good detection range and field of view; emitting and receiving laser: emitting a laser beam and receiving reflected light signals by the laser radar device, emitting a pulsed laser beam by the laser radar device, forming a narrow beam of laser by focusing with an optical component. The laser detection method uses a Velodyne® VLP-32C infrared laser, which has high resolution and a large number of detection points, can provide high-precision laser data to more accurately describe a port environment and target objects. Through a PointNet++deep learning mode, global perception and analysis of laser data can be carried out to obtain target object information.

Abstract: A caulking gun includes a push disk, a push rod, an adhesive cartridge compartment, a trigger and a gun body; the trigger is hingedly coupled to the middle part of the gun body; the rear end of the push rod is outside the gun body and provided with a braking device; the front end is in the adhesive cartridge compartment through the gun body and provided with a push disk; a push piece for driving the push rod is mounted in the gun body; the front end of the push piece is provided with a return spring; the trigger is provided with a pin position switching device for adjusting the propulsion ratio by adjusting the contact position of the push piece; adjustment of different propulsion ratios enables the caulking gun to be multifunctional to meet the construction requirements of different adhesives.

Abstract: A caulking gun includes a push disk, a push rod, an adhesive cartridge compartment, a trigger and a gun body; the trigger is hingedly coupled to the middle part of the gun body; the rear end of the push rod is outside the gun body and provided with a braking device; the front end is in the adhesive cartridge compartment through the gun body and provided with a push disk; a push piece for driving the push rod is mounted in the gun body; the front end of the push piece is provided with a return spring; the trigger is provided with a pin position switching device for adjusting the propulsion ratio by adjusting the contact position of the push piece; adjustment of different propulsion ratios enables the caulking gun to be multifunctional to meet the construction requirements of different adhesives.