Abstract: A method of preparing PAN-based carbon fibers relates to the technical field of materials. The method includes: S1. acrylonitrile, a second monomer and an unsaturated UV-sensitive cross-linking agent are mixed, an initiator is then added and a reaction is performed to obtain a meltable PAN-based copolymer; S2. the meltable PAN-based copolymer and a flow modifier are mixed to obtain a mixture, the mixture is extruded and pelletized, and then melt spinning is performed to obtain nascent fibers, the nascent fibers are stretched and annealed to obtain a PAN-based carbon fiber precursor; S3. ultraviolet irradiation is performed on the PAN-based carbon fiber precursor; S4. the PAN-based carbon fiber precursor after ultraviolet irradiation is pre-oxidized and carbonized to obtain PAN-based carbon fibers.

Abstract: An electronic device may be provided with an antenna having a resonating element and a light source module mounted to a flexible printed circuit and a metal cowling. The module may emit light through a rear housing wall. The printed circuit may be interposed between the metal cowling and a conductive support plate in the rear housing wall. The printed circuit may include a ground trace coupled to the resonating element. A dimpled pad may couple the ground trace to the support plate. Compressive foam may be used to exert a force against the flexible printed circuit that presses the dimpled pad against the conductive support plate. The ground trace and the dimpled pad may form a return path to ground for the resonating element. The dimpled pad may occupy less height within the device than other structures such as metal springs.

Abstract: The utility model discloses a top side beam of a container, which has a web plate that extends vertically along a height direction of the container, to increase a vertical height of the top side beam to above 100 mm. The utility model further discloses a container having the top side beam according to the utility model. The top side beam according to the utility model can effectively resist external impact, and it has a good protection function to prevent the container from being damaged by an external force and then improve the overall strength of the container, thereby avoiding that the container body is punctured and ensuring integrity and security of goods in the container. In addition, the top side beam of the container according to the utility model has a simple structure, is easy to manufacture, and facilitates convenient modification of the container.

Abstract: The utility model discloses a top side beam of a container, which has a web plate that extends vertically along a height direction of the container, to increase a vertical height of the top side beam to above 100 mm. The utility model further discloses a container having the top side beam according to the utility model. The top side beam according to the utility model can effectively resist external impact, and it has a good protection function to prevent the container from being damaged by an external force and then improve the overall strength of the container, thereby avoiding that the container body is punctured and ensuning integrity and security of goods in the container. In addition, the top side beam of the container according to the utility model has a simple structure, is easy to manufacture, and facilitates convenient modification of the container.

Abstract: The utility model discloses a top side beam of a container, which has a web plate that extends vertically along a height direction of the container, to increase a vertical height of the top side beam to above 100 mm. The utility model further discloses a container having the top side beam according to the utility model. The top side beam according to the utility model can effectively resist external impact, and it has a good protection function to prevent the container from being damaged by an external force and then improve the overall strength of the container, thereby avoiding that the container body is punctured and ensuning integrity and security of goods in the container. In addition, the top side beam of the container according to the utility model has a simple structure, is easy to manufacture, and facilitates convenient modification of the container.