Abstract: A method for determining a time length for developing a timing plan of traffic light control is disclosed. The method comprises the steps of: acquiring a first image at a preset time point before a red light of a traffic light is turned off, wherein the first image includes vehicles stopped at the red light; preprocessing the first image to generate a second image; extracting features from the second image by an artificial intelligence algorithm to generate a feature information, and determining a position relationship between vehicles on multiple lanes in the first image based on the feature information; and, determining the time length by the artificial intelligence algorithm according to the determined position relationship.

Abstract: A control method for traffic lights includes: acquiring an image at a preset time point before a red light is turned off, wherein the image includes at least one vehicle waiting for the red light; determining a time length according to the image, wherein the time length is generated by an artificial intelligence algorithm; and controlling a green light according to the time length.

Abstract: A long-distance PoE power sourcing equipment includes a PoE local power supply, a PoE remote switch, and a link cable linked therebetween. The PoE local power supply serves as a conversion medium between a network signal and a first transmission signal and sources a first DC power to the PoE remote switch through the link cable. The PoE remote switch serves as a conversion medium between the first transmission signal and a second transmission signal and converts the first DC power into a second DC power supplied to a PoE power device through an Ethernet cable. The power transmission implemented by the PoE local power supply and the link cable allows the data and power transmission distance of the PoE system to exceed the distance limitation of the Ethernet specification.