Abstract: A method and apparatus for multi-level target classification, a method and apparatus for traffic sign detection, an electronic device, and a computer storage medium are provided. The method for multi-level target classification includes: obtaining at least one candidate region feature corresponding to at least one target in an image, where the image includes at least one target, and each of the targets corresponds to one candidate region feature; obtaining at least one first probability vector corresponding to at least two classes based on the at least one candidate region feature, and classifying each of the at least two classes to respectively obtain at least one second probability vector corresponding to at least two sub-classes in the class; and determining a classification probability that the target belongs to the sub-class based on the first probability vector and the second probability vector.

Abstract: Embodiments of the present disclosure disclose a traffic light detection method and apparatus, an intelligent driving method and apparatus, a vehicle, and an electronic device. The traffic light detection method includes: obtaining a video stream including a traffic light; determining a candidate region of the traffic light in at least one frame of image of the video stream; and determining at least two attributes of the traffic light in the image based on the candidate region.

Abstract: A drilling apparatus (100) includes a drill bit (200), a heating assembly, a cooling assembly, and a digging assembly. The heating assembly is configured to rapidly heat a material to be drilled at a target location. The heating assembly includes one or more first discharge structures (520) configured to discharge a high-temperature substance at the target location of the material. The cooling assembly includes one or more second discharge structures (440) configured to discharge a low-temperature substance at the target location of the material. The digging assembly is configured to remove substrate from the material at the target location.

Abstract: Methods and systems for detecting and/or collecting particles are disclosed. At least some of the particles are electrically charged by a charger (122). At least some of the charged particles are collected by a collector (140). Information indicating the number of the detected/collected particles based on measured electrical charges of the charged particles is obtained by a processor (170).

Abstract: A paver includes an enclosed furnace for melting an inorganic paving material and a carriage for carrying the furnace. The furnace includes a heating chamber for receiving the paving material, a heater for heating the heating chamber to a temperature greater than 1,600° C. to melt the paving material, and an outlet for discharging melted paving material to form a paved road surface.

Abstract: A paver includes an enclosed furnace for melting an inorganic paving material and a carriage for carrying the furnace. The furnace includes a heating chamber for receiving the paving material, a heater for heating the heating chamber to a temperature greater than 1,600° C. to melt the paving material, and an outlet for discharging melted paving material to form a paved road surface.

Abstract: A drilling apparatus (100) includes a drill bit (200), a heating assembly, a cooling assembly, and a digging assembly. The heating assembly is configured to rapidly heat a material to be drilled at a target location. The heating assembly includes one or more first discharge structures (520) configured to discharge a high-temperature substance at the target location of the material. The cooling assembly includes one or more second discharge structures (440) configured to discharge a low-temperature substance at the target location of the material. The digging assembly is configured to remove substrate from the material at the target location.

Abstract: An illustrative filter includes an electret material, which has a long-lasting electric charge, that is at least partially coated or covered with a conductive layer. An optional insulation layer may be disposed over at least part of the conductive layer. If the electret material has a positive charge, then the filter attracts particles with a negative charge, and vice versa. The filter adsorbs the attracted particles until it becomes saturated with particles, at which point the conductive layer is charged to have a polarity that is opposite the built-in polarity of the electret and that matches the polarity of the adsorbed particles. The charged conduction layer repels the adsorbed particles from the filter, cleaning the filter for continued use.

Abstract: A paver includes an enclosed furnace for melting an inorganic paving material and a carriage for carrying the furnace. The furnace includes a heating chamber for receiving the paving material, a heater for heating the heating chamber to a temperature greater than 1,600° C. to melt the paving material, and an outlet for discharging melted paving material to form a paved road surface.

Abstract: Methods and systems for detecting and/or collecting particles are disclosed. At least some of the particles are electrically charged by a charger (122). At least some of the charged particles are collected by a collector (140). Information indicating the number of the detected/collected particles based on measured electrical charges of the charged particles is obtained by a processor (170).

Abstract: An illustrative filter includes an electret material, which has a long-lasting electric charge, that is at least partially coated or covered with a conductive layer. An optional insulation layer may be disposed over at least part of the conductive layer. If the electret material has a positive charge, then the filter attracts particles with a negative charge, and vice versa. The filter adsorbs the attracted particles until it becomes saturated with particles, at which point the conductive layer is charged to have a polarity that is opposite the built-in polarity of the electret and that matches the polarity of the adsorbed particles. The charged conduction layer repels the adsorbed particles from the filter, cleaning the filter for continued use.

Abstract: A paver includes an enclosed furnace for melting an inorganic paving material and a carriage for carrying the furnace. The furnace includes a heating chamber for receiving the paving material, a heater for heating the heating chamber to a temperature greater than 1,600° C. to melt the paving material, and an outlet for discharging melted paving material to form a paved road surface.