Abstract: This application provides a device tracking detection method and an electronic device, and is related to the field of terminal technologies. Because when the first electronic device receives a first Bluetooth signal based on a first signal filter, it implies that a first Bluetooth peripheral is near the first electronic device; and because the first Bluetooth peripheral broadcasts the first Bluetooth signal only once every other second duration, it also implies that the first Bluetooth peripheral may be near the first electronic device within the second duration during which the first Bluetooth signal is received based on the first signal filter. Therefore, when a moving speed is greater than a preset speed threshold, recorded trajectory information of the first Bluetooth peripheral includes not only location information of the first electronic device when receiving the first Bluetooth signal, but also location information of the first electronic device within the second duration.

Abstract: Lane line attribute detection methods and apparatuses, electronic devices, and intelligent devices are provided.

Abstract: A power capacitor and a manufacturing method thereof are disclosed. The power capacitor comprises a core installed in major insulation and at least two terminals connected with an external circuit. The core comprises a plurality of welding components mutually overlapped together, each of which comprises a plurality of capacitive elements. Each capacitive element is wound by two aluminum foils and two sets of thin films. Two aluminum foils of each capacitive element are provided with two electrodes extending in opposite directions respectively from the edges of the thin film, and the size a of each electrode is 10 mm to 15 mm. Various capacitive elements inside each welding component are electrically connected through a first batch of multilayer jointly-welded ultrasonic welding structures. Various welding components are electrically connected through a second batch of multilayer jointly-welded ultrasonic welding structures.