Abstract: Disclosed is a linear motor, including a mover and a stator which cooperate with each other. The mover includes mover iron cores arranged at intervals in a movement direction of the mover, and the stator includes permanent magnets arranged at intervals in the movement direction. Each of the mover iron cores includes an iron core yoke portion and an iron core tooth unit joined to each other. The iron core tooth unit defines an opening, and each of the permanent magnets is located at least partially within the opening.

Abstract: A method for aligning coordinate systems includes: in response to that a second terminal triggers alignment of the coordinate systems, obtaining, by the second terminal, map information stored in a cloud or obtaining, by the second terminal, the map information from a first terminal; and transforming, by the second terminal, a second coordinate system of the second terminal into an initial coordinate system corresponding to the map information stored in the cloud or obtained from the first terminal, or transforming, by the second terminal, the initial coordinate system corresponding to the map information stored in the cloud or obtained from the first terminal into the second coordinate system of the second terminal; herein the initial coordinate system is used for defining a positional relationship between the first terminal and the second terminal when the map information is in a sharing state.

Abstract: The disclosure relates to a method, apparatus and system for anchor sharing, an electronic device and a storage medium. The method for anchor sharing includes: receiving, by a server, an anchor sharing request from a terminal, wherein the anchor sharing request comprises information associated with a present scene scanned by the terminal and an identifier of a to-be-shared anchor acquired by the terminal; determining, by the server, shared position information of the to-be-shared anchor in the present scene according to the anchor sharing request; and transmitting, by the server, the shared position information to the terminal.

Abstract: Related are a localization method and apparatus based on a shared map, an electronic device and a storage medium. The method includes that: from global map data, including at least one key frame, of an image collected by a first terminal, local map data associated with the key frame are extracted; a present frame in an image collected by a second terminal is acquired; and feature matching is performed on the present frame and the local map data, and a localization result for the present frame is obtained according to a matching result. With the adoption of the present disclosure, multiple moving terminals can be accurately localized to each other in the shared map.

Abstract: The present disclosure discloses a method for safely preparing pimavanserin and tartrate thereof by using triphosgene. The synthesis route includes: Raw materials used in the method of the present disclosure are safe and inexpensive, thereby effectively reducing the production costs. The method of the present disclosure has mild reaction conditions, and avoids using phosgene, which is highly toxic and difficult to handle is avoided. Thus, the method is readily implemented industrially.

Abstract: The present disclosure discloses a method for safely preparing pimavanserin and tartrate thereof by using triphosgene. The synthesis route includes: Raw materials used in the method of the present disclosure are safe and inexpensive, thereby effectively reducing the production costs. The method of the present disclosure has mild reaction conditions, and avoids using phosgene, which is highly toxic and difficult to handle is avoided. Thus, the method is readily implemented industrially.