Abstract: The present application provides a liquid crystal composition and a liquid crystal optical element containing the same, where the liquid crystal composition includes at least one compound of formula I, at least one compound of formula II, at least one compound of formula III, and/or at least one compound of formula IV. The liquid crystal composition may further include a chiral agent and a photosensitizer. The present invention further provides a liquid crystal optical element including the liquid crystal composition of the present invention. By using the liquid crystal composition of the present invention to fabricate a liquid crystal optical element, the difficulty of the fabrication process for a polymerizable cholesteric liquid crystal optical element can be reduced, and the diffraction efficiency of the optical element can be improved.

Abstract: Embodiments of this application provide a system for preparing an optical waveguide lens. Primarily, multi-beam splitting processing is performed on an exposure beam, and beams in different directions are made to interfere pairwise, thereby meeting multi-grating exposure requirements, enabling one-step formation of an in-coupling grating, a turning grating, and an out-coupling grating, reducing preparation time, and particularly improving production efficiency in large-scale production processes.

Abstract: A device, method, and a data storage medium, configured to enhance an item access bandwidth and atomic operation are provided. The device comprises: a comparison module, a cache, and a distribution module; wherein the comparison module is configured to receive a query request from a service side, determine whether an address pointed to by the query request and an item address stored in the cache are identical. If so, and a valid identifier vld is valid, the comparison module is configured to directly return the item data stored in the cache to the service side without initiating a request for looking up an off-chip memory, so as to reduce a frequency of accessing the off-chip memory. If not, the comparison module is configured to initiate a request for looking up the off-chip memory, so as to process, according to a first preconfigured rule, item data returned by the off-chip memory.

Abstract: A method and device for updating a routing lookup tree are provided. When it is determined that a routing lookup tree needs to be updated, a layer update indication table and node update information are determined according to updated entries; a layer is selected from the routing lookup tree as a current layer in sequence according to levels of layers, and if it is determined that the current layer needs to be updated according to the layer update indication table, the previous layer of the current layer in the routing lookup tree is locked, the node update information is synchronized to the current layer in the routing lookup tree, and so on, until it is determined that the current layer is the last layer needing to be updated according to the layer update indication table, and then this update of the routing lookup tree is ended.

Abstract: A method and device for updating a routing lookup tree are provided. When it is determined that a routing lookup tree needs to be updated, a layer update indication table and node update information are determined according to updated entries; a layer is selected from the routing lookup tree as a current layer in sequence according to levels of layers, and if it is determined that the current layer needs to be updated according to the layer update indication table, the previous layer of the current layer in the routing lookup tree is locked, the node update information is synchronized to the current layer in the routing lookup tree, and so on, until it is determined that the current layer is the last layer needing to be updated according to the layer update indication table, and then this update of the routing lookup tree is ended.