Abstract: The disclosure belongs to a technical field related to metamaterials and discloses a multi-scale three-dimensional pentamode metamaterial and an additive manufacturing method thereof. The multi-scale three-dimensional pentamode metamaterial has a body centered cubic (BCC) structure and includes a plurality of rods and a plurality of node structures. Two ends of each of the rods are connected to the node structures. Each of the rods has a cylindrical shape and is provided with a biconical through hole. From one end of the rod towards the other end of the rod, a diameter of the biconical through hole gradually decreases and then gradually increases. A chamber is formed inside each of the node structures, the biconical through hole communicates with the chamber, and the chamber is filled with a lattice structure.

Abstract: The disclosure belongs to a technical field related to metamaterials and discloses a multi-scale three-dimensional pentamode metamaterial and an additive manufacturing method thereof. The multi-scale three-dimensional pentamode metamaterial has a body centered cubic (BCC) structure and includes a plurality of rods and a plurality of node structures. Two ends of each of the rods are connected to the node structures. Each of the rods has a cylindrical shape and is provided with a biconical through hole. From one end of the rod towards the other end of the rod, a diameter of the biconical through hole gradually decreases and then gradually increases. A chamber is formed inside each of the node structures, the biconical through hole communicates with the chamber, and the chamber is filled with a lattice structure.

Abstract: Embodiments of the present disclosure disclose a method and apparatus for planning a route. A specific embodiment of the method includes: acquiring task information; generating initial route information based on the task information; performing the updating step including: updating the second sequence in the second sequence set based on a preset rule; updating the first sequence in the first sequence set based on the updated second sequence set; and determining a delivery cost of the delivery unit based on the updated first sequence set and the updated second sequence set; and the method further includes: determining, based on the updated first sequence set and the updated second sequence set, a route of the to-be-delivered items delivered from the initial node to the destination node via the intermediate node, in response to the determined delivery cost meeting a preset delivery cost condition.

Abstract: Embodiments of the present disclosure disclose a method and apparatus for planning a route. A specific embodiment of the method includes: acquiring task information; generating initial route information based on the task information; performing the updating step including: updating the second sequence in the second sequence set based on a preset rule; updating the first sequence in the first sequence set based on the updated second sequence set; and determining a delivery cost of the delivery unit based on the updated first sequence set and the updated second sequence set; and the method further includes: determining, based on the updated first sequence set and the updated second sequence set, a route of the to-be-delivered items delivered from the initial node to the destination node via the intermediate node, in response to the determined delivery cost meeting a preset delivery cost condition.