37results about How to "No cross" patented technology

The present application relates to the technical field of network topology, in particular to a node layout method and device. The method includes: obtaining the information of each node and the association relationship between each node; determining a number of target nodes that have an association relationship with other nodes, and respectively determining the levels to which the number of target nodes belong in the network topology, wherein the n+1th level The parent node of the target node is the target node of the nth level; according to the order from the bottom to the upper level, in the network topology view based on the preset layout rules, perform the following operations on the target nodes included in each level in turn: The target nodes included in the level are grouped, and the target nodes with the same parent node are divided into a group, and the arrangement order of the groups included in the m level is determined according to the arrangement order of the groups in the m+1 level, and according to the preset The arrangement rule determines the position of each target node included in each group in the network topology view.

A four-resonance terahertz band metamaterial based on a double ELC asymmetric coupling structure belongs to the technical field of electromagnetic wave full vector transmission control devices. The invention includes a substrate dielectric substrate and a metal structure layer arranged on the surface of the substrate dielectric substrate. There are M*N resonant units with the same structure periodically arranged on the metal structure layer. M and N are natural numbers and M≥2, N≥2. It is characterized in that each resonant unit has two openings and different lengths of metal arms. The resonator combination constitutes, and the resonator is determined according to the following conditions: in the simulation state of a single resonator, the first resonator has three resonance peaks, and the second resonator has two resonance peaks; In a state, the resonance unit has four resonance peaks; the resonance peaks are signal peaks with a transmittance lower than -15dB. The present invention utilizes micro-nano manufacturing technology for processing, and compared with realizing the terahertz reflective polarizer by ion etching, electro-optic crystal and other structures, the present invention has simple structure, small volume, low processing cost and high controllable precision.

The invention relates to a four-T-shaped three-dimensional bridge of a modern city. The conventional overpass only has upper and lower structures, although a part of the overpass has a three-layer structure, the requirement of the rapid growth of automobiles cannot be met. The four-T-shaped three-dimensional bridge comprises a viaduct bridge (1), wherein a middle truss bridge (6), a ground road (9) and a underpass are positioned below the viaduct bridge; four layers of road surfaces are provided; and the viaduct bridge, the middle truss bridge, the ground road and the underpass are in a T shape, and a straight-in road and a left-side turn road or a right-side turn road which differ by 90 degrees are arranged among the four bridge floors.

The invention relates to a conical surface enveloping cone worm pair and a manufacturing method thereof, and belongs to the technical field of offset worm transmission. The conical surface envelopingcone worm pair comprises an enveloping cone worm and a cone worm wheel, the spiral surface of the enveloping conical worm is an expandable curved surface, the expandable curved surface is ground to beformed by the disc-shaped conical surface grinding wheel, and the enveloping cone worm is meshed with the bevel gear wheel; the conical surface enveloping cone worm pair is suitable for occasion of axis orthogonal staggered or axis non-orthogonal staggered with the transmission ratio of i 12 being greater than or equal to 10; and the manufacturing method of the conical surface enveloping cone worm pair comprises the following steps that 1, coordinate parameters of a to-be-manufactured enveloping cone worm are set, 2, the enveloping conical worm is manufactured, 3, the coordinate parameters ofthe to-be-manufactured are set, 4, a cone worm wheel is manufactured, and 5, the conical surface enveloping cone worm pair is assembled. The tooth surfaces of the conical surface enveloping cone wormpair are not prone to causing curvature interference, the number of the suitable worms is multiple, the range of the transmission ratio is wide, the distribution of the instantaneous contact lines isuniform, sparse and cross-free, heat dissipation and lubrication are facilitated, the bearing capacity is high, the transmission efficiency is high, and the service life is long.

Aiming at the track planning problem of multi-UAV reconnaissance line target, the present invention proposes a line target-oriented UAV reconnaissance track planning method. First, on the basis of considering the characteristics of the target, the trajectory planning model of multi-UAV reconnaissance line target with time cost as the objective function is established. Then, the way the standard genetic algorithm is coded is optimized to ensure that all targets are scouted at most once. Finally, in order to improve the convergence speed of the algorithm, the crossover operation and mutation operation are designed reasonably. The simulation results show that the algorithm can effectively solve the problem of track planning for multi-UAV reconnaissance line targets, and the convergence speed is fast.