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The invention discloses an airport pavement engineering three-dimensional model modeling method, system and device and a storage medium, and the method comprises the steps: obtaining elevation characters, terrain grids and flatness range boundary geometric information in an airport pavement engineering CAD two-dimensional drawing, and creating a three-dimensional terrain based on Revit; configuring road surface structure design parameters in the three-dimensional terrain; obtaining all region filling conforming to a specific layer naming rule, and based on Boolean operation, performing region filling in the three-dimensional terrain to generate a pavement structure; obtaining pavement sign information, and projecting in the three-dimensional terrain to generate a pavement sign; the method comprises the following steps: acquiring geometric information of a plate seam line, generating a closed outer contour of each pavement plate according to a pavement structure, generating pavement blocks in a three-dimensional terrain, and obtaining angular point positioning points of the blocks; generating a slab joint according to the projection of the block corner positioning points in the three-dimensional terrain; and according to projection of the block corner positioning points in the three-dimensional terrain and calculation, a dowel bar is generated, and establishment of the airport pavement engineering three-dimensional model is completed.

The application relates to a full-mechanical automatic tracking self-balancing variable current voltage stabilizing device and a use method thereof, which comprises a main pipe and two gear connecting rod combined mechanisms arranged on the two sides of the main pipe respectively; the gear connecting rod combined mechanism comprises a bellows, a pressing plate pressed on one end of the bellows far from a water inlet pipe, and a pressing rod pressed on the hose; one end of the bellows is sealingly connected with the pipe wall of the water inlet pipe, the other end is sealingly fixedly connected with the pressing plate, a supporting rod extending away from the bellows is fixed on the pressing plate, a spring is connected with one end of the supporting rod far from the pressing plate, and the other end of the spring far from the supporting rod is fixedly arranged; the gear connecting rod combined mechanism further comprises a driving gear and a driven gear which are mutually meshed. The application changes the flow area of the hose through the gear transmission mechanism of each connecting rod and the expansion and contraction of the bellows when the water pressure changes, so that the flow is stored and the pressure is increased when the pressure is low, the municipal end water pressure is prevented from being lower than the minimum allowable value due to excessive secondary water supply and water taking, no external power is needed, and the automatic tracking and self-balancing functions are achieved.