Abstract: Disclosed is a method for evaluating the fatigue damage and life of a bridge structure under a multi-factor coupling effect. The method comprises the following steps: S1, reproducing complex service environment action values; S2, analyzing performance values of a bridge structure; S3, calculating coupling fatigue damage of a vulnerable part; and S4, predicting a remaining life of the bridge structure. By adopting the method, the fatigue damage condition and remaining life of an in-service bridge under a multi-factor coupling effect can be accurately evaluated, and the effect of each factor/action and the coupling effect the factors/actions in fatigue damage of a vulnerable part are quantitatively analyzed, thereby providing data support and decision-making reference for the operation and maintenance management, reinforcement and repair, and optimal design of bridges.

Abstract: The application relates to a dynamic visualization method and device for earthquake disasters. The method comprises: acquiring initial point cloud data of buildings and scenes in a target area; acquiring shake displacement data varying with time of the buildings by simulating an earthquake excitation on the buildings and the scenes; performing voxel downsampling and point cloud segmentation and extraction on the initial point cloud data to determine a ground point cloud and a point cloud of each building; updating in real time coordinates of each point of the point cloud of each building according to the shake displacement data; and rendering in real time the ground point cloud and the coordinates of each point of the point cloud of each building to generate a dynamic visual image for displaying. Accordingly, seismic scenes of regional buildings are presented more truly and visually, thus improving the visualization effect.

Abstract: A large-scale UAV mission planning method includes constructing an objective function and its constraints; initializing a mission sequence and inserting customers into the mission sequence with the smallest objective function value to obtain a plurality of initial mission sequences; iteratively performing the update operations on the plurality of initial mission sequences. Fast acquisition of optimal missions is achieved by the invention. This invention solves the existing problem of not being able to obtain the optimal mission due to the complex and time-consuming calculation method and the difficulty of convergence of the algorithm.

Abstract: The present disclosure relates to a radial piston hydraulic device distributing flow by pilot operated check valves and an operating method thereof. The radial piston hydraulic device includes a housing, a plurality of piston assemblies, a main shaft, first pilot operated check valves, second pilot operated check valves, and a valve plate. The first pilot operated check valves have a same number as the plurality of piston assemblies and are one-to-one corresponding to the plurality of piston assemblies. The second pilot operated check valves have a same number as the plurality of piston assemblies and are one-to-one corresponding to the plurality of piston assemblies. The radial piston hydraulic device can be used not only as the hydraulic motor, but also as a hydraulic pump, and can be used in a hydraulic system that need to realize power recovery functions.

Abstract: A four-quadrant radial piston hydraulic device includes a housing, plunger assemblies, an eccentric spindle rotatably disposed on the housing, pilot-operated check valves one-to-one corresponding to the plunger assemblies, two-way cartridge valves one-to-one corresponding to the plunger assemblies, a distribution shaft and a confluence plate. A reversing slide valve is disposed on the confluence plate. A working method of a four-quadrant radial piston hydraulic device is also provided. When the radial piston hydraulic device is used as a hydraulic motor and a hydraulic pump, it is capable of realizing two-way rotation, which solves a limitation of valve flow distribution in motor application.

Abstract: The present application relates to a multi-objective collaborative optimization approach for large-scale air traffic management, which belongs to the technical field of civil aviation management. The present application includes generating a delay time vector and a first delay time for each flight; grouping all the flights to get multiple flight groups based on the overlap of flight times; using a delay time vector of each flight in each flight group to generate a subspecies group, crossing each subspecies group to generate children in turn, obtaining a delay variable of each flight and make mutation, and after multiple evolutions, taking a solution as the second delay time of the corresponding flight, updating the first delay time of each flight to the second delay time, and the first delay time obtained after several cycles is used to control the departure time of the corresponding flight.

Abstract: A radial piston hydraulic device distributed by pilot operated check valves includes a housing, a plurality of piston assemblies, a main shaft, the rotating shaft, first pilot operated check valves having a same number with the plurality of piston assemblies and one-to-one corresponding to the plurality of piston assemblies, and second pilot operated check valves having a same number with the plurality of piston assemblies and one-to-one corresponding to the plurality of piston assemblies. The housing includes a plurality of piston chambers, a rotating shaft chamber, a high-pressure oil passage, and a low-pressure oil passage. Each of the plurality of piston assemblies is slidable up and down in a corresponding piston chamber of the plurality of piston chambers. The main shaft is rotatably connected to the housing and is connected to the plurality of piston assemblies in a transmission way.

Abstract: The present disclosure relates to a radial piston hydraulic device distributing flow by pilot operated check valves and an operating method thereof. The radial piston hydraulic device includes a housing, a plurality of piston assemblies, a main shaft, first pilot operated check valves, second pilot operated check valves, and a valve plate. The first pilot operated check valves have a same number as the plurality of piston assemblies and are one-to-one corresponding to the plurality of piston assemblies. The second pilot operated check valves have a same number as the plurality of piston assemblies and are one-to-one corresponding to the plurality of piston assemblies. The radial piston hydraulic device can be used not only as the hydraulic motor, but also as a hydraulic pump, and can be used in a hydraulic system that need to realize power recovery functions.

Abstract: A radial piston hydraulic device distributed by pilot operated check valves includes a housing, a plurality of piston assemblies, a main shaft, the rotating shaft, first pilot operated check valves having a same number with the plurality of piston assemblies and one-to-one corresponding to the plurality of piston assemblies, and second pilot operated check valves having a same number with the plurality of piston assemblies and one-to-one corresponding to the plurality of piston assemblies. The housing includes a plurality of piston chambers, a rotating shaft chamber, a high-pressure oil passage, and a low-pressure oil passage. Each of the plurality of piston assemblies is slidable up and down in a corresponding piston chamber of the plurality of piston chambers. The main shaft is rotatably connected to the housing and is connected to the plurality of piston assemblies in a transmission way.

Abstract: Disclosed is a self-centering viscous damper with pre-pressed ring springs. The self-centering viscous damper with pre-pressed ring springs comprises a first inner cylinder, a second inner cylinder, a third inner cylinder, an outer cylinder, a first end cover, a second end cover, a piston, a piston rod, a ring spring, a first connector, a second connector, a first linking nut, a second linking nut, a first outer cover, a second outer cover, a first end and a second end. Due to the interaction between the inner and outer cylinders, the ring springs are further pressed whether a damper is tensioned or pressed. The ring springs have been applied with pre-pressure which overcomes a frictional force and a restoring force when the ring springs are in an initial equilibrium position.

Abstract: An information processing method and apparatus, and a storage medium, the method including: on the basis of aggregated archive data, determining a target object; acquiring first capture image information of the target object; analysing the first capture information to obtain a first analysis result; and, on the basis of the first analysis result, determining a first trajectory of the target object.

Abstract: The present invention relates to the application of soilless cultivation such hydroponics or aquaponics cultivation. More particularly, the present invention relates to a method for producing a microbial-enhanced organic liquid fertilizer for hydroponic cultivation and a bioreactor system for producing the same. The method relates to produce high productivity and highly effective organic liquid fertilizer by using the bioreactor system.

Abstract: Disclosed is a self-centering viscous damper with pre-pressed ring springs. The self-centering viscous damper with pre-pressed ring springs comprises a first inner cylinder, a second inner cylinder, a third inner cylinder, an outer cylinder, a first end cover, a second end cover, a piston, a piston rod, a ring spring, a first connector, a second connector, a first linking nut, a second linking nut, a first outer cover, a second outer cover, a first end and a second end. Due to the interaction between the inner and outer cylinders, the ring springs are further pressed whether a damper is tensioned or pressed. The ring springs have been applied with pre-pressure which overcomes a frictional force and a restoring force when the ring springs are in an initial equilibrium position.

Abstract: A self-centering cable includes a restoring and energy-dissipation unit and a cable reinforcement connected to the restoring and energy-dissipation unit by a connecting unit. The restoring and energy-dissipation unit includes an outer trough, an axial tube provided in an opening at the upper end of the outer trough, two inverted U-shaped mild steel members provided side by side and fixedly mounted in the outer trough, an axial pallet sandwiched between and fixedly connected to the two inverted U-shaped mild steel members, and a disc spring set provided in the outer trough and sleeved onto the axial tube. The cable reinforcement includes a tensile reinforcement penetrating into a reinforcement bottom connector and a reinforcement top connector. The reinforcement bottom connector is connected to the axial tube, the top end connector, connected to the reinforcement top connector, and a bottom end connector are connected to a structure to be reinforced.

Abstract: A self-centering cable includes a restoring and energy-dissipation unit and a cable reinforcement connected to the restoring and energy-dissipation unit by a connecting unit. The restoring and energy-dissipation unit includes an outer trough, an axial tube provided in an opening at the upper end of the outer trough, two inverted U-shaped mild steel members provided side by side and fixedly mounted in the outer trough, an axial pallet sandwiched between and fixedly connected to the two inverted U-shaped mild steel members, and a disc spring set provided in the outer trough and sleeved onto the axial tube. The cable reinforcement includes a tensile reinforcement penetrating into a reinforcement bottom connector and a reinforcement top connector. The reinforcement bottom connector is connected to the axial tube, the top end connector, connected to the reinforcement top connector, and a bottom end connector are connected to a structure to be reinforced.

Abstract: The present disclosure relates to biocarriers with high microbial loading and durability useful for waste treatment, waste treatment systems comprising the same, and methods of use thereof.