6 results about "Populated area" patented technology

This invention relates to a method and system for delineating atmospheric environmental control zones based on GIS-big data, comprising: acquiring and processing ground monitoring data, satellite remote sensing data, and meteorological data of a target area; constructing a pollutant concentration prediction model; and predicting future pollutant concentrations in the target area using the pollutant concentration prediction model; simulating the diffusion and deposition processes of pollutants using processed meteorological data and topographic data of the target area, and constructing a dynamic distribution map of pollutants based on future pollutant concentrations; detecting temperature inversion phenomena in the dynamic distribution map of pollutants and marking pollutant accumulation areas; and delineating the boundaries of atmospheric environmental control zones based on the dynamic distribution map of pollutants and pollutant accumulation areas, combined with ecologically sensitive areas, industrial pollution sources, and densely populated areas of the target area. This invention enables the spatiotemporal fusion of multi-source heterogeneous data, improves the accuracy of pollutant concentration estimation, and provides strong support for refined monitoring and scientific management of air pollution.

The invention provides a remote sensing image cultivated land plot drawing method and system, a medium and a product. In the method, a server determines a grid cultivated land range based on a cultivated land block gray level extraction result map or cultivated land range auxiliary data. Then, the server masks the cultivated land block gray level extraction result by using the cultivated land range to obtain cultivated land block pattern spots, and the pattern spots with the large shape abnormal degree are recognized and removed according to the geometric morphology of the cultivated land block pattern spots and are converted into areas to be filled; and meanwhile, pattern spots with relatively small form abnormal degree are subjected to form regularity optimization, and the regularity is improved. And then, the server fills the to-be-filled area by using the regularized pattern spots to reduce the crushing degree of the land parcels. And finally, the server not only ensures the leakproofness between the plots, but also improves the smoothness of the outer boundary of the plot by distinguishing the inner contour from the outer contour and applying differentiated simplified parameters, thereby generating a farmland plot vector result graph which is regular in shape, accurate in boundary and free of topological errors.

This invention belongs to the field of river and lake management technology, specifically relating to a method and system for calculating earthwork volume in river and lake management projects based on dynamic BIM. The method includes: marking the area between adjacent turning nodes as assessment sub-regions; calculating the total offset within each assessment sub-region, and marking it as an excavation or filling area based on the sign of the total offset; projecting the filling and excavation surfaces in the engineering planning scheme onto each assessment sub-region to construct excavation and filling models; calculating the excavation and filling volumes within each assessment sub-region based on the excavation and filling models, and calculating the total earthwork volume. This invention can effectively identify and correct data anomalies, provide a regional basis that conforms to actual terrain characteristics, and improve the rationality of earthwork volume allocation.

The invention relates to the technical field of municipal engineering, and discloses a device for preventing and controlling blowout of a municipal drainage pipeline and a drainage pipeline system.The device comprises an underground drainage pipeline, a first vertical shaft and a second vertical shaft, and the underground drainage pipeline is used for allowing water to flow through in the drainage direction; the first vertical shaft is used for communicating the underground drainage pipeline with the ground atmosphere of the open area, and the diameter of the first vertical shaft is set to be 1.2-1.5 times of the diameter of the underground drainage pipeline; the second vertical shaft is used for communicating the underground drainage pipeline with the ground atmosphere of a densely-populated area, the middle of the second vertical shaft is arranged to be a diameter-expanding impedance part, the other part of the second vertical shaft is arranged to be a small-diameter part, the diameter of the diameter-expanding impedance part is arranged to be one to two times that of the underground drainage pipeline, and the diameter of the small-diameter part is smaller than that of the underground drainage pipeline; according to the invention, the overall safety of the drainage pipeline system can be ensured, especially the occurrence probability of blowout accidents can be reduced by about 80%, and the gas emission efficiency can be improved by about 80%.

This invention discloses a method, apparatus, device, and storage medium for generating low-altitude flight paths, belonging to the field of low-altitude flight technology. The method includes: acquiring a three-dimensional spatial model of the target area and its population density distribution; determining the path cost of each voxel based on its population density at the ground projection of each voxel in the three-dimensional spatial model, the obstacle status of each voxel, and the distance between each voxel and the target facility; and performing path planning with a first position in the three-dimensional spatial model as the starting point and a second position in the three-dimensional spatial model as the ending point, aiming to minimize the sum of the path costs of the voxels traversed between the first and second positions, thereby obtaining the target low-altitude flight path. This solution allows low-altitude aircraft to stay away from densely populated areas, avoid obstacles as much as possible, and fly according to the instructions of the target facility in the target area, while ensuring flight efficiency and safety.

The invention provides an underground cavity tomography method based on a city existing infrastructure excitation source, and relates to the field of underground detection, and the method comprises the steps: collecting an excitation source, and constructing an original observation sequence; extracting the characteristics of the excitation source through a time-frequency analysis method based on the preprocessed data, and constructing an excitation source characteristic sub-library; aligning the original observation sequence according to the excitation source occurrence time, and obtaining a waveform data set by adopting pulse response estimation; carrying out frequency dispersion chromatography inversion based on the waveform data set to obtain a rigidity or wave velocity abnormal body; and performing probability fusion on the anomalous body, constructing a voxel-level probability distribution model, and combining a preset probability threshold and a geometric constraint condition to generate a targeted review list and a routing inspection path. The technical scheme of the invention is suitable for underground cavity rapid general survey, fine review and risk assessment scenes of urban roads, pipe gallery corridors and pipe network dense areas.