135 results about "Topographic relief" patented technology

The invention provides a predication method of a happening position of a slump disaster after an earthquake based on multiple factors. The method comprises the following steps: obtaining a plurality of basic geographical parameters of a space to be predicated, a road parameter, a plurality of geological parameters, an earthquake parameter, a geographic position of at least one known slump point and geographic positions of a plurality of points which are not slumped; calculating a Newmark displacement amount Dn based on a Newmark displacement model; constructing a binary Logistic regression equation by a distance from a predicated position to a river, a distance from the predicated position to a fault zone, a topographic relief level and a distance from the predicated position to a road; calculating a partial regression coefficient of respective variable factor in the regression equation by taking all the parameters of the known slump point and the points which are not slumped, and the calculated Newmark displacement amount Dn as known conditions; and utilizing the calculated partial regression coefficient to construct a slump disaster predication model of the space to be predicted.

The invention discloses a low-altitude flight control method applied to airborne geophysical prospecting of an unmanned aerial vehicle. The low-altitude flight control method includes adopting complementary filter of pressure altitude and radio altitude of the unmanned aerial vehicle to obtain altitude signals with high signal to noise ratio as a low-altitude flight height control source of the unmanned aerial vehicle. High-frequency topographic influence can be filtered by flight altitude, terrain can be well tracked, and airborne geophysical prospecting flight operation can be realized effectively in hills and small-gradient mountainous areas, so that the unmanned aerial vehicle can fly at minimum altitude along topographic relief, track the terrain and effectively avoid obstacles and is capable of acquiring high-quality exploration data of an airborne geophysical prospecting operation aeromagnetic system and an airborne radioactive system, and geophysical prospecting safety is improved. Feasibility of the low-altitude flight control method is verified by practical tests, is completely succeeded and has pilot application effect for relevant flight control methods and creates basis for massive airborne geophysical prospecting application in the unmanned aerial vehicle.

The invention provides a predication method for predicating a collapse disaster position after earthquake. The predication method comprises the steps that multiple basic geographic parameters, multiple geological parameters, earthquake parameters, the geographic position of at least one known collapse site and the geographic positions of multiple non-collapse sites of the space to be predicted are obtained; Newmark displacement Dn is computed on the basis of the Newmark displacement model; a binary Logistic regression equation is constructed according to the distance between the predicted position and a river, the distance between the predicted position and a fracture zone, the topographic relief and the Newmark displacement Dn; by taking the parameters of the known collapse site and the non-collapse sites and the computed Newmark displacement Dn as the known conditions, the partial regression coefficient of each independent variable factor in the regression equation is computed; and the computed partial regression coefficients are utilized to construct the collapse disaster prediction model of the space to be predicated.

The invention relates to a method for obtaining geometrical parameters of typical terrains in a digital map. The method includes the steps of terrain classification and recognition, terrain simplification, extracting of the geometrical parameters of the terrains and the like. According to the digital map in the GeoTIFF format in the ASTER GDEM type, by means of an ArcGIS tool, the normalized elevation, the normalized gradient, the normalized gradient variability, the normalized curvature and the normalized terrain undulation are calculated, iterative selforganization (ISO) unsupervised clustering is carried out with the obtained parameters as characteristic indexes, and the preliminary classification of the terrains is obtained; then the terrains are classified into the plain, the hill, the low mountain, the medium mountain, the high mountain and the like according to the average undulation of the various terrains; the geometrical parameters such as the positions, the bottom faces and the heights of the typical terrains are finally obtained. The method has the advantages of being feasible and practical.

The invention relates to an SAR (synthetic aperture radar) image orthorectification method based on a polynomial, which comprises the following steps of: calculating a relied displacement formed by topographic relief according to a geometrical relationship of slope distance imaging; correcting the relied displacement obtained by calculation; and correcting other factors influencing SAR imaging by utilizing a traditional SAR image polynomial correcting method. Through the SAR image orthorectification method based on the polynomial, the invention can carry out accurate geometry correction on areas with larger topographic relief; and moreover, the SAR image orthorectification method based on the polynomial is quite easy to implement and can achieve quite high precision. In addition, the method is not only suitable for satellite-borne SAR image orthorectification, but also suitable for airborne SAE image orthorectification.

The invention discloses a method for programming aerophotographic operation of UAV. The method comprises: under the constraint of a real overlapping ratio, performing iterative adjustment on a courseand positions of exposure points to obtain optimized reliable exposure points; generating a flight plan according to the exposure points; sending the flight plan to a flight control system of a UAV via communication; and after the flight control system receives the flight plan, performing an aerophotographic task according to positions of the exposure points in the plan. According to the method, under the constraint of a real overlapping ratio, topographic relief and DEM are taken into consideration, and a converging iterative adjustment algorithm and DEM elevation query technology are designed. Self-adaptive optimal adjustment of the course and positions of exposure points is achieved, the aerophotographic plan is guaranteed and accords with the expectation, and the aerial survey qualityand aerophotographic operation efficiency are improved.

The invention provides an ortho-rectification method of an automated medium resolution ratio satellite image, and particularly discloses an automation ortho-rectification method based on geometric deformation step resolving through which an ortho-rectification process of an image can be achieved fast and accurately in a region with obvious topography relief. The ortho-rectification method is built on the basis of analysis of the causes of geometric deformation in the imaging process of a remote-sensing image, different geometric deformation types are separated from one another, and step resolving is conducted to distortion caused by a conforming imaging system and distortion caused by topographic relief. Firstly, simulating irregular deformation caused by topographic relief through imaging simulation, wherein the simulate image serves as an automatic registration reference image, then rectifying confirming imaging system distortion with a polynomial model through an automatic registration method, and lastly resolving topographic deflection existing after target image registration. The automation ortho-rectification method based on geometric deformation step resolving is suitable for images shot by different sensors, other topographic deformation recorded in a lookup table is adopted in topography resolving aiming at different sensors, therefore, the computation speed of the whole rectification process is improved greatly, the ortho-rectification of the images is achieved automatically and effectively.

The invention relates to a geophysical prospecting two-dimensional electrical sounding data chromatography inversion processing technology and belongs to the technical field of geological exploration. Under the conditions of the same geoelectricity situation and the same polar distance, underground half-space current lines have the consistent distribution form, for a primary electric field, with the change of a supply current, the electric field strength and the current line density at each position under the ground are changed, but the relative ratio of the electric field strengths or the current line densities between points is not changed; and for a secondary electric field, when the excitation reaches a saturated state, attenuation curve characters are approximate. Different resistivity and polarizability properties are effectively distinguished; the theoretical formula derivation is carried out; sounding data layer-by-layer stripping coefficients of adjacent polar distances are solved; an inversion mathematical model is constructed; and the imitative resistivities, polarizabilities and corresponding depths are obtained. Due to the adoption of the chromatography processing, the influence of topographic relief can be inhibited, the resolution is improved, the multiplicity is reduced, the inversion efficiency is greatly improved, and a result is very close to the real geological condition. The geophysical prospecting two-dimensional electrical sounding data chromatography inversion processing technology is mainly applied to geophysical prospecting data processing interpretation in the field of geological exploration such as exploration of mineral resources, engineering geologic structures, exploration of water resources and the like.

The invention discloses a rural domestic sewage treatment device for a region with relatively large topographic relief. The rural domestic sewage treatment device comprises a baffled anoxic and anaerobic reaction ditch, a water-falling oxygenation ditch, an aerobic reaction ditch and a reinforcing wetland, wherein the baffled anoxic and anaerobic reaction ditch comprises a facultative section, an anoxic section and an anaerobic section which are partitioned through water-retaining walls and baffle walls; the water-falling oxygenation ditch is positioned at the downstream of the baffled anoxic and anaerobic reaction ditch; the water-falling oxygenation ditch comprises a water-falling platform, a water-receiving pond and an overflowing weir; the aerobic reaction ditch is positioned in the downstream of the water-falling oxygenation ditch, is communicated with the overflowing weir, and is constructed according to the natural shape of the ditch; the aerobic reaction ditch is provided with a suspended filler and an overflowing wall; the reinforcing wetland adopts a trapezoidal pond-shaped structure, and sequentially comprises an impermeable layer, a gravel cushion layer, a filtering material layer and a soil layer from bottom to top.

The invention discloses a restoration method for coal mine giant collapse pits. The method comprises the steps that whether the coal mine giant collapse pits are collapse pits in a zone with the relative height difference or collapse pits in a zone without the relative height difference are judged according to the topographic relief degree of the coal mine giant collapse pit, the collapse pits in the zone with the relative height difference and the collapse pits in the zone without the relative height difference are subjected to primary backfilling separately; water is sprayed to the giant collapse pits subjected to primary backfilling; and the collapse pits are subjected to secondary backfilling until the backfilling height in the pits is equal to the surface elevation. Through the mode that the collapse pits in the zone with the relative height difference adopts the different backfilling technologies, and solid waste backfilling is conducted in the relative low positions, so that the collapse pit governing efficiency is ensured, the bulldozing operation backfilling is conducted in the relative high positions, ground fractures around the collapse pits are restored, the collapse pits are backfilled, and the restoration effect of the collapse pits is ensured.

The invention provides a PDE-based magnetic measurement data equivalent source reduction-to-the-pole and type conversion method, which comprises the steps: S1, obtaining magnetic field data d0, and establishing a topographic relief curved surface according to topographic height information of an area where the magnetic field data are located; S2, determining a spatial range of mesh generation, andperforming non-uniform multilayer mesh generation; S3, according to the magnetic inclination angle, the magnetic declination angle and the magnetic induction intensity of the geomagnetic field, carrying out PDE three-dimensional inversion calculation with a depth regularization factor, a positive value constraint term and a regularization term on the magnetic field data d0 to obtain a multi-layerequivalent source model of a magnetic anomalous body; and S4, giving different geomagnetic pole parameters, and performing non-linear PDE magnetic field three-dimensional forward modeling calculationby using a multi-layer equivalent source model to obtain one or more of reduction-to-the-pole data, magnetic anomaly total field data, magnetic anomaly component data and magnetic gradient tensor data. The method has the beneficial effects that the underground magnetic anomaly data in a complex environment can be subjected to self-adaptive and high-precision reduction-to-the-pole and data type conversion calculation.