100 results about "Land area" patented technology

The invention provides an adaptive CFAR detection method based on scene classification, and the method comprises the steps: carrying out the scene classification of an input SAR image through employing a K-means clustering algorithm, carrying out the target detection of a pure sea area obtained through classification through employing VI-CFAR, and carrying out the CFAR detection of a coastal area through employing a significance model. According to the method, the problems that a traditional CFAR algorithm is high in false alarm rate and unstable in detection performance in port and land complex backgrounds are effectively solved, detection parameters are optimized according to the complexity of different scene backgrounds, and therefore it is ensured that the CFAR algorithm can still maintain the constant false alarm rate in the sea clutter background, and the robustness of target detection is remarkably improved. The ocean area and the land area in the image are effectively distinguished, and the land area is shielded. According to the technical scheme, the problem that a traditional CFAR detection algorithm is interfered by a complex land background when detecting ships on the sea surface is solved.

The invention discloses a synthetic aperture radar sea surface wind field inversion method considering Doppler centroid anomaly, and the method comprises the following steps: obtaining vertical polarization SAR image data, and extracting a radar backscattering coefficient NRCS and an original Doppler centroid anomaly DCA related image; based on Doppler frequency data of the VV polarized SAR image, through quintic polynomial fitting and land area correction processing, DCA information caused by geophysical factors is extracted; acquiring actually measured wind speed data of the buoy, matching the actually measured wind speed data with an external background wind field, and performing nonlinear fitting correction by adopting an exponential function to obtain a corrected background wind field speed; constructing a variational analysis model containing an NRCS and DCA observation field, taking the corrected external wind field as a background field, and obtaining a wind speed field and a wind direction field through minimum cost function inversion; performing verification analysis on an inversion result by adopting buoy observation data subjected to space-time matching; the precision and reliability of the vector parameters of the sea surface wind field can be improved.

The invention provides a real-time simulation method, device and equipment based on multi-domain situation awareness and a storage medium, and the method comprises the steps: firstly obtaining data sources of a plurality of combat domains, and carrying out the preprocessing of the data source of each combat domain; wherein the data source comprises land domain data, sea area data, airspace data, sky domain data and network domain data; fusing the preprocessed data sources of the combat domains to generate unified multi-domain data, and constructing a simulation model based on the unified multi-domain data; experimental factors are obtained, the experimental factors are used for constructing multiple experimental schemes through an orthogonal test, the multiple experimental schemes are input into the simulation model to generate key indexes, and the key indexes comprise combat target achievement conditions, military strength consumption, combat time and resource consumption; and dynamically optimizing the key indexes, and outputting a combat decision scheme which can be used for reference of a command and control system. The problem that the decision of a command and control system is affected due to insufficient simulation precision is solved.

A permanent-temporary combined square block and caisson combined gravity type wharf comprises a land area rear storage yard, a temporary prefabricating yard used for prefabricating square blocks and caissons is arranged on the land area rear storage yard, the temporary prefabricating yard is communicated with square block structural sections through caisson shipping channels, and the square block structural sections are arranged along the coast and serve as caisson temporary shipping wharfs. The caisson shipping channel is used for transporting prefabricated square blocks and caissons; and after the caisson is transported out through the caisson shipping channel and the square structure section, the caisson is arranged to be connected with the square structure section into a whole, and the caisson structure section wharf is formed. According to the wharf, a site does not need to be additionally found to serve as a prefabrication yard and a temporary wharf as a construction site, and the temporary shipping wharf and part of the prefabrication yard are combined permanently and temporarily, so that wharf construction and dismantling cost can be saved.

The invention discloses an SAR sea surface flow field inversion method and system based on Doppler frequency shift correction, and belongs to the technical field of synthetic aperture radars. The method comprises the following steps: dividing an SAR single-view complex image into # imgabs0 # sub-image blocks; estimating the Doppler center frequency shift of each sub-image block; estimating distance deviation according to the polarization mode and the beam center visual angle; calculating a direct current offset according to the adjacent land area data; removing a non-geophysical item Doppler frequency shift error by combining the distance direction deviation and the direct current offset; doppler frequency shift caused by sea surface wind waves is calculated and removed, and a sea surface flow field is obtained. According to the method, the estimation precision of the Doppler frequency shift error of the non-geophysical item is improved, and the error of SAR sea surface flow field inversion is reduced. And meanwhile, the requirement of fitting a non-geophysical item Doppler frequency shift error on land area data is reduced, and the application scene of SAR sea surface flow field inversion is expanded.

The invention discloses a north pole sea ice concentration prediction method based on Swin Transform, and belongs to the technical field of remote sensing data analysis. According to the method, the land mask image is generated to shield the land area, the spatial-temporal feature processing is fused, and the Swin Transform network structure is utilized to reduce the model calculation amount and enhance the perception ability of the model to the spatial-temporal features, so that the model has relatively high robustness. According to the invention, through analyzing the temporal and spatial change rule of sea ice coverage, accurate prediction and monitoring of the sea ice concentration in a period of time in the future are realized, and a reliable decision basis is provided for the fields of shipping safety, resource development, ecological environment protection, marine resource management and the like of the arctic sea area.

The present invention relates to the technical field of area measurement, and discloses a land area surveying instrument for land improvement, which includes a horizontal calibration mechanism. A comparison measurement mechanism is installed on the top of the horizontal calibration mechanism. A height measurement mechanism is installed vertically in the middle of the comparison measurement mechanism. A searchlight mechanism is movably connected to the top of the height measurement mechanism; by providing the comparison measurement mechanism and the height measurement mechanism, the present invention is beneficial to adjusting the area size extended by the comparison measurement mechanism by pulling out the length extension plates and width extension plates that are movably inserted into the top and bottom sides of the inner cavity of the basic measurement plate laterally. The area is set as S1. Then, the searchlight mechanism moves up and down along the surfaces of the first lead screw and the two limit columns. The height between the bottom surface of the searchlight and the top surface of the basic measurement plate is L1, and the height between the bottom surface of the searchlight and the top surface of the reference plate is L2. Then, through the proportional relationship S1 / S2 = L1 / L2, S2 is calculated, which is the area of the land block.

The invention provides a deep ocean land area platform which comprises a functional device used for providing a production operation and living demand place on a deep ocean; the floating and sinking adjusting device is connected with the functional device and used for adjusting the functional device and sinking and floating of the functional device on the sea surface; the energy supply device is used for supplying electric energy to the functional device and the floating and sinking adjusting device; the tension leg mooring device is used for fixing the functional device, the floating and sinking adjusting device and the energy supply device at a preset sea area position, and the distance between the energy supply device and the floating and sinking adjusting device and the functional device is preset; the functional device, the floating and sinking adjusting device and the energy supply device are each provided with a cavity structure isolated from seawater and can float on the sea surface. The multiple floating devices with different functions and cavity structures are fixed to the ocean through the tension leg mooring devices, stable anchoring of the floating devices on the ocean is achieved, the stable and reliable deep ocean land area platform is constructed, and the extreme ocean environment can be resisted.

The invention discloses a measuring device for land area surveying and mapping, and belongs to the field of land area surveying and mapping. Which comprises a measuring instrument and is characterized in that the measuring instrument is installed on a support, the support comprises an installation base and a plurality of frame rods detachably connected to the installation base, each frame rod comprises a supporting rod, a clamping block and a bottom plate, the clamping blocks are fixed to the upper ends of the supporting rods, and the bottom plates are fixed to the lower ends of the supporting rods; a sleeve is fixedly arranged on the upper end face of the bottom plate, an inserting rod is connected in the sleeve in a sliding mode, a spring seat is connected to the periphery of the inserting rod in a rotating mode, a spring is fixed between the spring seat and the bottom plate, a limiting pin perpendicular to the axis direction of the inserting rod is fixed to the inserting rod, and the limiting pin can be clamped on the peripheral wall of the sleeve to limit movement of the inserting rod. The measuring device for surveying and mapping the land area has the beneficial effect that the measuring device for surveying and mapping the land area is relatively high in stability.

The drainage system comprises a first gate shaft, a second gate shaft and a third gate shaft which are connected in sequence, the upstream side of the first gate shaft is connected with a rainwater convergence connector, the downstream side of the first gate shaft is connected with an inlet of the second gate shaft through a first gate, and the inlet of the second gate shaft is provided with a duckbill valve; water in the second gate shaft is prevented from entering the first gate shaft; the upstream side of the third gate shaft is connected with the second gate shaft through a second gate, and the downstream side is connected with a first sea drainage pipeline through a third gate and used for draining rainwater when the sea surface height is normal. The bottom of the third gate shaft is connected with a second sea discharging pipeline below the third gate shaft through a fourth gate. An upper water storage tank and a lower water storage tank are arranged at the position, lower than the normal water level of the sea surface, of the shore of the land area, the two water storage tanks are detachably communicated, a bottom outlet of the second sea drainage pipeline is connected with the upper water storage tank, and when the sea surface is at the extremely high water level, the third gate shaft drains rainwater into the two water storage tanks through the second sea drainage pipeline.

The invention discloses a land area measuring device for land resource investigation, and particularly relates to the technical field of measuring devices.The land area measuring device comprises a device shell and a fixing cone, universal wheels are fixedly connected to the four corners of the lower end of the device shell, a handle is fixedly connected to the front end of the device shell, and a measuring rope is fixedly connected to the outer surface of the fixing cone; the inner surface and the rear end of the device shell are jointly provided with a retractable fixing assembly, and a cleaning assembly is arranged at the position, behind the retractable fixing assembly, of the inner surface of the device shell. According to the land area measuring device for land resource investigation, the hammering mechanism and the limiting mechanism enable the measuring rope to cling to the ground when the measuring rope measures the land area, and the measuring rope is temporarily fixed on the ground and clings to the ground in the rope releasing measurement process, so that the measuring rope is prevented from being damaged. The measuring rope is effectively prevented from shaking due to wind interference or human factors, the measuring stability of the measuring rope is improved, the measuring accuracy is further improved, and the deviation of a measuring result is reduced.

The invention relates to the technical field of ecological management, and particularly discloses an ecological restoration system and method for a water-level-fluctuating zone of a lake reservoir. The ecological restoration system is divided into a land area shoreline subsystem, a constant water level to high water level area subsystem, a constant water level to low water level area subsystem, a lake and reservoir water surface area wetland subsystem and a river inflow lake mouth pollution interception and precipitation subsystem, and multi-gradient and zonal ecological restoration from the constant water level to the high water level and the low water level is achieved. Through the multi-layer combined ecology of submerged plants, emergent aquatic plants, wet woody plants and indigenous trees, shrub and grass, a composite community system with a stable structure is formed, vegetation coverage of the hydro-fluctuation zone can be maintained throughout the year, repeated planting and restoration are not needed, a large amount of maintenance cost is saved, and the method is suitable for lake and reservoir hydro-fluctuation zones with different landforms and water level change characteristics in the whole country.

The invention discloses a method, device and equipment for correcting an ERA5 wind field, a medium and a program product, and relates to the technical field of meteorological data reconstruction, and the method comprises the steps: relocating a typhoon center position in an ERA5 original wind field based on historical typhoon trajectory data; dividing the typhoon activity area into an ocean area, a land area and a near-shore area according to the linear distance between the center position of the typhoon and the coastline; in the ocean area, the land area and the near-shore area, ERA5 original wind fields of the areas are reconstructed through different wind field reconstruction strategies, and new correction wind fields of the areas are obtained; and embedding the new corrected wind field of each region into the original ERA5 wind field to obtain a corrected ERA5 target wind field.

The invention discloses a sea-land integrated gold mine exploration method, and relates to the technical field of exploration, and the method mainly comprises the steps: calculating a hydraulic connection index, presetting a threshold value, and judging whether the land is in hydraulic connection with a river or not; calculating a water quality comprehensive parameter, further calculating a gold mine existence index, presetting a threshold value, and judging whether gold mine indication information exists in the river basin or not; calculating submarine topography complexity, and further calculating a geological suitability index; calculating a trend difference index, further obtaining a comprehensive association index, and presetting a threshold value to judge whether the land area is associated with the offshore sea seabed geologic structure or not; physical comprehensive parameters and chemical comprehensive parameters are calculated respectively, and a gold mine comprehensive evaluation index is further calculated; position evaluation parameters are calculated, and the priority of the exploration area is judged; according to the method, the priority of the exploration area can be scientifically and accurately judged, and the gold mine exploration efficiency and accuracy are improved.

The invention discloses a multi-stage ship lock drainage and navigation multiplexing system and an operation method thereof. The system comprises a first-stage ship lock chamber section located on the upstream, a last-stage ship lock chamber section located on the downstream and a plurality of middle-stage ship lock chamber sections located between the first-stage ship lock chamber section and the last-stage ship lock chamber section. Each stage of ship lock chamber section is composed of a lock chamber bottom plate and ship lock walls arranged on the two sides of the lock chamber bottom plate. A water conveying gallery is arranged in the lock wall of the ship lock, and the middle of the water conveying gallery communicates with a branch gallery arranged in a lock chamber bottom plate through a T-shaped pipe. A plurality of water outlet holes are formed in the tops of the branch galleries; an energy dissipation pier group formed by a plurality of energy dissipation piers is arranged at the water outlet hole in the lock chamber bottom plate; and a flip bucket is arranged at the downstream end of each stage of lock chamber section of the ship lock. According to the multi-stage ship lock collaborative continuous energy dissipation scheme, the effects of improving the space utilization rate, saving the land area and reducing the construction cost are achieved.

The invention provides a precise point positioning method, system, equipment and medium in an ocean scene, and belongs to the field of satellite navigation positioning, and the method comprises the steps: obtaining IGS-ZTD data and GGOS-ZTD data of different observation stations on the land, obtaining time sequence daily average deviation value data through calculation, inputting the data into a fitting model, carrying out the spherical harmonic expansion after fitting, and carrying out the precise point positioning. And obtaining a spherical harmonic function deviation model of the land area. Acquiring longitude and latitude of the ocean observation station, performing fitting calculation by using a spherical harmonic function deviation model, and introducing a dynamic order screening mechanism of a monthly scale to obtain a correction deviation value of the ocean observation station in the current month; and fitting ZTD data is obtained according to the correction deviation value. The regional limitation of a GNSS observation station is broken through, and the positioning precision of GGOS-ZTD data in an ocean region is improved by constructing a collaborative correction framework. And applying the fitted ZTD data to precise single-point positioning of an ocean scene to realize high-precision positioning of the measuring points in the ocean area.

The invention discloses a source-plant-network-river integration-based overflow pollution risk simulation evaluation method. The method comprises the steps of obtaining a source-plant-network-river integration hydrological, hydrodynamic and water quality model; simulating water quality of a plurality of river network sections, calculating the risk degree, and calculating the inflow load capacity corresponding to a plurality of source positions; collecting the population density, the water area ecological asset value and the water resource asset value close to the land area, and calculating the vulnerability corresponding to each section; calculating a river network section risk evaluation index; calculating a source position risk evaluation index; model-driven remote monitoring is adopted, the water quality of multiple river network sections is simulated, the flow-in load capacity conditions of multiple source positions corresponding to the river network sections are traced, the water environment conditions in the'source-plant-network-river 'basin can be known remotely in real time in a large range, the field monitoring construction and installation cost and the operation and maintenance cost are reduced, and the monitoring efficiency is improved. And dynamic monitoring of the whole watershed is realized.

1. Name of the designed product: land marker. 2. Use of the designed product: the designed product is used for demarcating land area. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The invention provides an offshore photovoltaic cluster submarine cable laying method, and relates to the field of offshore photovoltaic technologies. The laying method comprises the following steps: transporting a submarine cable reel to a preset position on the sea surface; pulling one end of the submarine cable in the submarine cable reel from a preset position to a land area, and connecting the submarine cable with a sea-land conversion docking box on the land area; the submarine cable in the submarine cable reel is put down according to a preset route until the submarine cable extends to the offshore photovoltaic platform from the land area; excavating a seabed mud layer along the extension direction of the submarine cable to form a submarine cable laying groove, placing the submarine cable in the submarine cable laying groove, and backfilling the submarine cable laying groove; and fixing the submarine cable extending to the offshore photovoltaic platform on the offshore photovoltaic platform. According to the submarine cable laying method, the submarine cable laying efficiency and stability can be improved.

To draw a world map of a correct land area on a plane.SOLUTION: When a world map is spread on a plane, a three-dimensional sphere is two-dimensionally represented, and distortion inevitably occurs in one or all of an area and a shape of a land, a bearing, and a distance. This method can correctly represent the land area thereof. The globe is divided into four semispheres, and an outer peripheral curve equal in length to a vertical 90-degree latitude line and a 90-degree longitude curve of an equal size horizontally dividing an equator are connected on an extension of 45 latitude, thereby representing roundness of the globe on a plan map. By equally dividing and connecting outer peripheral lines, widths become equal anywhere on the same latitude, and the widths are narrower as the longitude of the largest width on the equator becomes nearer to a pole, and become 0 at the pole. By placing coordinates of the land on a map writing only the latitude and the longitude, a world map of a correct area at any place is completed.SELECTED DRAWING: Figure 1

The invention provides a sea area influence measurement method and device for a coastal zone land area development level, and belongs to the technical field of information suitable for administrative purposes. The method comprises the following steps: generating a plurality of equidistant sampling lines perpendicular to a coastline along the coastline, wherein each sampling line extends a preset distance towards a land area and a sea area; acquiring an intersection point of each sampling line and the coastline as a sampling intersection point SIP; calculating an index average value of all pixels penetrated by each sampling line based on land social economic index data, and assigning the average value to the corresponding SIP to form a land development level point with vertical representativeness; carrying out nearest distance matching operation on a target pixel in the sea area and each SIP (Session Initiation Protocol); and according to the Euclidean distance between the target pixel and the SIP, performing attenuation processing on the land development level represented by the SIP by adopting a Gaussian attenuation function to obtain a sea area social economic influence score of the target pixel, thereby realizing fine description of transmitting the land development level to the sea area.

The invention relates to the technical field of artificial intelligence, in particular to a sequence remote sensing image coastal zone ground object classification method and system based on space-time fusion, and the method comprises the steps: obtaining a sample image which comprises a high-spatial-resolution image at a prior moment and a low-spatial-resolution image at a prediction moment; constructing a coastal zone ground feature classification model with time-space fusion, training the coastal zone ground feature classification model through the sample image until the composite loss of the coastal zone ground feature classification model is lower than a set loss threshold, and obtaining a trained coastal zone ground feature classification model; obtaining a remote sensing image to be classified, and classifying coastal zone ground objects in low-spatial-resolution images at a prediction moment in the remote sensing image through the trained coastal zone ground object classification model; the method can improve the classification precision of coastal zone ground features.

The invention discloses a'sky, sea and land 'global quality and safety management method and system, the scheme is formed by matching a sky region quality and safety management unit, an airspace quality and safety management unit, a sea region quality and safety management unit and a land region quality inspection management unit, and the sky region quality and safety management unit supervises ship navigation and operation safety states based on an antenna adjustment system; the airspace quality and safety management unit performs automatic inspection on the construction site based on the unmanned aerial vehicle and automatically identifies the construction progress based on the operation state of the inspection site; the sea area quality safety management unit performs remote sensing and real-time early warning on a sea area environment through a multi-point sensor deployed in a sea area; and the land area quality inspection management unit scans the assembly of the installation platform, and rechecks the assembly positioning size precision of the installation platform through a point cloud model. According to the scheme, on the basis of organic combination of multi-area safety monitoring, all-around and three-dimensional safety quality monitoring of the offshore photovoltaic project can be achieved, and the safety management level and the quality control efficiency are improved.

The application belongs to the technical field of sea wave spectrum construction, and discloses a sea wave spectrum intelligent rapid construction method based on parameter spectrum constraint and computer equipment, which comprises a data set construction step, weather and wave element and sea wave spectrum data of a target sea area are collected, and a mask M is created to identify sea and land areas during preprocessing; a model construction and training step, a hybrid model comprising a Jonswap spectrum constraint module, a spectrum energy compensation module and a fusion module is constructed, the model is trained using the data set, and the mask M is used during training to make the loss function only based on marine area data calculation; a spectrum construction step, inputting to-be-predicted data into the trained model, and outputting sea wave spectrum. The application dynamically outputs a spectrum peak factor through deep learning, overcomes the limitation of insufficient accuracy of a traditional fixed parameter Jonswap spectrum under different sea conditions, maintains the efficiency of the deep learning method, and can significantly improve the physical rationality, interpretability and prediction accuracy of sea wave spectrum prediction.

The present invention relates to a method for simulating shallow water dynamic processes based on local time steps. The method comprises: dividing a target area into multiple grids based on a shallow water dynamic process model, the target area including an ocean area and a land area adjacent to the ocean area; dividing the multiple grids into at least a first grid set and a second grid set; determining a first time step corresponding to the first grid set based on the first grid set; determining a second time step corresponding to the second grid set based on the second grid set; and determining a first simulation result of the shallow water dynamic process based on the first time step and the second time step; wherein the first grid set includes multiple first grids and the second grid set includes multiple second grids; and the first time step is greater than the second time step. By determining appropriate local time steps based on the accuracy requirements of different grid sets, the efficiency of the shallow water dynamic process simulation method is improved.

The invention discloses an ecological environment monitoring and early warning method and system based on big data, and relates to the field of environment monitoring and early warning, and the method comprises the steps: collecting sea-land ecological monitoring data, and obtaining historical sea-land ecological data; completing index pair matching of all monitoring indexes, and dividing the target sea-land area into an intertidal zone area and a non-intertidal zone area based on an index pair matching result and sea-land ecological monitoring data; constructing an intertidal topological graph, and completing sub-region division of the intertidal zone region based on the intertidal topological graph to obtain a plurality of intertidal sub-regions; calculating ecological area parameters; and combining the sea-land ecological monitoring data and the ecological area parameters to generate an ecological environment early warning report of the target sea-land area. According to the invention, the precision of environment monitoring and early warning in the sea-land boundary area can be effectively improved.

This utility model discloses a tidal tank, including a main tank, an overflow connecting pipe, a bottom filtration system, and a water circulation system. The main tank is equipped with a partition plate dividing it into a water zone and at least one land zone. The land zone includes a tidal pool and an elevated filtration isolation layer. Above the elevated filtration isolation layer forms a land area isolated from the tidal pool, and below the elevated filtration isolation layer forms a water circulation zone. The inlet end of the overflow connecting pipe extends into the water zone and is below the water level, while the outlet end extends into the land zone and is above the tidal pool. The overflow connecting pipe is equipped with a control valve to control its opening and closing. The bottom filtration system is located below the main tank, and the water circulation system connects the bottom filtration system and the main tank. The water level in the aforementioned tidal tank does not fluctuate drastically with the tides, and the bottom filtration system requires less storage space, thus reducing its space occupancy.

The invention relates to a remote sensing image quality evaluation method for an island shallow water area. The method comprises the following steps: separating an island underwater area from a land area by adopting a normalized water body index; extracting the shallow water area of the island reef by adopting relative water transparency and suspended solid total turbidity; constructing a cloud index, a cloud shadow index and a flare index to evaluate the cloud, shadow and flare conditions of the island shallow water region, and finally obtaining a plurality of special indexes; and 4, evaluating the image quality of the shallow water region of the island reef by using a special index and a general index (standard deviation, information entropy and definition). A remote sensing physical model and a traditional image quality evaluation method are organically combined, and the problem that an existing method is insufficient in applicability in an island shallow water area is effectively solved. By establishing a targeted quality evaluation system, accurate evaluation of an effective shallow water area in a satellite image is realized, and an automatic and efficient image quality evaluation solution is provided for island remote sensing monitoring.

The invention relates to the technical field of waterway measurement and terrain monitoring, and discloses a waterway earthwork dynamic monitoring system based on multi-source data of an unmanned aerial vehicle. The system is deployed on an unmanned aerial vehicle, land area data and a reference model are compared in real time through an on-orbit calculation unit, remarkable changes of areas such as a shoreline are recognized, and a water area detection interestingness map is generated in combination with a hydrodynamic model. Based on the map, the system adaptively plans an optimal detection path, flies along the path, and measures the water depth in a non-contact manner by using an acousto-optic technology. And finally, the system fuses real-time measurement results of the land area and the water area, performs differential analysis with the reference model, accurately calculates earthwork change indexes such as the total filling amount and the total excavation amount, and automatically generates a visual comprehensive report. Water area detection is intelligently guided through land area changes, efficient focusing and path optimization of monitoring tasks are achieved, and a rapid, accurate and safe monitoring means is provided for dynamic changes of channels.

The invention belongs to the technical field of sea wave spectrum construction, and discloses a parameter spectrum constraint-based sea wave spectrum intelligent rapid construction method and computer equipment, and the method comprises the steps: a data set construction step: collecting meteorological and wave elements of a target sea area and sea wave spectrum data, and creating a mask M during preprocessing to identify a sea-land area; a model construction and training step: constructing a hybrid model comprising a Jonswap spectrum constraint module, a spectrum energy compensation module and a fusion module, training the model by using a data set, and using a mask M to enable a loss function to be calculated only based on ocean region data during training; and a spectrum construction step: inputting to-be-predicted data into the trained model, and outputting a sea wave spectrum. According to the method, the spectrum peak factor is dynamically output through deep learning, the limitation that a traditional fixed parameter Jonswap spectrum is insufficient in accuracy under different sea conditions is overcome, and the physical rationality, interpretability and forecasting precision of sea wave spectrum forecasting can be remarkably improved while the high efficiency of the deep learning method is kept.