1484 results about "Oceanography" patented technology

The invention discloses a gravity type submerging net cage parameter design optimization method, and relates to the field of mariculture equipment structure optimization, and the method comprises the steps: collecting the multi-period marine environment data of a target sea area, and constructing an environment load sequence with a time-varying characteristic; establishing a three-dimensional coupling finite element model, performing disturbance analysis on a plurality of structure control parameters, and identifying a key design parameter set based on a response sensitivity function; and constructing a multi-objective optimization model including floating and sinking time control, maximum stress minimization and attitude offset constraint, performing global optimization by adopting an adaptive genetic algorithm, obtaining an optimal parameter solution, substituting the optimal parameter solution into the simulation model for dynamic response verification, and if a response index is converged to a target interval, outputting the optimal parameter solution as final design configuration. According to the method, systematic optimization of structural parameters of the submerging and surfacing net cage can be achieved, the stability and safety of the submerging and surfacing net cage under complex sea conditions are improved, and the method has high engineering applicability.

A system is for cooling at least one computing device using water. The system has a body of water defining a first waterline and a structure at least partially submerged in the body of water. An internal volume of water defines a second waterline. At least one outlet drains water from the internal volume of water to the body of water. A container is at least partially submerged in the internal volume of water and has at least one computing device that generates heat in use. An inlet pipe has a pump to move water from the body of water to the internal volume of water. A flow path of water is provided across the container towards the at least one outlet. The second waterline is at a height above the first waterline to drive the flow path to provide cooling of the container and computing device therein.

The invention discloses a multi-scale sea surface electromagnetic scattering calculation method and device based on marine environment elements and a storage medium, and belongs to the technical field of marine detection and physical remote sensing. The method comprises the following steps: calculating a tension wave sea spectrum according to an Elfouhail sea spectrum in combination with a Longuet-Higgins directional spectrum; a JONSWAP sea spectrum is combined with a Longuet-Higgins directional spectrum to calculate a gravity wave sea spectrum; superposing the tension wave on the gravity wave according to the slope by using a linear superposition method, and calculating a self-adaptive cut-off wave number; the contribution of small-scale waves to scattering is calculated by adopting an integral equation method, mirror scattering of large-scale waves is counted by adopting a Kirchhoff approximation method, and statistics and fusion are carried out on each scale wave according to the self-adaptive cut-off wave number, so that an electromagnetic scattering value is obtained. According to the method, a sea surface geometric calculation method based on real marine environment element driving is adopted, and accurate calculation is performed aiming at sea surface scattering characteristics under different sea conditions in combination with an integral equation method-Kirchhoff approximation electromagnetic scattering calculation model of an adaptive cut-off wave number, so that the calculation precision of scattering intensity is improved.

The invention discloses an integrated fan pneumatic-hydrodynamic-servo-elastic-plastic coupling analysis system and method, and belongs to the technical field of offshore fan numerical simulation calculation. According to the method, a coupling model of an offshore wind turbine under the environment load effect is established, a rotor cabin assembly is simulated through a multi-body dynamics method, and interaction of a supporting structure and pile soil is simulated through a finite element method. By introducing a prediction correction loose coupling algorithm, joint simulation between a multi-body system and a finite element system is realized. The method is not only suitable for coupling dynamic response analysis of the offshore wind turbine under the action of conventional wind wave load, but also suitable for elastic-plastic coupling analysis of the offshore wind turbine under the action of extreme typhoon load or earthquake load. In addition, the method not only can be used for coupling analysis of the offshore wind turbine of a traditional steel supporting structure, but also is suitable for integrated coupling analysis of the wind turbine of a novel steel-concrete structure on land or on the sea.

The invention discloses an offshore wind power frequency conversion gathering and sending control method, device and system based on onshore integration, and belongs to the technical field of power transmission and distribution of power systems, and the method comprises the steps: converting first AC electric energy generated by an intermediate-frequency / power-frequency wind power plant into first DC electric energy through an offshore converter station; the first direct-current electric energy is transmitted to a land integration station through a direct-current submarine cable; second alternating-current electric energy generated by the low-frequency wind power plant is transmitted to the land integration station through a low-frequency alternating-current submarine cable; and converting the second alternating-current electric energy into second direct-current electric energy in the land integrated station, carrying out collection and power frequency conversion on the first direct-current electric energy and the second direct-current electric energy, and transmitting power frequency alternating-current electric energy obtained after conversion to a land power grid. Therefore, by implementing the application, the problem that the electric energy cannot be transmitted at low cost due to the fact that it is difficult to directly send the electric energy of different frequencies out of the system for topological combination in the prior art can be solved.

The invention provides a multi-parameter-based offshore piling underwater sound source level prediction method and device.According to the method, multiple sets of historical monitoring data are obtained, each set of historical monitoring data comprises multi-parameter information and a corresponding single impact sound exposure level, and the multi-parameter information comprises impact energy, hammer weight, pile diameter and water depth; establishing a prediction relation model according to the multiple groups of historical monitoring data; and acquiring multi-parameter information corresponding to the single impact sound exposure level of the to-be-predicted project, and substituting the multi-parameter information into the prediction relation model to obtain the single impact sound exposure level of the to-be-predicted project, so that the impact energy, hammer weight, pile diameter and water depth of the to-be-predicted project, which are easy to acquire, are input, and the single impact sound exposure level of the to-be-predicted project is obtained. And the calculation is simple and convenient, so that the sound source level of the underwater noise generated by piling can be quickly predicted in the early stage of a project.

The invention discloses a geometric constraint fitting point cloud filtering method for sea surface three-dimensional reconstruction, and belongs to the technical field of computer vision and three-dimensional reconstruction. The objective of the invention is to solve the problem of insufficient subsequent three-dimensional reconstruction precision caused by interference of reflection noise, mismatching points and the like in sea surface point cloud. The method specifically comprises the following seven steps: firstly, acquiring sea surface original point cloud through three-dimensional data acquisition equipment; a filtering technology is adopted to obtain a to-be-fitted point cloud; fitting a quadric surface through an improved RANSAC (Random Sample Consensus) algorithm to solve an initial parameter; constructing a comprehensive error function, and optimizing the model through gradient descent; effective inner points are screened through quadratic term coefficient constraint and a distance threshold value; and finally, iterating until a termination condition is met, and outputting an optimal effective point cloud. The method is high in noise rejection rate, the point cloud fits the sea surface form, and high-quality data support can be provided for sea surface fitting, sea wave simulation and unmanned ship control.

The invention discloses a visual drawing method and device for an inland ship navigation trajectory and a medium, and the method comprises the steps: collecting GPS positioning data, AIS dynamic parameters and static attribute data of a ship through a ship terminal, carrying out the preprocessing of the GPS positioning data and the AIS dynamic parameters, and storing the processed data in a database according to a timestamp index; calling a geocoding service interface, mapping the processed longitude and latitude coordinates of the ship to an electronic navigation channel chart coordinate system, and periodically updating a ship position mark in an electronic map interface; in response to a time period query instruction input by a user, extracting ship track point data corresponding to the timestamp sequence from the database, and superposing the ship track point data to the electronic channel chart to generate a dynamic track line; a user operation instruction is received through the time axis control, the ship mark position and the course display state on the trajectory line are dynamically adjusted, and visualized backtracking of the historical trajectory of the ship is achieved.

The invention belongs to the technical field of marine environment monitoring and numerical simulation, and relates to a three-dimensional marine element field reconstruction method based on multivariable empirical orthogonal function decomposition. Comprising the steps of S1, multi-source data collaborative preprocessing; S2, MEOF joint modal extraction; S3, vertical projection operator optimization construction; S4, three-dimensional element field dynamic reconstruction; according to the method, through organic combination of multivariable modal decomposition and physical constraint projection, limitation of precision, efficiency and adaptability in three-dimensional field reconstruction in the prior art is broken through, key technical support is provided for real-time monitoring of the ocean dynamic environment, and the method can be widely applied to the fields of ocean disaster early warning, underwater engineering safety guarantee and the like.

A method for a collision avoidance system of a host marine vessel, and to updating vessel classifications and navigational statuses of marine vessels.

The invention relates to the technical field of underwater topographic surveying and mapping, in particular to a sea area water taking channel scanning survey method and system based on multi-beam measurement, and the method comprises the following steps: constructing a rigid support, fixing a depth finder through a three-way cable fastening device, and building a Boolean parameter model; sound velocity, tide level and original echo data are collected; performing space-time registration, coordinate conversion and filtering denoising on the data to generate corrected water depth; and constructing an irregular triangulation network by using hard boundary constraint, generating a digital elevation model, and extracting a siltation area. According to the invention, multi-beam wide sector scanning and multi-sensor attitude correction technologies are fused, a limited water area full-coverage measurement system is constructed, and the problems of terrain blind areas and detail loss are solved. A boundary constraint reconstruction algorithm is utilized to realize closed-loop processing from coordinate reference unification to micro-landform restoration, the accuracy of channel bottom pit capture and edge topography expression is improved, and data support is provided for sedimentation analysis.

The invention discloses a grid-adaptive sub-mesoscale hybrid parameterization method and system, and the method comprises the steps: calculating an effective resolution and a frontal scale according to the spatial resolution of an ocean model, carrying out the calibration of a horizontal buoyancy gradient, and calculating an air-sea interface buoyancy flux and a horizontal Akkerman buoyancy flux according to the calibrated horizontal buoyancy gradient; and calculating to obtain expressions of the convective mixing effect and the sub-mesoscale mixing effect, and a vortex viscosity coefficient and a vortex diffusion coefficient of the sub-mesoscale mixing effect. According to the method, the problem that an existing parameterization scheme cannot be applied to a coarse-resolution ocean model at present is solved, and the effect of introducing sub-mesoscale mixing into ocean models with different resolutions is achieved.

A method employs a simulation-driven environment for Al model training in filmmaking, using virtual scenes, filmmaking metadata, and Lidar data to enhance video generation capabilities. A system includes processors and memory to generate virtual scenes, integrate Lidar data with filmmaking metadata, and train Al models for improved video content creation. A computer-readable medium contains instructions for generating virtual scenes, integrating Lidar data and filmmaking metadata, and training Al models to enhance video content generation without constant new real-world data.

The invention discloses an electromagnetic field simulation method under the coupling action of tidal waves and sea waves. The method comprises the steps that input parameters of the tidal waves and the sea waves are set; configuring environmental parameters and geomagnetic conditions; superposing the tidal wave velocity field and the sea wave disturbance velocity field to form a total velocity field; the tidal wave part and the sea wave part are linearly coupled in time and space to obtain a tidal wave-sea wave coupling field evolved along with a tidal phase; in the tidal wave-sea wave coupling field, electromagnetic response calculation is executed on each frequency-direction sampling point; general field synthesis and modulation effect analysis: introducing a tidal wave modulation factor to clearly reflect amplitude periodic change and spectrum reconstruction characteristics of an electromagnetic field signal along with a tidal phase; and outputting a time sequence, an amplitude spectrum and a spatial distribution result of the comprehensive electromagnetic field. According to the method, the authenticity and applicability of sea wave induction electromagnetic field simulation can be improved, and a new technical means is provided for electromagnetic noise recognition, sea wave parameter inversion and complex ocean dynamics process research.

The invention provides a fishery breeding risk area division method and related equipment, and relates to the technical field of breeding area planning. The method comprises the steps of simulating a disturbance effect of a fan group on a water flow field based on a geometric model of the fan group in combination with marine environment data of a target sea area where the fan group is located, and obtaining a water flow field simulation result; determining a risk area in the target water area based on the water flow field simulation result; inputting the flow velocity data of the risk area at each moment in the first time period into a pre-established water flow prediction model to obtain flow velocity data of the risk area at each moment in a second time period; and respectively mapping the flow velocity data of the risk area at each moment in the second time period into risk levels, and dynamically dividing the risk area in the target water area based on the risk levels. According to the method, the water flow field near the fan group can be simulated, and the preliminary risk area is determined. And through the water flow prediction model, predicting the water flow change trend at each moment in the future, and dynamically adjusting the risk area.

The invention provides an electromagnetic detection system based on a sea-bottom crawler, belonging to the field of geophysical exploration technology, comprising: a survey vessel, a sea-bottom crawler, a transmitting antenna, a receiving node array, a control chip, and a power supply; the survey vessel is connected to the sea-bottom crawler through a traction rope, and the tail of the sea-bottom crawler is provided with a drag cable, on which the transmitting antenna and the receiving node array are mounted, and both the control chip and the power supply are configured in the integrated electronic cabin of the sea-bottom crawler; the power supply provides electrical energy to the sea-bottom crawler, transmitting antenna, receiving node array, and control chip, and the control chip is electrically connected to the transmitting antenna, the receiving node array, and the power system of the sea-bottom crawler; the control chip is configured to have an electromagnetic detection interference compensation module for performing interference elimination and compensation on reflected waves received by the receiving node array. It solves the technical problem of insufficient detection accuracy in existing technologies.

The invention relates to a landslide susceptibility evaluation method and device, electronic equipment and a medium, and belongs to the technical field of geological disaster prediction and prevention, and the method comprises the steps: obtaining preprocessed digital elevation model data and multi-source data of a target area; dividing the preprocessed digital elevation model data based on preset geographic software to obtain evaluation unit data, the evaluation unit data including slope unit data and grid unit data; training a preset deep integration model based on the evaluation unit data, and determining the evaluation unit data with high training precision as target evaluation unit data; determining a landslide influence factor based on the target evaluation unit data and the multi-source data; inputting the landslide influence factor into a preset depth integration model to obtain a preliminary evaluation result of the landslide susceptibility of the target area; and obtaining a landslide susceptibility evaluation result of the target area based on the preliminary evaluation result. According to the invention, landslide disaster risk zoning and prevention and control schemes can be accurately recommended.

The invention provides an underwater-water surface unmanned system cooperative control method based on NMPC, belongs to the technical field of robot control, and particularly provides an underwater terrain prediction method based on sonar information feedback by using multi-beam sonar data, and obtains underwater terrain coordinate data by fusing a robot state predicted by a non-linear model in NMPC. And according to the predicted underwater terrain information, an underwater terrain following control problem is converted into an optimization problem with constraints by using NMPC, and terrain following control of the underwater robot can be realized by solving the optimization problem. On the basis, a task-triggered underwater-water surface unmanned system cooperative control strategy is constructed, and the tracking of the underwater robot by the water surface unmanned ship is realized. And finally, the cooperative control problem of the underwater-water surface unmanned system for unknown sea area exploration is successfully solved.

The utility model discloses a high-flow-speed flowing water culture tank device. Water circularly flows in a high-level water tank, a high-flow-speed flowing water culture tank and a low-level water tank through a circulating lifting pump and a circulating pipeline; the high-flow-speed flowing water breeding tank is in a winding shape, the bottom slope has different gradients, and the bottom of the high-flow-speed flowing water breeding tank is connected with the bottom of the low-position pool through a slope ramp. According to the utility model, diversified habitats with still water, different flow speeds and the like are provided for fishes.

The invention relates to the technical field of river ice disaster prevention, and discloses a river freeze-up state prediction method under a multi-flow condition, which comprises the following steps: calculating the flat beach flow at the early stage of river freeze-up; calculating the river sealing volume at the early stage of riverway freezing; obtaining the cooling intensity of the river channel in the cooling process; after correlation analysis is carried out on the accumulated negative air temperature in the time period from the flow to the river closure, the flat beach flow, the river closure flow and the cooling intensity, an accumulated negative air temperature prediction model in the time period from the flow to the river closure is established, a nonlinear least square method is adopted for solving, an optimal fitting coefficient is obtained, and an optimal accumulated negative air temperature prediction model is generated; the accumulated negative air temperature of the current year is obtained, the accumulated negative air temperature is predicted, and the riverway freezing-up state of the current year is obtained through comparison; according to the method, the accumulated negative temperature of the frozen river channel can be accurately obtained by establishing the nonlinear relation between the factors such as the river channel condition (flat beach flow), the sealed river flow and the cooling intensity and the accumulated negative temperature, so that the frozen state of the river reach is accurately judged.

The invention discloses a partition plate type fishway built on a floodplain, and relates to the technical field of fishways, the partition plate type fishway comprises a fishway and a movable cover plate, the fishway is a partition plate vertical seam type fishway, the movable cover plate is arranged at an opening in the upper end of the fishway, and the movable cover plate is detachably connected with the fishway. According to the partition plate type fishway built on the floodplain, fish migration can be achieved for a floodplain type river channel, and silt can be prevented from blocking the fishway when river water overflows the floodplain.

The invention belongs to the technical field of water conservancy and hydropower engineering, and particularly relates to a grotto side wall mechanical parameter displacement back analysis method based on a fungus growth optimization algorithm, which comprises the following steps of: 1, establishing an underground powerhouse FLAC3D numerical model by adopting an elastic-plastic constitutive model conforming to a Hook-Brown failure criterion; 2, converting a parameter back analysis problem into an optimization problem, and determining optimization variables of the mechanical parameters of the side wall of the numerical model; step 3, establishing a displacement error minimum optimization objective function; and 4, solving the target function by adopting an FGO optimization algorithm, and searching global optimal side wall mechanical parameters. According to the method, the rock mass engineering design problem that on-site large-size rock mass mechanical parameter values cannot be accurately obtained based on small-size rock samples due to the remarkable rock mass scale effect is effectively solved.

The invention discloses a cold region water and sediment function connectivity quantification method. The method comprises the following steps of S1, obtaining basic raster data of a research region and performing preprocessing; s2, determining sources and catchment conditions of rivers in the drainage basin, and performing catchment and sediment transport unit identification on a GEE platform; s3, a D-Infinity (DINF) algorithm is applied to determine the flow direction of watershed water flow, an upslope drainage threshold value is defined, and the contribution area of the unit is obtained based on iterative calculation of the flow direction of watershed water flow and the upslope drainage threshold value; s4, writing the weighting factor of each unit and calculating the component factor of each unit; s5, calculating an uphill component and a downhill component of each catchment and sediment transport unit, and sequentially performing iteration and quantitative calculation in combination with the S3 to obtain high-resolution cold region water and sediment function connectivity raster data of the whole drainage basin; the method breaks through the current situation that the method is not suitable for large-area cold region drainage basin calculation, can analyze the response of thermal erosion to the scale of the cold region drainage basin, can also clarify the complex cold region water and sediment cascade process, and is of great significance to cold region ecological protection and landscape evolution research.

The utility model provides an upper end cover of a liquid oxygen fracturing pipe suitable for underwater rock mass, and relates to the technical field of expansion fracturing, the upper end cover comprises an end cover body, the upper surface of the end cover body is provided with counter-force petals, the counter-force petals are annularly arranged on the upper surface of the end cover body, and the counter-force petals are arranged on the lower surface of the end cover body. The counter-force petals are arranged on the upper end cover, an acute included angle alpha is formed between the counter-force petals and the axial direction of the end cover body, the counter-force petals are made of semi-rigid materials, the end cover body is used for being detachably connected with a fracturing pipe, and the counter-force petals are arranged on the upper end cover, so that the counter-force petals can be clamped to the inner wall of a blast hole, the buoyancy effect of water on the fracturing pipe is counteracted, and the fracturing effect is improved. And therefore, an operator can mount the fracturing pipe at the bottom of the blast hole.

This invention provides an automatic feeder for sea cucumber seedlings, comprising an integrated feed mixing and dispensing device. The integrated feed mixing and dispensing device includes a mixing tank, a mixing tank cover, an electric cylinder, and a feed mixing and dispensing mechanism. The mixing tank is a cylindrical structure with its axis perpendicular to the horizontal plane and closed at the top and open at the bottom. A feed inlet is located at the top of the mixing tank. The mixing tank cover is located directly below the mixing tank and is detachably fitted onto the opening at the bottom of the mixing tank. One end of the electric cylinder is mounted on the mixing tank body, and the other end is mounted on the mixing tank cover. The feed mixing and dispensing mechanism includes a pulsator motor and a pulsator. The pulsator motor is mounted on the mixing tank cover, and its output shaft extends upward along the axis of the mixing tank body. The pulsator is coaxially mounted on the output shaft of the pulsator motor and located directly above the mixing tank cover. Compared to existing technologies, this invention is smaller, lighter, and more flexible.

The invention relates to the technical field of image processing, and discloses a fish school density determination method and device based on multi-range adaptive partition, computer equipment and a storage medium. According to the invention, the multi-modal perception model is used to replace the traditional mode of reading and marking the range of the sonar image depending on manual visual reading, and the polar coordinate-Cartesian coordinate mapping model is constructed based on the analyzed range parameters, so that the self-adaptive geometric partitioning and geometric distortion correction of the original sonar image are realized. A sonar image is decomposed into a plurality of microcosmic local block masks by generating local block masks, local effective fish school and local water volume are independently calculated in the local block masks, and finally the overall fish school density is determined. The method can be applied to the field of cultivation insurance insurance claim settlement business, and the capability of eliminating image distortion when an image system identifies and scans an image is improved.

The invention relates to an experimental device for simulating dry-wet alternation and sea wave erosion corrosion and a using method, the experimental device comprises a box body, a wave making plate, a sample clamp and a central control system, the wave making plate is arranged in the box body, and the wave making plate is driven by a driving assembly to reciprocate; the sample clamp is used for clamping a metal sample, and the height of the sample clamp in the box body is adjusted through a lifting assembly. The central control system comprises a driver, an industrial control board, a computer and a wave meter, the driver, the computer and the wave meter are all connected with the industrial control board, and the wave meter is arranged in the ocean and the box body and used for collecting ocean wave parameters in the ocean and wave parameters generated by the wave generation board in real time and sending the collected parameters to the industrial control board; and the driver is used for controlling the driving assembly to act. The problem that an experimental device cannot accurately simulate the complex corrosion working condition of a steel structure in a marine environment can be solved.

The invention discloses a marine economic fish capturable quantity evaluation method and system based on an acoustic technology. The method comprises the following steps: dividing an offshore target area into a plurality of monitoring areas; sound wave data are collected through an acoustic detection device, and initial fish school density and range are obtained through LMS filtering processing in combination with fish sound wave characteristics; screening a core area and generating a detection route; initial data are corrected through underwater image detection; analyzing fish school migration distribution based on path probability and an improved A-star algorithm; and checking the capturable quantity in combination with a resource limitation standard. The system is provided with a plurality of data dynamic processing flows corresponding to the method, the problems that an existing method is low in monitoring precision, inaccurate in migration analysis and unscientific in capturing amount checking are solved, the accuracy and scientificity of capturing amount evaluation are improved through differentiated region division, dynamic data correction and intelligent migration analysis, and the capturing amount evaluation efficiency is improved. And a technical support is provided for sustainable development of fishery.

The invention relates to the field of hydropower stations, in particular to a hydropower station reservoir area fishway outlet structure and a fishway fish passing method, the hydropower station reservoir area fishway outlet structure adapts to the scene with the large reservoir area water level change amplitude and is more compact in structure, the hydropower station reservoir area fishway outlet structure comprises a fishway section, a fish lifting machine and a gate, and the position of the upstream of the fishway section is higher than the position of the downstream of the fishway section; the gate and the fish lifting machine are arranged on the upstream of the fishway section and comprise a flat slope section, the flat slope section is arranged between the fishway section and the fish lifting machine, the bottom face of the flat slope section is horizontally arranged, an inlet of the flat slope section is communicated with the fishway section, and a water inlet gate is arranged at an outlet of the flat slope section. The system is particularly suitable for hydropower stations with large reservoir area water level variation amplitude and limited fishway arrangement space.

The invention discloses a cutter suction dredger control method and device, a dredger, a medium and a program product, and relates to the technical field of cutter suction dredger control. Under the condition that the concentration difference between the current mud concentration and the preset mud concentration is larger than a preset threshold value, the preset mud concentration serves as an optimization target, a mud concentration fitting model of the cutter suction dredger is solved based on a preset optimization algorithm, and construction parameters of the cutter suction dredger are obtained; wherein the mud concentration fitting model is used for representing a parameter relationship between the construction parameters and the mud concentration; and based on the construction parameters, the cutter suction dredger is controlled to work. The construction parameters can be regulated and controlled in real time according to the current mud concentration of the cutter suction dredger, and the operation stability and the operation efficiency of the cutter suction dredger are guaranteed.