2459 results about "Oceanography" patented technology

The system and method relate to detection of objects that are submerged, or partially submerged (e. g. floating), relative to a water surface. One aspect of the invention emits LIDAR fan-beam pulses and analyzes return-pulse portions to determine water-surface orientations and derive submerged-object images corrected for refractive distortion. Another defines simulated images of submerged objects as seen through waves in a water surface, prepares an algorithm for applying a three-dimensional image of the water surface in refractive correction of LIDAR imaging through waves—and also models application of the algorithm to the images, and finally specifies the LIDAR-system optics. Yet another emits nearly horizontal pulses to illuminate small exposed objects at tens of kilometers, detects reflected portions and images successive such portions with a streak-tube subsystem. Still others make special provisions for airborne objects.

A beach chair towel retaining system is disclosed comprising a beach towel for covering a beach chair. An upper stretchable band resiliently surrounds both the upper portion of the towel and the upper portion of the beach chair and retains the upper portion of the towel on the surface of the upper portion of the beach chair. A lower stretchable band resiliently surrounds both the lower portion of the towel and the lower portion of the beach chair and retains the lower portion of the towel on the surface of the lower portion of the beach chair. Each of the upper and lower stretchable bands comprises a bunchable towel material encasing an elastic material. A saddle bag comprising a strip with a pocket, for item storage, at each end rests on top of the intermediate portion of the towel, with one of the pockets hanging on one side of the intermediate portion of the beach chair and the other of the pockets hanging on the other side to retain the intermediate portion of the towel on the intermediate portion of the beach chair. A pillow and a pocket are detachably attached to the outer surface of the upper stretchable band.

A method of controlling moderate-sea strip shape of controlling strip steel. The head of strip steel is controlled by moderate-sea PCSU control, that is, PC setting control. The rear of strip steel is controlled by dynamically automatic strip shape moderate-sea control, which is dynamic ASC control. Determining the objective control degree of moderate-sea flatness of strip steel, calculating convexity of finish rolling strip steel, equivalent heat convexity of roller, coefficient of extension and flatness of strip steel. According to kinds, scales of steel, determining factors, constant terms, proportion factors in formulas, making moderate-sea control on flatness of exported finish rolling strip steel. Two-side sea in cooling could be effectively eliminated, which improves the quality ofstrip steel.

Apparatus and methods are described for remotely controlling position of marine seismic equipment. One apparatus comprises a source connected to a tow member; and an adjustment mechanism connected to the source and the tow member, the adjustment mechanism adapted to actively manipulate an angle of attack of the source. It is emphasized that this abstract is provided to comply with the rules requiring an abstract, which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

The invention discloses a method for monitoring mountain landslide and debris flow in mountainous areas based on an unmanned aerial vehicle. The method is characterized in that photographing is carried out through directional cruising of the unmanned aerial vehicle and an imaging device and a positioning device which are carried by the unmanned aerial vehicle, and collected data is analyzed through computer software so as to work out an accurate rescue mode and a path method in allusion to mountain landslide and debris flow in the mountainous areas. The method disclosed by the invention can accurately judge the damage area of a region in which mountain landslide or debris flow occurs through applying unmanned aerial vehicle remote sensing technologies to the field of mountainous area sudden accident rescue, and seamless searching is carried out by means of the unmanned aerial vehicle through computer modeling and planning, thereby monitoring damage conditions of the affected region quickly and comprehensively, transmitting information to a rescue command center timely, being convenient for rescue workers to plan an accurate rescue path timely, and greatly improving the rescue efficiency; and the method is applicable to detection work for affected mountainous areas under various complex conditions.

The invention relates to an ocean spilt oil film thickness hyperspectral remote sensing estimation method based on a parameter lookup table and belongs to the field of ocean environment monitoring research. The method includes the steps of obtaining and pre-processing standard oil film thickness continuous change hyperspectral data by designing a simulation experiment; obtaining and pre-processing ocean spilt oil satellite remote sensing data; resampling a standard oil film spectrum based on a satellite sensor performance index; normalizing spectral reflectivity; building an oil film thickness optical calculating model; building an attenuation parameter lookup table; normalizing the reflectivity of satellite data and conducting mask treatment; inquiring and building an optimal wave band of the satellite data and relevant parameters; and calculating the oil film thickness in the satellite data through the parameter lookup table and the optical model. Compared with a traditional observation means, by means of the ocean spilt oil film thickness hyperspectral remote sensing estimation method, field workload is less, the thickness of the spilt oil film can be quantized, the thickness of an oil film in a spilt oil area can be calculated without entering an ocean spilt oil pollution area, and requirements of ocean split oil emergency monitoring and evaluation can be met.

Energy generating system using sea waves characterised in that said floating body (1) is mounted on a structure (5), in that it includes at last one horizontal shaft (9) integral by its ends to said structure (5), and in that said means for converting the movement of said floating body (1) into mechanical energy include a moving housing (10) around which the connecting cable or chain (4) winds, with said housing (10) being mounted in rotating fashion in relation to said horizontal shaft (9), in such a way that it rotates under the action of said wound cable or chain (4). The system obtains energy in a very simple and effective way.

The present invention relates to a nuclear power plant and safety system with fuse element and gravity elevator, the buildings of the power plant subjected to contamination being buried below sea level and under borated water basins, and having a safety system free of electrical and electronic components to act in the event of possible accidents comprising, among others, means for flooding the buildings of the power plant with thermal fuses and gravity elevators for operator evacuation in the event of an emergency.

The invention relates to a water surface cleaning boat and a front cabin collecting device of the water surface cleaning boat. The front cabin collecting device comprises a front cabin frame, a conveyor belt, harvesting scissors, a collecting jaw and collecting arms. The conveyor belt is arranged on the front cabin frame and used for conveying collected objects, the harvesting scissors are located at the front end of the conveyor belt, the collecting jaw is located above the harvesting scissors and can vertically rise and fall, and the collecting arms are located on the two sides of the front cabin frame. Especially, the collecting arms on the two sides are rotationally arranged on the front cabin frame through vertically-arranged rotating shafts, the front cabin collecting device further comprises first hydraulic oil cylinders, cutting mechanisms and shrinkage mechanisms, wherein the first hydraulic oil cylinders are located on the two sides of the front cabin frame respectively, the two ends of each first hydraulic oil cylinder are connected to the front cabin frame and the corresponding collecting arm respectively, the cutting mechanisms are arranged at the front ends of the collecting arms on the two sides and can longitudinally cut aquatic plants, and the shrinkage mechanisms can shrink the harvesting scissors to the portion below the conveyor belt. The water surface cleaning boat can collect water surface floating objects such as waterweeds, water hyacinth and floating rubbish of different types, under the effect of the shrinkage mechanism, unloading of the front cabin collecting device is facilitated, the structure is simple, and implementation is convenient.

The present disclosure is directed towards determining, at sea, the respective weights of fish species that are part of a fish catch. By way of the present disclosure, images of a fish catch are taken using triangulation techniques involving stereo-photogrammetry. According to one embodiment, a method for estimating a total weight of a fish catch includes receiving a fish catch on a fishing vessel and capturing images of the fish catch. From the images, fishes are identified and the species to which the corresponding fishes belong are also identified. Using the images, lengths of the identified fishes as well as the total volume occupied by the fish catch are determined, which can be used to estimate the total weight of the fish catch.

The invention provides a low-temperature early-strength high-strength underwater grouting material. The low-temperature early-strength high-strength underwater grouting material consists of the following ingredients in parts by weight: 30-45 parts of ordinary Portland cement, 45-60 parts of fine aggregate, 5-10 parts of mineral powder, 2-4 parts of encryption silica fume, 0.5-1 part of a compound expanding agent, 0.2-0.5 part of an early-strength powdery water reducer, 0.1-0.5 part of nano hydrated calcium silicate, 0.3-0.5 part of a compound early-strength agent and 0.1-0.3 part of a dispersion-resistant compound. The low-temperature early-strength, low-temperature high-strength and dispersion resistant properties of the low-temperature early-strength high-strength underwater grouting material in water are improved at the same time in the four aspects of reducing the void ratio of the aggregate, optimizing the expanding components and improving the nano early strength and the dispersion resistance, the construction performance, such as the water holding performance and the viscosity, of the grouting material are remarkably improved, the 1d strength and the 28d strength of the grouting material under the undersea low-temperature condition are effectively improved, and the underwater dispersion resistance of the grouting material can be greatly improved. The low-temperature early-strength high-strength underwater grouting material has favorable low-temperature early-strength, low-temperature high-strength and underwater dispersion resistant functions.

The invention relates to a rotatable fairing (1) for a marine riser (2) or other slender marine structure. The fairing (1) is arranged on the riser for reducing watercurrent-induced stresses on said riser (2), said fairing (1) having a tail portion (3) for trailing generally in the downstream direction behind said riser. The fairing (1) is provided with an attenuation unit (8) for counteracting the unstable rotation of said fairing (2) relative to said riser (2), in order to prevent undesired vibrations of said riser (2). The fairing is provided with one or more clamps (10) for attachment to and around a periphery of said riser (2), said clamps (10) arranged with a gear rim (12) for engagement with an actuating cogged wheel (14) of said attenuation unit (8).

A system and method for state estimation of a surface of a platform at sea, includes receiving sensor signals indicative of LIDAR data for the platform; applying a Bayesian filter to the LIDAR data for a plurality of hypotheses; determining vertical planes representing azimuth and elevation angles for the LIDAR data; applying a robust linear estimation algorithm to the vertical planes; and determining candidate points in response to the applying of the robust linear estimation algorithm.

A method for estimating a portion of undesired particles in crop material includes taking a photograph of the crop material; identifying images of at least one type of undesired particle in the photograph that was taken; measuring the surface area covered by the image of every particle shown in the photograph; and determining the portion of undesired particles as a proportion of the surface area of the images, and may be used, in particular, in a harvesting machine on the crop material picked up in an on-going harvesting operation.

An object detection network can be trained with training images to identify and classify objects in images from a sensor system disposed on a maritime vessel. The objects in the images can be identified, classified, and heat maps can be generated. Instructions can be sent regarding operation of the maritime vessel. For some training images, water conditions, sky conditions, and / or light conditions in the image can be changed to generate a second image.

The invention discloses a sea clutter simulation method based on a sea wave spectrum model and mainly solves the problem that it is difficult to reflect wave height details on a sea surface in the prior art. The realization scheme is characterized by 1) establishing the sea surface based on the sea wave spectrum model; 2) determining sea surface range under irradiation of a radar main wave beam; 3) selecting a rectangular frame in the sea surface range, and carrying out discretization on the sea wave in the frame to form a complex surface formed by splicing a plurality of equal-area triangle scattering units; 4) calculating attribute parameters and echo power of each triangle scattering unit; 5) establishing an echo model of the triangle scattering units according to the echo power; and 6) generating echo waves of the triangle scattering units of the sea surface in the rectangular frame according to the echo model, judging radar visibility of the triangle scattering units, calculating and superposing the echo waves of all visible triangle scattering units and generating sea clutter simulation data and analyzing the data. The method improves sea clutter simulation reliability and practicality, and can be used for target detection.

The embodiment of the invention provides a low-permeability oil reservoir water flooding wave and coefficient evaluation method, which comprises a longitudinal wave and coefficient evaluation method and a plane wave and coefficient evaluation method, wherein the longitudinal wave and coefficient evaluation method comprises the following steps that: longitudinal wave and coefficient main control factors of a low-permeability oil reservoir are determined; a sand body communication coefficient is introduced for modifying longitudinal waves and a prediction formula; sensitivity analysis is carried out; and a plate is drawn, so that the looking-up is convenient. The plane wave and coefficient evaluation method comprises the following steps that: through coordinate conversion, the permeability of the low-permeability oil reservoir during anisotropy is converted into the permeability during isotropy; the water flooding wave and region area is determined by considering the anisotropy and the starting pressure gradient; the well control region area is determined, a ratio of the water flooding wave and region area to the well control region area is determined to be the plane wave and coefficient of the low-permeability oil reservoir. The embodiment of the invention realizes the water flooding wave and coefficient evaluation of the low-permeability oil reservoir, and the basis and the regulating direction are provided for low-permeability water flooding yield improvement.

The invention relates to a waterpower gravity type vertical ship lift. A ship chamber and a gravity water chamber are caused to be in butted joint by an assembly pulley and a steel cable winding system of a wound roll in the way of bilateral balance so as to cause the lifting points of the ship chamber and the gravity water chamber to be in mutual rigid connection, thereby benefiting the maintenance of favorable synchronization during up and down running. When the ship chamber needs to be descended, water in the gravity water chamber is discharged; and when the ship chamber needs to be lifted, water is added to the gravity water chamber. By changing the gravity difference of counterpoise on both sides, the abrasion resisting moment of the steel cable winding system is overcome, thereby causing a ship reception chamber to be moved up and down and realizing the navigable butted joint of upstream and downstream water levels. A method for adding water to the gravity water chamber is as follows: by enlarging the area of a feed water inlet, the flow of the water is decelerated, and the mode of multi-layer water supply is adopted so as to reduce the water supply drop height of the feed water inlet and the gravity water chamber. The water flows out from overflow pore plates of a water storage chamber in a way of overflow and then flows downwards into the gravity water chamber along water curtain wall plates.

The invention discloses a sea clutter suppression method for a marine radar. Most of the existing marine radars can not process the nearby sea clutter, and the existing sea clutter suppression methods usually suppress the sea clutter according to a fixed template, which can result in the great attenuation in the amplitude of a nearby target signal or even result in miss detection. The sea clutter suppression method provided for overcoming the above disadvantages comprises the following steps: initializing parameters and data, estimating parameters, suppressing the sea clutter and updating an estimation sample. The method can estimate the sea clutter according to different sea clutter distributions selected according to different sea conditions, and determine whether the sample data need to be updated for re-estimation according to the suppression effect, thereby maximally reducing the influence to the target while suppressing the sea clutter as much as possible, and obviating the great attenuation in the amplitude of the nearby target signal.

The invention belongs to the field of wave remote sensing technology, and particularly relates to a method for conducting X wave band navigation radar wave parameter inversion through a band-pass filter based on a novel wave dispersion relation, wherein sea clutter images are obtained through navigation radar so that wave parameter inversion can be conducted. The method comprises the steps that radar image data are collected; radar images are preprocessed; Fourier transform is conducted on an image sequence under a Cartesian coordinate system, so that a three-dimensional wave number frequency image spectrum of the radar images is obtained; wave spectrum information is extracted; wave information inversion is achieved. Influence on the dispersion relation by the ship speed is kept by the filter, the problem that the band pass of a traditional broadband-pass filter is increased along with increase of the movement speed is effectively solved, and therefore filtering can be conducted under the condition that a radar platform is moved along with movement of a ship. In band pass boundary derivation of the novel filter, an approximate value of any quantity is avoided, calculation errors are reduced, influence on the band pass boundary is avoided, band width calculation is more accurate, and wave inversion accuracy is improved.

Methods and arrangements for determining a layout and dimensions of a wind farm. A three-dimensional wake model for a wind farm is generated, and a positioning and dimensioning model for turbines of the wind farm is developed based on the three-dimensional wake model.

The invention discloses a method obtaining sea ship system average collision risks. The method includes: layering and simplifying a topological structure of the whole sea intelligent transport network at one moment through a reduction algorithm based on hierarchical clustering, eliminating ships without consideration of collision risks, basing the collision risks of collision preventation systems of two ships, and obtaining system collision risks from subsystems to the whole sea transport network through a weighted average fusion method from bottom to top.

The invention belongs to the technical field of constructional steel for ships and ocean engineering and in particular relates to steel plates for a 355MPa-level easy-to-weld ocean platform and a production process of the steel plates. Two steel plates of which the thickness specifications are [6-40]mm and [40-60]mm are comprised, wherein the steel plate with the thickness specification of [6-40]mm comprises the following chemical components in percentage by mass: 0.10-0.15 percent of C, 0.20-0.50 percent of Si, 1.20-1.50 percent of Mn, not more than 0.015 percent of P, not more than 0.005 percent of S, 0.020-0.050 percent of Nb, 0.010-0.050 percent of V, 0.008-0.020 percent of Ti, 0.015-0.055 percent of Als, not more than 0.43 percent of Ceq, not more than 0.23 percent of Pcm and the balance of Fe and inevitable impurities; and the steel plate with the thickness specification of [40-60]mm comprises the following chemical components in percentage by mass: 0.10-0.15 percent of C, 0.20-0.50 percent of Si, 1.30-1.60 percent of Mn, not more than 0.015 percent of P, not more than 0.005 percent of S, 0.030-0.060 percent of Nb, 0.020-0.060 percent of V, 0.008-0.020 percent of Ti, 0.015-0.055 percent of Als, not more than 0.12 percent of Nb+V+Ti, not more than 0.43 percent of Ceq, not more than 0.23 percent of Pcm and the balance of Fe and inevitable impurities. According to the production method, the steel plates for the easy-to-weld ocean platform are produced by adopting low Ceq, low Pcm, Nb as well as V and Ti microalloy components and a normalizing heat treatment process and are lower in production cost, even in mechanical property and favorable in welding property.

The invention discloses a method and a system for planning a sea path of an unmanned ship based on an RRT (rapidly-exploring random tree) algorithm. The method comprises the following steps of obtaining data of a sea map, so as to obtain complete information of the sea map; according to the definition of a polygon of the sea map, displaying the conditions of the sea surface, and rasterizing the original vector data, so as to obtain a complete interface of the sea map; enabling a user to set passing points on the interface of the sea map, and planning the path within the preset time threshold value by an improved RRT algorithm, so as to obtain the final asymptotically optimal effective path; converting the final effective path into the practical longitudinal and altitude information, outputting the longitudinal and altitude information of turning points on the path, and providing for a power control system of the unmanned ship to use. The method has the advantages that the RRT algorithmis further improved, the path passing the multiple preset passing points is planned, and a path compression algorithm is applied so as to effectively reduce the path distance.

The invention discloses a shallow sea water depth inversion method based on high-spectrum data of a blue-yellow wave band. Currently, models which perform depth inversion on clean water body through an optical remote sensing facility are mostly established for aiming at multiple-spectrum data. The algorithm is restricted by wide spectrum data wave band and little spectrum information. The inversion precision is largely affected by type of water body sediment. The invention provides a novel method for inversing shallow sea water depth of the clean water body through utilizing the high-spectrum data of the blue-yellow wave band (450-610 nanometers) according to a water body optical attenuation mechanism based on the high-spectrum data. The method can accurately extract shallow sea water depth distribution information within 30 meters. Furthermore one algorithm coefficient calibration is required for one remote sensor, thereby remarkably improving universality of the algorithm.

The invention discloses a method and a device for achieving sea wave energy transformation by using inertance, belonging to the technical field of sea wave energy utilization. With the adoption of the method and the device, the main technical problem of economically converting the sea wave energy into other energy modes which are convenient to use is solved. The method and the device are characterized in that a floating loading container is arranged on the sea; an inertial body is arranged in the loading container; random force and displacement which are difficult to use, are located between the inertial body and the loading container and produced by pushing effects of the sea wave are converted into force and displacement which can be directly used, and then an energy conversion device is used for converting the force and the displacement which can be directly used into hydraulic energy or electric energy. The method and the device are applicable to the technical fields of development and utilization of the sea wave energy, in particular to sea wave generation.

The invention belongs to the field of video image enhancement, and particularly relates to a video image sea fog removal and clearing method which integrates frame difference method background estimation with the rapid single-frame sea fog removal algorithm based on edge detection and is used for an offshore aircraft rapid video image sea fog removal and clearing system. The video image sea fog removal and clearing method includes the steps of obtaining a sea fog video image, conducting sea fog removal and clearing on a single-frame sea fog image, and conducting sea fog removal and clearing on the video image. The video image sea fog removal and clearing method is suitable for all offshore aircrafts, and performance of visual systems of the offshore aircrafts in sea fog can be greatly improved. The operating speed is high, and sea fog removal and clearing can be conducted on the video image in real time in the sea surface scene. Compared with other algorithms, the rapid single-frame sea fog removal algorithm has a good edge keeping effect. The method has the advantages of being remarkable in fog removal effect and good in image restoration effect. The detecting performance, the tracking performance and the recognizing performance of targets in the later period can be effectively improved with sea fog removal and clearing as earlier stage processing on the visual systems.

The invention discloses an oil shale mining method which comprises the steps of forming a first channel in the oil shale leading to the ground; forming a second channel leading from a coal bed below the oil shale to the ground, and a third channel communicated with the second channel and leading from the coal bed to the ground; carrying out underground gasification on the coal bed in order to form a burning-out area; and collecting oil gas. The invention further provides an oil shale mining device, the coal bed is located below the oil shale; the device comprises: a first channel arranged in the oil shale and leading from the oil shale to the ground, a second channel arranged in the coal bed and leading from the coal bed to the ground, wherein the first channel is located above the second channel, and a third channel communicated with the second channel and leading from the coal bed to the ground. According to the oil shale mining method and the device, the energy utilization rate is enhanced, and the coal gas is prepared from the oil shale by in-situ dry distillation without using an artificial heat source.

A towel (1) having closeable pockets (4), a two-chambered compartment (6), fastening devices (5), and adjustable carrying straps (7) is provided, wherein the towel is useful for the beach, the swimming pool, a picnic, or any other leisure activity involving sitting or reclining on a relatively unimproved underlying surface from which the user may wish to be insulated.