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82results about How to "Achieve division" patented technology

Method for effectively segmenting hyperspectral oil-spill image

Provided is a method for effectively segmenting a hyperspectral oil-spill image. The method comprises steps of: defining an initial level set function and other related functions; acquiring a new fitting item in combination with a Fisher criterion; constructing an edge stop function to obtain a new length item; performing improvement in combination with an end member extraction algorithm; introducing a level set regular item to prevent reinitialization of the level set function; minimizing an energy function to obtain an Euler-Lagrange equation; setting parameters; selecting a display band and an initial contour; displaying a segmentation result graph; calculating various segmentation precision evaluation indexes; comparing and evaluating the accuracy of the segmentation results. The method can classify a target area in a simulated hyperspectral image and a real hyperspectral image, and effectively segments the hyperspectral oil-spill image with boundary blur and noise, improves the segmentation accuracy of the hyperspectral image, obtain a more accurate classification effect, makes the parameter change more stable, makes the contour curve more accurate, obtains the continuous and closed boundary contour, and has higher precision of segmentation.
Owner:DALIAN MARITIME UNIVERSITY

Method for extracting parking lot structure under main direction restriction

The invention discloses a method for extracting a parking lot structure under main direction restriction. The method comprises the following steps of: performing initial line segment detection on an aviation orthoimage by using an Edison algorithm and Hough transformation so as to acquire a main direction of a parking space line; detecting a correct parking lot line by using a line segment extraction method under the main direction restriction according to the acquired main direction; grouping and screening the parking lot line according to an angle of the parking lot line and dividing parking lanes by using a maximum intersecting direction method; calculating structural parameters of a parking lot by the extracted parking lot line and the divided parking lanes; and re-building a correct parking space line of the parking lot according to the structural parameters of the parking lot so as to generate a segment line of each parking lane to finish automatic extraction of the parking lot structure. According to the method, the main direction of the parking space line can be acquired by using the initial line segment detection, the parking space line is extracted by using the main direction as the restriction, so that the accuracy, the completeness and the positioning accuracy of the extracted parking space line are high, and an evidence is provided for extracting the parking lot structure; and moreover, the parking lot structure is extracted by using single-scene aviation orthoimages as data, so that the data are easily acquired, and the acquisition cost of the data is low.
Owner:NANJING UNIV

Inspection target positioning method and device for photovoltaic scene and readable storage medium

The invention belongs to the field of unmanned aerial vehicle inspection, and discloses an inspection target positioning method and device for a photovoltaic scene, and a readable storage medium, andthe method comprises the following steps: S1, presetting a global map of a photovoltaic scene; S2, obtaining all frames of visible light images of photovoltaic scene inspection; S3, obtaining pixel coordinates of each photovoltaic unit array and each photovoltaic unit in the visible light image; S4, determining the position of each photovoltaic unit in the visible light image in the photovoltaic unit array containing the photovoltaic unit; s5, determining a corresponding relationship between the photovoltaic unit array in the visible light image and the global map, and determining a corresponding relationship between each photovoltaic unit in the visible light image and the global map; and S6, determining the logic number of the polling target photovoltaic unit in the global map. Through the positioning mode of firstly tracking and positioning the photovoltaic unit and then mapping the photovoltaic unit array, the problem that the photovoltaic unit is difficult to position in photovoltaic inspection can be effectively solved, and the efficiency of finding the inspection target photovoltaic unit by a worker is greatly improved.
Owner:西安因诺航空科技有限公司

Multistage wheel disc rotor structure interactive design method driven by geometrical features

The invention provides a multistage wheel disc rotor structure interactive design method driven by geometrical features and oriented to engineering requirements. The method comprises the following steps of 1, inputting control point coordinate values of a multistage wheel disc meridian plane geometrical structure; 2, building a multistage wheel disc structure axisymmetric finite element model forthe multistage wheel disc meridian plane geometrical structure; 3, analyzing the structure of the built multistage wheel disc structure axisymmetric finite element model; 4, obtaining the multistage wheel disc meridian plane geometrical structure which meets the design requirement and outputting a CAD model. Through the steps, the change of the control point coordinate values of the multistage wheel disc meridian plane geometrical structure can be automatically displayed, the working efficiency of designing a multistage wheel disc structure is improved to a great extent, the problems existingin the prior art during design that the time and labor cost are wasted when an optimizing algorithm is not steady, and artificial remodeling is needed once the scheme is changed during design in the prior art are solved, and finite element mesh dividing and multistage wheel disc structure design can be achieved.
Owner:BEIHANG UNIV

Flight path-based aviation ad hoc network clustering method and computer readable storage medium

The invention relates to a flight path-based aviation ad hoc network clustering method and a computer readable storage medium, and belongs to the technical field of aviation communication. The clustering method comprises the following steps: 1) pre-storing geographical cluster information corresponding to a corresponding geographical position on an aircraft flight path; wherein the geographical cluster information comprises a geographical cluster identifier and an intra-cluster position; 2) in the flight process of the aircraft, acquiring the current geographical position of the aircraft in real time; 3) searching matched geographical cluster information according to the current geographical position; and 4) updating own geographical cluster information according to the geographical cluster information matched in the step 3). According to the invention, the geographical cluster information corresponding to the corresponding geographical position on the flight path of the aircraft is stored before the aircraft flies. The updating of the geographical cluster information can be realized only by acquiring the current geographical position in the flight process of the aircraft, so thatthe problems of poor communication real-time performance and low efficiency caused by real-time calculation of clustering related information in the flight process of the aircraft are avoided.
Owner:HENAN UNIV OF ANIMAL HUSBANDRY & ECONOMY

Quaternion-based sea surface oil spill identification method and system

ActiveCN113189016AEasy to identify with human eyesIntuitive Image Object RecognitionPolarisation-affecting propertiesCharacter and pattern recognitionOil spillColor model
The invention relates to the field of sea surface oil spill detection, and provides a quaternion-based sea surface oil spill identification method and system. The method comprises the steps of 1, collecting reflected polarized light reflected from a target object at different polarization angles, and converting the reflected polarized light into an electric signal, so as to obtain a polarization image of the target object, 2, obtaining a polarization parameter according to the polarization image, 3, projecting the polarization parameters into an HSV color model, and conducting normalization processing on the polarization parameters, 4, combining the quaternion with a Fresnel formula, and performing oil film identification according to a reflected light quaternion expression, and 5, verifying the equivalence relationship between the quaternion-form Poincare ball and Stokes, marking quaternion expressions of different oil films on the Poincare ball, and realizing identification of various oil films at different positions of the Poincare ball surface by the quaternion expressions of different oil films. Division of an oil film area and a water surface and identification and detection of types of spilled oil can be realized.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Deep learning and transfer learning-based rock stratum structure intelligent detection and classification method

The invention belongs to the technical field of rock stratum detection, and discloses a Deep learning and transfer learning-based rock stratum structure intelligent detection and classification method, and the method comprises the steps of obtaining the existing drilling image data and acoustic logging information, processing the obtained corresponding information, and constructing a feature database with a label; classifying and sorting into a training set and a test set which can be used for a deep neural network model according to a feature database; based on the acquired drilling image data and acoustic logging information, respectively constructing a sensing network; verifying the reliability of the trained sensing network through a field drilling test, and carrying out model feedback optimization; and performing intelligent detection and classification of the rock stratum structure based on the optimized sensing network. According to the invention, intelligent detection and real-time classification statistics of rock stratum structure characteristics are realized, and a basic condition is laid for practical application of an intelligent identification and real-time classification method of a deep rock stratum structure in field drilling exploration.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI

Grouting anchor rod cable combined beam for advanced supporting of deep broken surrounding rock and support method

ActiveCN112196596AOvercome the defect of prone to shear failureAvoid failureConstructionsUnderground chambersRock boltWedge cushion
The invention discloses a grouting anchor rod cable combined beam for advanced supporting of deep broken surrounding rock and a supporting method. Square protective plates are fixed to the two ends ofa steel beam respectively, anchor cable holes are formed in the center of the steel beam and the centers of the protective plates, and the hole diameter is larger than the diameter of anchor cables;four anchor rod holes are formed in the protective plates, each anchor rod hole corresponds to one wedge-shaped cushion block, the plane of each wedge-shaped cushion block is tightly attached to the protective plates, the arc-shaped portions of four trays face the centers of the protective plates, grouting anchor rods sequentially penetrate through the trays and the protective plates and are fixedin a roof rock stratum through anchoring agents, and the free ends of the anchor rods apply pre-tightening force through nuts; and the anchor cables penetrate through the anchor cable holes and are fixed in an overlying stable rock stratum through the anchoring agents, and the free ends of the anchor cables are fixed through a rigging. According to the grouting anchor rod cable combined beam foradvanced supporting of deep broken surrounding rock and the supporting method, the shallow part and the deep part of a mining roadway are sequentially grouted and constructed by utilizing the combinedbeam, so that graded progressive reinforcement of the surrounding rock of the mining roadway from shallow to deep and from outside to inside is realized, and the control and maintenance of the miningroadway under the conditions of weak and broken roofs are facilitated.
Owner:SHANDONG UNIV OF SCI & TECH

Portable food detection box

The invention relates to the technical field of food detection boxes, in particular to a portable food detection box. The portable food detection box comprises a food detection box body, a storage box is arranged on the surface of the food detection box body, a center column is arranged on a bottom plate of the storage box, a plug plate is arranged on the top surface of the center column, and connecting screw holes are formed in the top surfaces of the plug plate and the center column. A locking screw rod is inserted into the connecting screw hole, the locking screw rod is in threaded connection with the surface of a sealing plate, a butt joint groove is formed in the bottom surface of the sealing plate, and a plug plate is inserted into the butt joint groove; the portable food detection box has the beneficial effects that the storage boxes are additionally arranged on the two sides of the portable food detection box to collect and store sampling pipes, after the sampling pipes are inserted into limiting seats, supporting strips are expanded outwards, clamping heads extrude damping fins to be attached to the surfaces of the sampling pipes, the sampling pipes are prevented from bumping, the two storage boxes expand the sample collection space of the food detection box, and the locking screw rod can be driven to be screwed on the central column by screwing the handle, so that the sealing plate is fixed.
Owner:王正贵

A parking lot structure extraction method under the constraint of main direction

The invention discloses a method for extracting a parking lot structure under main direction restriction. The method comprises the following steps of: performing initial line segment detection on an aviation orthoimage by using an Edison algorithm and Hough transformation so as to acquire a main direction of a parking space line; detecting a correct parking lot line by using a line segment extraction method under the main direction restriction according to the acquired main direction; grouping and screening the parking lot line according to an angle of the parking lot line and dividing parking lanes by using a maximum intersecting direction method; calculating structural parameters of a parking lot by the extracted parking lot line and the divided parking lanes; and re-building a correct parking space line of the parking lot according to the structural parameters of the parking lot so as to generate a segment line of each parking lane to finish automatic extraction of the parking lot structure. According to the method, the main direction of the parking space line can be acquired by using the initial line segment detection, the parking space line is extracted by using the main direction as the restriction, so that the accuracy, the completeness and the positioning accuracy of the extracted parking space line are high, and an evidence is provided for extracting the parking lot structure; and moreover, the parking lot structure is extracted by using single-scene aviation orthoimages as data, so that the data are easily acquired, and the acquisition cost of the data is low.
Owner:NANJING UNIV

Device and method for sending data after reconstruction of BBU and RRU functions

The invention relates to a device and a method for sending data after reconstruction of BBU and RRU functions; the device for sending data comprises an interface determining module and a data sendingmodule, wherein the interface determining module is used for determining an interface between a centralized unit and a distribution unit; the data sending module is used for sending a data package processed by the centralized unit to the distribution unit through the interface and sending the data packet to a receiving end after being continuously processed by the distribution unit, wherein the centralized unit and the distribution unit are obtained by dividing all functional modules of a base station, all the functional modules of the base station are divided into a centralized unit and a plurality of distribution units, the centralized unit comprises a plurality of functional units which are in one-to-one correspondence with the distribution units, the functional modules contained in each distribution unit are different or the same, and the distribution units and the corresponding functional units jointly comprise all the base station functional modules. According to the device and the method, the functional modules can be flexibly divided between the centralized unit and the distribution units, so that rapid and convenient network deployment is realized.
Owner:ZTE CORP
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