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64results about How to "Improve application versatility" patented technology

Method for navigating and positioning aerocraft based on landmark capturing and tracking

The invention discloses a method for navigating and positioning an aerocraft based on landmark capturing and tracking, which belongs to the field of navigation and guidance for carrying out error correction on an aerocraft inertial navigation system. The method comprises that: the aerocraft captures a landmark along an airway, once the landmark is captured, aerocraft positioning is started. The aerocraft is positioned according to the following mode: acquiring measurement data related to the position of the aerocraft at time of t-delta t, t and t+delta t, and making the delta t more than zero second and less than 1 second; calculating coordinates of the aerocraft in a coordinate system of the landmark; calculating geodetic coordinates of the aerocraft according to the geodetic coordinates of the landmark; and finally, carrying out positioning and error correction on the inertial navigation system by the geodetic coordinates of the aerocraft. In the method, the type of the landmark can be plane type or solid type, can capture the landmark under the forward view or downward view imaging condition; and the position of the aerocraft can be calculated through adopting the measurement data of three adjacent sampling points so as to effectively improve the positioning precision with good reliability. Therefore, the method is suitable for navigating and positioning the aerocarft with a remarkable landmark in a flight path plan.
Owner:HUAZHONG UNIV OF SCI & TECH

Full reference image quality evaluation method based on combination of spatial-domain and frequency-domain analysis

ActiveCN108830823ASolve the problem of low subjective perception consistencyImprove robustnessImage enhancementImage analysisImaging qualityVisual perception
The invention discloses a full reference image quality evaluation method based on the combination of spatial-domain and frequency-domain analysis. The method comprises firstly performing color space conversion on reference and distortion images in a database; secondly extracting reference image and distortion image spatial-domain gradients and frequency-domain phase features to calculate a globalmaximum structural feature similarity; calculating frequency-domain texture and spatial frequency feature similarity, and spatial-domain color feature similarity, and forming a 9-D feature vector in combination with the global maximum structural feature similarity; establishing a regression model according to random forest RF to fuse the feature vector and an subjective MOS value, and performing training; and finally extracting the 9-D feature vector of an image to be tested and inputting the 9-D feature vector into the trained regression model to achieve high-precision image quality prediction so as to achieve objective image quality evaluation. The method realizes high-precision objective evaluation of the full reference image quality, and can maintain high consistency with human visualcharacteristics.
Owner:XIAN UNIV OF TECH

Full-reference image quality evaluation method based on masking texture features

ActiveCN109191428AImprove robustnessSolve the problem of low subjective perception consistencyImage enhancementImage analysisPattern recognitionImaging processing
The invention discloses a full-reference image quality evaluation method based on masking texture features, belonging to the technical field of image processing and image quality evaluation. Firstly,the reference image and the distorted image are converted into color space. Secondly, the gradient amplitude and gradient direction of the reference image and the distorted image are extracted and thesimilarity of the gradient information of the image is calculated. Then, the similarity and color difference of the texture features are calculated and the mean and standard deviation of the similarity and color deviation are counted, a 6-Deigenvector is formed, according to that random forest, a regression model is established to fuse the characteristic vector and the subjective MOS value, and the training is carried out. Finally, the 6-D eigenvectors are input into the trained regression model to complete the objective image quality evaluation. The evaluation method disclosed by the invention adopts three different similarity characteristics, uses random forest to establish regression model, realizes full-reference image quality to carry out high-precision objective evaluation, and canmaintain high consistency with human visual characteristics.
Owner:XIAN UNIV OF TECH

Front view terminal guidance navigation positioning method of aircraft

The invention discloses a front view navigation positioning method of an aircraft, comprising two stages of a remote navigation stage and a distance navigation stage; in the remote navigation stage, the position of the landmark centroid in a real-time figure is firstly identified, the estimated position of target centroid in the real-time figure is calculated by combining the position deviation between the target centroid and the landmark centroid in the geodetic coordinate system and current aircraft imaging attitude parameters furthermore, the relevant position difference value of the aircraft is calculated, and then a target search area is selected by taking the estimated position of the target centroid in the real-time figure; in the distance navigation stage, the target is directly positioned in the target search area, and then the relevant position difference value of the aircraft is calculated according to the direct positioning result. By means of landmark identification of the peripheral areas of the target, the target can be indirectly positioned for navigation, ensuring the robustness and adaptability of aircraft navigation positioning and overcoming the defect that the aircraft can be not directly positioned and navigated in the process of flight because the aircraft deviates from a planned flight path owing to errors.
Owner:HUAZHONG UNIV OF SCI & TECH

Method and device for automatically sorting tobacco leaves based on neural network

ActiveCN110479636AAutomatic sorting intelligenceAutomatic sorting is efficientTobacco preparationSortingSpectral analysisComputer science
The invention provides a method and device for automatically sorting tobacco leaves based on a neural network. The method comprises the following steps of collecting natural light pictures of trainingtobacco leaves, and analyzing the natural light pictures according to the preset tobacco leaves characteristic dimension information to obtain natural characteristic information data of the trainingtobacco leaves; performing spectral analysis on the training tobacco leaves to obtain spectral characteristic information data of the training tobacco leaves; corresponding to natural characteristic information data and spectral characteristic information data of the training tobacco leaves, and performing neural network training to obtain a correlation model of natural characteristics and spectral characteristics of the tobacco leaves; establishing the spectral tobacco leaves grading strategy of the tobacco leaves according to the spectral characteristic information data, and obtaining natural grading strategy of the tobacco leaves based on the correlation model; acquiring natural images of the tobacco leaves to be sorted, analyzing to obtain the natural characteristic information data ofthe tobacco leaves to be sorted, comparing the natural characteristic information data with the natural grading strategy to obtain the sorting grade of the tobacco leaves to be sorted, and sorting the tobacco leaves to be sorted according to the sorting grade. According to the method and device, intelligent, efficient, standardized and low-cost tobacco leaves sorting is realized.
Owner:SHENZHEN MICROBLUE INTELLIGENCE TECH CO LTD

Method for preparing nicotinamide-coated multivesicular liposomes

The invention relates to a method for preparing nicotinamide-coated multivesicular liposomes. The nicotinamide-coated multivesicular liposomes are prepared from phospholipid, neutral lipid, cholesterol, an organic solvent, a hydrophilic emulsifier, nicotinamide, amino acid, an osmotic pressure regulator and deionized water. The method comprises the steps: dissolving the phospholipid, the cholesterol and the neutral lipid in the organic solvent, so as to obtain an organic phase; uniformly mixing the nicotinamide, the amino acid, the osmotic pressure regulator and the deionized water, so as to obtain an internal water phase; homogenizing the organic phase component, and adding the internal water phase component into the organic phase component, so as to prepare a W/O primary emulsion; mixing the hydrophilic emulsifier, the amino acid, the osmotic pressure regulator and the deionized water, and carrying out dispersing, so as to obtain an external water phase; homogenizing the external water phase component, adding the W/O primary emulsion component into the external water phase component, carrying out homogenizing, then, carrying out ultrasonic treatment, and then, cooling the mixture to room temperature with stirring, so as to form a W/O/W multiple emulsion; dispersing the multiple emulsion into an amino acid solution, introducing nitrogen gas into the solution to remove the organic solvent, thereby obtaining a nicotinamide-coated multivesicular liposome suspension. According to the method, the stability of the nicotinamide is improved.
Owner:SHANGHAI INST OF TECH

Portable nursing bed and installation and use methods

The invention discloses a portable nursing bed. The portable nursing bed comprises an outer frame, a mattress is disposed on the top of the outer frame, and the mattress comprises end plates, peripheral side plates, and an inner frame. The end plates and the peripheral side plates are detachably installed on the outer frame, and the inner frame is movably disposed in a space defined by the peripheral side plates and the end plates. The invention also discloses a method for installing and using the portable nursing bed, the method comprises the following steps: S1, the assembly of the outer frame; S2, the assembly of the inner frame; S3, the assembly of a fouling mechanism; S4, the assembly of the support mechanism; S5, the overall assembly, the assembled outer frame is inverted, and the inner frame is inverted within the outer framework. The portable nursing bed is easy to assemble and disassemble, thereby making the bed convenient for transportation. The entire nursing bed of the invention is assembled by using multiple parts, and the nursing bed is convenient to assemble and disassemble, and can be disassembled into multiple parts for transportation, thereby improving the versatility of the application. At the same time, the individual part can be disassembled and replaced separately when damaged, thereby realizing the recycling of resources, prolonging the service life, andreducing maintenance costs.
Owner:上海立忱智能科技有限公司
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