13results about How to "Remarkable effect" patented technology

The invention discloses a reservoir bank slope crack identification method based on unmanned aerial vehicle inspection and digital images, and relates to the technical field of reservoir bank slope inspection. 2, image preprocessing: preprocessing the data by adopting processing methods of graying, gray enhancement and bilateral filtering; 3, crack identification: identifying reservoir bank slope cracks in the image by adopting methods of threshold segmentation, edge detection and supervised classification; 4, crack pixel filtering: performing filtering processing on the extracted crack image by adopting morphological closed operation, length filtering and direction filtering; and 5, model fusion: fusing the threshold segmentation model, the edge detection model and the supervised classification model together by adopting a minimum-risk Bayesian probability method. The method shows remarkable applicability and effect in large-range and multi-form crack identification and investigation, and shows high robustness when processing crack images with different scales, shapes and backgrounds, and the accuracy of the method can stably reach more than 90%.

The invention discloses a quasi-zero stiffness metamaterial vibration reduction mounting structure of an underwater vehicle hydrophone, which belongs to the technical field of underwater vehicles, and comprises an oil seal end cover mounted at the front end of a front fairing of an underwater vehicle, a mounting rack fixed at the front end part of the oil seal end cover, and two quasi-zero stiffness vibration reduction components arranged in front of and behind the mounting rack, the outer side parts of the quasi-zero-stiffness vibration reduction components are connected with the mounting frame, concave parts for clamping the end parts of the hydrophone are formed in the middle parts of the quasi-zero-stiffness vibration reduction components, and a mounting space for arranging the hydrophone is formed between the two quasi-zero-stiffness vibration reduction components; and the two ends of the hydrophone are respectively clamped and clamped in the concave parts of the two quasi-zero stiffness damping components. According to the quasi-zero-stiffness metamaterial damping device, through conformal design, vibration attenuation, structure optimization and energy-saving effects, an efficient, stable and low-noise hydrophone installation solution is provided for an autonomous underwater vehicle, and the performance of the quasi-zero-stiffness metamaterial damping device in underwater detection and signal acquisition is remarkably improved.

The invention provides an unmanned aerial vehicle path planning method based on a river horse state optimization particle swarm algorithm, and the method comprises the steps: obtaining the coordinates of a static obstacle, and carrying out the environment modeling through a grid method; initializing a particle swarm, and establishing a global path optimization function by taking the shortest driving path and no collision with an obstacle as a target; and optimizing the particle swarm optimization algorithm through a Heman state mechanism to obtain an improved particle swarm optimization algorithm, and solving the global path optimization function through the improved particle swarm optimization algorithm to obtain a global planning path. According to the unmanned aerial vehicle path planning method based on the river horse state optimization particle swarm algorithm, a traditional particle swarm algorithm is optimized by combining a river horse state mechanism, adaptive adjustment of algorithm parameters is achieved, the convergence speed and global search capability of path planning are improved, and the precision and efficiency of path planning are improved.

The invention discloses an evaluation and life prediction method for a fuel cell metal pole plate coating, and belongs to the technical field of fuel cell testing. The method is used for predicting the service life under the condition of simulating the working condition of the fuel cell, and comprises the following steps: firstly, determining the corrosion potential of a fuel cell metal pole plate coating through potentiodynamic scanning; the method comprises the following steps: taking a corrosion potential as a starting point, slowly increasing the potential in an operation environment close to a cathode of a fuel cell, continuously scanning until electrochemical corrosion occurs or the potential reaches 1.6-3.0 V (vs.RHE), and finally measuring the contact resistance change of the sample under the pressure of 1.4 MPa for predicting the service life of a pole plate coating in the operation environment of the fuel cell. The attenuation of the pole plate coating in the long-time operation process of the fuel cell is estimated through the change of the contact resistance of the pole plate, including the calculation of the corrosion rate of the coating in the operation environment of the fuel cell and the like, so that the prediction result of the service life is obtained.

The invention discloses a purification method of high-purity chromium for a target material, and belongs to the technical field of metal chromium purification, the purification method comprises the following steps: placing an original electroplated chromium sheet in a vacuum reduction furnace, vacuumizing the vacuum reduction furnace to 10Pa, filling 0-1atm of hydrogen, heating the vacuum furnace from room temperature to final temperature T DEG C according to a six-stage heating curve, keeping the temperature for 12-24 hours, and cooling to room temperature to obtain the high-purity chromium for the target material. And heating is stopped, hydrogen continues to be introduced into the vacuum reduction furnace, after the temperature in the vacuum reduction furnace is reduced to the room temperature, discharging is conducted, and the high-purity chromium is obtained. According to the purification method of the high-purity chromium for the target material, the high-purity chromium is prepared through purification of an original electroplated chromium sheet, the content of O in the chromium prepared through the purification method is smaller than or equal to 60 ppm, the content of N is smaller than or equal to 60 ppm, the content of C is smaller than or equal to 50 ppm, the content of S, Fe, Al and Si is smaller than or equal to 40 ppm, and the prepared high-purity chromium can be applied to the field of target materials.

The present invention belongs to the technical field of fine chemical industry, and discloses a dispersant for dispersing heavy element single substance and compound powder and a preparation method thereof, wherein the main function is to be used as a powder dispersant, especially suitable for dispersing heavy element powder that is easy to settle; bismuth powder, lead powder, tungsten powder, lead oxide, lead tetraoxide, bismuth oxide, tungsten oxide, lead tungstate, lead borate and other functional particles with shielding ability. The anionic dispersant containing multiple hydrophilic groups such as sulfonic acid group, ester group and hydroxyl group in the structural formula is used to disperse heavy element powder, which can neutralize the excess charge on the oxide surface and wrap the powder particles, and finally form a uniform and stable high-content heavy element powder latex system, creating conditions for preparing radiation-proof latex products.

Provided are a steel material and a method for producing the same. The steel material exhibits excellent hydrogen embrittlement resistance in a high-pressure hydrogen gas environment and is, therefore, suitable for use in hydrogen storage tanks, hydrogen line pipes, and the like. A steel material for a high-pressure hydrogen gas environment has a predetermined chemical composition. The steel material has a tensile strength of 560 MPa or higher, and a fracture toughness value KIH exhibited by the steel material in a high-pressure hydrogen gas atmosphere is 40 MPa ·m1 / 2 or higher.

The invention discloses a method for improving the elongation rate of a Q460C steel plate. The steel comprises the following chemical components in percentage by weight: 0.145-0.165% of C, 0.45-0.65% of Cr, 0.45-0.55% of Mo, 0.45-0.55% of S : 0.3 to 0.45%; mn: 1.4 to 1.55%; 0.015% to 0.025% of Nb; t accounts for 0.03%-0.05%; p is less than or equal to 0.013%; s < = 0.003%; the content of Ca is 0.0010 to 0.0025 percent; 0.021% to 0.036% of Al < s >; and the balance of iron and inevitable impurities. The production process comprises the steps of smelting, heating, rolling and controlled cooling. The steel plate is good in strength, plasticity and toughness, the yield strength of the steel plate ranges from 495 MPa to 503 MPa, the tensile strength ranges from 605 MPa to 619 MPa, the ductility ranges from 28% to 31.5%, and the impact energy at the temperature of 0 DEG C ranges from 169 J to 187 J.

A downy mildew resistant spinach plant having a downy mildew resistance RTM-1 gene which is located on chromosome 4 of a Spinacia tetrandra line CGN25466:MGK 01, the above downy mildew resistant spinach plant in which the RTM-1 gene is a gene that exists in a range from chr4_7962907 to chr4_8617232 on chromosome 4 of the Spinacia tetrandra line CGN25466:MGK 01, and either of the above downy mildew resistant spinach plants wherein the plant is resistant to at least the downy mildew races Pfs1, Pfs2, Pfs3, Pfs4, Pfs5, Pfs6, Pfs7, Pfs8, Pfs9, Pfs10, Pfs11, Pfs12, Pfs13, Pfs14, Pfs15, Pfs16, Pfs17, Pfs18 and Pfs19, and the race indicated by UA1014 strain.

The application discloses a kind of distributed edge collaborative video analysis methods based on multi-agent reinforcement learning, through mutual cooperation of edge nodes, jointly learn the optimal strategy of video frame pre-processing, model selection and request scheduling, to minimize the overall cost of system.The application models each edge node as an agent, which is an autonomous entity and makes distributed control decisions by observing its local state.The application uses an attention mechanism to distinguish the importance of information collected from different edge nodes, and its performance is verified by deploying a video analysis test platform with multiple edge nodes, and extensive experiments are conducted using real-world datasets and experimental settings.The experimental results show that compared with existing baseline methods, the application can significantly improve the overall reward by 33.6%-86.4%.

The invention provides a gas emergency command system based on GIS and low-delay streaming media communication. The gas emergency command system comprises a GIS application module, a low-delay streaming media communication module, a gas emergency field module, a gas emergency command center module, a monitoring playback center module, a gas emergency disposal whole process module, an emergency guarantee module, a statistical report module and an operation management module. According to the invention, GIS accurate positioning and visualization, low-delay streaming media communication real-time audio and video transmission and big data intelligent decision are integrated, and real-time emergency command of gas is realized.

Disclosed is an additive for a nonaqueous electrolyte solution, containing a first compound represented by Formula (1) and a second compound which is a carbonate compound, a cyclic sulfone compound, and / or a cyclic disulfonic acid ester compound. [In Formula (1), Q represents an alkenylene group having 4 to 8 carbon atoms, which forms a cyclic group together with a sulfur atom of a sulfonyl group, X represents a sulfonyl group, a carbonyl group, or a phosphoryl group, R1 represents an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkynyl group having 2 to 6 carbon atoms, an aryl group, an alkoxy group having 1 to 4 carbon atoms, an alkenyloxy group having 2 to 6 carbon atoms, an alkynyloxy group having 2 to 6 carbon atoms, or an aryloxy group, and n represents 1 or 2.]

This invention discloses a closed-loop soil improvement method for vineyards using organic fertilizer synergy, comprising the following steps: seasonal directional grass cultivation, preparation of Bacillus subtilis agent, preparation and application of self-made organic fertilizer in the early stage of vineyard establishment, and closed-loop synergistic improvement method; the closed-loop synergistic improvement method is divided into early stage improvement and late stage improvement, relying on grass return to the field and Bacillus subtilis to maintain soil fertility and nutrient cycle.