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100results about How to "The parameters are simple" patented technology

Automobile direction intelligent control method and control system based on driver model

The invention discloses an automobile direction intelligent control method based on a driver model. The method includes the steps of firstly, predicting a position where an automobile can reach after a moment T of a preview period according to the current running state of the automobile, comparing the position with a target position after the moment T, obtaining deviation of the two positions, obtaining the ratio of the deviation and T to serve as a predicted automobile transverse velocity, and then comparing the predicted automobile transverse velocity with an actual automobile transverse velocity to obtain a predicted automobile transverse velocity difference; secondly, obtaining a steering wheel turning angle through calculation, and controlling an automobile steering wheel according to the obtained steering wheel turning angle. The invention further discloses an automobile direction intelligent control system based on the drive model. The system comprises a preview module, a prediction module, a comparing module, a calculation module and a control module. Compared with the prior art, parameters of the driver model built in the method are directly obtained through parameters of the whole automobile, the driver module has the advantages of being simple in parameter and clear in physical meaning, and control of the automobile is more accurate and real.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Method for joint optimization of MLB and MRO in LTE network

The invention discloses a method for the joint optimization of MLB (Mobility Load Balancing) and MRO (Mobility Robustness Optimization) in an LTE (Long Term Evolution) network. The method comprises the followings steps: a load level is periodically detected by a cell s in the LTE network so as to judge whether the cell is overloaded; when the cell is overloaded, the load information of all neighboring cells is obtained by the cell s, the loads of the neighboring cells are respectively compared with an acceptance threshold, and whether the number n of the neighboring cells of which the loads are respectively lower than the acceptance threshold is 0 is judged, wherein n is an integer; the n neighboring cells are sequentially arranged from light load to heavy load when n is not equal to 0, the cell individual offsets (CIO) of the n neighboring cells relative to the cell s and the hysteresis parameters of the n neighboring cells are respectively obtained, and an array with a length n is established for storing the modified hysteresis parameter value of the cell s; and the CIOm of the arranged mth neighboring cell relative to the cell s is adjusted by the s, and the CIOs of the cell s relative to the mth neighboring cell is adjusted by the m. The method provided by the invention can increase a conversion success rate, balance the load of the network, increase the throughput of the network and improve the performance of the network.
Owner:HUAZHONG UNIV OF SCI & TECH

Method for defining degradation degree of high-cold steppe

The invention relates to a method for defining the degradation degree of a high-cold steppe. The method comprises the following steps of: (1) selecting a defining range; (2) determining various indexes of the degradation level of the high-cold steppe; (3) randomly selecting dozens of communities from the high-cold steppe and determining plant community dominant species in the high-cold steppe; (4) determining the coverage of graminaceous plants in each plant community dominant specie and initially classifying according to the indexes in the step (2); (5) determining the aboveground biomass relative scale of the plant community dominant species in each community and the aboveground biomass relative scale of edible grass and classifying once again according to the indexes in the step (2); (6) measuring the organic matter content distribution range of a surface soil sample of each community; and (7) comparing and verifying the organic matter content distribution range obtained in the step (6) with the organic matter content distribution range in the step (2) and finishing defining when the accuracy is over 90 percent. The method disclosed by the invention is simple, quick and accurate and ensures that the rehabilitation and protection of a degraded high-cold steppe are specific and scientific.
Owner:CHINA ACAD OF SCI NORTHWEST HIGHLAND BIOLOGY INST

Method and device for recovering residual carbon content in hydrocarbon source rocks

The invention discloses a method and a device for recovering residual carbon content in hydrocarbon source rocks. The method comprises the steps of calculating initial-period porosity and random-evolution-period porosity in hydrocarbon source rocks at different depths; calculating the initial-period density and random-evolution-period density in the hydrocarbon source rocks at different depths; calculating hydrocarbon discharging efficiencies in the hydrocarbon source rocks at different depths; calculating initial-period weight of organic parent materials in the hydrocarbon source rocks at different depths and the accumulated content of generated product components in conversion to a random evolution period; and recovering the residual carbon content in the hydrocarbon source rocks at different depths according to the porosities, densities, hydrogen discharging efficiencies, the initial weight of the organic parent materials in the hydrocarbon source rocks and the accumulated content of the generated product components. The method and the device improve accuracy and efficiency in recovering the residual carbon content in the hydrocarbon source rocks, thereby improving credibility and accuracy in using the residual organic carbon (TOC) content as an effective hydrocarbon source rock determination standard.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)

Fruit tree crown layer leaf and fruit three-dimensional reconstruction method and system

ActiveCN103824324ARealize 3D reconstructionConform to the morphological characteristics3D modellingFruit treePoint cloud
The invention provides a fruit tree crown layer leaf and fruit three-dimensional reconstruction method and system. The method includes the steps of extracting a three-dimensional branch framework of a fruit tree crown layer, judging whether each branch in the branch framework is connected with a sub-branch or not, enabling leaf cluster branches and fruit branches to grow on the branches connected with the sub-branches, constructing a leaf three-dimensional model and a fruit three-dimensional model, enabling leaves to grow on the branches in the three-dimensional branch framework according to the leaf three-dimensional model, and enabling fruits to be borne on the fruit branches according to the fruit three-dimensional model. The method is combined with a fruit tree branch framework extraction method of three-dimensional point cloud, and therefore rapid three-dimensional model reconstruction of the shape structure of a fruit tree crown layer with leaves and fruits is achieved; the number, the size and the direction of the leaves in the reconstructed crown layer model better conform to the shape characteristics of real fruit trees and meanwhile the model has high universality, and therefore the high-precision foundation model support is provided for application such as structure analysis of the fruit tree crown layer and the evaluation of physiological and ecological characteristics of the fruit tree crown layer.
Owner:BEIJING RES CENT FOR INFORMATION TECH & AGRI

Method for defining fast-growing plant scope

The invention relates to a method for defining a fast-growing plant scope, and aims to screen fast-growing, high-yield and high-carbon capturing efficiency plants for the preparation and storage of carbon storage profiles, papermaking, chemical raw materials, fertilizers, building materials, packaging materials, combustion power generation, replacement of fossil energy and the like to realize negative growth of global atmospheric greenhouse gases, adjust a greenhouse effect and control the formation of haze. The method comprises the following steps of (1) defining a selection range; (2) determining each physiological and growth index of fast-growing plants; (3) determining high-quality plants in a community; (4) determining the cover degree or the coverage rate of the plants, and classifying the plants according to the step (2); (5) determining the biomass of the high-quality plants, and classifying the plants again according to the step (2); (6) determining organic matters of a surface layer soil sample or the water quality standard of a water sample in the selected community, and performing comparison according to the step (2); (7) determining the propagation capability of the high-quality plants, and performing removal according to the step (2); and (8) finishing the definition when the accuracy is over 90 percent.
Owner:雷学军

Wind power plant model checking system and method based on trace sensitivity method

The invention relates to the technical field of a wind power plant model checking system and method based on a trace sensitivity method, in particular to the technical field applied in the wind power plant model checking. The system comprises a wind power plant and an external network equivalence system, wherein the external network equivalence system is connected with the wind power plant through a PCC (Program-Controlled Computer); the outlet voltage of a wind generating set in the wind power plant is 690 V; a wind driven generator is connected with a box-type transformer; the no-load voltage ratio of the box-type transformer is 690/35,000; the box-type transformer is connected with current collection circuits; the three current collection circuits are gathered in the PCC, and are accessed on the low-voltage side of a main transformer; and through boosting of the main transformer, electric energy is transmitted out through circuits. The system and the method can quickly and effectively check the modeling effectiveness of the wind power plant, and achieve the effect of checking the model accuracy while simplifying model parameters through combining the method research implemented by taking short-circuit faults as examples for instances. A novel checking method is brought for accurate modeling research to realize safe and stable operation of electric power systems.
Owner:LIAONING ELECTRIC POWER COMPANY LIMITED POWER SCI RES INSTION +2

Definition method of herbaceous plants for handling global climate changes

Provided is a definition method of herbaceous plants for handling global climate changes. The method is used for screening out the herbaceous plants which are high in carbon sequestration efficiency and have a high economic value, controlling stony desertification and desertification, reducing beach erosion and water and soil loss, increasing the total carbon storage amount and total biomass amount of an earth ecological system, developing new climate economy and achieving a zero-carbon development pattern. The method includes the steps of (1), determining a definition range and selecting theherbaceous plants suitable for development of agriculture, forestry, husbandry, by-products and fishery within the definition range; (2), determining each biological index of the herbaceous plants which are high in carbon sequestration efficiency and capable of governing stony desertification, desertification, beach erosion and water and soil loss; (3), randomly selecting 10 colonies and determining excellent plants in the colonies; (4), determining a coverage degree of the excellent plants in the colonies and conducting primary classification according to the indexes in step (2); (5), determining the biomass and propagation capability of the excellent plants in the selected colonies and conducting secondary classification according to the indexes in step (2); (6), completing definition when the accuracy rate is greater than 90%.
Owner:雷学军

Regulation and control method for preparation process for bio-oil starch adhesive for wood

The invention relates to a regulation and control method for a preparation process for a bio-oil starch adhesive for wood, and belongs to the technical field of adhesives. The regulation and control method comprises the following steps: adding ammonium persulphate in an emulsion obtained by mixing starch and hydrochloric acid to obtain an acid-hydrolyzed and oxidized starch emulsion; adding polyvinyl alcohol, adjusting the pH value by sodium hydroxide solution, adding grafting monomer acrylamide, and then adding ammonium persulphate to obtain a composite modified starch emulsion; adding bio-oil to obtain an initial bio-oil starch adhesive; and repeatedly adjusting the pH value by the sodium hydroxide solution and the bio-oil to obtain the bio-oil starch adhesive. The method is simple and convenient, accurate, moderate in reaction, simple in parameters, high in process stability, capable of reducing the gel problems and reaction insufficiency phenomena of the starch adhesive, guaranteeing a reaction sufficiency degree and improving the performances of the bio-oil starch adhesive, and suitable for industrial mass production; the prepared adhesive is excellent in performance, and capable of meeting the application requirements thereof in the field of wood.
Owner:BEIJING FORESTRY UNIVERSITY

Method for detecting foreign matter target of underground coal mine conveying belt, system, equipment and terminal

The invention belongs to the technical field of underground coal mine conveying belt detection, and discloses a method for detecting a foreign matter target of a underground coal mine conveying belt, system, equipment and a terminal, and the method comprises the steps: making a training sample and a test sample through an underground coal mine conveying belt monitoring video; intercepting and labeling foreign matters from the obtained video by using a Labelmg labeling tool, and carrying out adaptive histogram equalization on the conveyor belt image; under a YOLOv5 algorithm framework, introducing an attention model CBAM, simplifying network parameters by using depth separable convolution, optimizing a loss function, and constructing a detection model. According to the method, the foreign matters on the conveying belt can be detected under the conditions of coal dust interference, non-uniform illumination and high-speed movement of the conveying belt, so that higher detection precision is achieved, and the real-time requirement can be well met. Experimental results show that the accuracy and the recall rate of the foreign matter target detection algorithm for the underground coal mine conveying belt are the highest, and meanwhile the algorithm keeps good real-time performance.
Owner:XIAN UNIV OF SCI & TECH

Automatic parking control algorithm based on driving experience

The invention discloses an automatic parking control algorithm based on driving experience. A method draws on parking experience of skilled drivers and divides the parking process into six steps. Step1, a car is driven to a longitudinal starting position of parking, that is, a S0 segment; Step 2, the parking speed is controlled and a steering wheel is quickly turned to the end, that is, a S1 segment; Step 3, after the steering wheel being turned to the end, the vehicle speed is increased to the maximum parking speed, that is, a S2 segment; Step 4, when an direction angle of the car reaches acertain angle theta, the vehicle speed is reduced to the minimum stable speed, and the steering wheel is quickly turned to the end in the opposite direction, that is, a S3 segment; Step 5, the vehiclespeed is increased to the maximum parking speed after the steering wheel is turned to the end in the opposite direction, that is, a S4 segment; and Step 6, the steering wheel is quickly returned, that is, a S5 segment. The automatic parking control algorithm based on the driving experience is pure in geometric operation and small in calculation amount, the requirements on hardware equipment are low, the process is simple and easy to operate, high practicability is achieved, and commercialization is facilitated.
Owner:SOUTH CHINA UNIV OF TECH

Semi-active anti-roll structure and control method

The invention relates to the technical field of automobile part structures and control methods, in particular to a semi-active anti-roll structure and a control method. The stabilizer bar connecting rod comprises a piston cylinder body and a liquid storage cylinder communicated with the piston cylinder body through a cross rod, a boss is arranged on the inner wall of the liquid storage cylinder, a flow channel is formed between the boss and the bottom of the cylinder body of the liquid storage cylinder, a containing cavity communicated with the flow channel and the flow channel is formed between the boss and the bottom of the liquid storage cylinder, and a steel ball capable of rolling in the containing cavity is arranged in the containing cavity. Limiting ports for limiting entering of the steel balls are formed in the connecting positions of the two sides of the containing cavity and the channel and the flow channel, gaps for liquid to pass through are reserved between the limiting ports and the steel balls, a through hole for communicating the liquid storage cylinder with the containing cavity is formed in the boss, and the through hole is completely closed when the steel balls move to the end, facing the containing cavity, of the through hole. A set of combined structure of the circulation valve and the compensation valve is designed to control flowing of oil, the rigidity of the stabilizer bar connecting rod is adjusted, and side tipping of a vehicle body is effectively prevented.
Owner:DONGFENG MOTOR GRP

Remote sensing image surface feature classification method based on semantic segmentation

PendingCN112560577AWith soft saturationAlleviate the phenomenon of gradient dispersionScene recognitionNeural architecturesSample graphData set
The invention discloses a remote sensing image ground object classification method based on semantic segmentation, and the method comprises the following steps: S1, collecting a remote sensing image of a ground object through an unmanned plane, and constructing a remote sensing image set; S2, preprocessing the acquired remote sensing image set, constructing a sample image data set, and dividing the sample image data set into a training set and a verification set; S3, constructing a neural network semantic segmentation model; S4, inputting the training set into the neural network semantic segmentation model for training, and adjusting parameters in the training process by adopting a verification set to obtain a trained neural network semantic segmentation model; S5, inputting a to-be-identified remote sensing image into the trained neural network semantic segmentation model to obtain a ground object classification result, and realizing ground object classification of the remote sensingimage. The method solves the problems that an existing ground object classification model is large in parameter quantity, long in convergence time during training, poor in model generalization abilityand low in recognition accuracy.
Owner:空间信息产业发展股份有限公司
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