Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

32results about How to "Shorten the exploration time" patented technology

Formulating method for 5052 aluminum alloy strip cold rolling process

The invention relates to a formulating method for a 5052 aluminum alloy strip cold rolling process. The formulation method includes: according to the state of finished products, judging whether the cold rolling process includes a second intermediate annealing and a third rolling pass set or not; calculating the total reduction rate epsilon 1 from blanks to second intermediate annealing or the total reduction rate epsilon 2 from the blanks to the finished products; judging whether the cold rolling process includes first intermediate annealing and a second rolling pass set or not according to the state of the blanks and the total reduction rate epsilon 1 from the blanks to second intermediate annealing or the total reduction rate epsilon 2 from the blanks to the finished products; calculating thickness of the strips subjected to rolling passes and providing the cold rolling process of the 5052 aluminum alloy strips. With the formulating method, cold rolling sets included in the cold rolling process of the 5052 aluminum alloy strips, the number of the passes included in the cold rolling sets and the number of times of intermediate annealing can be determined, and the thickness of the strips during intermediate annealing and the reduction rate of each pass can be determined.
Owner:CHINA NON-FERROUS METALS PROCESSING TECH CO LTD

Preparation method for lead zinc niobate-lead titanate monocrystal

The invention relates to a preparation method for a lead zinc niobate-lead titanate monocrystal. The preparation method comprises the following steps of: mixing raw materials of PbO, ZnO, Nb2O5 and TiO2 according to chemical composition (1-x)Pb(Zn1/3Nb2/3)O3-xPbTiO3PZN-PT, wherein x is mole fraction of PT in a solid solution system and is 0-1; mixing the raw materials of ZnO, Nb2O5 and TiO2 in a stoichiometric ratio, and ball-milling and sintering to obtain ZnNb2O6 with a niobite structure and a small amount of zinc niobium titanium oxide with a rutile structure; mixing PbO and sintering to obtain PZN-PT ceramic powder with a perovskite structure; mixing the PZN-PT ceramic powder and a fluxing agent for the growth of the crystal; processing a seed crystal according to crystal orientation (111) and (011); and growing the monocrystal, namely raising the temperature to the saturated growth temperature and reducing the temperature at a speed of 0.5 to 2 DEG C per hour, wherein the pulling speed of the monocrystal is 0.1 to 0.5 mm/h and the rotating speed of the monocrystal is 10 to 25 rpm, when the temperature is reduced to be between 900 and 1,030 DEG C, the crystal is separated from a melt solution and the monocrystal is obtained by reducing the temperature to room temperature at a speed of 50 to 100 DEG C per hour. The monocrystal has large size, high uniformity and obvious crystal appearance and is easy for directional process. The crucible can be reused, and smelting cost is reduced.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Efficient graphene roll-to-roll continuous growth equipment and preparation method

The invention discloses efficient graphene roll-to-roll continuous growth equipment and a preparation method. The graphene roll-to-roll continuous growth equipment comprises a feeding cabin (3), a growth cabin and a receiving cabin (4), wherein the feeding cabin (3) is provided with more than two driven rollers (8), the receiving cabin (4) is provided with more than two driving rollers (9), an isolation support plate (11) is arranged in the growth cabin, the isolation support plate (11) divides the growth cabin into more than two growth chambers, the growth cabin comprises a graphene growth area, and the graphene growth area is provided with a heating device. The graphene preparation method provided by the invention comprises a step of simultaneously placing a plurality of metal substrateson a plurality of driven rollers (8) and a driving roller (9), and a step of setting the driving roller to be the same or different. The equipment and the method disclosed by the invention have the advantages of high quality, good consistency, no size limitation and the like of graphene prepared by the existing equipment, the production efficiency of graphene is further improved, and the energy consumption for preparing graphene per unit area is reduced.
Owner:GRAHOPE NEW MATERIALS TECH INC

Robot navigation method based on Bayesian optimization multi-information gain exploration strategy

The invention discloses a robot navigation model based on a Bayesian optimization multi-information gain exploration strategy, and belongs to the field of mobile robots and the field of artificial intelligence. The method is realized based on ROS programming, and a simulation robot with a speedometer, an RGB-D camera and other sensors is set. The method comprises the following steps of: firstly, comprehensively measuring and extracting in a mode of fusing leading edge point clustering and a passable area on a candidate point extraction method; on the basis of a candidate point evaluation method, improved Bayesian optimization is used for calculating multiple information gains, map entropy and distance cost are comprehensively considered, then the optimal candidate point is selected, and the robot is prevented from continuously walking along repeated paths in the environment. According to the method, simulation experiment verification is carried out by using gazebo in an ROS operating system, a two-dimensional grid map and an octree map are constructed by using RGB-D information, and a mobile robot can rapidly and effectively explore an unknown environment by using a small number of steps to complete a mapping task with high quality.
Owner:BEIJING UNIV OF TECH

Jump point search path planning method in dynamic scene

The invention aims to solve the problems of low algorithm efficiency, local optimal path and the like in a search-based path-finding algorithm in a rapidly changing dynamic complex scene. On the basis of a jump point search (JPS) algorithm, a dynamic jump point search (DJPS) path planning method in a dynamic scene is provided, and on the basis of the JPS algorithm, the dynamic jump point search (DJPS) path planning method in the dynamic scene is provided. The DJPS algorithm is used for coping with obstacle changes in different scenes, a set of complete'jump point-path updating scheme 'is designed, meanwhile, a new'near path' possibly occurring during obstacle updating is explored, and the obtained path is optimized to ensure the optimality of the path. In order to verify the effectiveness of the DJPS algorithm, path updating experiments under various complex maps are designed. According to the method, obstacle detection is only performed on the original path and the nodes near the path, and the search length during path finding each time is limited by utilizing jump points stored in OpenList and CloseList in the original algorithm and'abandoned paths' which are obtained by mutual connection and do not finish path finding, so that the time complexity and the space complexity of the algorithm are reduced, and the path finding efficiency is improved. And a jump point searching scheme in a dynamic scene is realized.
Owner:HARBIN UNIV OF SCI & TECH

Preparation method for lead zinc niobate-lead titanate monocrystal

The invention relates to a preparation method for a lead zinc niobate-lead titanate monocrystal. The preparation method comprises the following steps of: mixing raw materials of PbO, ZnO, Nb2O5 and TiO2 according to chemical composition (1-x)Pb(Zn1 / 3Nb2 / 3)O3-xPbTiO3PZN-PT, wherein x is mole fraction of PT in a solid solution system and is 0-1; mixing the raw materials of ZnO, Nb2O5 and TiO2 in a stoichiometric ratio, and ball-milling and sintering to obtain ZnNb2O6 with a niobite structure and a small amount of zinc niobium titanium oxide with a rutile structure; mixing PbO and sintering to obtain PZN-PT ceramic powder with a perovskite structure; mixing the PZN-PT ceramic powder and a fluxing agent for the growth of the crystal; processing a seed crystal according to crystal orientation (111) and (011); and growing the monocrystal, namely raising the temperature to the saturated growth temperature and reducing the temperature at a speed of 0.5 to 2 DEG C per hour, wherein the pulling speed of the monocrystal is 0.1 to 0.5 mm / h and the rotating speed of the monocrystal is 10 to 25 rpm, when the temperature is reduced to be between 900 and 1,030 DEG C, the crystal is separated from a melt solution and the monocrystal is obtained by reducing the temperature to room temperature at a speed of 50 to 100 DEG C per hour. The monocrystal has large size, high uniformity and obvious crystal appearance and is easy for directional process. The crucible can be reused, and smelting cost is reduced.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Labyrinth navigation method and device based on multi-agent layered reinforcement learning

ActiveCN113218399ASolve the problem of long exploration timeReduce the impactNavigational calculation instrumentsMachine learningSimulationExploration - action
The invention discloses a labyrinth navigation method and device based on multi-agent layered reinforcement learning, and the method comprises the steps: enabling each agent to execute an exploration action through a layered structure, judging whether there is an obstacle around the agent, executing an obstacle avoidance action if there is an obstacle, and enabling the agents to gradually reduce the selection action of the layered structure; the agent executes actions in the current labyrinth environment state, collects empirical data, updates an environment model according to the empirical data, judges whether the agent reaches a target point or collides with an obstacle or not, if yes, the agent begins to explore from the initial position again, and if not, the agent continues to explore in the labyrinth environment; the agents are trained by using the empirical data and the environmental model, and each agent bypasses an obstacle in the labyrinth environment and reaches a respective specified target point in a shortest path. The device comprises a processor and a memory. According to the method, the agents are enabled to find the target point more quickly, the number of interaction times is reduced, and the environment non-static problem caused by discordance between the agents is solved.
Owner:TIANJIN UNIV

Method for formulating cold rolling process of 5052 aluminum alloy plate and strip

The invention relates to a method for formulating the cold rolling process of 5052 aluminum alloy plate and strip. According to the state of the finished product, it is judged whether the cold rolling process includes the second intermediate annealing and the third rolling pass group; and the total reduction from the billet to the second intermediate annealing is calculated. Rate ε 1 Or the total reduction ratio from blank to finished product ε 2 ;According to the state of the billet and the total reduction ε from the billet to the second intermediate annealing 1 Or the total reduction ratio from blank to finished product ε 2 , to determine whether the cold rolling process includes the first intermediate annealing and the second rolling pass group; calculate the thickness of the plate and strip after rolling each pass, and provide the cold rolling process of the 5052 aluminum alloy plate and strip. It can be determined that the cold rolling process of 5052 aluminum alloy plate and strip includes several groups of cold rolling, how many passes are included in each group of cold rolling, including several intermediate annealings, and the thickness of the plate and strip during intermediate annealing and the number of passes per pass can be determined. Secondary reduction rate.
Owner:CHINA NON-FERROUS METALS PROCESSING TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products