319results about How to "Effective coverage" patented technology

The invention discloses a multi-unmanned aerial vehicle maritime search and rescue path planning method based on multi-target particle swarm optimization. The method comprises the steps that S1, an area to be searched and rescued is converted into a two-dimensional search and rescue area; s2, performing grid decomposition on the two-dimensional search and rescue area; s3, obtaining a probability map through a Gaussian mixture model; s4, establishing an unmanned aerial vehicle search and rescue multi-target collaborative optimization function; s5, solving the function based on a hybrid particle swarm optimization algorithm to obtain an optimal solution; and generating a specific search and rescue path of the unmanned aerial vehicle according to the solved optimal solution. According to the method, an unmanned aerial vehicle search and rescue multi-target collaborative optimization function is established, the unmanned aerial vehicle is guided to execute the search and rescue task by taking resource balanced allocation, maximum path safety, preferential coverage of a high-risk area and minimum energy consumption as targets, task allocation, path planning and energy management are improved, multi-target optimization of multi-unmanned aerial vehicle search and rescue path planning is realized, and the search and rescue efficiency is improved. An accurate flight path is formulated for each unmanned aerial vehicle, comprehensive coverage of search and rescue tasks is ensured, and the search and rescue efficiency and success rate are remarkably improved.

The embodiment of the invention discloses a multi-nest remote take-off and landing unmanned aerial vehicle autonomous inspection method and system, and belongs to the technical field of unmanned aerial vehicles. According to the embodiment of the invention, the target inspection space area is identified, and the related vector and information are acquired, so that the inspection task planning can accurately meet the actual demand. A multi-nest distribution relation vector is input into a multi-agent depth deterministic strategy gradient algorithm, unmanned aerial vehicle path planning spatio-temporal data are discriminated and analyzed by means of a cooperative competition discrimination branch, complex relations such as nest layout and unmanned aerial vehicle paths can be fully considered, and resource allocation is optimized. According to the task indication information, a state vector is generated and a scheduling viewpoint is optimized, and then an autonomous cooperative inspection strategy is generated, so that the cooperative inspection efficiency of multiple unmanned aerial vehicles can be greatly improved, task conflicts are avoided, accurate matching of inspection task paths and task requirements is ensured, and a target area is effectively covered. The labor cost is reduced; and the accuracy and timeliness of routing inspection are improved.

The invention relates to a collaborative autonomous perception and navigation method in a denial environment, which comprises the following steps: constructing a self-organizing robust communication system to realize dynamic networking and data sharing among multiple unmanned aerial vehicles in the denial environment, and adopting a self-adaptive network protocol to realize automatic configuration of a communication network under network topology change or communication interference; based on a multi-sensor fusion sensing system, environment information and motion information of the unmanned aerial vehicle are processed through a data fusion algorithm; a single unmanned aerial vehicle constructs a reward function based on unmanned aerial vehicle energy consumption, an exploration area, a path overlapping degree and a path danger degree, executes autonomous perception and exploration in an unknown environment and completes mapping; the distributed multiple unmanned aerial vehicles carry out individual communication and game playing in the unmanned aerial vehicle cluster according to map information, respective positions and working states, task distribution is achieved, and path planning and action decision making are completed. According to the invention, autonomy and collaboration of the unmanned aerial vehicle in a denial environment are improved, and an effective solution is provided for navigation in a complex environment.

The invention discloses a thin mutual coal seam fracturing, gasification and carbon sequestration integrated method. The method comprises the steps of geological exploration and coal seam refined evaluation; a middle horizontal well is drilled downwards from the ground; top and bottom horizontal wells are planned and drilled in the uppermost and lower sandstone stratums of the thin mutual coal seam; a plurality of top and bottom fishbone wells are drilled obliquely downwards and upwards in the top and bottom horizontal wells; oxygen-enriched water vapor is injected into the middle horizontal well through a continuous oil pipe, the oxygen-enriched water vapor is squeezed into the reservoir under the action of high pressure, and fracturing operation is conducted; initiating an underground gasification process of the coal seam, and synchronously performing extraction operation of the coal seam gas; supercritical CO2 fracturing operation is conducted on the top horizontal well and the bottom horizontal well; injecting water-based fracturing fluid into the top horizontal well and the bottom horizontal well; gasified materials generated by coal seam combustion gasification and desorbed methane gas are extracted through the middle horizontal well, and supercritical carbon dioxide injected before is sealed for a long time. According to the method, the limitation of a traditional hydraulic fracturing technology can be solved, and the transformation effect of the reservoir can be improved.

The invention relates to the technical field of mining data processing, and particularly discloses a coal seam layered fully mechanized caving mining water flowing fractured zone height prediction method, which is used for solving the problem that a traditional material point method is difficult to accurately capture a fracture extension path and height, and the method comprises the following steps: monitoring a P-wave and S-wave arrival time difference of a micro-seismic event in real time through a micro-seismic sensor array; a micro-seismic event processing host is used for calculating a three-dimensional expansion path and an accumulative effect of a fracture based on the first equation set, the second equation set and the third equation set in combination with a stress intensity factor and a fracture expansion speed formula, and finally the final height of a fractured zone is accurately predicted by using a fractured zone height prediction formula and integrating rock stratum physical attributes and stress data. Transmitting to anchor rod adjusting equipment for supporting optimization; according to the method, the fracture extension path, the speed and the cumulative effect are calculated, and the physical attribute and the stress environment of the rock stratum are combined, so that the height prediction precision of the fracture zone is remarkably improved, and the safety and the real-time monitoring effectiveness in the coal mining process are ensured.

The invention discloses a communication and interference integrated base station method and system for a low-altitude safety problem of an unmanned aerial vehicle, and relates to the field of communication, the field of unmanned aerial vehicles and the field of safety supervision, in particular to a method and system for realizing low-altitude wireless signal coverage, including communication signals and interference signals, by using a wireless communication network base station so as to realize low-altitude safety management of the unmanned aerial vehicle. A low-altitude, slow and small unmanned aerial vehicle becomes a main user of a low-altitude airspace in China, but the safety supervision of the flight of the unmanned aerial vehicle in the low-altitude airspace is difficult to realize. According to the method, the interference signal generator function is integrated into the base station (the communication-interference integrated base station), effective coverage of communication / interference signals in the forbidden and limited area can be economically realized through wide deployment of a base station network system, and obvious electromagnetic signal characteristics are given to the forbidden and limited area, so that intrusion of an illegal flying unmanned aerial vehicle is effectively prevented; and meanwhile, management and control of the legal flight networked unmanned aerial vehicle are realized through networking communication, and a technical means of electronic management of low-altitude flight of the unmanned aerial vehicle is provided.

The invention belongs to the field of biological medicines, and particularly relates to an optimized antigen peptide aiming at L858R point mutation of an EGFR exon 21 region and application of the optimized antigen peptide. Compared with a mutant peptide, the optimized antigen peptide has stronger immune cross reaction, can improve the immunoreactivity or curative effect of related tumor vaccines, and can effectively cover more patient crowds.

The invention discloses a building construction dust fall enclosure which comprises an enclosure water tank, connecting frames are fixedly mounted on the two sides of the enclosure water tank, atomization dust fall mechanisms are rotationally mounted between the two connecting frames and in the connecting frames, and a splicing mechanism is fixedly mounted at one ends of the two connecting frames; the wall water tank can be buckled on the outer surface of the splicing mechanism of another wall water tank through the splicing mechanism, so that splicing of the multiple wall water tanks is achieved, back plates are installed at one ends of the wall water tanks in a communicating mode, installation grooves are formed between the back plates in a sealed mode, and reciprocating push-pull mechanisms are fixedly installed in the installation grooves. The push-pull end of the reciprocating push-pull mechanism is rotationally connected to one end of the atomization dust falling mechanism. Through the design of the atomization dust falling mechanism and the reciprocating push-pull mechanism, dust falling dead angles caused by single-direction spraying can be effectively avoided through up-and-down and left-and-right swinging water mist spraying operation, and dust on a construction site is more thoroughly inhibited.

The invention discloses a method for manufacturing a circuit board of a thick copper slope circuit, which comprises the following steps of: attaching a first dry film layer on a thick copper layer, manufacturing a dry film pattern, retaining the dry film layer on the thick copper circuit, developing and removing the dry film layer on a thin copper circuit, developing the dry film layer on the slope circuit to form a matrix developing pattern, etching a slope circuit area to form a matrix etching pattern, and manufacturing the circuit board of the thick copper slope circuit. The method comprises the following steps of: grinding off a thick copper slope line, processing a line pattern, manufacturing a second dry film pattern, forming a surrounding pattern of all slope line areas, manufacturing a first solder mask layer in the surrounding pattern, manufacturing a second solder mask layer in other areas, and carrying out post-process processing to form a circuit board of the thick copper slope line; the processing precision and reliability of a slope circuit are improved through a mode of taking chemical processing of developing and etching as a main mode and taking polishing as an auxiliary mode, and a solder mask layer with the thickness reaching the standard and a complete covering effect is formed through manufacturing an encircling pattern and manufacturing a first solder mask layer and a second solder mask layer; the whole machining process effectively improves the machining precision and reliability.

The embodiment of the invention discloses a control method and device of automatic cleaning equipment and related equipment, the automatic cleaning equipment comprises an equipment body and a mechanical arm arranged on the equipment body, the equipment body is provided with a first sensor, and the mechanical arm is provided with a second sensor. The mechanical arm is controlled to extend out of the equipment body, the automatic cleaning equipment is controlled to move in the working environment, and visual information is collected through a first sensor and a second sensor in the moving process; in response to the high-altitude area identified according to the visual information collected by the second sensor, the automatic cleaning equipment is controlled to move to the position below the high-altitude area; the mechanical arm is controlled to enter a high-position scanning posture, and visual information of a high-altitude area is collected through a second sensor; and the visual information collected by the first sensor and the second sensor in the mapping mode is fused to establish a map of the working environment, so that the navigation capability and the obstacle avoidance capability of the automatic cleaning equipment are improved.

The utility model discloses an automobile rear frame mold, and belongs to the technical field of automobile rear frame molds. The automobile rear frame mold comprises a bottom plate, a guide rail is fixedly connected to the upper surface of the bottom plate, a lower pressing block is slidably connected to the outer wall of the guide rail, a containing table is fixedly connected to the upper surface of the bottom plate, a servo motor is arranged in the bottom plate, and the output end of the servo motor is fixedly connected with a gear; according to the device, a sliding block is pulled to move when a rotating plate rotates, the sliding block is supported by a first supporting rod and a second supporting rod, so that when a positioning plate clamps the four edges of a material plate, the four edges of the material plate are more attached, the material plate is effectively prevented from moving in the stamping process, a lower pressing block enables a limiting block to enter a groove in the descending process, and the material plate is prevented from moving. Accurate alignment of the lower pressing block during stamping can be ensured, so that deviation and shaking of the lower pressing block caused by deformation of a material plate are reduced, and the positioning precision is further improved.

The invention discloses a cylindrical forge piece machining device which comprises two supporting arms connected with a manipulator and a rotary supporting column, the two supporting arms are horizontally arranged in parallel, the rotary supporting column is horizontally arranged between the two supporting arms, a first cleaning mechanism is arranged on the supporting arms, and the first cleaning mechanism comprises an arc-shaped box body and a rotating part; the inner arc wall of the arc-shaped box body faces the side wall of the rotary supporting column, a plurality of nozzles are evenly distributed on the inner arc wall, a first connector used for being connected with a high-pressure airflow conveying pipe is arranged at the bottom of the arc-shaped box body, and the rotating part comprises a connecting frame, two arc-shaped guide rails, a first rack, a reset spring and a gear transmission assembly. According to the device, the function of automatically cleaning oxide skin generated in the forging forming process of the cylindrical forge piece can be achieved through the arranged first cleaning mechanism, the first cleaning mechanism is achieved through the arc-shaped box body and the rotating part, rotating blowing operation can be achieved, the surface area of the cylindrical forge piece is effectively covered, and the cleaning effect is improved.

The invention discloses an intelligent file cabinet file query method based on the RFID technology, and relates to the technical field of intelligent file management.The internal space of a file cabinet is divided into small grid units through virtual grid modeling, each grid has a clear number, preliminary positioning of each RFID tag is achieved, and the file query efficiency is improved. According to the method, the file is not limited to an approximate area any more and is accurate to a specific grid, multi-antenna cooperative reading is combined with multiple reading and analysis of signal intensity and phase angles, the positioning accuracy is further improved, errors can be corrected according to signal differences and phase angles through a maximum likelihood estimation model, more accurate file position query is achieved, and the positioning accuracy is improved. According to the technical scheme, labels in a coverage area are read for multiple times in a multi-antenna cooperative reading mode, interference is reduced through signal calibration between the antennas, and errors caused by signal reflection, interference or overlapping are reduced by carrying out weighted average on signal strength and correcting differences between the antennas through a least square method.

The invention provides an airborne radome laser paint removal path planning method and system, and relates to the technical field of laser processing and artificial intelligence control, and the airborne radome laser paint removal path planning method comprises the steps: obtaining a binary feature image of a target workpiece to be subjected to paint removal; performing connected domain extraction on the binarized feature image to obtain a plurality of connected domains, and performing merging processing on all the connected domains to obtain a plurality of merged partitions; performing path planning on each merged partition to obtain corresponding path planning data; and performing global planning on the merged partitions according to the path planning data of each merged partition to obtain a global composite path planning result. According to the method, the complexity of path planning is reduced by combining the connected domains, effective scanning path planning only aiming at an expected paint removal area is realized in a regular graph range, and on the basis, the optimal access sequence of multiple global combined partitions is calculated by utilizing global planning, so that the laser can cover each combined partition; and the clearing efficiency and precision are improved.

The present invention relates to the technical field of plastic drain board processing, and specifically to a plastic drain board processing melting device, comprising a frame; an extrusion assembly, which is arranged on one side of the top end of the frame, and the extrusion assembly is used to extrude plastic raw materials; a hot melt assembly, which is arranged on the outer surface of the extrusion tube, and the hot melt assembly is used to heat the extrusion assembly; a suction assembly, which is arranged at the top end of the heating cavity, and the suction assembly is used to absorb excess heat in the hot melt assembly or clean up dust in the hot melt assembly. Compared with the prior art, the present application provides an air inlet cavity in the hot melt assembly, and the design of the vertical plate, the first guide plate, the second guide plate and the third guide plate inside the air inlet cavity helps to guide the air to flow along a specific path, helps to ensure that the plastic raw materials are evenly heated during the extrusion process, and this uniform heating effect helps to improve the extrusion efficiency and ensure the smoothness and uniformity of the surface of the molded product.

The invention relates to the technical field of cutting machine protection, and discloses a linear cutting machine tool with a liftable waterproof cover, which comprises a machine tool body, the outer side of the machine tool body is sleeved with a peripheral cover, the top of the machine tool body is provided with a mounting baffle, the mounting baffle is sleeved with a waterproof cover body, and the top of the machine tool body is provided with a workpiece mounting seat. A lifting assembly is arranged on one side of the waterproof cover body. A cleaning assembly is arranged on one side of the top of the machine tool body. The lifting assembly is used for controlling the height of the waterproof cover body. And the cleaning assembly is used for cleaning sediments at the bottom of the mounting baffle. Compared with the prior art, the lifting assembly can adjust the height of the waterproof cover body according to needs, it is ensured that the waterproof cover body is always kept at the proper position in the machining process, good protection is provided, and the cleaning assembly is located on one side of the top of the machine tool body and specially used for cleaning sediments at the bottom of the mounting baffle and keeping clean; and normal operation of equipment is ensured.

The invention provides a structural analysis method and device for a physical examination report, electronic equipment and a storage medium. The method comprises the steps of determining a textbox position and text content in the physical examination report; determining target classification information corresponding to the key information in the physical examination report according to the textbox position and the text content; and generating a structured analysis result of the physical examination report according to the textbox position, the text content and the target classification information. According to the method and the device, the structured analysis mode is more flexible, the physical examination reports of complex and changeable styles can be effectively covered, and the structured analysis effect of the physical examination reports is improved.

The invention provides a game anti-addiction face age evaluation method and device, and relates to the technical field of artificial intelligence, and the method comprises the steps: in response to a verification request of a game application, collecting a face image of a user through an image collection device of terminal equipment; inputting the face image into a lightweight age evaluation model deployed in the terminal device for reasoning, executing living body detection and age evaluation, and determining a living body detection result and age evaluation data; wherein the lightweight age evaluation model is constructed based on a lightweight convolutional neural network, and an age sensitive feature attention module is configured in the model and is used for dynamically improving an endowed weight for an age-related feature region in the face image; the living body detection process and the age evaluation process are carried out cooperatively; and generating a control instruction for the game application according to the living body detection result and the age evaluation data in combination with a preset local anti-addiction rule base.

The invention discloses a regional target and environment dynamic sensing method for construction site video monitoring, and the method comprises the steps: carrying out the initial deployment of distributed cameras for a construction site, and carrying out the deployment optimization; collecting video data based on Kafka Broker cluster multithreading, collecting environmental parameters, and performing fusion based on Mahalanobis distance to obtain fused environmental parameters; performing multi-target detection on the collected video data, and analyzing behavior characteristics of the collected video data to obtain video target data; environment parameter feature representation is extracted from the fused environment parameters, multi-modal dynamic fusion is carried out on the environment parameter feature representation and video target data based on learnable parameters, and a comprehensive situation is analyzed through a situation awareness model to obtain real-time comprehensive situation data; and performing real-time risk assessment on personnel behaviors and environmental conditions in the construction site by adopting Bayesian network analysis based on the real-time comprehensive situation data, identifying risk events, and automatically generating alarm information. According to the invention, the intelligent level of construction site video monitoring is obviously improved.

The utility model discloses a side-standing folding type oil storage tank mud removal reduction treatment device and a control system thereof, and the device comprises a base which is installed at the side edge of the bottom in an oil storage tank; the rotating seat is rotationally mounted above the base; the lifting rod is arranged on one side of the rotating seat and is provided with a sliding seat capable of moving up and down; the inner ends of the first hinge arm and the first hinge rod are respectively hinged with the rotating seat and / or the lifting rod, and a first linkage plate is hinged between the outer ends of the first hinge arm and the first hinge rod; the inner end of the pull rod is hinged to the first linkage plate; the inner ends of the second hinge arm and the second hinge rod are respectively hinged with the outer end of the pull rod and the first linkage plate, and a second linkage plate is hinged between the outer ends of the second hinge arm and the second hinge rod; one end of the linkage rod is hinged to the sliding seat, and the other end of the linkage rod is hinged to the first hinge arm or the first hinge rod; the first hinge arm is hinged to the second hinge arm; and the suction nozzle and the impact nozzle are arranged on the second linkage plate. Compared with the prior art, the side-standing folding type mud removal device has the advantages that the side-standing folding type structure is arranged on one side of the bottom of the oil storage tank, and the bottom range of the whole oil storage tank can be covered through rotation and folding so that timely, effective and efficient mud removal operation can be carried out.

The invention discloses a movable guide mechanism of a dyeing soaking pool, which comprises the dyeing soaking pool and further comprises a guide assembly, movable guide rollers are arranged on the left side and the right side in the dyeing soaking pool, the guide assembly comprises a fixed frame, and the fixed frame is fixedly connected to the middle of the top in the dyeing soaking pool. Auxiliary guide rollers are arranged on the left and right sides in the fixing frame, a fixing transverse plate is fixedly connected to the middle of the top in the fixing frame, and fixing guide boxes are fixedly connected to the front and rear sides of the bottom of the fixing transverse plate. According to the device, the top of the fabric is expanded by arranging the movable guide rollers, so that gaps among fibers of the fabric can be enlarged, dye is easier to be in full contact with the fabric during soaking, the efficiency is higher when the fabric is soaked and dyed, the fabric can be more fully exposed in the dye by expanding the fabric, and the fabric can be better dyed. The dye can more uniformly permeate into each part of the fabric, so that the phenomenon of non-uniform dyeing is reduced, and a more consistent and attractive dyeing effect can be obtained.

The invention relates to the technical field of aircrafts, in particular to an electrified cleaning method and device for a high-voltage transmission line, and is used for cleaning the high-voltage transmission line. The method comprises the steps of determining an optimal receiving angle range of a cable through laboratory analogue simulation, obtaining wind speed and wind direction data above and below the cable in real time, establishing a simulation model to simulate changes of working parameters of an unmanned aerial vehicle under different wind speeds and wind directions, and outputting the working parameters of the unmanned aerial vehicle in the optimal receiving angle range to execute cleaning operation. And the cleaned cable is subjected to drying treatment. According to the method, double-machine collaborative operation is adopted, cleaning of the two sides of the cable can be completed through one-time flight, and the cleaning efficiency is greatly improved. Meanwhile, through analogue simulation and real-time data adjustment, effective coverage of the cleaning agent is ensured, generation of condensation or ice crystal effect is reduced, and cleaning quality and safety are improved. The method has remarkable technical advantages and application prospects, and a new solution is provided for electrified cleaning of power equipment.

The utility model discloses a road bridge deicing device which comprises a moving frame, the moving frame is connected to external moving equipment, an adjusting mechanism is arranged on the moving frame, and the adjusting mechanism comprises a fixing pipe, an external connecting pipe, a corrugated pipe, an air blowing mechanism, a fixing ring, an elastic piece, a flow deflector, a telescopic disc, a bidirectional lead screw and a rotating mechanism. The air blowing mechanism is connected to the fixed pipe and the movable frame in a matched mode, the external pipe is connected to an external air inlet mechanism, the corrugated pipe is connected to the external pipe and the fixed pipe, the multiple elastic pieces are arranged, when the telescopic discs get close, the elastic pieces get close to each other, the flowing resistance is increased, and therefore the flowing speed of hot air is reduced, and the air blowing effect is improved. According to the design, by adjusting the distance between the elastic pieces, the flow speed of hot air can be adjusted, and the adaptability and practicability of the deicing device are improved.

The invention relates to the technical field of metal machining, and discloses cold-rolled aluminum plate winding and cleaning equipment which comprises a machine body used for supporting and installing all functional parts of the equipment. The power box is arranged on the machine body; and the winding roller is arranged at the output end of the power box and used for achieving winding and tidy collection of the cold-rolled aluminum plates. According to the cold-rolled aluminum plate winding and cleaning equipment, the contact pressure applied by the cleaning roller can be evenly distributed through the cleaning mechanism and the bent conveying structure, surface pollutant residues caused by uneven cleaning force are effectively prevented, the cleaning roller can make contact with the surface of an aluminum plate from multiple angles through Z-shaped bent conveying, the cleaning comprehensiveness and depth are enhanced, and the cleaning efficiency is improved. The pressure applied by the cleaning roller is dispersed through bent transmission, so that the acting force is more uniform, the scratch risk of the surface of the aluminum plate or damage caused by overlarge local pressure is reduced, and pollutants on the surface of the aluminum plate are better removed through the design.

The utility model discloses an air outlet adjusting structure of a data center cold channel, and relates to the technical field of data centers. The ventilation device comprises a mounting plate, wherein the top of the mounting plate is fixedly connected with a ventilation pipeline; a ventilation assembly is arranged in the ventilation pipeline, the ventilation assembly comprises turbulent flow slowing plates, the turbulent flow slowing plates are fixed to the top and the bottom of an inner cavity of the ventilation pipeline, a motor is fixedly connected to one side of the top of the ventilation pipeline, and a control piece is arranged at the output end of the motor; an adjusting assembly is arranged on one side in the ventilation pipeline, and the air outlet direction can be controlled through the adjusting assembly. The transmission rod can be driven to rotate through work of the motor, then the baffle is driven to transmit, the purpose of controlling the air velocity is achieved, the sliding plate can be driven to move through pushing of the air cylinder, then the connecting plate is driven to move, the adjusting plate is driven to rotate, and cold air can be evenly blown to a server in cooperation with the turbulent flow slowing-down plate.

The invention discloses a straw deep burying and returning method and device, and relates to the technical field of straw returning device.According to the technical scheme, the straw deep burying and returning device comprises a device body, a crushing cavity is fixedly connected to the upper portion of the device body, a crushing mechanism is arranged in the crushing cavity, a filter plate is arranged on the lower portion of the crushing mechanism, and two vibration assemblies are fixedly connected to the bottom of the filter plate; a material box is arranged at the front end of the filter plate, three material guide pipes are fixedly connected to the front end of the material box, and the sides, far away from the material box, of the three material guide pipes are fixedly connected to the lower portions of the soil breaking coulters, and the three soil breaking coulters can be driven to move up and down through the adjusting mechanism before the device is used, so that the soil breaking depth of the soil breaking coulters is flexibly adjusted according to the soil quality of the land; fluency of the device during soil breaking and ditching is effectively guaranteed, after ditching is completed and straw is put in, soil covering wheels arranged at the rear ends of soil breaking coulters can push soil accumulated on the two sides of a soil ditch to enter the soil ditch, and therefore the straw is covered.

The invention discloses a casting process for producing a bimetal hydraulic rotor by a continuous furnace, which comprises the following steps of: cleaning casting surfaces of a steel substrate and a copper block, and placing the copper block in a copper liquid melting pool at the top of the steel substrate; covering the steel matrix solution copper pool with a heat preservation cover body made of a heat preservation material, then feeding the steel matrix solution copper pool into a continuous furnace, and performing heating, heat preservation and cooling along with the furnace according to a set casting temperature T and a set moving speed r to obtain the copper-steel bimetal rotor; wherein the heating, heat preservation and cooling processes are carried out under the protective atmosphere, in the heating process, heat is transferred to the copper block through the steel base body, and the copper block is melted; in the cooling process, under the heat preservation effect of the heat preservation cover body, heat of molten copper is transferred through the steel base body for cooling, and the solidification direction is from bottom to top; according to the method, the copper liquid is solidified in a sequential solidification mode, so that excellent metallurgical bonding at the bimetal composite interface is guaranteed, and the bonding strength is improved.

The invention relates to the technical field of heat transfer science and fluid mechanics, in particular to a novel spiral ribbed fuel element heat transfer enhancement method, a fuel element and an assembly. The enhanced heat exchange method comprises the steps that anticlockwise spiral fins and clockwise spiral fins are sequentially arranged on a fuel element body, and the anticlockwise spiral fins and the clockwise spiral fins are arranged in a twisted mode, so that the whole fuel element is covered with the inlet effect, and the heat exchange efficiency is improved; the adjacent fuel element bodies are arranged at intervals according to the rule that the initial spiral directions of the special-shaped fins are different, coolant stirring and mixing between the sub-channels are enhanced, it is ensured that the surface temperature of the fuel element bodies is evenly distributed, the overall heat exchange efficiency of the fuel assembly is improved, and the heat exchange enhancing effect is achieved. The heat exchange area of the fuel element can be increased through different numbers of special-shaped fins and different sizes of sectional areas.

The utility model relates to the technical field of antennas, in particular to a multiband matrix directional antenna and a directional antenna system.The multiband matrix directional antenna comprises an antenna body, the antenna body comprises four reflecting plates, and the four reflecting plates enclose to form a cubic structure. A directional antenna unit is arranged on the outer wall of each reflecting plate; the four directional antenna units are arranged according to a 2 * 2 matrix, and each directional antenna unit comprises an antenna array composed of at least two antenna oscillators; each directional antenna unit has different working frequency bands; according to the utility model, each frequency band can be effectively covered, and the pain point of long-distance communication is solved.

The unmanned sailing boat comprises a boat body, a steering control mechanism, a sail, a shipborne radar, an electronic scanning sonar, an anemograph, a balancing weight and an electric control unit, the boat body is of a spindle-shaped structure which is symmetrical front and back, and an upper cover plate is arranged at the top of the boat body. A solar panel is arranged on the top of the upper cover plate, and the sail is vertically arranged above the boat body and connected with a steering driving device in the boat body. The two steering control mechanisms are symmetrically arranged at the front end and the rear end of the ship body. The balancing weight is fixedly arranged below the ship body, the electronic scanning sonar is arranged at the bottom of the ship body, the shipborne radar is installed on the front upper portion of the ship body, and the anemograph is arranged on the rear upper portion of the ship body. The electric control unit comprises a shipborne computer, a lithium battery pack, a navigation module and a communication module. The unmanned sailboat provided by the utility model uses solar energy and wind energy as power, has bidirectional sailing capability, is suitable for long-term offshore tasks, reduces the operation difficulty, and improves the scanning efficiency.