82results about How to "Return quickly" patented technology

The invention relates to the technical field of data management and query, and discloses a multi-format data quick query method based on RAG, which comprises the following steps: step a, a user uploads a target file through a front-end interface, and the file is any one of PDF, Word or Excel formats; b, carrying out format verification on the uploaded file; c, selecting a corresponding analysis tool according to a file format, and performing text and structured data extraction on the file by using a PyMuPDF library, a python-docx library or an openpyxl library; and step d, respectively storing the analyzed data into a PostgreSQL (Structured Query Language) database and a Faiiss database. By combining structured data storage and non-structured data vectorization storage, efficient vector similarity retrieval is carried out by utilizing Fiss, and the response time of data query is greatly shortened. Compared with a traditional query method based on full-text search, the method has the advantages that the result most related to user query can be quickly and accurately returned from a large amount of data, so that the data query efficiency is improved.

The invention discloses a slag slipping device for an inclined shaft TBM and the inclined shaft TBM. The problem that in the prior art, in the slag tapping process of an inclined shaft TBM, slag stone is prone to blocking is solved. The TBM slag sliding device for the inclined shaft comprises a slag collecting ring and a base and further comprises a slag sliding groove, an assembling through groove is formed in the slag collecting ring, a slag stone intercepting mechanism is arranged in the assembling through groove, the slag inlet end of the slag sliding groove is located in the assembling through groove and corresponds to the slag stone intercepting mechanism, and the slag sliding groove is connected with the base through an angle adjusting mechanism. The angle adjusting mechanism adjusts the inclination angle of the slag chute relative to the base; an auxiliary slagging-off mechanism is connected to the slag sliding groove through a sliding mechanism, and the sliding mechanism adjusts the position of the auxiliary slagging-off mechanism on the slag sliding groove. By arranging the angle adjusting mechanism at the bottom of the slag chute, when the heading machine performs slope heading work, the slag chute can rotate along the rotating shaft through stretching of the hydraulic rod, so that the angle of the slag chute is adaptively adjusted, the falling kinetic energy of slag stones is increased or reduced, and the problem that self-slag-sliding is difficult to realize is solved.

The present invention relates to a large flat heat spreader with a composite liquid wick, comprising an upper cover plate and a lower cover plate which are connected in a peripheral sealing manner to form a sealed working medium cavity, wherein the sealed working medium cavity is in a vacuum state and is filled with a liquid working medium, wherein the upper cover plate is provided with a first area and a second area, wherein the first area is close to an evaporation end and is provided with a plurality of densely arranged first support columns, and the second area is provided with a plurality of sparsely arranged second support columns, wherein a second liquid wick is placed in the gaps between the second support columns; wherein the lower cover plate is provided with a third area and a fourth area, wherein the size of the third area corresponds to that of the first area and is used for placing the first liquid wick; wherein the size of the fourth area corresponds to that of the second area and is provided with sparsely arranged third support columns, wherein the number and arrangement of the third support columns correspond to those of the second support columns, and the problems of insufficient steam flow space, poor heat transfer performance and poor structural strength in the large flat heat spreader can be effectively solved.

The invention discloses a guide hole pile sinking construction process for a PHC tubular pile in a gobi area of a plateau, relates to the technical field of PHC tubular pile construction, and aims to solve the problems that the construction of the PHC tubular pile is greatly challenged due to complex geological conditions, most of soil is loose gravel and the terrain fluctuation is relatively large in the gobi area of the plateau, and the construction progress is delayed due to the existence of a gravel layer, so that the construction cost is reduced. In order to solve the problem that more time and effort are needed to penetrate through the layers, the construction technology comprises the following steps that S1, preparation before construction is conducted, specifically, PHC pipe pile materials are prepared, surveying and setting-out are conducted through a total station, a theodolite or a level gauge, and a plane control network and an elevation control network of a project are built; the method has the advantages that it is guaranteed that various detection data such as the bearing capacity and the pulling resistance of a pile body meet the design requirements, and the pile is compact, resistant to hitting, high in penetrating capacity and high in adaptability to geological conditions with large terrain changes.

The invention discloses a control method and a control system for a high-voltage transformer substation tubular bus drainage wire disassembling and assembling robot, and relates to the technical field of power construction. Comprising the steps that data collection is conducted, specifically, a high-voltage transformer substation basic data set, an AR equipment data set, a robot data set, a fault data set and a maintenance criterion data set are obtained, the fault data set comprises a real-time fault data set and a historical fault data set, and the high-voltage transformer substation basic data set comprises a drainage wire information data set; according to the method, the AR equipment can quickly establish a control relation with the specified disassembly and assembly robot through a quick connection method, the time for searching and pairing equipment in a traditional method is shortened, the operation efficiency is improved, an operator can quickly create and modify commands on a visual operation interface by utilizing the AR equipment through introduction of a command set and a user-defined command mode, and the operation efficiency is improved. Operation convenience and flexibility are greatly enhanced, and an operator can adjust commands in real time according to site conditions so as to adapt to complex and changeable working environments.

The invention discloses an effective security domain-based post-power-grid-fault operation adequacy repairing method and system, belongs to the technical field of power grid fault repairing, and aims to solve the problems of conservative static limit, lack of visual representation of multi-section security situation and insufficient real-time cooperative correction capability in a traditional N-1 checking method. According to the method, the dynamic section limit is constructed by introducing the adjustable power flow transfer coefficient, and the visual depiction and the global strategy feasibility identification of the multi-section coupling safety boundary are realized based on the effective safety domain concept; and establishing a convex optimization collaborative repair model which takes the operation adequacy as a guide and takes the minimum total energy consumption of stored energy as a target. The improvement of quota formulation from static state to dynamic state, safety analysis from isolation to coupling and correction decision from experience to optimization is realized, and the observability of the operation state and the accuracy of the scheduling decision after the power grid breaks down are remarkably enhanced.

The invention relates to the field of crystal bar machining, in particular to a cutting-off device and a cutting-off method using the device, the cutting-off device comprises a rack, a cutting-off assembly and material carrying base tables, the material carrying base tables are arranged on the two sides of the rack in the length direction, and a cutting gap is formed between the two material carrying base tables; the two material carrying base tables can move towards each other or away from each other so as to adjust the size of a cutting gap; the two material carrying base tables are combined to form a placing platform for placing a crystal bar; the cutting assembly is movably arranged in the length direction of the rack and passes through the cutting gap; comprising a related cutting method; by means of the device and method, edge knocking and scratching of the crystal bar can be avoided in the grabbing process of the mechanical gripper and the wire withdrawing process of the cutting wire saw.

The present invention relates to a folding device for a mechanical coil, comprising an upper bracket (1), a lower bracket (3) and a mechanical coil (4), wherein the upper bracket (1) and the lower bracket (3) are connected together via a latch assembly (2), the lower bracket (3) rotates around the latch assembly (2), and the lower bracket (3) flips up and down relative to the upper bracket (1); the mechanical coil (4) is fixed to the lower bracket (3) via bolts. When a railway engineering vehicle is in motion, the mechanical coil (4) of the folding device and the rail (12) are parallel and maintain a certain distance, and when a working device (11) is in motion or extends from the lower end (10) of the front of the railway engineering vehicle, the folding device can rotate toward the front of the vehicle by a certain angle to completely clear the working device (11) so that the working device can work normally.

A charging system (1) that performs power supply suitable for charging a capacitor (52) of a portable terminal (10) without being limited by the power supply capability of an external power source is provided. The charging system (1) includes a charging device (60) that charges the portable terminal (10) with power from an external power source such as a personal computer (2). This charging device (60) includes a secondary battery (82) and a power transmission coil (83). The charging device (60) also includes a power supply control unit (81) that performs: control of charging of the secondary battery (82) with power from an external power source; and control of charging of the capacitor (52) of the portable terminal (10) via the power transmission coil (83) with power from the secondary battery (82).

The invention provides a method for asynchronously and concurrently storing domain name registration information, and the method comprises the steps: obtaining a transaction result through a transaction component, the transaction result comprising transaction success and transaction failure; if the transaction result is that the transaction succeeds, registration information is obtained, a task object is constructed, the task object is sent to an asynchronous storage component, the registration information is stored through the asynchronous storage component, and the task object is organized through the registration information. According to the method, an asynchronous storage component is provided, the asynchronous storage component can decouple a data storage component and a transaction component, influence on the transaction component is avoided, and by organizing registration information as task objects, asynchronous storage is achieved, and the reliability of data storage is improved.

The invention relates to the technical field of laser machining, in particular to air conditioner accessory laser etching equipment which comprises a positioning table, a base and a laser, one end of an electromagnetic valve communicates with an air blower, the other end of the electromagnetic valve communicates with a first vacuum cavity, and the air blower is arranged on a body and used for blowing air into the first vacuum cavity to relieve the vacuum state of the first vacuum cavity; the flexible positioning pad is driven to rebound and reset, so that the product is pushed out of the bottom groove through the flexible positioning pad; according to the air conditioner accessory cutting device, the positioning groove used for containing a product is formed in the bottom groove through the flexible positioning pad, so that the edge of an air conditioner accessory is not prone to being collided and damaged, meanwhile, after cutting, the product in the bottom groove is pushed out through resilience of the flexible positioning pad, dismounting of the cut product is facilitated, and protection of the edge of the product is facilitated. The problem that an existing laser etching device easily causes damage to the edge of the air conditioner accessory is solved, and meanwhile the problem that the air conditioner accessory is inconvenient to disassemble after being cut is solved.

The invention provides an automatic pipe distribution mechanism for a radiator core. The automatic pipe distribution mechanism comprises a rack and a turnover pipe distribution assembly. The overturning pipe distribution assembly comprises an overturning conveying belt, an overturning driving piece, a pipe distribution conveying belt and a pipe distribution driving piece. The turnover conveying belt is rotationally mounted on the rack and is driven by the turnover driving part to rotate circularly; the overturning conveying belt is provided with clamping grooves which are arranged in the horizontal direction at intervals in parallel, and the width of the clamping grooves is larger than or equal to the width of the flat pipes. The pipe distribution conveying belt is rotationally installed on the rack and driven by the pipe distribution driving part to rotate circularly, pipe distribution grooves are formed in the pipe distribution conveying belt at intervals in parallel, the width of the pipe distribution grooves is larger than or equal to the thickness of flat pipes, and the interval between the pipe distribution grooves is larger than or equal to the thickness of fins; the feeding end of the pipe distribution conveying belt is located under the output end of the overturning conveying belt. The automatic pipe arranging device is high in automation degree in the overturning pipe arranging process, does not need manual assistance, and meanwhile has the advantages of being high in continuity and high in efficiency.

The invention belongs to the technical field of bulletproof helmets, and discloses a composite bulletproof helmet and a preparation method thereof.The composite bulletproof helmet comprises an anti-penetration shell, an STF-negative Poisson's ratio energy absorption layer is fixedly connected to the interior of the anti-penetration shell, a head protection plate is arranged on the anti-penetration shell, and the composite bulletproof helmet further comprises a deflection buffering piece arranged on the anti-penetration shell and used for buffering the deflection of the anti-penetration shell; the protection effect of the head protection plate is improved. The sleeve plate and the sliding rod are matched with the arc-shaped plate and the spring to support the head protection plate, when the head protection plate is impacted, the head protection plate can rotate and incline along the sliding rod, meanwhile, the spring and the rotating assembly buffer the head protection plate through the arc-shaped plate and the sliding rod, a bullet is effectively guided to slide along the helmet, impact energy is dispersed, and the safety of the bullet is improved. According to the structure, rigid impact is converted into elastic buffering and inclined sliding, stress concentration of impact points is reduced, impact loads borne by the head and the neck are reduced, and risks such as head hypsokinesis and cervical vertebra injury are avoided.

The utility model belongs to the technical field of screw machining, and particularly relates to a lathe material returning mechanism which comprises a lathe body, a vibration feeding disc and a clamping jaw, the vibration feeding disc is installed on one side of the lathe body, the clamping jaw is arranged on the surface of one end of the lathe body in a rotating mode, a material discharging plate is arranged below the clamping jaw, a material returning hole is formed in an inner cavity of the lathe body in a penetrating mode, and the material returning hole is communicated with the vibration feeding disc. One end of the material returning hole is connected with the center of the clamping jaw in a penetrating mode, a material returning rod is movably inserted into an inner cavity of the material returning hole, and the end, away from the clamping jaw, of the material returning rod extends out of the cavity wall of the lathe body. The air cylinder drives the material returning rod to move in the material returning hole through the connecting rod, one end of the material returning rod stretches out of the clamping jaw, the lead screw can be rapidly ejected out of the clamping jaw through the material returning rod, rapid material returning of the lead screw is achieved, the machining efficiency of the lead screw can be improved, meanwhile, the distance between the material returning rod and the clamping jaw is adjusted, and the machining efficiency is improved. And the screws with different lengths can be rapidly returned in the using process, and the application range is wider.

The invention discloses a cultivation method for promoting cassava flowering, and belongs to the technical field of crop cultivation. The method comprises the following steps: (1) variety selection; (2) potted plant preparation; (3) cassava planting; (4) potted plant management; (5) first fertilization; (6) second fertilization; (7) spraying flower-inducing liquid; (8) flower preservation. The invention uses a matrix mixed with vermiculite, perlite and coarse sand to make the tubers sprout as soon as possible, and the potted plants are placed in an arch shed for cultivation to promote the growth of plants as soon as possible and advance the growth period. The phosphate fertilizer used in the first fertilization can make the stems and branches of the plants tough and promote the formation of flower buds. The potash fertilizer used in the second fertilization can promote the photosynthesis of the plants and promote the fruiting of the plants. After fertilization, sufficient water is poured to make the soil compacted so that the cassava is not easy to expand the tuberous roots. Then, the flower-inducing liquid is sprayed to make the plants bloom in advance and extend the flowering period. The invention makes the differentiation of cassava flower buds early, improves the flowering ability of cassava, and achieves the purpose of flowering and fruiting.

The utility model discloses a fixed electronic tag reader-writer, including: a main body, a damping mounting assembly and a locking mechanism, the main body includes a reader-writer body and a plug-in block fixedly connected to the rear side of the reader-writer body, the side wall of the plug-in block is provided with a pin hole, the damping mounting assembly includes a mounting plate, a housing, a damping spring, a movable batten, a connecting column and a mounting block, and the mounting plate is provided with a through hole. The reader-writer has the beneficial effects that through the arrangement of the damping mounting assembly, when the reader-writer body is impacted, the impact can be buffered and damped through the cooperation of six groups of damping springs, so that the reader-writer body is prevented from being damaged, and the service life of the reader-writer body is prolonged. Meanwhile, the locking mechanism is arranged to be matched with the inserting block to install the reader-writer body, compared with installation through screws, disassembly and assembly are convenient, and the problem that the screws are likely to slip after multiple times of disassembly and assembly is avoided.

This utility model discloses a self-adjusting dual-wheel caster for AGVs, belonging to the field of AGV technology. It includes a mounting base with a bracket rotatably connected to its bottom. Casters are symmetrically arranged on both sides of the bracket. A movable groove is formed at the bottom of the bracket, housing an automatic adjustment mechanism for the tire tread to contact the ground. The two casters are respectively mounted on the left and right sides of the self-adjusting mechanism. An auxiliary adjustment mechanism for resetting the self-adjusting mechanism is provided above it. This utility model, through its movable groove and free adjustment mechanism, allows the casters to automatically adjust their angle according to load changes, ensuring the tire tread remains in effective contact with the ground, enhancing grip and driving stability. The auxiliary adjustment mechanism utilizes the elasticity of a spring to ensure the free adjustment mechanism quickly returns to its original position, compensating for the reset delay problem inherent in purely mechanical automatic adjustment. Combining manual intervention with automatic adjustment improves system reliability.

The utility model relates to a falling rod sealing device belongs to the technical field of industrial equipment sealing. Including falling rod frame and installing elastic support mechanism on the falling rod, and the falling rod is hung in the downside of falling rod frame through chain, elastic support mechanism includes locating block, stud, adjusting nut and spring, locating block fixed mounting is in the falling rod frame, the stud is set in the locating block through the coupling, and the adjusting nut of locating block below is sleeved on the stud, and the spring is set between adjusting nut and falling rod, and the falling rod is closely contacted with the trolley sealing plate through the elastic force provided by spring. The utility model adds the elastic support mechanism on the basis of existing falling rod, so that in addition to falling rod can rely on the self weight and trolley top surface contact, still can rely on the elastic force that elastic support mechanism adds and trolley top surface contact, ensure that the sealing is good, avoid the air leakage.

The utility model provides a seat collision recovery energy-absorbing mechanism and a seat. The seat collision recovery energy-absorbing mechanism comprises a recovery energy-absorbing mechanism, a fixed plate and a movable plate, the moving plate is rotatably connected with the fixed plate, and the moving plate is connected with the seat angle adjuster; the return energy absorption mechanism comprises a lock hole, a spring bolt matched with the lock hole, an energy absorption groove, an energy absorption piece and an energy absorption bolt penetrating through the energy absorption groove and the energy absorption piece, a through hole is formed in the energy absorption piece, under the locking state that the spring bolt is inserted into the lock hole, the movable plate is fixed relative to the fixed plate, and the energy absorption bolt penetrates through the through hole to be connected with the energy absorption piece; in the unlocking state that the lock tongue is separated from the lock hole, the moving plate rotates relative to the fixed plate, and the energy absorption bolt is separated from the through hole and then moves relative to the energy absorption groove to absorb energy. The utility model relates to the technical field of automobile seats, and can solve the problems that an automobile seat return mechanism in the prior art is large in size, poor in static strength and stability, complex in structure and low in collision return speed.

The present application discloses a self-moving device, including: a boundary label detection unit, a positioning unit, and a map establishment module, which is used to trigger the self-moving device to walk along the boundary of the working area, and form a boundary position coordinate sequence of the working area according to the position coordinates recorded by the positioning unit; it also includes a map correction module, when the current boundary label is detected, the actual mileage between the previous boundary label is obtained according to the boundary length between the pre-stored boundary labels; the map correction module is used to correct the coordinate position of the current boundary label and the previous boundary label according to the difference between the actual mileage and the recorded mileage. A method for establishing a work area map is also provided. The self-moving device provided by the present application establishes a work area map more accurately, which improves the accuracy of positioning and navigation according to the map.

The invention provides pervious concrete water permeability detection equipment and a detection method thereof.The cleaning and scraping mechanism further comprises a rotating shaft, a hook, a deformation ring and a sliding block, the rotating shaft is hinged to the upper end of the side, provided with a sliding groove, of a supporting plate, the hook swings on one side of the rotating shaft, and the deformation ring is embedded in the side, close to the supporting plate, of the hook; the sliding block is located at the end, away from the hook, of the deformation ring, the end, away from the rotating shaft, of the hook is arranged in an arc shape, the hook extends to one side of the scraping ring, the end, at the rotating shaft, of the hook swings in an inclined mode, the hook perpendicularly corresponds to the clamping ring, and a groove is formed in the outer side of the clamping ring and is in an arc shape. The outer side or the upper end of the clamping ring perpendicularly abuts against the upper end of the hook, at the moment, the threaded rod can drive the hook to move upwards through the clamping ring, then the scraping ring can slide upwards in the material barrel, residual concrete on the inner wall of the material barrel can be cleaned through the scraping ring, and the situation that the residual concrete on the inner wall of the material barrel cannot be rapidly cleaned is avoided.

The utility model provides a kind of pneumatic device structure, including cylinder barrel, lower end cover, upper end cover, piston rod, piston and spring;One end of cylinder barrel is connected with lower end cover, the other end of cylinder barrel is connected with upper end cover;Piston is arranged in cylinder barrel, and piston can move up and down in cylinder barrel;The space formed between cylinder barrel, lower end cover and piston is rod cavity, and the space formed between cylinder barrel, upper end cover and piston is rodless cavity;Spring is arranged in rodless cavity, and spring is located between piston and upper end cover, and the two end faces of spring are respectively in contact with piston and upper end cover;One end of piston rod penetrates lower end cover and is connected with piston;Rod cavity is connected with air compression device;Upper end cover is provided with through hole, and through hole penetrates upper end cover;The motion stability of air cylinder, reset reliability and overall durability can be improved.

A kind of charging device for sharing massage device storage device, including outer casing, the storage box for carrying waistband type massager is retractably arranged in outer casing, the power of battery is guaranteed by external socket, the bottom of storage box is fixedly provided with support plate, support plate is formed with the load groove for placing waistband type massager at the center of storage box, the charging port for charging wire to go out is opened in the bottom center of load groove;Between battery and charging port, charging wire is provided, charging wire includes charging head in charging port and soft wire for connecting charging head and battery.The beneficial effects of the utility model are: charging port is set in the bottom center of load groove, optimization returns process, user does not need additional adjustment position to aim at charging head, improves convenience;Soft wire connects charging head and battery, can flexibly bend or stretch when storage box retracts and moves.

The invention provides an unmanned aerial vehicle management and control comprehensive service device based on the 5G technology, and the device comprises a buffer supporting mechanism which is detachably disposed at the bottom of an unmanned aerial vehicle body, and the bottom of the buffer supporting mechanism is provided with a data transmission module. The data transmission module is provided with a module shell, a processor, a power supply module, a data interaction module, a password module and a 5G communication module are arranged in the module shell, the data interaction module is connected with the processor and used for data interaction with the unmanned aerial vehicle, and the password module is connected with the processor and used for data interaction with the unmanned aerial vehicle. The 5G communication module is in communication connection with the control center through a 5G network, and the power supply module is used for supplying power to the processor, the data interaction module, the password module and the 5G communication module; according to the invention, an existing unmanned aerial vehicle can be upgraded to a networked unmanned aerial vehicle, video data, image data and operation data acquired by the unmanned aerial vehicle can be quickly returned through a 5G network in real time, and remote control of the unmanned aerial vehicle can be carried out according to working needs without being limited by distance.

The invention provides an alignable IC pre-pressing machine and an operation method. An inclined plate and an extension frame are inclined by 15-45 degrees, the extension frame and the inclined plate are inclined towards one end of a cavity of a mold, the inclined plate is in linkage relation with a weight through a rotating bearing, the whole extension frame is in a transverse 7 shape, and when a pressing head is embedded into the cavity of the mold, the pressing head is fixed to the mold. The outer side wall of the pressing head is extruded to one side of the extending frame, a cross rod penetrates through the end, close to the inclined plate, of the extending frame, a hinge is hinged to the interior of the inclined plate, swing arms are connected to the two sides of the hinge in a swinging mode, sliding blocks are arranged at the ends, away from the hinge, of the swing arms, and rubber rings are embedded into the two ends of the sliding blocks. At the moment, the extension frame can limit the two sides of the pressure head, so that when the pressure head slides downwards into the cavity of the mold, the downward sliding inertia of the extension frame can be utilized to assist the pressure head to be aligned with the interior of the cavity of the mold.

The utility model discloses a clamping speed changing structure based on a ceramic tile leveling machine. The clamping speed changing structure comprises a leveling machine main body mechanism and a speed adjusting mechanism, the speed adjusting mechanism comprises a gear box, transmission shafts, one-way bearings, a driving wheel and a driven wheel, the transmission shafts, the one-way bearings, the driving wheel and the driven wheel are arranged in the gear box, at least one transmission shaft is connected with the driving motor, at least one transmission shaft is connected with the lead screw, and each transmission shaft is provided with one one-way bearing. A group of driving wheels is arranged on each group of one-way bearings, each group of driving wheels is in mechanical transmission connection with a group of driven wheels, and the driven wheels are also arranged on the transmission shaft. Under the condition that the running speed of the driving motor is not changed, the forward and reverse movement of the driving motor is controlled, so that the speed of the movable clamping block returning to the starting point position from the clamping position is higher than the speed of the movable clamping block clamping the leveling block, the movable clamping block can return to the starting point position more quickly during leveling, and next operation is facilitated.

The application discloses a fixed brake caliper assembly, an assembling method and a vehicle, and relates to the field of automobile parts, and the fixed brake caliper assembly comprises a brake caliper, a brake block, an auxiliary elastic member and a sound-absorbing sheet, the brake caliper comprises a positioning pin and a main compression spring, the auxiliary elastic member is clamped between the positioning pin and the brake block, the auxiliary elastic member and the main compression spring form a double-side auxiliary return structure, the sound-absorbing sheet is provided with lateral limiting structures at two ends in the long end direction of the brake block, and the two lateral limiting structures are elastically attached to two guide surfaces of the brake caliper. The application can solve the industry common problem that it is difficult to control the drag torque of the brake block and the brake disc in the prior art and the Rattle noise problem caused by the clearance collision of the brake system, significantly improves the brake NVH performance, and solves the problems of the complicated return and sound-absorbing structure, poor universality and high modification cost in the prior art.

The utility model relates to a compact projection type LED car light, including base one, still including setting on the upper end of base one half -reflector cover, and half -reflector cover is composed of multiple continuous free surface, and the upper end surface of base one is provided with the locating groove, and the inside of locating groove is provided with the locating seat, and the upper end of locating seat is installed with LED light source, and the left end of base one is provided with mobile assembly, and mobile assembly is installed with the light shield on, and mobile assembly is used for moving to the light shield, and it realizes light regulation, and the half -reflector cover of multiple continuous free surface composition, the novel mobile assembly utilizes the magnetic force to realize the non -contact drive, and there is no mechanical friction, and the service life is long, and there is no noise in operation, and the response speed is fast, and the magnet layout of magnetic pole opposition is adopted to form controllable magnetic field, and the control precision is promoted, and the reset spring is combined with PWM signal regulation, ensures that the light shield moves steadily accurately, realizes stable and reliable accurate intelligent dimming.

The invention relates to a multi-level mixed search method and device, equipment and a medium, and the method comprises the steps: obtaining a first hierarchical navigation chart which is used for representing the proximity relation between corresponding nodes of commodities in a plurality of online shops of an e-commerce platform, each node comprises a high-dimensional semantic vector of the corresponding commodity and an attribute scalar which indicates the attribution category of the corresponding commodity in the e-commerce platform hierarchical classification system; corresponding to each attribution category indicated by the attribute scalar, respectively constructing a second hierarchical navigation map which corresponds to each attribution category and represents a proximity relationship between corresponding nodes of the commodity corresponding to the attribution category; responding to a commodity search event, and determining a query category and a query vector corresponding to query information carried by the event; and calling the second hierarchical navigation map with the same attribution category as the query category as a target navigation map, and retrieving nodes matched with the query vector semantics from the target navigation map. According to the invention, the search efficiency and accuracy of the e-commerce platform for providing the commodity search service can be improved.