49results about How to "Ensure smoothness" patented technology

The utility model discloses a kind of goods classification devices, specifically related to goods classification equipment technical field.It includes main conveying mechanism, several pusher mechanisms, several secondary conveying mechanisms, the main conveying mechanism includes first mounting bracket, the inside of first mounting bracket is provided with several conveying rollers, the top of first mounting bracket is fixedly installed with detection module, several pusher mechanisms are arranged between the gap of several conveying rollers, the secondary conveying mechanism is arranged at the side of pusher mechanism, and the number of pusher mechanism and secondary conveying mechanism is consistent.The utility model discloses when retracting after push plate completes goods push, if subsequent goods have entered classification area by transmission belt, flat retraction path can collide with subsequent goods, resulting in the defect that goods are stacked or damaged, and a kind of goods classification device is proposed, the push plate only protrudes the top of main conveying mechanism in pusher process, and push plate will shrink to the bottom of main conveying mechanism after pusher is completed.

The utility model relates to intelligent equipment pasting film device technical field especially discloses a split cooperation formula pasting film device, including bearing base and with bearing base cooperation use's positioning frame, external intelligent terminal passes via bearing base limit, be equipped with first resistance and second resistance on the positioning frame, the positioning frame is used for the outside of external intelligent terminal of bearing base limit and is set, makes external intelligent terminal between bearing base and positioning frame, first resistance is used for external resistance smart terminal's screen frame, external protective film is used for inserting between second resistance and external intelligent terminal's screen, positioning frame is equipped with abstracts the mouth, when positioning frame sets in the outside of external intelligent terminal, the release film of protective film is driven under the draw -in strip and takes out positioning frame through abstracts the mouth to make the functional film of protective film pastes to the screen surface of external intelligent terminal.

The application belongs to the technical field of positioning and measurement, and particularly relates to a target positioning method and device combining CSI coarse positioning and Y-type CCD fine correction, which comprises the following steps: S1, CSI acquisition equipment is arranged in a target area, and CSI data between a sending end and a receiving end is acquired; S2, a Y-type CCD sensor is geometrically calibrated and a coordinate system is corrected, and coordinate reconstruction is completed; S3, the CSI data is preprocessed, noise is removed, and input is normalized; S4, time domain features of the CSI are extracted by using a time domain branch; S5, frequency domain features of the CSI are extracted by using a frequency domain branch; S6, a gating fusion module is used to fuse the time domain and frequency domain features, and the approximate position coordinates of a target are output; S7, the Y-type CCD sensor is controlled to optically acquire a target area, and point light source coordinate information is acquired; and S8, error correction is performed on the data acquired by the Y-type CCD, and the accurate position coordinates of the target are output.

This utility model provides a pneumatic lifting device for electronic trays, including a tray positioning assembly, a drive assembly, and a handling robot. The tray positioning assembly inserts a central positioning cone into the center hole of the tray, and, in conjunction with a pressure plate, clamps the tray to achieve precise vertical positioning. The drive assembly uses a downward-pressing cylinder to drive the limit plate to rise and fall, with linear bearings ensuring stability. The handling robot uses a rotary cylinder, a gripper cylinder, and a synchronous belt mechanism to achieve 45-degree rotation and extend / retract the fork, completing the tray gripping and handling. This device has a compact structure, high positioning accuracy, and strong adaptability, significantly improving the efficiency and stability of automated production, and is suitable for various electronic trays.

This invention provides a maritime rescue method and system based on a heterogeneous unmanned system. The method includes: Step S1: acquiring accident information to generate a multi-dimensional decision model; the accident information includes accident type, accident location, information of personnel to be rescued, and environmental information; Step S2: automatically matching a corresponding rescue plan based on the multi-dimensional decision model; Step S3: deploying the heterogeneous unmanned system according to the rescue plan, enabling it to perform autonomous unmanned search along the rescue path and identify the searched targets; Step S4: controlling the heterogeneous unmanned system to complete the rescue based on the identification results. This invention effectively solves the main problems existing in current maritime rescue technologies and provides a complete technical solution for achieving efficient, rapid, and intelligent unmanned maritime rescue.

This invention provides a sample entry / exit method and system. Upon receiving sample entry / exit instructions, it automatically determines the task sequence and generates a task scheduling strategy based on the current number of idle robots. This achieves a fully automated process from task reception to execution, significantly reducing manual intervention and improving work efficiency. It also ensures the rationality and timeliness of task allocation, demonstrating a high level of intelligence. By comprehensively considering the task sequence and the number of idle robots, task allocation can be dynamically adjusted to ensure optimal resource allocation, thereby improving overall entry / exit efficiency. Furthermore, based on warehouse layout, shelf location, sample type and specifications, and task allocation results, precise movement paths can be planned for each target robot. This not only shortens robot travel time and reduces energy consumption but also avoids collisions and path conflicts between robots, ensuring the safety and smoothness of entry / exit operations.

This application relates to a lamp fixture, which falls within the field of lighting technology. The fixture includes a lamp body heat sink, a light-transmitting plate, and a side cover. The lamp body heat sink has a receiving groove, and the light-transmitting plate is installed within the receiving groove. The side cover is rotatably mounted on the lamp body heat sink via a rotating component. By flipping the side cover, it can move along the direction of movement of the light-transmitting plate, thereby sealing the opening of the receiving groove. The side cover is fixed to the lamp body heat sink by a snap-fit ​​limiting component. This application simplifies the lamp fixture structure and assembly process through the design of the rotating component and the snap-fit ​​limiting component, reducing manufacturing costs and making optical component replacement more convenient, thus improving maintenance efficiency. Simultaneously, the sealing design of the snap-fit ​​limiting component effectively seals the groove opening, preventing dust and insects from entering, enhancing dust and insect resistance, and ensuring stable operation of the optical components. This design not only solves traditional problems but also improves market competitiveness and user experience by simplifying the structure and reducing costs.

This utility model relates to the field of automotive manufacturing technology and discloses an installation and positioning structure for automotive taillights. It includes an installation housing, a fixed housing fixedly connected to the top of the installation housing, and an installation plate fixedly connected to the top of the installation housing. A sliding groove is provided on the top of the installation housing. This utility model uses a servo motor to drive the operation of a first transmission column, which in turn drives the meshing transmission of a first bevel gear and a second bevel gear, thereby achieving synchronous rotation of the second transmission column. This structural operation is further transformed into the rotation of a rotating disk, ultimately driving a moving block to slide smoothly within a limiting sleeve, allowing the insert block to accurately insert into the interior of the limiting column. This achieves rapid fixing of the taillight without the need for manual adjustment, improving installation efficiency and accuracy. Simultaneously, the cooperation between the guide block and the sliding column ensures stable insertion of the insert block, avoiding problems of insecure fixing due to shaking or errors, and enhancing the installation stability and reliability of the taillight.

The application relates to a hybrid brake coordination control method, device, equipment and medium of an unmanned vehicle. The method comprises the following steps: acquiring a desired deceleration of the vehicle, determining a maximum effective electric brake deceleration at a current vehicle speed; when an electric brake safety intervention condition is met, selecting a pure electric brake mode or a hybrid brake mode according to a comparison result of the desired deceleration and the maximum effective electric brake deceleration; when the hybrid brake mode is adopted and the vehicle speed is reduced to below an electric brake enabling speed threshold, performing hybrid brake exit control, and judging an exit opportunity based on a duration, an actual deceleration deviation and a hydraulic brake theoretical deceleration deviation. The method can improve the dynamic response, energy recovery rate, brake safety and reliability of the hybrid brake control.

This invention relates to the technical field of meibomian gland massage, and in particular to an intelligent control method and system for a meibomian gland massager based on AI recognition. The method includes the following steps: acquiring three-dimensional point cloud data of the patient's meibomian gland surface; extracting feature points and constructing their three-dimensional coordinates based on the three-dimensional point cloud data; generating the massage motion trajectory of the massager using an adaptive path planning algorithm based on the three-dimensional coordinates; acquiring image data of the patient's meibomian gland; retrieving massager parameter data from a preset feature database based on the image data; inputting the massager parameter data into a preset control model; outputting the massage time and massage light intensity; and controlling the massager to massage the patient's meibomian glands based on the massage time and massage light intensity. This application has the effect of improving the massage effect on the patient's meibomian glands.

This utility model relates to the field of profile bending machine technology, and more particularly to an anti-deviation conveying mechanism for a profile bending machine. It includes a power roller machine tool and multiple power rollers rotatably mounted within the machine tool. Two pairs of symmetrically arranged fixing blocks are fixedly mounted on the power roller machine tool, and fixing rods are fixedly mounted on each pair of fixing blocks. This utility model uses two guide plates to initially position the profile. Combined with the conveying action of the power rollers, the profile is conveyed from the right ends of two push rods, thus positioning it and preventing deviation that could affect the subsequent bending effect. The extension and retraction of the electric telescopic rod and the rotation of the rotating gripper effectively rotate the profile, which was originally parallel to the axis of the power rollers, preventing blockage between the two guide plates and ensuring smooth and stable transmission of the profile. This significantly improves the overall system efficiency and safety.

The utility model relates to the technical field of rehabilitation apparatus, concretely relates to a portable wrist joint autonomous rehabilitation exercise traction device, its characterized in that: including lower arm supporting plate, palm holding plate, first mounting seat, second mounting seat, traction drive mechanism and one-way self locking mechanism, lower arm supporting plate installs on the first mounting seat, palm holding plate installs on the second mounting seat, and at least one bandage assembly is equipped on lower arm supporting plate and palm holding plate, and the second mounting seat is slidably connected with the first mounting seat through the sliding assembly, and the traction drive mechanism is used for moving the second mounting seat relative to the first mounting seat, and the one-way self locking mechanism is used for playing one-way self locking effect to the movement of second mounting seat. The utility model whole simple structure is portable, convenient operation, is suitable for family use, can realize the adjustment to the traction force, effectively ensures the stability and accurate control of traction force, can better satisfy the autonomous rehabilitation exercise demand of patient, improves rehabilitation efficiency and treatment effect simultaneously.

This utility model provides a packaging carton flipping device, including horizontally arranged first and second conveyor belts and a stop shaft. The first conveyor belt transports the carton, and the second conveyor belt is offset vertically from the first conveyor belt. The stop shaft is located below the carton and in a special position, offset from the vertical center axis of the carton and behind the moving direction of the second conveyor belt. During operation, the carton is conveyed by the first conveyor belt and comes into contact with the stop shaft. The bottom is obstructed, and the top flips 90° around the stop shaft due to inertia and falls into the second conveyor belt. This device solves the problems of complex structure, high cost, easy damage to the carton, and unstable flipping of traditional flipping devices. Flipping is achieved through a simple mechanical structure, reducing cost and maintenance difficulty; the special position of the stop shaft and the soft rubber cover reduce damage to the carton; the design of the limiting plate and rotating stop shaft ensures smooth and accurate flipping. The conveyor belts are made of soft plastic belts, and the upper belt is supported by soft rubber tubes, further improving the stability and service life of the device, effectively improving the efficiency of the packaging production line and product quality.

The utility model relates to the field of examining bed discloses an ultrasonic department examining bed with protection structure, including frame and elevating system, the both ends of frame upper surface are provided with protection mechanism, elevating system is located frame lower extreme other side, protection mechanism includes two baffle, both sides of one end of two baffle far from frame center are all provided with hinge, both sides of two baffle all are provided with second cavity, one side of one end of two baffle close to frame center all are provided with first cavity, a plurality of first cavity inner wall all are provided with threaded rod. In the utility model, rotate operating disc, start driving bevel gear, drive driven bevel gear and threaded rod rotation, make the convex block on threaded sleeve slip out and pass through the plate hole, release the clamping, and the operator subsequently pulls the handle and puts down the baffle, and the patient lies on the bed conveniently, and reverse operation can fix the baffle again, and the starting of electric telescopic link makes the connecting plate tilt, and the patient stands up or lies independently conveniently.

The utility model relates to honeycomb aluminum sheet technical field, concretely is a kind of honeycomb aluminum sheet wall-hanging device for airport terminal, including multiple aluminum plate body, the surface of aluminum plate body is provided with mounting device, and mounting device includes multiple connecting rod located above aluminum plate body, the inner wall of connecting rod is provided with multiple bolts, the surface slidingly connected of connecting rod has sliding sleeve, the surface fixedly connected of sliding sleeve has connecting seat, the inner wall of connecting seat is inserted with iron seat, the both sides of iron seat are respectively fixedly connected with auxiliary plate, the both sides inner wall of iron seat are respectively slidingly connected with multiple groups of supporting plate, the utility model, by setting mounting device, by bolt, connecting rod and sliding sleeve are installed, then iron seat is inserted in connecting seat, when installing aluminum plate body, only need to push supporting plate, spring stress, place good aluminum plate body and then loosen, supporting plate cooperates with auxiliary block to limit aluminum plate body, complete installation, greatly shorten installation time, improve construction efficiency, and subsequent disassembly maintenance is convenient.

This invention relates to the field of path optimization technology, and proposes a method for optimizing robot inspection paths and rapid production changeover based on digital twins. The method includes: constructing a digital twin model of the physical inspection equipment; configuring the joint hierarchy and motion constraints of the visual inspection robot based on the robot's DH parameters; controlling the end effector of the visual inspection robot to move to the inspection point on the battery tray based on an inverse kinematics algorithm, generating a teaching point sequence and an initial inspection path; inputting the teaching point sequence into an improved ant colony algorithm, optimizing the initial inspection path by incorporating genetic mutation operations and a backtracking reset mechanism, obtaining the optimized path; driving the inspection equipment to execute the complete inspection process based on the optimized path, and verifying the feasibility of the flipping timing of the flipping positioner, the movement of the positioning fixture, and the coordination of the visual inspection robot's trajectory; and converting the optimized path into control commands and sending them to the inspection equipment.

This invention discloses a fuzzy adaptive intelligent wiper motor control method and system based on noise evaluation. It includes an initial speed curve design module for generating an initial angular velocity curve based on the wiper operating frequency and wiping angle; an adaptive algorithm optimization module that processes real-time wiper operating data through a fuzzy logic controller, outputting speed and acceleration adjustment values; a neural network optimization module that uses a multi-layer feedforward neural network to optimize the fuzzy logic controller parameters to minimize the objective function; and a motor control module that adjusts the motor setpoint in real time based on the optimized adjustment values. This invention solves the problem of abnormal noise from automotive wipers, which is caused by excessive noise or insufficient wiping efficiency due to improper speed control. It significantly reduces operating noise, ensures that the wiping frequency meets regulatory requirements, and improves the adaptability and stability of the control system.

This invention relates to the field of door and window profile cutting technology, and more particularly to a cutting support device for calibrating the verticality of the end face of PVC door and window profiles. The device includes support legs and a worktable, with the worktable fixedly connected to the top of the support legs. A horizontally movable cutting device is located on the rear side of the top of the worktable. This invention significantly improves clamping stability and processing accuracy during the cutting process by integrating a dynamic pressure compensation mechanism. Specifically, the calibration extrusion plate performs initial clamping and verticality calibration of the profile under the drive of a micro-electric steel. An integrated thin-film pressure sensor monitors the clamping force in real time and forms a closed-loop control system with the PLC controller and the micro-electric steel. When the movable cutting device encounters resistance changes due to uneven profile wall thickness, the system can instantly fine-tune the clamping force based on pressure feedback, achieving active suppression of cutting vibration and dynamic compensation for clamping loosening, thereby ensuring the verticality and flatness of the cut end face.

The present application relates to the technical field of electric machines, and relates to an online efficiency optimization method for a permanent magnet synchronous motor. For each preset fixed control period of a motor controller of a target vehicle, a motor battery state parameter in the fixed control period is acquired. The motor battery state parameter is preprocessed. The preprocessed motor battery state parameter is input into an input layer of a current prediction model, and then sequentially passes through a first hidden layer, a second hidden layer and an output layer to obtain a predicted current instruction. According to the predicted current instruction and a preset current constant, current values of d-axis and q-axis are determined, so as to control the motor controller according to the current values of d-axis and q-axis. Through the trained current prediction model, the best current distribution instruction can be quickly given under any combination of speed, torque, battery state and temperature, and the motor efficiency is significantly improved.

This invention discloses a GNSS baseline ill-conditioned solution method based on deep learning regularization, relating to the fields of intelligent solution control and numerical stability enhancement. By constructing a multi-source observation dataset, the method models the degree of numerical instability during the solution process using an ill-condition model. Based on this, an ill-condition adaptive gating solution strategy scheduling mechanism is introduced to dynamically adjust regularization parameters, weight matrix configuration, and ambiguity fixing strategies. While maintaining the traditional weighted least squares baseline solution framework, the method effectively suppresses the numerical amplification effect under ill-condition conditions by combining regularization constraints with iterative solution, improving the stability and convergence reliability of baseline solutions in complex scenarios such as urban canyons and tree-shaded environments. This invention can achieve adaptive optimization of the baseline solution strategy without relying on manual parameter tuning, significantly improving the continuity and robustness of GNSS high-precision positioning in ill-condition environments.

This utility model relates to a tooling for controlling the welding deformation of a screen frame in a multi-stage sorting machine. 1. It is used to fix the screen frame, which includes a rectangular screen plate at the bottom, positioning side plates arranged opposite to each other on the left and right, and connecting side plates arranged opposite to each other in the front and back. The positioning side plates and connecting side plates are welded together above the screen plate to form a square screen frame. The clamping device includes an inner positioning plate and an outer positioning plate. The top-fixing device includes a top-pressing member that can be movably pressed against the outside of the connecting side plate so that the two sides of the connecting side plate abut against the edges of the positioning side plate. The rigid fixing of the clamping device and the pressing of the top-fixing device form a complementary constraint, so that the large-area clamping of the positioning side plate ensures the positional accuracy of the positioning side plate as a reference. The local pressing of the top-pressing member is specifically aligned with the connecting side plate. The top-pressing member allows the top pressure to be dynamically adjusted with the welding thermal cycle to compensate for the shrinkage deformation of the weld during cooling. The slight displacement of the connecting side plate is compensated by adjusting the pressing pressure.

This utility model belongs to the technical field of flavoring devices, specifically relating to a flavoring device for processing braised meat. It includes a marinating mechanism comprising a storage cylinder, a heat-conducting cylinder, electric heating tubes, an electrical socket, a heat-insulating cylinder, a cylinder cover, and a pressure relief valve. The outer wall of the storage cylinder is wrapped with a heat-conducting cylinder for heat transfer. Several electric heating tubes are embedded inside the heat-conducting cylinder, and the ends of these electric heating tubes are connected to the same electrical socket. This design heats the heat-conducting cylinder with electric heating tubes, and then the heat-conducting cylinder evenly transfers the heat to the storage cylinder, ensuring that the brine maintains a suitable temperature during marinating and does not solidify, thereby improving the marinating effect. The heat-insulating cylinder effectively prevents heat from escaping, avoiding burns to operators from contact with high-temperature components and improving safety. The sealing structure of the cylinder cover and the configuration of the pressure relief valve balance the internal pressure during closed heating, preventing equipment damage or safety hazards due to excessive pressure.

This invention discloses a high-precision 3D edge reconstruction method for bevel cutting. The method first acquires the original point cloud and grayscale image of the workpiece using a binocular vision system; then, it uses the filtered clean point cloud to fit the plane equation of the workpiece surface as a geometric constraint; next, it performs adaptive feature enhancement on the grayscale image to extract high-precision sub-pixel 2D edges; finally, it combines the plane equation and the 2D edges, calculates the 3D coordinates of the edges using a ray intersection model, and generates the robot cutting trajectory. This invention effectively solves the problems of point cloud loss and distortion caused by edge burrs, defects, and reflections, achieving sub-millimeter-level edge reconstruction and significantly improving the consistency of bevel cutting edges and trajectory accuracy without manual intervention.

This utility model provides a winding mechanism based on a breathable material and a protective film for the substrate, comprising: a winding device; a substrate conveying wheel for winding a substrate onto the winding device, wherein the substrate is provided with a breathable portion; an edge strip conveying wheel for winding two edge strips, wherein the edge strips are disposed in the breathable portion; a substrate conveying wheel for conveying the substrate and disposed at one end face of the substrate; and a protective film conveying wheel for conveying a protective film, wherein the protective film is positioned correspondingly on both sides of the substrate; in the winding state, the substrate conveying wheel, the edge strip conveying wheel, the substrate conveying wheel, and the protective film conveying wheel are conveyed toward the winding device so that the substrate, the protective film, and the edge strips are disposed on the substrate and correspondingly wound onto the winding device; and after processing reset, in the unwinding state, the winding device can reverse the transmission to unwind and separate the substrate, the edge strips, the substrate, and the protective film to the substrate conveying wheel, the edge strip conveying wheel, the substrate conveying wheel, and the protective film conveying wheel respectively.

This invention belongs to the field of emissivity testing and calibration technology in thermal parameters. Specifically, it relates to an emissivity real-time off-site testing device and method, which enables high-temperature emissivity testing equipment to be calibrated in the laboratory in advance and directly calculates the emissivity at different temperatures during field testing. By pre-calibrating the coefficients of the equipment, the emissivity can be directly calculated after testing the sample signal. This method is not only highly accurate but also fast and efficient, solving the problem that high-temperature emissivity testing can only be used in the laboratory and cannot be directly tested and displayed in the field, as well as the problem that it is impossible to quickly and efficiently test the emissivity at all changing temperatures.

The application provides a basalt powder and a basalt fiber reinforced anti-cracking mortar and a preparation method thereof, and belongs to the technical field of cement, concrete and other building materials. The application comprises components of Portland cement, basalt powder, graded sand, basalt fiber, latex powder, cellulose ether and water reducing agent. The application optimizes the compactness of the matrix by filling and reacting with the basalt powder and the pozzolanic ash, and forms a three-dimensional reinforcing network with strong interfacial bonding by using the basalt fiber which is subjected to surface etching and silane coupling treatment. The two components synergistically improve the crack resistance and toughness of the mortar, and the mortar shows a high ductility failure mode with multiple crackings. Meanwhile, the tensile strength, the bending strength and the compressive strength of the mortar are comprehensively enhanced, and the fracture energy is significantly improved. In addition, the high-density matrix and the corrosion-resistant fiber together endow the mortar with excellent impermeability, freeze-thaw resistance and corrosion resistance, and greatly prolong the service life.

This utility model relates to the field of wastewater treatment technology, and in particular to a polyferric sulfate feeding device for wastewater treatment. The polyferric sulfate feeding device for wastewater treatment includes a base plate, a shaking plate, a feeding bucket, a moving edge-adhering mechanism, and a feeding and dispersing mechanism. Locking casters are fixedly installed at the four corners of the lower surface of the base plate, and a push handle is fixedly connected to the outer side of the base plate. The shaking plate is connected to the upper surface of the base plate through an anti-caking mechanism, and the feeding bucket is placed on the upper surface of the shaking plate. The base plate is provided with a moving edge-adhering mechanism that moves in accordance with the wastewater tank, and the upper surface of the base plate is provided with a feeding and dispersing mechanism. This utility model ensures that the polyferric sulfate solution is fully dispersed before entering the wastewater through the feeding and dispersing mechanism, thereby achieving more uniform mixing with the wastewater, better exerting the flocculant's effectiveness, and solving the problem of uneven flocculant liquid dispersion in traditional feeding methods.

A self-cleaning, anti-sticking powder conveying system belongs to the field of powder conveying technology. It includes a receiving hopper with a negative pressure fan at its top. A material passage pipe is installed inside one port of the negative pressure fan, and several guiding mechanisms are installed inside the material passage pipe. A cleaning mechanism is installed on the surface of each guiding mechanism. Through the arrangement of the guiding mechanism, cleaning mechanism, and material passage pipe, powder particles adhering to the inner wall of the pipe can be effectively blown off. Simultaneously, the system automatically removes accumulated dust during operation. Utilizing the interaction between airflow and particle movement, powder particles adhering to the inner wall of the pipe are blown off, and a certain degree of vibration is applied to the inside of the pipe, carrying the particles away with the airflow. This reduces the adhesion rate of powder during conveying, ensuring smooth and stable conveying, thereby improving production efficiency and reducing maintenance costs. The introduction of micro-vibration breaks down powder adhesion forces, reducing blockage.

The utility model relates to the technical field of high -pressure gas cylinder processing discloses clamp for high -pressure gas cylinder processing, including clamp base, locating block and electromagnetic chuck, the upper surface of clamp base is pasted with the lower surface of electromagnetic chuck, the locating block is installed in the middle position of clamp base and electromagnetic chuck side face and connects both, the upper surface of electromagnetic chuck has several electromagnetic blocks along the axial even distribution, several electromagnetic blocks are mutually connected in parallel and are connected with power supply and control switch in common, the utility model discloses to solve the technical problem that traditional high -pressure gas cylinder clamp is easy to produce abrasion in the operation process, in order to restore the machining accuracy, need to replace the clamping part assembly of abrasion regularly to push high production cost and reduce the production efficiency.