139results about How to "Reduce operational complexity" patented technology

This invention discloses a data processing method for unstructured tabular documents, relating to the field of data processing technology. The method includes: obtaining a configuration file; determining the correspondence between each configuration information in the configuration file and the grouping nodes in the grouping information; generating at least two corresponding navigation components based on the first-level grouping nodes; responding to a switching instruction for any navigation component, displaying an interactive interface on a mobile device under the first-level grouping node corresponding to that navigation component, the interactive interface including at least one grouping container, within each grouping container rendering at least one data entry control corresponding to that grouping container, each data entry control containing a field name and a corresponding data entry component; responding to receiving user-inputted data, associating the input data with the corresponding data entry control; and generating a document in its original format containing the input data. This invention improves document filling efficiency and user experience on small-screen mobile devices.

This utility model discloses an integrated hot-melt welding device for automotive sealing strips, relating to the field of automotive parts manufacturing technology. The device includes a worktable, support legs, an adjustment mechanism, and a quick-installation mechanism. The support legs are fixedly mounted on the bottom of the worktable, and an adjustment bracket is fixedly mounted on the top of the worktable. An adjustment mechanism for controlling the mating of the sealing strip is fixedly mounted at the bottom of the adjustment bracket, and a quick-installation mechanism for rapidly installing the mold cavity is fixedly mounted at the top of the adjustment bracket. Through the inclined engagement of the wedge block and roller, and the limiting design of the dovetail groove, a rocker arm drives the pressure plate to quickly press the mold cavity. This dual-fixing mechanism significantly shortens the mold cavity replacement and debugging time, reduces operational complexity, and enhances the installation stability of the mold cavity, adapting to the flexible production needs of multiple sealing strip models, and significantly improving the equipment's versatility and production efficiency.

This invention discloses an online super-resolution imaging method for scanning radar based on the minimization criterion. By establishing an azimuth echo convolution model and discretizing it, the super-resolution problem is transformed. Under a regularization framework, the minimization criterion is used to construct an analytically optimizeable cost function containing sparse prior information, transforming the forward-looking imaging resolution improvement problem into an optimization estimation problem. By dividing the antenna measurement matrix into rows and blocks, matrix operations are degraded into the continuous accumulation of vector operations, enabling real-time online updates of targets in the forward-looking region. Finally, the conjugate gradient method is used to degrade and invert the matrix, outputting the super-resolution result. This method can achieve rapid imaging with limited system memory through an online conjugate gradient super-resolution algorithm based on the minimization criterion. Compared with existing batch processing regularization methods, it eliminates false targets, significantly reduces computational complexity, and is beneficial for rapid imaging of scanning radar.

A kind of detection method and device of fake APP, terminal, the method includes: determining training data;Keyword extraction is carried out to the brief introduction of each pair of target APP and the brief introduction of suspected APP, and the data vector of each keyword is determined;Determine the weight value of each keyword, and the data vector of each keyword in the target APP is weighted based on the weight value Operation is carried out to obtain target APP data vector, and obtain suspected APP data vector;The vector comparison result of target APP data vector and suspected APP data vector is calculated, the absolute value of the vector comparison result is determined as first data vector, and the square of the vector comparison result is determined as second data vector;Obtain the training text vector of the pair of target APP and suspected APP;Training fake detection model.The present application can enhance the association between keywords in model training phase, reduce the misjudgment rate.

This utility model belongs to the field of shared power bank technology, specifically relating to a voice-interactive shared power bank. The shared power bank's outer shell incorporates interactive and fixing components, integrating intelligent interaction and convenient charging. The interactive components include a waterdrop screen, a voice interaction module, and a network module, enabling voice-guided rental and cabinet location via a cloud database. The waterdrop screen, combined with a recessed button, supports reading during power outages. A wireless charging coil and magnetic plate provide magnetic fast charging for easy operation. The fixing component adopts an L-shaped structure, using a combination of T-slots, silicone strips, and rotating blocks to securely hold the phone when the user moves. The outer shell has a speaker hole and charging port on the side, an input interface on the bottom, and anti-collision pads on opposite sides to cushion impacts, enhance stability, and ensure the device's safety and durability.

The utility model relates to a kind of shock absorption technology technical field, concretely relates to a kind of vibrating screen rubber shock absorbing spring. Including by a plurality of compression unit series into one's body shock absorber, shock absorber upper end is fixed with upper sleeve, upper sleeve upper portion is internally machined with internal thread, upper sleeve lower end is internally machined with four edge hole, shock absorber lower end is fixed with lower sleeve, lower sleeve is slidably provided with connecting rod, connecting rod penetrates lower sleeve, connecting rod upper end is fixed with four edge head, four edge head can be connected in four edge hole after going up, connecting rod lower end is machined with four edge block. By the four edge head of connecting rod top and the clamping design of the four edge hole of upper sleeve, rigid fixation of upper sleeve is realized in bolt tightening process. This structure can effectively offset the torque generated when bolt rotates, avoid the deformation or damage of rubber shock absorbing spring due to stress distortion, while ensuring axial centering during threaded connection, greatly improve installation efficiency.

This invention belongs to the field of additive-subtractive composite manufacturing technology, and discloses a five-axis linkage additive-subtractive composite machine tool and control system. The machine bed base assembly has left and right guide rail seats symmetrically fixed on both sides of its top. The worktable is fixed in the middle of the machine bed between the two guide rail seats. An integral crossbeam is mounted across the top surface of the left and right guide rail seats and can move linearly along the X-axis. Two independent machining units are mounted in parallel along the Y-axis on the integral crossbeam: the subtractive side crossbeam slide plate carries a subtractive slide block and a subtractive electric spindle actuator, and the additive side crossbeam slide plate carries an additive Z-axis slide table and a double-swing additive head. The worktable is divided along the X-axis into a subtractive-specific machining area, a composite machining area, and an additive-specific machining area. The two machining units can operate independently in their respective dedicated areas, or enter the composite machining area at different times to collaboratively complete the additive-subtractive composite machining. This invention combines high structural rigidity with machining flexibility, avoids secondary workpiece clamping errors, and significantly improves machining efficiency and accuracy.

This invention relates to the field of cable aluminum foil coil processing technology, and particularly to an integrated equipment and method for forming and coating cable aluminum foil coils based on a conical mold. The equipment includes a transport frame and coating wheels. A mold range adjustment mechanism is provided on the outer side of the transport frame, and a position adjustment mechanism is provided on the outer side of the conical mold range adjustment mechanism. The conical mold range adjustment mechanism includes a rotating column, a stabilizing plate fixedly connected to the top of the rotating column, and a conical mold piece on the top of the stabilizing plate. A fixing rod is fixedly connected inside the rotating column, and a movable tube is fixedly connected to the outer side of the fixing rod. In this invention, by adjusting the speed of a primary motor to change the range between the conical mold pieces, and in conjunction with the synergistic effect of the position adjustment mechanism, precise adjustment of the mold range and position can be quickly completed without the need for separate forming and coating processes, reducing equipment space requirements and process connection time.

The utility model relates to the technical field of hairdressing equipment, in particular to a rotary adjustable hair curling rod which comprises a shell, a hair curling assembly, a rotary shifting piece and an upper limiting block. The gear set of the rotary base is meshed with the driven gear, and the second gear teeth of the rotary shifting piece are meshed with the gear set, so that accurate rotation control over the curling iron is achieved, the curling angle and the curling direction can be adjusted more flexibly and stably, the curling effect and the user experience are improved, and the practicability is high. The heating piece is guided through the first moving guide rail and the second moving guide rail, the stability and accuracy of the heating piece in the hair curling process are guaranteed, the problems that a traditional hair curling rod is uneven in heating and unsmooth in hair curling are solved, the hair curling quality is effectively improved, and the upper limiting block and the top cover improve the structural stability of the hair curling rod and improve the hair curling efficiency. And in addition, the use safety is improved, the heating piece is prevented from accidentally falling off or shifting, and safer and more reliable use experience is provided for a user.

The present specification relates to the technical field of fiber-optic gyroscopes, and discloses a reciprocal structure 3x3 fiber-optic gyroscope and a use method thereof, to solve the problems of poor anti-interference, complex calculation, and no consideration of the influence of temperature change on test results, poor environmental adaptability, and limited practicality of a typical non-reciprocal structure 3x3 fiber-optic gyroscope; three photoelectric detectors, a 2x2 coupler, a 3x3 coupler, a temperature sensor, and a signal processing module; the 2x2 coupler, the 3x3 coupler, the first photoelectric detector D1, the second photoelectric detector D2, and the third photoelectric detector D3 constitute a reciprocal structure 3x3 fiber-optic gyroscope optical path. The reciprocal structure 3x3 fiber-optic gyroscope extracts a reciprocal end output signal, uses the reciprocal end output signal as a reference quantity for differential demodulation, eliminates the influence of optical path loss variation and light source fluctuation on the gyroscope output signal, and greatly improves the anti-interference of the gyroscope system.

The application relates to the storage field and relates to an automatic configuration method of a RAID array card and a configuration system thereof. The application solves the problems that the RAID array card cannot be preconfigured in the prior art, and the manual configuration process is prone to misoperation and high in labor cost. The application comprises the following steps: saving the default automatic creation virtual disk and configuration data of the RAID array card in a serial peripheral interface flash memory; setting two M.2 SSD system disks of the same model and capacity and a microprocessor MCU in the RAID array card; setting a trigger automatic configuration under the condition that hardware requirements and trigger time are met through a configuration management module responsible for executing an automatic configuration process; realizing the automatic configuration of the RAID array card; greatly reducing the complex operation of manual creation of the user, reducing the consideration of human error, and putting forward the demand for automatic configuration of the RAID, which is realized through the automatic configuration, so as to achieve the purpose of being used as soon as powered on.

The application discloses an LED display control card and a display device, the display control card comprising: a data processing module having a video and image processing unit and an audio processing unit; a video input interface for receiving an external video signal, the video input interface being connected with the video and image processing unit; a first output interface for connecting an LED display screen; a timing control module connected between the data processing module and the first output interface, the timing control module being used for providing a driving signal to the LED display screen; a microprocessor connected with the data processing module and the timing control module; wherein, the microprocessor pre-stores parameter configuration information of the LED display screen corresponding to the LED display control card, and the data processing module and the timing control module process the video signal according to the parameter configuration information to form a required driving signal to drive the LED display screen. The display control card and the display device of the application are not only low in cost, but also compatible with various third-party devices, meeting the requirements of various scenes.

This invention discloses an efficient QR matrix decomposition method based on FPGA for implementing systolic matrices, belonging to the field of software-defined radio signal transmission technology for airborne networks. It is based on the design of a multi-channel digital front-end implemented on an FPGA chip. The method includes: designing a general handshake coordination mechanism, designing a timing flow for systolic matrix multiplication, performing fast QR matrix decomposition single-loop operations by calculating the Householder mirror transformation matrix, designing a top-level loop pipeline for QR matrix decomposition, and finally verifying the hardware scheme of the fast QR decomposition algorithm. This invention converts resource consumption into timing consumption by designing the overall pipeline logic and loop operations, enabling fast processing and accurate decomposition of digital information in a multi-channel digital front-end on an FPGA, effectively saving on-chip resources. In addition, this invention has excellent scalability, supporting 64 to 128-bit high-precision fixed-point number formats, and the data matrix order can reach up to 128.

This utility model discloses a processing device for producing oil pipes for automotive parts, relating to the field of automotive parts processing technology. It includes an operating table, with an adjusting telescopic rod fixedly connected to one side of the operating table's interior. The adjusting telescopic rod is fixedly connected to a fixing component, which is slidably connected to the operating table. A limiting frame is fixedly connected to the side of the operating table away from the fixing component. A feeding component is rotatably connected to the limiting frame, and a cutting component is fixedly connected below the feeding component. A cooling nozzle is fixedly connected to one side of the feeding component, and the cooling nozzle is connected to a collection box via a connecting pipe. The collection box is fixedly connected below the operating table. A filter screen is disposed below the limiting frame and fixedly connected to the operating table. A cleaning component is slidably connected to the filter screen. This utility model offers high processing precision. Through the cooperation of the fixing component and the cutting component, stability during cutting is ensured, guaranteeing processing accuracy.

This invention discloses a UAV-GPR noise suppression and imaging method and apparatus based on Hankel trajectory matrix decomposition, belonging to the field of ground-penetrating radar technology. The method first preprocesses the radar echo data and constructs a Hankel-block-Hankel trajectory matrix, achieving noise suppression through singular value decomposition and adaptive truncation and reconstruction based on a quasi-local curvature metric. Then, the derivative threshold reference point method is used to accurately extract the arrival time of surface reflections from the noise-suppressed data, thereby estimating and correcting flight altitude variations. Next, singular value decomposition based on a distance threshold is applied to suppress surface reflections in the altitude-corrected data. Finally, a time-delay summation imaging method based on refraction point approximation in a two-layer medium model is derived, and the filtered data is focused and imaged using the average flight altitude. This invention achieves accurate detection and location of underground targets.

The application relates to the technical field of unmanned aerial vehicles, in particular to a fixed-wing unmanned aerial vehicle ejector. The ejector comprises a first fixing base, a second fixing base, a slide rail and a load slide carriage; the second fixing base is arranged at intervals from the first fixing base, and the second fixing base is provided with a first lock catch assembly; the slide rail is connected with the first fixing base and the second fixing base at two ends respectively; the load slide carriage is in sliding cooperation with the slide rail, the load slide carriage is provided with a second lock catch assembly, the second lock catch assembly is connected with the first fixing base and the second fixing base through first elastic elements and second elastic elements respectively, and the load slide carriage is used for placing an unmanned aerial vehicle; wherein the load slide carriage can be locked with the second lock catch assembly, the first elastic elements can enable the unmanned aerial vehicle to be limited by the second lock catch assembly, and the second elastic elements can elastically release the limitation of the second lock catch assembly on the unmanned aerial vehicle. The application can realize stable ejection of the unmanned aerial vehicle and can be suitable for unmanned aerial vehicles of various models.

The application discloses a probability shaping log likelihood ratio acquisition method, supports probability shaping log likelihood ratio calculation of non-MB distribution, can be used for non-linear channel performance optimization, can be compatible with LLR calculation of MB distribution probability shaping, uniform distribution and part of low-order modulation, has low circuit operation complexity, supports multi-functional merging design, can be realized by using the same circuit, reduces hardware cost compared with multiple independent realizations, when the probability distribution is known, probability value calculation is directly used, and there is no need to convert a shaping factor or to look up a shaping factor, and the method can work in a normal signal-to-noise ratio range and does not need to meet a higher signal-to-noise ratio condition. The application further provides a corresponding probability shaping log likelihood ratio acquisition device.

The utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter relates to diaphragm filter technical field, the utility model discloses a diaphragm filter related to diaphragm filter technical field, the utility model discloses a diaphragm filter relates through setting installation part, has solved the diaphragm filter of existing in the use process, is not convenient for assembly and disassembly, leads to equipment installation and maintenance time -consuming and labor -intensive, still can because the cumbersome influence of dismounting process the timeliness of replacing diaphragm, and then reduces the problem of filtration efficiency and the continuous operation ability of equipment.

A multi-channel integrated device testing system and method includes hardware devices and a PC testing tool. The hardware devices include a USB interface, a wired network interface, a wireless communication module, a Bluetooth module, I / O ports, buttons, and a solid-state system. The USB interface, wired network interface, wireless communication module, Bluetooth module, I / O ports, and buttons are used to establish electrical connections and data interaction paths with a development board. The solid-state system runs on the development board and controls each interface through a driver program, completing the overall functions of signal acquisition, data communication, and peripheral management. The PC testing tool includes a connection management module, a device discovery module, a test execution module, a result processing module, a status configuration module, and a Bluetooth interaction module. This system supports multiple connection methods, integrated testing functions, precise device selection, flexible configuration of judgment criteria, and deep Bluetooth testing capabilities, enabling efficient and stable automated device testing.

This utility model discloses a semi-disposable contactor, comprising a contactor body and a semi-shell. The contactor body includes an arc-extinguishing shield, magnetic pole pieces, and a yoke. The arc-extinguishing shield and the yoke are fixed to the upper and lower sides of the magnetic pole pieces, respectively. The semi-shell covers the outside of the arc-extinguishing shield and does not obscure or partially obscure the yoke. The semi-shell is provided with a first latch for engaging with the magnetic pole pieces or the yoke, thereby fixing the semi-shell to the contactor body. This utility model, through a rational design of the structure of the semi-shell and the contactor body, significantly reduces the overall volume compared to traditional high-voltage DC contactors, facilitating the high integration of the BDU. Simultaneously, the first latch on the semi-shell allows it to engage with the magnetic pole pieces or the yoke, fixing the semi-shell to the contactor body and improving installation stability and convenience, reducing complex operations during assembly, and contributing to increased production efficiency.

The application provides a virtual role control method and device, electronic equipment and a readable storage medium. A graphical user interface is provided through a terminal device. In response to a crosshair moving operation on the terminal device, the crosshair is aimed at a target virtual role. In response to a pressing operation on a virtual control, the crosshair is locked to the target virtual role. In response to a sliding operation on the virtual control, a first operation or a second operation is executed based on the sliding direction of the sliding operation. The first operation represents controlling a player virtual role controlled by the terminal device to move towards the target virtual role, and the second operation represents controlling the target virtual role to move towards the player virtual role. The movement of the player virtual role and the dragging of the target virtual role are realized through one virtual control, which can reduce the operation complexity, enhance the playability and interest of the game, improve the experience of the player, integrate virtual controls with different functions, and reduce the screen information bearing pressure of the terminal device.

This invention discloses an artificial intelligence-based constant temperature and humidity fermentation system for tea, comprising a global perception and data acquisition layer, an AI decision-making and digital twin layer, a precise execution and control layer, and a management and interactive presentation layer. The global perception and data acquisition layer is used to collect multi-dimensional data from the fermentation environment and the tea itself in real time. The AI ​​decision-making and digital twin layer is used to fuse and analyze the collected data, construct a virtual fermentation model, and generate optimized control strategies. The precise execution and control layer is used to distribute the control strategies generated by the decision-making layer to various actuators and drive their actions. The management and interactive presentation layer provides system configuration, process monitoring, model management, and visual interactive functions. This invention relates to the field of intelligent tea processing equipment technology. This system can achieve adjustments from environmental control to quality process control, thereby completing real-time perception, intelligent diagnosis, dynamic optimization, and endpoint determination of the fermentation state.

This utility model discloses an auxiliary device for measuring train wheel axles and wheelsets, relating to the field of train wheel axle and wheelset measurement. It includes a base assembly, a lifting assembly, and a centering assembly. The base assembly includes a base, a lifting assembly mounting plate, and a centering assembly mounting plate. The lifting assembly mounting plate is fixedly installed at the inner center of the base, and the centering assembly mounting plate is fixedly installed on the upper part of the base, located outside the lifting assembly mounting plate. This auxiliary device for measuring train wheel axles and wheelsets, through its unique design and technical solution, achieves precise positioning, secure fixing, and efficient measurement of train wheel axles and wheelsets. This device not only significantly improves measurement accuracy and efficiency and reduces operational hazards, but also brings significant economic benefits and convenience to enterprises through its universal design and ease of maintenance.

This application provides a control method, device, storage medium, and computer program product for a simulated robot's dual arms. It includes: receiving initial control commands for the robot's dual arms in a simulated environment; acquiring in real-time motion speed signals from the robot's end effector and contact pressure signals from the gripping mechanism; determining the current operation stage based on real-time signal changes, where the operation stage includes a movement stage, a grasping stage, and a placement stage; calling a corresponding preset weight parameter set according to the operation stage to adjust the response sensitivity to the initial control commands; wherein the preset weight parameter set includes at least one position sensitivity parameter and one rotation sensitivity parameter, and different values ​​for the position sensitivity parameter and rotation sensitivity parameter are configured for the movement stage, grasping stage, and placement stage respectively; and processing the initial control commands based on the position sensitivity parameter and rotation sensitivity parameter to generate joint or end effector motion commands for the robot.

The application discloses a database script deployment method and device and a computer readable storage medium. The method comprises the following steps: determining a database unique identifier according to a received database script deployment request; determining a current environment type and database connection information according to the database unique identifier, and connecting a target database instance corresponding to the current environment type based on the database connection information; obtaining a control file and a to-be-deployed script associated with the target database instance from a code repository, and determining a deployment sequence and a deployment mode corresponding to each to-be-deployed script according to the control file; and executing each to-be-deployed script according to the deployment sequence and the deployment mode. The database script deployment efficiency is improved.

This invention proposes an online correction method and system for sine and cosine signals of a rotary transformer, relating to the technical field of servo control. The method involves fitting the demodulated original sine and cosine signals using second-order polynomial functions to obtain second-order sine and cosine polynomial expressions, respectively. The term matrix and the parameter matrix to be optimized are then extracted to obtain the sine and cosine matrices. Based on these matrices, a sine and cosine correction error function is constructed. With the goal of minimizing the sine and cosine correction error function, the method uses the parameter matrix to perform online iterative solutions, thereby completing the online correction of the rotary transformer's sine and cosine signals. This method has low computational complexity and short processing time. Compared to directly decoding uncorrected sine and cosine signals, it improves the linearity of the subsequent decoding angle and reduces decoding speed fluctuations.

The utility model discloses a device of reinforcing bar spacing control relates to reinforcing bar spacing control field, including the measuring frame, the inside rotatory connection of measuring frame has two -way screw rod, both sides of two -way screw rod's outer surface all rotatory connection has the screw part, the lower extreme of screw part is provided with the positioning assembly, and the inside of screw part and measuring frame mutually sliding plug -in. The utility model adopts above -mentioned structure, and the scale on both sides of the measuring channel of measuring frame upper end measures, can intuitively read the distance between both sides screw part, thereby completes the spacing measurement between reinforcing bar, realizes both sides positioning assembly synchronous regulation through two -way screw rod drive, need not adjust respectively, and the positioning and measurement time are greatly shortened, and the operation complexity is reduced, and the high measurement precision of screw regulation, and two -way screw rod transmission displacement is stable, and the accurate scale of cooperation scale can reduce manual positioning and reading error, and ensure that the measurement result is accurate.

The utility model provides a kind of bed patient foot cleaning auxiliary device, including popliteal fossa support block, foot bath basin and waterproof pad, and installation port for sealing installation foot bath basin is opened in waterproof pad, waterproof pad is in the peripheral position of installation port and is expanded funnel-shaped structure, the bottom end of waterproof pad is equipped with first support air bag in the periphery of installation port, popliteal fossa support block is bonded in the top end of waterproof pad. Foot bath basin and waterproof pad are detachably sealed and connected to form closed waterproof structure, effectively prevent cleaning liquid from leaking to bed sheet;First support air bag can support foot bath basin, the bonding design of popliteal fossa support block and waterproof pad can be adjusted position according to the body type of patient, without moving patient, foot cleaning can be completed, avoid the hidden danger of pipe distortion, falling off and falling due to moving;Foot bath basin is detachably installed and convenient to clean, and overall structure is convenient to curl and store, suitable for clinical and home nursing scene, improve nursing efficiency and patient comfort.

The utility model relates to prefabricated box culvert lifting appliance technical field, especially prefabricated box culvert lifting appliance, including main girder, both ends of main girder are slidably provided with hook leg, both sides of hook leg are hinged with connecting rod, and the one end away from hook leg of connecting rod is connected with lifting hook through hinge shaft, and the hinge shaft is provided with on -off device, and the main girder is provided with the clamping groove with on -off device cooperation, and the inside of hook leg is slidably provided with crossbeam along the vertical direction, be provided with locking mechanism between crossbeam and hook leg, and the both ends of crossbeam are provided with telescopic link along the horizontal direction. Through setting up the hook leg of sliding, the connecting rod of hinging and the lifting hook, cooperate the design of on -off device and clamping groove, can realize the convenient opening and closing and the fixation of lifting hook, need not to pass through prefabricated box culvert with sling, greatly simplify hoisting operation process, the crossbeam of sliding in hook leg and locking mechanism, in combination with telescopic link of crossbeam both ends, can adjust according to the size of prefabricated box culvert, effectively improve the adaptability and stability of hoisting, significantly improve work efficiency, reduce the operation complexity and labour intensity.

This invention discloses a method for preparing high-purity carbazole alkylphosphonic acid derivatives, specifically a method for preparing high-purity MeO-2PACZ, 4PADCB, Me-4PACZ, and 2PACZ. This invention simplifies the post-reaction processing flow and employs a specific preparative chromatography combined with lyophilization for purification, achieving a product purity ≥99.0%. When used in the fabrication of perovskite solar cells, the products show a significant improvement in photoelectric conversion efficiency. Furthermore, the process is highly automated and easier to operate, directly adaptable to large-scale industrial production, meeting the high-purity application requirements of core functional materials for high-efficiency perovskite photovoltaic devices.