184results about How to "Efficient development" patented technology

The invention discloses a zero-code development platform and method, electronic equipment and a medium, and belongs to the field of software development. The zero code development platform comprises a data protocol layer, an equipment layer, an operator and module library, a business logic layer and an application layer, the data protocol layer manages an industrial control protocol and a database system; the equipment layer accesses and manages hardware resources; the operator and module library provides a function operator, a resource component operator and an HMI module for calling; the business logic layer calls operators and modules in a module library in a graphical mode through a designer to construct a business task process; and the application layer provides a running environment for the business process and executes the process. According to the zero-code development platform, the development method, the electronic equipment and the medium provided by the invention, efficient development and management of complex industrial automation applications can be realized through a multi-layer architecture design, the overall performance of a system and the development experience of a user are improved, the development process is simplified, and the development period is shortened.

The invention discloses a distributed architecture of an intelligent emergency command and dispatch system and a collaborative decision-making method. A distributed architecture comprising a basic resource layer, a support service layer and an application layer is constructed, and functions of multi-type alarm access, accurate alarm positioning, intelligent power dispatching and the like are realized by using multiple technologies. And establishing a collaborative decision-making mechanism which covers problem modeling, communication protocol design, negotiation mechanism development, dynamic adjustment and decision-making execution. The system is deployed after integration testing and security testing, personnel training, daily hardware maintenance, software monitoring, data backup and security component updating are carried out. The emergency commanding and dispatching efficiency, accuracy and collaboration are improved, the method adapts to complex emergencies, and public safety is guaranteed.

The invention relates to the technical field of plug seedling transplanting equipment, in particular to transplanting equipment for plug seedling and a fixed-depth transplanting method. The transplanting equipment comprises a walking mechanism, a rack, a seedling taking and feeding device, a circulating feeding mechanism and a planting mechanism, the seedling taking and feeding device, the circulating feeding mechanism and the planting mechanism are installed on the rack, an adjusting assembly used for adapting to land fluctuation on a planting belt is arranged between the walking mechanism and the rack, and a detection plate of the adjusting assembly is connected with a frame body of the walking mechanism through a rotating shaft; the angle sensor is used for collecting a rotation angle formed by rotation of the detection plate along with land fluctuation on the planting belt, and the control module is used for receiving the rotation angle, calculating a height change value of the land fluctuation on the planting belt according to the rotation angle, and controlling the execution component to drive the rack to move according to the height change value so as to compensate the planting depth. The transplanting equipment for plug seedling culture is adaptive to land fluctuation on a planting belt, the consistency of seedling planting depth is improved, and the planting effect is improved.

The invention discloses a carbon dioxide pressure flooding oil displacement and burying numerical simulation technical system, and relates to the field of CCUS numerical simulation, and the technical system comprises a geological data obtaining module which obtains the geological data of a target oil field site; an oil reservoir geologic model construction module constructs an oil reservoir geologic model in the CO2 pressure drive process of the deep shale oil reservoir according to the geological data; the pressure-drive oil displacement and burying mathematical model building module is used for building a deep shale oil reservoir CO2 pressure-drive oil displacement and burying mathematical model on the basis of the multiphase multicomponent seepage model and the mechanical deformation model in combination with the reservoir damage mechanical constitutive model; and the pressure-drive oil displacement and burying numerical simulation module is used for solving the seepage equation and the mechanical equation, carrying out iterative coupling solution on the fluid-solid two fields based on a definite stress decomposition algorithm, carrying out deep shale oil reservoir CO2 pressure-drive oil displacement and burying numerical simulation, and can better simulate the porosity and permeability change and the evolution of a damaged area in the CO2 pressure-drive oil displacement and burying process.

The invention relates to a commanding height analysis method and system based on double spatial indexing, and the method employs a double index construction method through an index construction link, i.e., constructing double indexes of a tile quadtree and a triangular patch K-D tree, thereby achieving the quick positioning of a triangular patch intersecting with a ray in a live-action three-dimensional model. By means of the powerful operational capability of a computer, potential hidden danger commanding height points along the security and protection route can be accurately found, the commanding height point calculation efficiency is greatly improved, the practical feasibility of completing large-scale commanding height point calculation based on a live-action three-dimensional model is enhanced, and security and protection work is promoted to be developed more scientifically and efficiently.

The invention relates to the technical field of new materials, in particular to a dot matrix composite origami structure based on a hierarchical strategy and a preparation method thereof, the dot matrix composite origami structure comprises a plurality of dot matrix cell elements, and the dot matrix cell elements are periodically arrayed in three mutually perpendicular coordinate axis directions based on the origami structure to form a closed geometrical shape. The method has the beneficial effects that the dot matrix structure is mapped into the paper folding structure, integration of the advantages of dot matrix design and paper folding design is achieved, the overall mechanical property of the structure is further improved, and the coverage range of the overall performance of the structure is expanded. The characteristics of paper folding and lattice structures are integrated, and a composite structure with controllable overall rigidity is designed, so that the composite structure has better vibration and noise reduction characteristics.

The application provides a low-grade oil reservoir water injection development effect evaluation method, comprising the following steps: S1, collecting core scale limit oil displacement efficiency data; S2, collecting well pattern controlled reserve degree data; S3, calculating sweep efficiency of the low-grade water drive oil reservoir; S4, correcting the sweep efficiency according to the changes of reservoir physical property parameters caused by near-well pollution and reservoir energy decline; and S5, calculating the reference recovery rate and evaluating the development effect. The application can effectively avoid collecting and arranging a large number of cumbersome production dynamic data, fully utilize the flow characteristics and dynamic physical property parameter evolution of the low-grade oil reservoir, accurately evaluate the development effect of the low-grade oil reservoir, and be beneficial to efficient development of the low-grade oil reservoir.

The invention belongs to the technical field of thickened oil development, and particularly relates to a displacement exploitation method with controllable thickened oil activity. According to the displacement mining method with the controllable heavy oil activity, firstly, fracture development condition analysis is conducted on oil reservoir crude oil reserves, then different slugs are adopted for heavy oil mining according to the fracture development condition, and a water plugging agent, a composite viscosity reducer and a CO2 synergistic huff and puff mode and a CO2 response type alkyl amidine surfactant are adopted in the different slugs; the plugging agent can generate good water channeling plugging, viscosity reduction, gas channeling plugging and other effects, has good oil displacement capacity, can greatly improve the recovery efficiency, and is suitable for heavy oil recovery under harsh conditions.

The invention belongs to the technical field of voice signal processing, and discloses a method and system for driving a virtual human by a voice signal, and the method comprises the steps: carrying out the resampling processing of original audio signal data, obtaining a voice signal, solving a linear prediction coefficient based on a dynamic framing strategy and a linear prediction analysis technology, and obtaining a linear prediction result; obtaining a voice feature sequence of the voice signal; performing enhancement processing on the voice feature sequence by using a dynamic feature enhancement technology, obtaining an enhanced feature sequence based on a processing result, and constructing an animation sequence prediction model by taking the enhanced feature sequence as input; and obtaining animation sequence parameters based on an output result of the animation sequence prediction model, and combining the animation sequence parameters with the virtual human role model to perform facial action synthesis and rendering operation. According to the invention, the earlier stage processing flow is greatly simplified, and the usability and applicability in the driving process are improved.

The invention discloses an automatic fusion method for a large-scale framing map, and the method comprises the following steps: S1, training an image segmentation model, so as to achieve the extraction and segmentation of a map region; s2, registering a graphic area calibrated by the image segmentation model, and restoring the graphic area into a map image of a standard sheet; and S3, determining the position sequence of different framing pictures in the full-width map, splicing a large number of framing pictures, and finally splicing to form the full-width map. According to the method, the automatic fusion of the framing maps in a large-scale scene is realized, the splicing process of the framing maps is remarkably simplified through automatic operation, a large amount of manual operation is reduced, manpower is saved, and the splicing efficiency is greatly improved.

The invention discloses a digital human rapid development method and system, electronic equipment and a storage medium, and relates to the field of digital human development. In the method, when a first figure demand and a first scene demand are received, a first appearance feature and a character feature are determined according to the first figure demand, and a second appearance feature and a preset function are determined according to the first scene demand; constructing a first digital person according to the first appearance feature, the second appearance feature, the character feature and a preset function; constructing an activity scene and a test situation according to the first scene demand, wherein the test situation comprises a trigger condition, an interaction object and an expected result; and training the first digital person according to the test situation to obtain a second digital person. By implementing the technical scheme provided by the invention, the effect of quickly developing the digital human capable of dealing with complex scenes and emotional interaction is achieved.

The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing low-stress high-entropy alloy design system and method based on lattice mismatch, which are used for effectively reducing interface stress of gradient materials, and the method comprises the following steps: analyzing a matrix crystal structure, and determining a high-entropy alloy crystal structure type consistent with the matrix crystal structure; based on a high-entropy alloy crystal structure, a high-entropy alloy virtual lattice approximate structure model is established; performing structure geometric optimization on the model to obtain a high-entropy alloy lattice constant under a stable structure; according to the obtained lattice constants, the proportion of all elements of the high-entropy alloy is adjusted by comparing the lattice constants of the base body, and the redesigned high-entropy alloy is calculated till the lattice mismatch degree of the high-entropy alloy and the base body is low; and gradient design is conducted on the designed high-entropy alloy with the low lattice mismatch degree and the base body, and the design result of the low lattice mismatch degree and the low interface stress of the additive manufacturing high-entropy alloy gradient material is obtained.

The invention belongs to the field of molecular genetic breeding, and particularly relates to a KASP molecular marker method related to peanut aspergillus flavus seed kernel infection resistance and application of the KASP molecular marker method. Through whole genome association analysis, the SNP locus is located at the 133198521th bp position of the peanut B06 chromosome (the reference genome is peanut), the nucleotide sequence polymorphism is C / A (the antisense strand is G / T), and the SNP locus is named as qARIB06. Based on the SNP site, KASP molecular marker primer sequences (SEQ ID NO.1, SEQ ID NO.2 and SEQ ID NO.3) are designed and developed, and the KASP molecular marker primer sequences are used for rapidly and accurately identifying the genotype of a peanut sample.

The invention discloses a water hammer analogue simulation method and device for fracturing, and belongs to the technical field of oil and gas reservoir fracturing exploiting.The simulation method comprises the steps that a simulated shaft is determined; establishing a water hammer continuity equation and a water hammer motion equation based on the water head, the flow, the fluid density and the like; establishing a water hammer equation set by combining a liquid elastic equation combination, and solving to obtain a distribution equation of the water head, the flow velocity and the density; establishing a relational expression of fluid pressure, density and flow, and establishing a water hammer equation set in parallel to obtain a water hammer simulation model; initial conditions and boundary conditions are set, and a curve of water hammer pressure changing along with time is obtained through fitting. The device comprises a memory for storing a computer program and a processor, wherein the program comprises the steps corresponding to the method. According to the method, the water hammer pressure in the fracturing process can be more accurately simulated, developers are helped to analyze the fracturing effect by using the water hammer pressure in the fracturing process, so that fracturing parameters are optimized, a better fracturing effect is obtained, and efficient development of unconventional oil and gas resources is promoted.

The invention relates to a crustal stress prediction method, device, equipment and medium for a complex fault zone, and belongs to the technical field of oil-gas field development, and the method comprises the steps: calculating rock physical parameters of the complex fault zone according to a rock physical parameter calculation formula; calculating rock mechanical parameters of the complex fault zone according to a rock mechanical parameter calculation formula; reconstructing the logging curve of the complex fault zone to obtain a reconstructed logging curve; and predicting the crustal stress of the complex fault zone through a three-dimensional crustal stress model in combination with the reconstructed logging curve, the rock mechanical parameters and the rock physical parameters. According to the scheme, the logging curve of the complex fault zone is reconstructed, the reconstructed logging curve is obtained, and data missing or distortion is made up. According to the method, the application bottleneck of a traditional method under the complex geological condition of the ultra-deep oil and gas reservoir is broken through, the prediction precision is remarkably improved, and technical support is provided for safe and efficient development of the ultra-deep oil and gas reservoir.

The invention relates to the technical field of agricultural mechanization, and discloses a variable-variable and variable-width fertilizer spreader, which comprises: a cabinet, the bottom of which is provided with a crawler belt for moving the device; the collecting mechanism is mounted in the cabinet and used for releasing and collecting the rope for moving; the fixing mechanisms are mounted on the two sides of the cabinet and used for fixing the position of the cabinet; the fertilizer spreading mechanism is mounted on one side of the cabinet and is used for spreading a fertilizer; the stirring mechanism is mounted in the fertilizer spreading mechanism and is used for mixing the fertilizer; the bundling mechanism comprises a rope winding disc, and the rope winding disc rotates in the machine cabinet. The moving path and stability of the equipment are controlled through the rope conveying mechanism, the phenomenon of uneven fertilization caused by equipment displacement is avoided, the system design not only protects the soil structure, but also provides a good growth environment for crops, promotes development of root systems and effective absorption of nutrients, and finally facilitates improvement of the yield and quality of the crops.

The present invention provides a method for evaluating the effective transformation volume of multi-scale artificial fractures, comprising: step 1, calculating the fracture conductivity according to parameters such as proppant type, sand concentration, proppant density and crushing rate; step 2, establishing a multi-medium seepage mathematical model, performing numerical solution, and obtaining a flow field for tight reservoir fracturing development considering the starting pressure gradient; step 3, calculating the normal inflow velocity of the fluid in the fracture; step 4, establishing a method for identifying the effective length of a single fracture; step 5, calculating the effective transformation volume coefficient of multi-stage fracturing; step 6, obtaining the effective transformation volume of the fracture network on the basis of obtaining the effective transformation volume coefficient. The method for evaluating the effective transformation volume of multi-scale artificial fractures can obtain the relationship between different proppant particle sizes, sand ratios, fracture complexity and other parameters and the effective transformation volume, and then optimize these parameters to guide efficient development on site.

The present invention discloses a digital asset management system, including a user layer, a network layer, an application layer, a service layer, a data layer and a resource layer; wherein the user layer is used to provide a terminal to upload data to be processed; the network layer is used to provide network parameter settings, and the network parameters include API gateway authentication, black and white list restrictions, access frequency control, and unified authentication of user information; the application layer is used to carry out department classification management, operation management and supervision management of various types of assets, and realize data visualization; the service layer is used to carry out general component services, including one-picture application, ETL service, and spatial data storage service; the data layer is used to set up a business database, a spatial database, and a file storage database; the resource layer is used for computing, storage, and network architecture resource services. The present invention creates an innovative digital management model of "one account for assets, one screen for management, and one picture for layout", realizes the full-cycle management of assets, and improves the efficiency of management.

The invention provides a helicopter model demand allocation and tracking method, and the method comprises the following steps: defining a demand management information architecture and a demand allocation structure based on a helicopter model demand decomposition structure (RBS); according to a helicopter model product decomposition structure (PBS) definition, demand definition of each level system of a PBS is carried out, and demands are uniquely identified and entries are carried out; carrying out demand allocation on demands of each level system of the PBS, and completing demand allocation to each specialty of a model I PT team through demand allocation attribute definition; according to a helicopter model demand decomposition structure, establishing a demand link of each level system of the PBS, and forming a demand tracing matrix; and based on the demand tracing matrix, carrying out whole-process tracking on the demands of all levels of PBS systems.

The invention discloses a preparation method of a self-supporting three-dimensional electrocatalyst with an adjustable pore structure and ordered metal distribution. The method is divided into the following two methods according to different adding steps of metal nanoparticles or metal precursors: the method I comprises the following steps: 1) preparing a porous organic polymer by adopting an ice template method; 2) dissolving a metal precursor in an ethanol solution at room temperature, mixing with the porous organic polymer carrier, and standing until ethanol is completely volatilized to obtain a porous organic polymer with orderly distributed metals; and 3) performing high-temperature carbonization on the porous organic polymer with orderly distributed metals to obtain the porous organic polymer. The method II comprises the following steps: a) preparing a porous organic polymer with orderly distributed metals by adopting an ice template method; and b) carrying out high-temperature carbonization on the porous organic polymer with orderly distributed metals. The application of the porous organic polymer material in the fields of catalysis, composite material modification, supercapacitors and the like in other fields can be expanded through copolymerization or addition of functional fillers (such as magnetic particles, conductive fillers and the like).

The invention belongs to the field of geological exploration and mineral resource development, particularly relates to a method and a system for calculating a hydrothermal strength index TII in a reservoir, and aims to solve the problem that the hydrothermal activity strength of the reservoir cannot be quickly and accurately calculated in the prior art. The method comprises the following steps: collecting data related to reservoir characteristics in an oil and gas field as input data; preprocessing the input data to obtain preprocessed data; inputting the preprocessed data into the trained TII prediction model to obtain a predicted value of the comprehensive hydrothermal strength index TII; a TII prediction model is constructed based on a depth gradient lifting network; the TII prediction model comprises a first hidden layer, a second hidden layer and an output layer. According to the method, the calculation speed and precision of the hydrothermal activity intensity of the reservoir are improved.

The invention relates to the technical field of oil and gas field yield increase and transformation, in particular to a tight reservoir vertical well group fracturing optimization design method which comprises the following steps: collecting geological data and engineering data of a fracturing target block; a vertical well fracturing crack stress disturbance mathematical model is established, and reservoir disturbance stress distribution is simulated; establishing a crack support crack width attenuation mathematical model, and simulating a change rule of the support crack width along with time; combining engineering data with the stress disturbance mathematical model to determine a well group combination mode and a multi-well fracturing sequence of vertical well group fracturing; and based on the result of the fourth step, the fracturing time interval between the vertical wells in the well group is designed by combining the supporting seam width attenuation mathematical model. According to the method, the problems of well group combination mode, multi-well fracturing sequence, fracturing time interval and the like during tight reservoir vertical well group fracturing construction design are effectively solved, steering extension of fracturing cracks is achieved, the fracturing transformation effect of a reservoir is improved, and therefore the oil and gas yield of a single well is increased.

The invention relates to the technical field of oil exploration, in particular to a U-shaped factorization Fourier neural operator for oil exploration. The system comprises a conversion module, and a lifting operator lifts an input function to a potential space through a linear full-connection network; the U-Net neural network module is used for acquiring high-frequency information; the operator layer module enters a Fourier neural operator layer to learn low-frequency information; and a projection operator is projected back to a physical space through a linear full-connection network. According to the technical scheme, the U-shaped factorization Fourier neural operator can effectively reduce the influence of lost high-frequency information on the solving precision, the difficulty of learning the partial differential equation by the U-shaped factorization Fourier neural operator is reduced, the partial differential equation solver is a core component of petroleum industry software, and the cost is reduced. The assembly is integrated into petroleum industry software and is a key technology for increasing storage and production, improving the recovery efficiency and optimizing the production process.

The invention relates to the technical field of digital city physical examination, in particular to a BIM model-based city physical examination method and system. The urban physical examination method comprises the following steps: establishing a BIM three-dimensional model of a physical examination object, and determining coordinate data of the physical examination object; acquiring position data of the physical examination personnel, marking the position of the physical examination personnel in the BIM three-dimensional model according to the position data, and recording the position as a physical examination reference point; determining the relative orientation relationship between the physical examination building component and the physical examination personnel, and marking the building component in the BIM three-dimensional model according to the physical examination reference point and the relative orientation relationship; and associating the component physical examination result uploaded by the physical examination personnel with the building component. According to the method, automatic association of the physical examination result and the building component can be realized, the probability of data matching errors is effectively reduced, and efficient and accurate development of urban physical examination work is facilitated.

The invention relates to the technical field of sanitary ceramic forming, in particular to a high-pressure forming machine for high-pressure forming sanitary ceramic production. Comprising a suspension; a mold cavity with an open bottom is formed between the two side molds; when the bottom die and the two side dies are in a die assembly state, the bottom die seals the bottom of the die cavity; one end of each side shaft is movably arranged on the bottom die and is provided with a limiting piece for limiting the side shaft to be separated from the base, and the other end of each side shaft is movably inserted into the side die on the same side so as to maintain bearing of the bottom die in the die opening state; the elastic piece is used for pushing the outer end of the side shaft to keep being inserted into the side mold; the sliding seat is movably arranged on the lower side of the bottom die in the direction perpendicular to the die closing direction, and two guide rails with the front ends in an outward eight shape are formed on the upper side of the sliding seat in the moving direction of the sliding seat. The sanitary ceramic high-pressure forming device effectively solves the problem that sanitary ceramic high-pressure forming parts are inconvenient to take.

The invention discloses an AMT gear-shifting control method, and relates to the field of gear-shifting control. The AMT gear-shifting control method comprises the steps that information of the working state of a vehicle is obtained; the information of the vehicle working state comprises information of engine oil consumption, transmission efficiency, drive axle efficiency, an engine thermal management mode and accessory power consumption; according to information of engine oil consumption, transmission efficiency, drive axle efficiency and accessory power consumption, a power domain assembly performs cooperative control, and oil consumption is reduced; wherein a gear shifting strategy is generated based on different engine thermal management modes, and the whole vehicle is dynamically controlled; wherein the accessory consumption power comprises power consumption of air conditioner and engine accessories; and the whole vehicle dynamic control comprises whole vehicle dynamic control in a state of superposing the power consumption of the air conditioner and the engine accessories.

The invention discloses an electric folding mechanism suitable for an unmanned aerial vehicle arm and a control method thereof.The electric folding mechanism comprises an inner arm and an outer arm which are rotatably connected, the inner arm is connected with the unmanned aerial vehicle arm, and the outer arm is connected with a motor pipe used for installing an unmanned aerial vehicle rotor wing; one side of the inner arm is provided with a driving device which rotates circumferentially with a first rotating shaft as a fulcrum, the output end of the driving device is connected to one end of a lead screw, the free end of the lead screw and a ball sleeve form sliding motion pair connection, and the ball sleeve drives the outer arm to rotate around the inner arm under rotation of the lead screw. And meanwhile, the ball sleeve rotates circumferentially by taking the second rotating shaft as a fulcrum. According to the electric folding mechanism, through an electric driving mode, the problem that a traditional unmanned aerial vehicle is inconvenient to store in a nest is solved, the defect that an arm is difficult to automatically fold when the unmanned aerial vehicle is in a non-working state is overcome, the requirement for automatic operation in an unattended scene is met, and the electric folding mechanism is worthy of popularization.

The invention relates to the technical field of fracturing in oil and gas field development, in particular to a method for water injection pressure recovery degree and soaking time of an old well energy storage group, which comprises the following steps of: 1, establishing a multiphase flow fluid-solid coupling seepage model, and carrying out historical fitting of production dynamics before oil well refracturing to obtain four-dimensional ground stress and formation pressure distribution of an oil reservoir; calculating the remaining oil reserve; 2, according to the remaining oil reserve threshold value interval of the area, it is determined that the group refractures the group well, if the remaining oil reserve is within the threshold value interval, the operation is continued, and if the remaining oil reserve is not within the threshold value interval, the operation is stopped; and 3, according to production characteristics before water injection and energy increasing of the target group well. According to the method, blindness of refracturing construction design of the old well energy storage group is reduced, the overall reconstruction effect of fracturing is enhanced to the maximum extent, the reservoir reconstruction volume and the resource utilization degree are improved, and efficient development of tight reservoir oil and gas resources is achieved.

The utility model relates to the technical field of photovoltaic detection, in particular to a continuous displacement detection device for a photovoltaic module. According to the technical scheme, the device comprises a main machine shell frame assembly and a main machine vertical support assembly fixedly arranged on the outer side of the main machine shell frame assembly; a bottom rail beam is arranged on the lower portion of the front face of the main machine shell frame assembly, and side sliding rails are arranged at the side ends and make contact with the bottom rail beam. Transverse shaft supporting angle aluminum is arranged on the front face of the transverse shaft side supporting piece, and a transverse shaft rack and a transverse shaft guide rail are arranged at the upper end of the transverse shaft supporting angle aluminum. According to the utility model, dynamic transverse continuous detection of the photovoltaic panel is realized, different areas of the photovoltaic panel can be rapidly covered, comprehensive detection data can be obtained, the detection period is greatly shortened, convenience is provided for longitudinal dynamic test of the photovoltaic module, detection dimensions are enriched, and efficient and accurate development of detection work is guaranteed in all directions.

This invention discloses an endogenous polypeptide, its preparation method, and its application. The structural formula of the polypeptide is shown in Formula (I): R1-(AA1)m-AA2-AA3-(AA4)n-R2, Formula (I); wherein, m is independently 2 or 3; n is independently 1, 2, or 3; AA1 is independently K, R, or H; AA2 is independently I or W; AA3 is independently I or W; AA4 is independently K, R, or H; R1 is any one of -H, Y, LY, PLY, or LLY; R2 is any one of -OH, L, LL, E, EL, EW, W, EH, or EHL. While retaining its targeted antioxidant and anti-inflammatory functions, the polypeptide has removed the domain with high affinity for heparin, thereby avoiding signal interference and potential biosafety risks that may be caused by full-length PF4, and meeting the safety requirements for cosmetic ingredients.