28results about How to "Full coverage" patented technology

The invention provides a non-contact on-line measuring device and method for excavator structural members, a double-scanning system cooperation mode is adopted, a tracker and a ball cage scanner are respectively used on two sides of a detection device, the ball cage scanners are installed on a cooperative robot to execute automatic scanning actions, and meanwhile, the robot is driven by the robot to move. The tracker and the robot are both installed on the linear guide rail, displacement operation can be carried out, the scanning and collecting range of the system is expanded, and therefore full scanning work of the large structural part is completed. The two scanning systems scan and collect the structural member from the left side and the right side at the same time, then data are spliced together, a three-dimensional point cloud model of the structural member is obtained, size information is analyzed and extracted, a detection report is generated, communication with a workshop data management system is carried out, and measurement data are integrated and applied.

The application relates to a full polarization high-gain wide-band conformal antenna, belongs to the technical field of electromagnetic propagation and energy collection, and particularly relates to a full polarization high-gain wide-band conformal antenna and a small-size rectifier circuit. The application conforms to the inner wall of an energy collection box by using an improved structure simple Yagi antenna, expands the working frequency band range of the antenna, is convenient for integration with equipment, and reduces the size of the energy collection device. The application designs an ultra-wide-band and compact structure quadrature coupler which is integrated at the bottom of the device. The quadrature coupler can realize 3db coupling in a wide frequency band range, evenly divides the energy received by each port into two paths, and solves the problem of low efficiency caused by the imbalance of the rectifier link in the prior art. The rectifier is small in size, has a good joint simulation effect, and is convenient for integration. The antenna can work in different radio frequencies and power ranges.

This application relates to an electroplated reinforced hanger, comprising a main shaft and multiple annular bases vertically distributed along the main shaft. Multiple hook assemblies are arranged around the annular bases. Each hook assembly includes a support rod, an arc-shaped elastic element, and an S-shaped elastic element. The arc-shaped and S-shaped elastic elements are connected to the support rod, with the arc-shaped elastic element positioned above the S-shaped elastic element. The arc-shaped elastic element is configured to abut against the inner wall of the cylindrical material through inward radial elastic deformation, while the S-shaped elastic element is configured to bend upward and abut against the outer wall of the cylindrical material through outward radial elastic deformation. By incorporating the arc-shaped and S-shaped elastic elements, the arc-shaped elastic element abuts against the inner wall of the material with its toughness, while the S-shaped elastic element undergoes outward radial elastic deformation. Through bidirectional elastic clamping, the cylindrical material can be firmly fixed and will not fail due to slight differences in its diameter, effectively preventing the risk of detachment under severe liquid flow impact.

The utility model discloses a multi-piece overlapped type lubricating pinion which comprises a plurality of gear pieces, and the gear pieces are overlapped to form a gear. When the two opposite gear pieces are attached and stacked, the two oil grooves form a closed oil channel, each gear tooth corresponds to two oil channels, and the two oil channels penetrate through different tooth surfaces of the gear tooth respectively. The gear sheet is provided with bulges at oil outlets of the oil channels; the outer wall of the shaft tube is in smooth fit and rotary fit with the circular through hole of the gear sheet; an oil cavity and an oil hole penetrating through the oil cavity are formed in the center of the shaft tube along the central axis, and when the shaft tube is sleeved with the gear piece, the oil hole corresponds to the oil channel oil inlet in position. The pinion composed of the gear pieces is not directly attached to the gear to be lubricated through the tooth surface, lubricating grease flows out through the protrusions and then is guided to flow towards the two sides of the gear to be lubricated in the thickness direction, and the lubricating gear is fully covered. When the difference is small, the gear gaskets are thin, and the thickness specification can be finely adjusted by adjusting the number of the gear gaskets.

The utility model discloses blowing equipment and a welding system, and belongs to the technical field of battery production. The air blowing equipment comprises a base assembly, a mounting seat and an air blowing assembly. And after the confluence disc is installed at the position, where the second avoiding area is arranged, in the installation base, the galvanometer scanning welding equipment is used for emitting a laser beam, and the laser beam can sequentially pass through the first avoiding area on the base assembly and the second avoiding area on the installation base so as to accurately weld the confluence disc. Meanwhile, the blowing assembly is communicated with the connecting channel, and the connecting channel is communicated with the second avoiding area. Therefore, in the welding process of the confluence disc, the air blowing assembly can blow the shielding gas into the connecting channel, the shielding gas is guided to the second avoiding area through the connecting channel, and therefore the welding area of the confluence disc can be fully covered with the shielding gas. In this way, the strength of the welding seam is improved, and the welding quality of the convergence disc is good.

This invention discloses a fully automatic PTC heater surface spraying device, including a worktable. A moving module is installed on the top of the worktable, and the output end of the moving module is connected to a material picking module. The material picking module is used to pick up, transfer, and adjust the position of the material to be sprayed. Two sets of baffles are installed on the top of the worktable, forming a spraying space between the two sets of baffles. The material picking module can move the material to be sprayed into this spraying space. This invention belongs to the technical field of heater production equipment. The technical effect achieved is as follows: by setting a work chamber composed of two fixed covers and two relatively movable frames, and cooperating with the bidirectional moving module, after the material picking module moves the material to be sprayed to the spraying station, it can automatically close to form a closed spraying environment. This closed structure, in conjunction with the holes opened on the baffles, ensures that the paint sprayed from the spray gun head can only be accurately coated on a specific area of ​​the material through the holes, effectively preventing the paint from atomizing and escaping outward.

The invention discloses a remote sensing technology-based land surveying and mapping system, which comprises a land basic information acquisition module, a precision data processing module, an image analysis processing module, a comprehensive identification processing module and a surveying and mapping information output module, and relates to the technical field of remote sensing surveying and mapping. According to the method, the technical problems of missing detection, false detection or discontinuity when the boundary in the image is identified are solved, through double screening of similar image judgment and boundary correlation verification, it is ensured that only effective image pairs containing the land boundary are reserved, boundary complementation is achieved through a double-image boundary fusion algorithm, and missing detection of a single image is avoided; the contour is optimized in combination with the parameterized Canny algorithm, compared with existing pure edge detection, the boundary burr removal rate and the shape fidelity are improved, curvature screening and distance constraint strategies are adopted for key inflection point extraction, core features are reserved while redundant points are removed, and the boundary point set precision is improved.

The invention discloses a medical image segmentation method and system based on diffusion difference learning, and relates to the technical field of image processing. Comprising the steps of obtaining a medical image data set; inputting the medical image data set into a diffusion generation model taking the class activation graph corresponding to the medical image as a visual priori condition to obtain diffusion semantic noise corresponding to the same medical image and different class labels; obtaining an initial semantic segmentation result according to diffusion differences between diffusion semantic noises corresponding to different categories of labels; carrying out thresholding binarization processing on the initial semantic segmentation result to obtain a plurality of initial segmentation masks of the same medical image; and fusing all the preliminary segmentation masks to obtain a segmentation result set of the medical image. According to the method, the class activation graph is used as visual priori knowledge, the insufficient coverage of the class activation graph is compensated through a condition generation mechanism, and the robustness and integrity of a segmentation result are improved.

This invention discloses a method and system for evaluating DNA storage sequencing depth based on channel simulation, addressing the problems of inaccurate predictions and limited guidance in existing uniform distribution models. The method includes: when sequencing data is available, fitting real data to obtain log-normal distribution parameters μ and σ; when sequencing data is unavailable, obtaining μ and σ through simulation modeling based on experimental parameters; and combining these parameters to calculate the decoding ratio of the coding strand in the noiseless channel and the sequencing depth boundary in the noisy channel. The system includes input, storage channel modeling, sequencing depth calculation, and output modules. The model of this invention closely reflects reality, provides accurate predictions, reduces DNA storage and retrieval costs, improves the success rate of single-sequencing decoding, and is easy to use, facilitating the practical application of the technology.

The utility model provides a drying room for steel plate pretreatment. The drying room comprises a drying room body, a conveying assembly is installed in the drying room body, a drying mechanism is arranged in the drying room body, a fan is fixedly installed at the top of the drying room body, and an air outlet is fixedly formed in the position, located on the upper side of the fan, of the upper surface of the drying room body. Through use of the drying mechanism, two fixed boxes and an exhaust fan on the upper side convey hot air to the upper side and the lower side of the conveying assembly through exhaust pipes correspondingly, and a plurality of exhaust ports are evenly formed in the exhaust pipes, so that the hot air can evenly cover the surface of a steel plate in an omnibearing mode, and excessive drying caused by hot air concentration in partial areas is avoided; and drying is not thorough due to insufficient hot air in other areas. And the consistent drying degree of the surface of the steel plate is ensured, the probability that the steel plate deforms, cracks and the like due to non-uniform drying is effectively reduced, and therefore the overall quality and efficiency of steel plate pretreatment are improved.

This utility model discloses a solder mask opening structure for surface mount components, relating to the field of printed circuit board design technology. The solder mask opening structure for surface mount components includes a printed circuit board, which comprises a solder mask layer and a metal layer. A solder mask opening is provided on the solder mask layer. The metal layer is connected to the solder mask layer, and a first pad and a second pad are provided on the side of the metal layer facing the solder mask layer. The technical solution of this utility model fully considers the characteristics of small pad spacing and tiny solder shoulder size of 01005 surface mount components. By eliminating the solder mask bridge between the first and second pads, the first and second pads are fully exposed within the solder mask opening. Furthermore, by controlling the reasonable gap between the outer walls of the first and second pads and the inner wall of the solder mask opening, the solder paste printing and soldering process is optimized, fundamentally solving common problems such as solder balls, tombstoning, and cold solder joints in the SMT soldering process of 01005 surface mount components.

The invention discloses a method for quantitatively detecting cucumber green mottle mosaic virus (CGMMV) infectious viruses in watermelon seeds based on propionium bromide azide (PMA) pretreatment and reverse transcription quantitative polymerase chain reaction (RT-qPCR). The method comprises the following steps: S1, preparing a seed suspension containing virus particles; s2, grouping the suspensions, adding PMA with the final concentration of 150-170 [mu] M into a PMA treatment group, incubating for 20-40 min in a dark place, then carrying out blue light (460-490 nm) irradiation to enable PMA to selectively inhibit non-infectious virus nucleic acid amplification, and not adding PMA into a control group or carrying out inactivation treatment on the control group; s3, extracting nucleic acid, and carrying out RT-qPCR (real-time quantitative polymerase chain reaction) on the nucleic acid by adopting a specific primer pair CG-2439F / CG-2625R to obtain a Cq value or a nucleic acid amount; and S4, comparing the results of the PMA treatment group and the control group to determine the infectious CGMMV content or the live virus proportion. The method can reduce inactive virus interference, is suitable for seed quarantine, virus risk assessment and disinfection effect evaluation, and can provide a matched detection kit.

The utility model belongs to emulsifier technical field especially relates to a kind of emulsifier production mixing device, including mixing tank, fixed ring, support column and support seat, the fixed ring is fixedly installed on the outer surface of mixing tank, the support column is fixedly installed on fixed ring bottom end, the support seat is fixedly installed on support column bottom end, the mixing tank inside is provided with stirring mechanism and cleaning mechanism.The emulsifier production mixing device, by setting stirring mechanism, adopt the design of multilayer different shape's stirring vane, can fully cover mixing area, from different levels and angle to raw material stirring, effectively improve the uniformity of mixing, ensure the consistency of emulsifier product quality, solve the traditional mixing device in the background art using simple stirring mode, the design of stirring paddle is relatively single, cannot fully cover mixing area, leading to the problem of uneven mixing.

This invention relates to the field of autonomous UAV inspection technology, and discloses an autonomous obstacle avoidance method for bridge inspection using UAVs. The method includes: structuring prior bridge information to generate a 3D bridge model; calculating the working distance and performing multi-constraint viewpoint planning based on camera parameters and the 3D model to generate an initial viewpoint set; performing global path planning for the initial viewpoints through multi-objective greedy search; combining the 3D model to perform viewpoint connection obstacle avoidance, convex polyhedron feasible region construction, and trajectory optimization on the initial path; registering the optimized path with real-time SLAM point clouds and converting it to the world coordinate system; performing online semantic segmentation, viewpoint generation, and local optimization based on real-time perception to generate sub-flight trajectories; performing dynamic obstacle detection and observation gain-guided replanning based on a semantic map; and finally achieving high-precision tracking of each trajectory through feedforward-feedback control. This invention achieves fully autonomous bridge inspection with complete coverage, clear imaging, and adaptability to dynamic environments.

The invention relates to the technical field of digitization, and discloses a Zabbix-based database capacity expansion and real-time monitoring operation and maintenance system and method, and the method comprises the steps: uniformly configuring monitoring items and labels in Zabbix, constructing a metric vector, and carrying out approximate aggregation and collection window control; carrying out seasonal decomposition and short-term prediction on the load based on multiplicative Holt-Winters, and generating near-future estimation of the key quantile; the normalized indexes are aggregated into capacity expansion confidence coefficients according to weights, and stable triggering and mild recovery are achieved in combination with trend terms and double-threshold gating; sLO is used as a first principle to calculate default risks, and resource requirements and the number of nodes are estimated in a vectorization mode. According to the method, jitter expansion is inhibited through capacity expansion triggering, scale optimization and migration arrangement, false alarm noise reduction and tail time delay risk are incorporated into objective function optimization, predictable, full-coverage and low-risk database elastic capacity expansion and monitoring operation and maintenance closed loop are realized, SLO standard reaching and system stability are remarkably improved, and the total cost is reduced.

The utility model discloses a sealed storage device for building waterproof materials, which comprises a storage plate, a plurality of rollers are mounted at the bottom of the storage plate, a pair of push handles is fixedly connected to the top of the storage plate, a grip is fixedly connected between the push handles, a plurality of storage grooves are formed in the top surface of the storage plate, and the storage grooves are communicated with the rollers. A positioning plate is installed at the top of the storage plate, a plurality of through holes are formed in the positioning plate, a plurality of sealing cylinders are fixedly connected to the top of the positioning plate, a moisture absorption bin is fixedly connected to the top of an inner cavity of each sealing cylinder, and a plurality of moisture absorption holes are formed in the side wall of each moisture absorption bin; and the top of the moisture absorption bin is open and is provided with a top cover. The building waterproof material storage box is convenient to move and carry and wide in application range, stored building waterproof materials can be protected to prevent leakage, the placing position of a drying agent can be reasonably planned to enable the drying agent to fully cover each building waterproof material, and the damp-proof effect is good.

The utility model discloses a conveyor with disinfection function, which comprises a conveyor body, a conveyor belt is movably mounted on the conveyor body, a side plate is mounted on the conveyor body, a top plate is fixedly mounted at the top of the side plate, and a lifting disinfection mechanism is arranged on the inner side of the top plate. The lifting disinfection mechanism comprises a driving cylinder screwed on the top plate, and an output shaft of the driving cylinder penetrates through the top plate and is fixedly connected with a fixed plate; a chuck is fixedly arranged at the end part of the fixed plate, the chuck is sleeved on the outer side of the disinfecting and killing pipe, a plurality of groups of atomizing nozzles are uniformly mounted at the bottom of the disinfecting and killing pipe, and a hydrogen peroxide inlet hose is mounted on the disinfecting and killing pipe. According to the conveyor with the disinfecting and killing function, the height of the disinfecting and killing pipe is flexibly adjusted, so that an appropriate distance is kept between an atomizing nozzle and the surface of an object; the problem that the solution is wasted or disinfection is not thorough due to the fact that the distance between the spray head and the articles is too close or too far is solved while the disinfection effect is guaranteed, and the adaptability of the device to disinfection of different types of articles is improved.

The invention discloses an automobile lower guard plate screw hole stamping device which comprises a sleeve rotationally connected to the interior of the bottom end of a cylinder, a male die is slidably connected with the sleeve, and a plurality of brush plates are mounted on the inner wall of the sleeve and abut against the cylindrical surface of the male die. The telescopic multi-stage copper pipe is integrated in the male die. One end of the multi-stage copper pipe is in contact with cooling liquid, heat generated during punching operation of the male die can be transferred to the cooling liquid, annealing softening caused by heat accumulation in the male die is avoided, meanwhile, the male die retracts to drive the brush plate to rotate, the working surface of the male die is automatically and evenly coated with a lubricant, and the working surface of the male die is automatically and evenly coated with the lubricant while the male die and the multi-stage copper pipe form an internal and external synergistic heat dissipation mode. And lubrication preparation can be made in advance for the next stamping process, and meanwhile the problems that when a traditional male die is used for stamping, abrasion is large, the service life is short, and the cutting edge is annealed and softened due to excessive internal accumulated heat are well solved.

The utility model discloses an adsorption type heavy metal sewage treatment device relates to sewage treatment device technical field, and the utility model discloses a processing jar is personally experienced sth, and the top of processing jar is equipped with the water inlet pipe, and the top of water inlet pipe is equipped with the flange, and the inside processing jar is equipped with the movable bucket, and the below movable bucket of processing jar is fixed with the installation frame, and the inside installation frame is fixed with the screening filter screen, and the below screening filter screen of processing jar is fixed with the suction accessory of installation, and the bottom of movable bucket is equipped with two distribution buckets, and the middle part of movable bucket is equipped with three equidistance distribution setting through -groove, the utility model discloses in the movable bucket of setting in processing jar, make sewage no longer directly impact the single area of adsorption material, but through distribution bucket cover adsorption material edge, through -groove guide sewage flow direction adsorption material middle, finally let sewage evenly, fully cover adsorption material every place area, ensure that adsorption material whole is in the high -efficient filtration state.

This invention discloses a highly stable platinum / palladium-based ammonia oxidation catalyst with a bilayer gradient support, its preparation method, and its applications. The catalyst possesses a multi-level synergistic structure of "atomic-scale dispersed Pd or Pt / V-O-W oxide / hydroxylated TiO₂@(ZrO₂ / Al₂O₃ / CeO₂ or its composite oxide) bilayer gradient support," forming a Pd-O-V / Pt-O-V bonded electronic synergistic system and constructing a protective outer layer with a precise pore size of 2-5 nm. It is constructed through a precise sequential process including hydrothermal hydroxylation modification, atomic layer deposition, sol-gel, and low-temperature reduction post-treatment. The ammonia oxidation catalyst provided by this invention achieves a synergistic effect of intrinsic anti-poisoning and high activity over a wide temperature range. The ZrO₂-CeO₂ composite oxide outer layer further enhances its antioxidant protection capability; the atomic-scale dispersion of Pd or Pt achieves ultra-low loading and high atomic utilization, significantly reducing costs. This invention solves the core technical problems of traditional Pd or Pt-based catalysts being prone to poisoning and deactivation, and having poor low-temperature activity.

The present application relates to the technical field of enveloped vibrating screen, and particularly relates to an enveloped vibrating screen for titanium dioxide and a screening method thereof, which comprises a fixed base, supporting springs, a protective shell, a re-screening mechanism, a driving motor, a vibrating screen machine, a bottom outlet and a vibrating screen assembly; the supporting springs are installed at four corners of the fixed base, the protective shell is installed above the supporting springs, the re-screening mechanism is installed on the side of the protective shell, the re-screening mechanism is used for re-screening the material after the initial screening under the driving of the driving motor, the driving motor is installed above the re-screening mechanism, the vibrating screen machine is installed on both sides of the protective shell, the bottom outlet is arranged below the protective shell, and the vibrating screen assembly is installed inside the protective shell, the vibrating screen assembly is used for initially screening the mixed material and outputting small-particle material downwards.

This utility model discloses a front-end pipeline arrangement structure for online sludge removal from raw brine tanks, belonging to the field of heat pump salt production technology. Its features include: a raw brine tank body, sludge removal pipes, and auxiliary pipes connected to the sludge removal pipes at the front end; at least two sludge removal pipes and a corresponding number of auxiliary pipes form a sludge removal pipe group. The sludge removal pipes and auxiliary pipes of the sludge removal pipe group penetrate the tank wall from the outside of the raw brine tank body and form a Y-shaped distribution on the inside of the raw brine tank body. The sludge removal pipe groups are evenly distributed circumferentially on the raw brine tank body, and the inner openings of all the sludge removal pipes of the sludge removal pipe groups are evenly distributed circumferentially on the inside of the raw brine tank body. This front-end pipeline arrangement structure exhibits excellent performance in terms of structural rationality, sludge removal effect, system maintainability, and operational safety, and is a key technical support for achieving efficient online sludge removal from raw brine tanks.

The application relates to the field of semiconductor processing, in particular to a spin dryer for wafer processing. The spin dryer comprises a box body, a top cover, a conveying pipe and a plurality of guide plates. The box body is internally provided with a spin-drying cavity. A spin-drying support is rotationally arranged in the spin-drying cavity. A plurality of object frames are uniformly distributed on the spin-drying support. A wafer is arranged on the object frame. The top cover is hingedly connected to the top of the box body. The conveying pipe is arranged on the top cover. The plurality of guide plates are arranged on the conveying pipe. The guide plates are evenly divided into a plurality of groups along the circumferential direction of the conveying pipe. The guide plates in the same group are arranged in an up-down interval. All the guide plates can rotate around a horizontal axis. In the application, the guide plates are in a downwardly folded state in an initial state, which facilitates the opening and closing of the top cover. In the spin-drying process, the guide plates are in an unfolded state and are closer to the wafer, so that most of the liquid medicine or gas can be sprayed into the interlayer gap of the wafer, thereby more fully covering the surface of the wafer and improving the cleaning effect on the wafer.

This invention relates to the field of ultrasound data processing technology, and more particularly to a data standardization processing method for testing AI ultrasound large-scale models. The method includes the following steps: acquiring ultrasound image data from multiple external data acquisition centers and recording the metadata of each center; identifying differences in equipment imaging characteristics among different data acquisition centers based on the metadata, establishing a target benchmark distribution, and calibrating the grayscale and texture features of ultrasound image data from non-benchmark centers to obtain equipment-calibrated ultrasound image data; performing quality assessment on the equipment-calibrated ultrasound image data based on image clarity and integrity indicators, and performing quality repair processing to obtain a standardized ultrasound image dataset for testing AI ultrasound large-scale models. This invention eliminates non-physiological variations in test data introduced by equipment differences and quality defects, providing scientifically reliable test data for the clinical application of AI ultrasound large-scale models.

This utility model discloses an anti-agglomeration structure for an art paint mixing tank, including a mixing drum. A protective cover is slidably connected to the outer surface of the mixing drum. A stirring element is located above the protective cover. Multiple lifting support elements are provided on the outside of the mixing drum. Each lifting support element includes a support slide, and an electric push rod is fixedly installed on the inner bottom wall of each support slide. This device, driven by a variable frequency motor, rotates the stirring rod inside the mixing drum, generating a strong stirring force from the stirring blades. This force propels the paint to flow in multiple directions within the mixing drum, effectively breaking up agglomerates in the paint. Furthermore, the electric push rod in the lifting support element can move the protective cover and the stirring element up and down, allowing the stirring element to perform uniform stirring at different positions inside the mixing drum. Compared to fixed-position stirring, this method can more fully cover all height levels within the mixing drum, further improving the uniformity of the stirring.

The utility model discloses a lampshade, and belongs to the technical field of lighting equipment. The lampshade is mainly composed of a mounting base, an auxiliary joint, a first connecting rod, a second connecting rod, a sliding body, an adjusting ring, lampshade cloth and the like. During transportation, the auxiliary joint is connected with the mounting seat to support the device, the device is compact, the space is saved, and the transportation cost is reduced. The adjusting ring can be detached and adjusted according to bulbs of different sizes and the lamp holder, and universality is improved. The operation is simple when the lampshade is unfolded, and the slider-crank mechanism is used for pushing the sliding body. A reflecting material is arranged on one side of the lampshade cloth to enhance illumination brightness. The lampshade solves the problems that an existing lampshade is tedious in assembly and poor in applicability, and has the advantages of being convenient to transport, high in applicability, easy to operate and the like.

The utility model relates to the technical field of electro-fused white corundum cooling and dust removal, and discloses an electro-fused white corundum cooling and dust removal device which comprises a cooling and dust removal mechanism and a bag-type dust remover, the cooling and dust removal mechanism comprises a cooling and dust removal box, a cooling fan and a mounting water pipe, and a top cover is fixedly mounted at the top of the cooling and dust removal box. And a plurality of mounting water pipes are fixedly mounted on the inner walls of the two sides of the top cover. Through the arrangement of a mounting water pipe, a water spraying head and the like, water mist can make more uniform contact with materials, the heat exchange speed is increased, the material cooling time is effectively shortened, the production efficiency is improved, through the arrangement of a cooling dust removal box, a cooling fan and the like, airflow is guided through a connecting air pipe in a matched mode, external cold air can be rapidly sucked into the box, and the cooling efficiency is improved. Good air convection is formed, material cooling is accelerated, the stability and high efficiency of the cooling process are guaranteed, external dust and impurities are prevented from entering the cooling dust removal box, and impurities are prevented from being doped in the fused white corundum.

This invention discloses a method for fine mapping of QTLs for important traits in mulberry trees based on chromosome segment substitution lines, belonging to the field of molecular breeding technology. It includes: S1: Constructing a genotype-phenotype association matrix: The backcross population is screened through high-heterozygous parental hybridization and multiple generations of backcrossing, and the genomes of the screened backcross population are marked using targeted sequencing and recombination hotspots; S2: Phenotypic modeling: Samples are collected from the experimental plants, and a hybrid model is obtained based on the environmental effects of the experimental plants and the covered CSSL lines; S3: Gene screening: Hub genes are screened using the constructed co-expression network model and hybrid model. This invention dynamically marks the genome through multiple generations of backcrossing, targeted sequencing, and recombination hotspot analysis, and constructs a tiered covered CSSL library, thereby effectively compressing QTL intervals and overcoming the mapping ambiguity problem caused by limited recombination events in traditional F2 or RIL populations.