37results about How to "For easy reference" patented technology

The utility model discloses a horizontal packaging machine, and relates to the technical field of packaging machinery. The utility model discloses a quick release type feeding tailstock, material conveyer, film walking device, roll film forming device, longitudinal sealing device, horizontal sealing device and electrical appliance box, adopts quick release type feeding tailstock, has quick release function, is convenient to clean feeding tailstock, ensures the hygiene of material on quick release type feeding tailstock, improves the production efficiency, reduces the production cost, and improves the production efficiency. The film feeding device is arranged below the material conveying device, namely, a lower film feeding mode is adopted, so that materials are directly conveyed to a rolled film after being output from the quick-disassembly type feeding tailstock, the materials are prevented from making contact with other devices outside the quick-disassembly type feeding tailstock, sanitation of the materials to be packaged is guaranteed, meanwhile, a protective cover is arranged, and the protective cover can be used for protecting the materials to be packaged. External pollution is avoided during longitudinal sealing and transverse sealing, the quick-frozen materials are protected to a certain extent, corrosion of the packaging machine caused by water vapor of the quick-frozen food is avoided, and the packaging machine can be waterproof and moistureproof.

The invention relates to a heterogeneous cluster performance prediction method, system and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the steps of obtaining respective operation data of at least one type of accelerators in a heterogeneous cluster, wherein the operation data is generated when a target model is iteratively trained through the heterogeneous cluster; based on the respective operation data of the at least one type of accelerators, performing statistics on the data processing amount and the data processing duration of the heterogeneous cluster during at least one round of training, and determining the actual measurement force utilization rate of the heterogeneous cluster according to the data processing amount and the data processing duration; an isomorphic cluster matched with the heterogeneous cluster is determined, and the theoretical computing power utilization rate of the isomorphic cluster is predicted according to the total computing power value of the isomorphic cluster and the network structure of the target model; and comparing the actual calculation power utilization rate with the theoretical calculation power utilization rate to obtain a performance prediction result of the heterogeneous cluster. By adopting the method, the heterogeneous cluster performance can be effectively evaluated.

The invention discloses an arm two-degree-of-freedom transformation quadrotor flight control method and device. The method comprises the following steps: S1, carrying out structural design on an arm two-degree-of-freedom transformation quadrotor; s2, deducing a kinetic model and a kinematic model of the two-degree-of-freedom transformation quadrotor of the arm according to the two-degree-of-freedom transformation quadrotor structure of the arm; s3, deducing a control distribution model of the two-degree-of-freedom deformation quadrotor of the arm according to the steps S1 and S2; s4, analyzing the singularity problem of a control distribution model according to the control distribution model of the two-degree-of-freedom deformation quadrotor of the arm derived in the step S3, and designing a special control distribution model for the singularity; and S5, designing a pose quaternion nonsingular terminal sliding mode flight controller according to the dynamical model, the kinematic model, the control distribution model and the special control distribution model of the arm two-degree-of-freedom deformation quadrotor. The method has good control and stabilization effects on the two-degree-of-freedom deformation four rotors of the arms.

The invention discloses a peacetime and wartime combined traffic infrastructure node importance dynamic evaluation method. The method comprises the following steps: firstly, collecting basic information and traffic network information of traffic infrastructure nodes in a to-be-evaluated region, and constructing a three-level evaluation index system; constructing a single-layer undirected weighted sub-network and an overall multi-layer undirected weighted network under each traffic mode according to the distance between the edges of the nodes; determining the degree, betweenness and compactness of each node; according to a CRITIC method, objective weight values of all indexes in the three-level index system are determined; according to a D-AHP method, determining a subjective weight value; according to a game theory, determining a comprehensive weight after subjective and objective weight combination optimization; according to a TOPSIS method, determining a basic score and a usual importance degree sequence of each node; determining an efficiency score of each single-layer sub-network; determining the comprehensive efficiency of the whole multi-layer network; and determining a wartime importance degree sequence of each node according to the residual overall multi-layer network comprehensive efficiency after the nodes are dynamically deleted.

The utility model discloses a laboratory fume hood exhaust device which comprises a pipe body, installation flanges are fixedly installed on the outer sides of the two ends of the pipe body, grids are movably installed at the two ends of the pipe body, a fixing frame is fixedly installed in the pipe body, supporting rings are fixedly installed at the opposite ends of the fixing frame, and two supports are fixedly installed on the inner sides of the supporting rings. A motor is fixedly installed on the inner sides of the two supports, a flow guide cone is fixedly installed at one end of the motor, a rotating shaft is fixedly installed at the output end of the motor, fan blades are fixedly installed on the outer side of the rotating shaft, a flow guide frame is fixedly installed in one end of the pipe body, a plurality of shaft seats are fixedly installed at the top and the bottom of an inner cavity of the pipe body, and rotating rods movably sleeve the inner sides of the shaft seats. And through the arranged control box, an operator can conveniently check the control quality at the exhaust position, reference is facilitated, the air quality is conveniently judged, ventilation and exhaust are judged and controlled, and the use effect is good.

The invention relates to a clinical data classification method based on BERT, Bi-LSTM and an attention mechanism, and the method comprises the steps: collecting clinical data of a patient, and carrying out the tag processing; performing word segmentation processing by using a word segmentation device; bERT is used as an encoder, and feature representation of data after word segmentation is obtained; inputting the feature representation into a Bi-LSTM model to obtain an advanced representation of the data sequence; inputting the advanced representation of the sequence into an attention layer to calculate an attention weight; and multiplying the attention weight by the output of the Bi-LSTM, inputting a result into a full-connection layer to perform data classification, and performing data classification by means of a softmax activation function. According to the method, the BERT, the Bi-LSTM and the attention mechanism are combined, long-text clinical data of the patient can be better processed, and the long-distance dependency relationship in the text can be better understood, so that the clinical data of the patient can be better classified, the disease type of the patient can be better analyzed, and a doctor can be helped to accurately grasp the disease condition and make a treatment scheme.

The invention discloses a safe working area calculation method, device and system of an MOSFET and a storage medium, and relates to the technical field of semiconductors. The method comprises the following steps: acquiring MOSFET temperature sensitive parameters; obtaining a relation curve between the MOSFET temperature sensitive parameter and the MOSFET junction temperature; acquiring transient thermal impedance of the MOSFET under different duty ratios and different pulse widths; calculating the maximum allowable power loss of the MOSFET under different pulse widths of the single pulse; calculating a safe working area SOA curve coordinate of the MOSFET; and automatically calculating, drawing, storing and outputting a safe working area SOA diagram of the MOSFET on the basis of Qt Widgets. According to the SOA calculation method for the safe working area of the MOSFET, the thermal performance and the electrical performance of the MOSFET are comprehensively considered, the safe working area of the MOSFET is determined through a series of experiments and calculation steps, and the accuracy of a calculation result is improved.

The embodiment of the invention provides a digital intelligence information system including financial budget management and electronic equipment, and relates to the technical field of information systems. The system comprises a data storage layer used for storing various data from other related systems or manually filled and reported data; the form storage layer is used for storing a classification form generated based on the data in the data storage layer, and the classification form comprises a function classification form and a time period classification form; the application program layer is used for storing templates of various data boards, approval processes and assessment data, and the data in the templates are called from the form storage layer; and the user interface layer is used for acquiring a user instruction and displaying the corresponding template in the application program layer containing the data based on the user instruction. According to the implementation mode provided by the invention, the informatization level of enterprise financial budget management is improved, and the labor cost is saved.

The present invention relates to the technical field of automobile injection molding repair, and in particular to a defect repair device for automobile interior injection molding. The present invention includes a supporting device, a fixture, a preparatory processing device and an injection device. A material moving device is installed on one side of the supporting device, and a shaping device and a monitoring device are also installed on the supporting device. The supporting device is used to support other structures to facilitate processing operations. The fixture is used to install and fix molds and injection moldings that need to be repaired, which is convenient for repair operations on injection moldings and avoids displacement of injection moldings during processing. The material moving device is used to transfer and transport injection moldings to be repaired, which is convenient for automatic loading and improves equipment processing efficiency. The preparatory processing device is used to perform preliminary processing and repair on the injection moldings to be repaired, which is convenient for subsequent repair and shaping operations. The injection device is used to inject hot melt material into the area to be repaired of the injection molding to achieve automatic material replenishment and repair.

The utility model discloses a kind of nail gun interactive systems and nail gun, wherein interactive system includes controller, communication module, state monitoring module and display module, the communication module is used to be connected with external terminal equipment and / or cloud communication, to be used for the information transmission of the controller acquisition to external terminal equipment and / or cloud, the state detection module is electrically connected with the controller, to be used for monitoring the use state of nail gun, and monitoring data is transmitted to the controller, the display module is electrically connected with the controller, to be used for the nail frequency of the controller transmission is displayed, state monitoring module can accurately monitor the state data of nail gun in real time, avoid traditional nail gun rely on user feeling, or maintenance personnel judge according to experience, accurate monitoring can be carried out by state monitoring module and display is carried out by display module, convenient for the reference of user and maintenance personnel.

The utility model discloses a circular hoop diameter adjusting device for building construction, and relates to the technical field of diameter adjusting devices. A circular hoop diameter adjusting device for building construction comprises a plurality of lead screws which are circumferentially distributed, and the multiple lead screws are in threaded connection with sliding blocks; the synchronous driving assembly is used for synchronously driving the lead screws to rotate synchronously; a limiting baffle is installed on the sliding block, and an operation distance is reserved between the limiting baffle and the front end of the sliding block. The synchronous driving assemblies such as the conical fluted disc and the bevel gear are driven by the motor to drive the screw rods to rotate synchronously, so that the sliding blocks mounted on the screw rods can synchronously change the positions between the sliding blocks and the circle center of the conical fluted disc, and the required diameter of a steel bar circle can be accurately adjusted; the grooves formed in the front ends of the sliding blocks can limit the steel bars and prevent the steel bars from slipping, and the cushion blocks with the same thickness are additionally arranged in the grooves, so that the depth of the grooves can be flexibly adjusted, and the steel bars are convenient to take and place.

The invention relates to the technical field of voriconazole detection, in particular to a voriconazole structure identification method based on multi-dimensional nuclear magnetic resonance, and the voriconazole structure is analyzed through ultraviolet absorption spectrum (UV), infrared absorption spectrum (IR), ultrahigh resolution mass spectrum (FT-MS), 1D / 2D nuclear magnetic resonance (NMR), thermal analysis (TGA, DSC) and X-ray powder diffraction (XRD). According to the method, information of a nuclear magnetic HMBC spectrum is fully utilized, the configuration of a sample is reasonably analyzed, the result is consistent with the chemical structure of the sample, each spectrum is reasonable in attribution, the crystallinity of the voriconazole is verified through X-ray powder diffraction, the melting point and the thermal stability of the voriconazole are represented through thermal analysis, the voriconazole is detected through multiple dimensions, detection is more comprehensive, and the method is suitable for large-scale popularization and application. And accurate data support can be provided, in order to fully utilize information of the nuclear magnetic HMBC spectrum, the configuration of the sample is reasonably analyzed, the result is consistent with the chemical structure of the sample, the crystallinity of the sample is verified by X-ray powder diffraction, and the melting point and the thermal stability of the sample are represented by thermal analysis.

An apparatus for securing a medical device is provided. The device for fixing the medical equipment comprises a base for supporting the medical equipment; one end of the support is connected to the base, and the other end of the support extends in the direction away from the base; the cover body assembly is movably connected to the other end of the support and can move back and forth between a first position and a second position different from the first position relative to the support in the extending direction of the support; the cover body assembly covers at least part of the base in the moving process and is matched with the base and the support to form a limiting cavity. When the cover body assembly moves to the first position, the limiting cavity is configured to fix the medical equipment, and when the cover body assembly moves to the second position, the limiting cavity is configured to unlock the medical equipment. According to the device for fixing the medical equipment, the fixing mode of the medical equipment is simple, operation is convenient and fast, and a user can conveniently see the information displayed on the display surface and conduct operation.

The present application relates to the field of urban public transportation technology, and in particular to a bus service method, system, terminal and storage medium based on intelligent transportation, aiming to solve the defect that the dispatching method in the prior art ignores the road condition information of the vehicle, resulting in the difficulty of the vehicle to be on time. The technical solution is: a bus service method based on intelligent transportation, including pre-establishing a bus geographic information system; obtaining the train information of all bus routes in the city, and marking all the stations in the bus routes; obtaining real-time traffic data in the city, estimating the travel time between adjacent stations in the bus routes; adjusting the vehicle dispatching plan; obtaining the real-time driving status of the vehicle and the operation information of the on-board equipment; updating the vehicle dispatching plan. The present application has the effect of referring to the actual road condition information when dispatching the bus, so as to improve the rationality of the vehicle dispatching.

The invention discloses an integrated device for percutaneous minimally invasive extracorporeal reduction of vertebral fractures, comprising a track, a reduction arm, a hollow screw sleeve and an extended hollow screw; the track is provided with a length scale; the reduction arm connects the track and the extended hollow screw sleeve, the extended hollow screw is sleeved in the hollow screw sleeve, and the distal end of the extended hollow screw is designed as a spiral blade or a thread. The device combines the advantages of good reduction effect of traditional open reduction and internal fixation of thoracolumbar fractures with the advantages of PKP or PVP surgery in terms of immediate pain relief and rapid reconstruction of the stability of the injured vertebra, and achieves good correction of the physiological curvature of the spine, relieves pain and restores the function of the spine under the premise of minimally invasive, simple, safe and effective surgery.

The present invention discloses a box test device for a model carrier pile, comprising a box frame system, a jack loading system arranged above the box frame system, and a sleeve system located in the box frame system. The present invention also discloses a box test method for a model carrier pile, wherein a soil layer is buried in the box frame system to a first preset depth; a sleeve system is placed in the box frame system, and the soil layer is continuously buried to the casing opening; gypsum mixed sand is used as a filling carrier filler to be filled into the casing; a jack loading system is used to pressurize a long rammer to tamp the carrier filler in the casing until it is compacted; a steel cage is placed in the casing, concrete is poured, and the casing is pulled out while pouring; after the pile in the casing is formed, the soil layer is peeled from top to bottom, and samples are taken layer by layer to determine the dry density, and the carrier pile forming condition is observed and analyzed. The present invention performs a full pile simulation test on the carrier pile to improve the referenceability of the carrier pile simulation experiment.

The present invention discloses a gluing device that is easy to disassemble and assemble, comprising a support plate, a material storage box is fixedly connected to the upper surface of the support plate, a feed pipe is fixedly connected to the right side of the material storage box, a discharge pipe is fixedly connected to the right side of the material storage box, a gluing pipe is fixedly connected to the upper surface of the material storage box, a base is fixedly connected to the upper surface of the material storage box, a first electric push rod is fixedly connected to the upper surface of the base, a fixed plate is fixedly connected to the output end of the first electric push rod, and a card slot is provided on the front and back of the fixed plate. The gluing device that is easy to disassemble and assemble performs preliminary positioning of the positioning plate through the cooperation of the card block and the card slot, and reinforces the positioning plate through the cooperation of the buckle ring and the fixing hook, avoids the use of bolts and nuts for fixing, improves the convenience of disassembly and assembly, not only improves the gluing efficiency, but also saves the time of the staff and improves the work efficiency of the staff.

The present invention discloses a universal precision acetabular cup nail remover, comprising a handle, a connecting rod is arranged on one side of the handle, the connecting rod is hollow inside, a nail removing rod is arranged in the connecting rod, a rear fork is arranged on the end of the nail removing rod that passes through the outside of the connecting rod, a front fork is arranged on the side of the rear fork away from the connecting rod, the rear fork and the front fork are connected by a hinge structure, a first edge bulge is arranged on the side of the rear fork facing the front fork, a second edge bulge is arranged on the side of the front fork facing the rear fork, a resistance spring is arranged between the first edge bulge and the second edge bulge, a nail removing head is arranged on the end of the front fork away from the rear fork, the head of the nail remover disclosed by the present invention is rotatable, which is convenient for doctors to accurately align the screws of the acetabular cup and solves the problem that the nail remover is difficult to operate, the resistance spring gives a resistance to the hinged structure, so that the head of the nail remover has a certain resistance when rotating, thereby enhancing the hand feel of the user, and thus quickly and accurately positioning the screw position of the acetabular cup.

The utility model discloses a river area surface water seepage inhibition effect test device which comprises a test box, a soil body is arranged in the test box, a river channel is formed in the soil body, a river channel outlet is fixedly connected to the side wall of one side of the test box, a river channel inlet is fixedly connected to the side wall of the other side of the test box, and the river channel inlet is fixedly connected to the side wall of the other side of the test box. The riverway inlet and the riverway outlet correspond to the riverway in position, and the riverway inlet and the riverway outlet penetrate through the side wall of the test box and are communicated with the riverway. The device is simple in design and manufacture, convenient and fast in test process, easy to operate and simple in test principle, the water stop effect of the waterproof curtain manufactured under different construction process conditions is evaluated, the final evaluation mode is simple, visual and effective, the inhibition effect of seepage stopping measures on underground water seepage can be well reflected, and the method is suitable for popularization and application. And the method can play a good role in guiding and referencing practical engineering.

The invention relates to the technical field of virtual simulation, in particular to a virtual simulation practical training system and method for a scientific experiment, and the system comprises a display module which is used for receiving user information and displaying the experiment information of a user; the selection module is used for enabling a user to select any experiment name in the experiment information and generating an experiment information result corresponding to the experiment name; the acquisition module is used for acquiring a security level and a security operation specification; the experiment display module is used for displaying safety operation specification requirements, standard operation steps, error experiment results, experiment equipment and experiment articles corresponding to any experiment name selected by the user; and the experiment comparison module is used for judging and correcting the actual operation steps of the user according to the comparison result. According to the method, the problem of low experiment efficiency is solved through step correction in the experiment process.

The utility model relates to the technical field of underground engineering building construction, in particular to a water-rich stratum shield tunnel face soil cabin pressure range testing device which comprises a test box, a soil body and a pneumatic pump, a shield tunnel is installed on the side face of the test box, and a shield cutter head is inserted into the shield tunnel. A soil cabin is arranged in the shield cutter head, a tunnel face is arranged on the surface of the shield cutter head, an air pressure sensor is fixedly installed in the soil cabin, an optical fiber displacement sensor is attached to the tunnel face, the output end of the air pressure pump is fixedly connected with a pipeline, and one end of the pipeline is communicated with the soil cabin. In the test process, the pressure in the fixed shield soil cabin is set through the pneumatic pump, the deformation and air pressure value of the tunnel face are recorded according to the displacement and air pressure sensor when the air pressure is stable, then the quantity value of the pneumatic pump is adjusted for many times, the quantity value of the displacement and air pressure sensor is recorded, and an air pressure-displacement curve is drawn. And giving a suitable pressure range of the shield tunnel soil cabin according to a curve result.

The application discloses a crane vibration monitoring method, an intelligent control method and application, and is characterized in that when a crane starts a work starting signal, the work parameters of the crane are recorded, vibration data of each equipment area of the crane and position data of the crane are also recorded correspondingly, work monitoring data, vibration monitoring data and position monitoring data are correspondingly generated, the vibration monitoring data of the crane is judged, when the vibration monitoring data points to an exception, the work monitoring data and the position monitoring data can be output synchronously to assist maintenance personnel in fault judgment and fault reproduction, the application further counts the exception records to generate exception count information, judges the correlation of the exception count information, and outputs exception record prediction information to assist the maintenance personnel in troubleshooting and judgment during routine maintenance, so that crane faults can be prevented in advance and targeted maintenance can be performed.

The present invention discloses a method and system for managing the battery charging state of a new energy vehicle based on artificial intelligence, and the method includes data collection, data preprocessing, charging demand prediction, charging strategy optimization and charging safety management. The present invention relates to the technical field of battery management for new energy vehicles, and specifically refers to a method and system for managing the battery charging state of a new energy vehicle based on artificial intelligence. The present solution adopts a battery charging state management method that combines long-term and short-term charging demand prediction with charging strategy optimization. By comprehensively predicting the demand for battery charging and the specific strategy for battery charging, and considering the user's personal charging strategy, the intelligence and feasibility of the method are improved; an integrated classification method combining modal decomposition time series convolution and long-term and short-term memory is used to predict charging demand; and a reinforcement learning method for multi-objective optimization of charging strategy is used to optimize charging strategy.

The utility model relates to the technical field of terminal equipment, in particular to an eccentric rotating structure, which comprises a fixing rod, a rotating shaft, a rotating shaft and a rotating shaft, a sliding groove is formed in the shell face of the shell, and the shell is connected with the fixing rod in a sliding mode along the arc track through the sliding groove; wherein the circle center of the arc track deviates from the outer side of any position of the fixing rod; a fixing rod is arranged in the shell, a pressing plate is further installed in the shell, and a driving assembly used for driving the shell to rotate along the fixing rod is arranged on the pressing plate. In this way, the size of the product is reduced, the product is lighter and more attractive, and in some small electronic products, the eccentric rotating structure not only has remarkable advantages in space utilization, but also has the advantage of simplicity in overall assembly.

This invention provides a deep learning-based method and system for registering three-dimensional multi-modal medical images, comprising: acquiring and processing point cloud data; extracting feature points of different modalities of medical images from the processed point cloud data using a deep learning network; pre-registering the feature points to determine the output positions of the different modalities of medical images; and optimizing the registration results of the pre-registration through threshold point cloud registration and point cloud segmentation registration. This invention addresses the issue of differences in imaging effects and imaging areas among different modalities of medical images, where the initial three-dimensional spatial positions are far apart. It can combine medical images of different modalities and perform three-dimensional registration, displaying them in the same area to assist medical personnel in making better diagnostic references. The method blocks are designed to be dynamically adjusted according to different scenarios and needs, enabling better application to different branches of medicine.

The application discloses an automatic color matching system for coffee bean roasting and relates to the technical field of coffee bean color value detection. The automatic color matching system for coffee bean roasting comprises a collecting device for collecting coffee beans placed in a container, a supporting device arranged on one side of the collecting device and used for receiving and supporting the coffee beans collected by the collecting device, and a color matching device arranged on one side of the supporting device and used for judging the color value of the coffee beans on the supporting device. The color matching device comprises a detection member and a control module connected with each other. The control module is used for being connected with a coffee bean roasting equipment, the detection member is used for detecting the color value of the coffee beans on the supporting device, and the control module controls the start and stop of the coffee bean roasting equipment in response to a detection signal of the detection member. The application can make the color value of the coffee beans reach a target requirement.

The invention relates to a method for realizing asynchronous mediation of contradictory disputes based on instant messaging. The method comprises the steps of user identity verification, asynchronous mediation request initiation, mediation information collection and arrangement, asynchronous mediation communication, mediation process tracking and management, mediation result confirmation, data encryption, safety guarantee and the like. The method has the following advantages: the asynchronous mediation mode is adopted, the mediation flexibility is improved, the mediation cost is reduced, the data encryption and security protection mechanism is introduced to enhance the information security, the message recording and archiving functions of the instant messaging tool are utilized to realize the whole-course tracking and automatic management of the mediation process, and the mediation efficiency is improved. And multiple communication forms are supported, so that the interactivity and flexibility of the mediation process are improved, the success rate of mediation is improved, and result confirmation and archiving are facilitated. According to the invention, based on the instant messaging technology, through effective technical step design and process management, the flexibility and efficiency of the dispute mediation process are significantly improved, and the information security is enhanced at the same time.

The present invention discloses a pneumonia analysis and intelligent information recommendation method and system based on a knowledge graph, based on the health big data of historical pneumonia patients and constructing a pneumonia knowledge graph, and obtaining target-related knowledge data related to pneumonia of target personnel; data classification is performed on the target-related knowledge data, and the classification process performs feasibility analysis of pneumonia pathology for each group of data, and multiple classification results are screened based on feasibility to obtain multiple groups of patient-related data; pneumonia TCM diagnosis data data are collected, and a pneumonia TCM diagnosis large model is constructed based on a preset language model, and multiple groups of associated data are imported into the large model for TCM diagnosis schemes, and multiple groups of diagnosis and treatment schemes are formed. The present invention recommends data in multiple dimensions based on the knowledge graph, and the diagnosis and treatment recommendation information has a better reference significance, which can greatly improve the medical auxiliary level of the system.

The invention discloses a cold-resistant camellia fragrant flower excellent clonal breeding method, and belongs to the technical field of plant breeding. The method comprises the following technical steps: (1) seed selection and forest stand construction; (2) primary selection of excellent single plants; (3) high-quality single plant re-selection; (4) evaluating economic characters of the fruits; (5) evaluating cold resistance; and (6) final selection of excellent single plants. According to the method, the excellent clone of the cold-resistant camellia fragrant flower oil tea is bred after the third year of afforestation, the variety selection rate is high, and the breeding period is short. The method disclosed by the invention is simple to operate, reliable in result and capable of objectively, effectively and accurately breeding excellent single plants with excellent fruit economic characters and strong cold resistance, and has very good reference and application values for variety breeding of camellia oleifera and improvement of breeding efficiency.

The invention discloses a metal roof construction method based on a BIM technology, and relates to the technical field of building construction. Comprising the steps of 1, obtaining a drawing of each node of a metal roof; 2, drawing a metal roof node model according to the drawing of each node of the metal roof; 3, constructing a metal roof engineering three-dimensional model and a node construction installation video according to the metal roof node model; 4, the node construction and installation videos are embedded into the three-dimensional model of the metal roof project, and the corresponding node construction and installation videos are played according to the construction nodes of the metal roof project. The method has guiding significance for metal roof construction and installation, installation video files of all nodes of a metal roof project are provided through the BIM technology, construction is completed through guidance of technical personnel according to the video files, and the standardization of metal roof construction is ensured.