44 results about "Experimental research" patented technology

The invention provides a method for identifying a microscopic association body structure in a heavy oil molecule simulation trajectory, which comprises the following steps of: analyzing a molecular dynamics trajectory, identifying an aromatic ring structure in a heavy oil molecule component, calculating a geometric center of the aromatic ring structure, combining a periodic boundary condition, and applying an improved DBSCAN clustering algorithm to realize automatic identification and clustering of an association body; and performing post-processing optimization on the clustering result, merging the shared clusters to generate a final association body set, and analyzing the number, size distribution, morphological characteristics and dynamic evolution information of the association bodies based on the structural characteristics of the final association body set. The method can accurately capture pi-pi accumulation behaviors of heavy oil molecules, further reveals morphological characteristics and dynamic evolution laws of heavy oil microassociates and influences of the heavy oil microassociates on the apparent viscosity of heavy oil, provides theoretical support for heavy oil viscosity-causing mechanism analysis and viscosity reducer design, can complement experimental research, and has a wide application prospect. And efficient development and green utilization of a complex thickened oil system are promoted.

The invention relates to a reservoir compressibility evaluation method and system considering shale formation development characteristics, and belongs to the field of shale oil and gas development geology. Comprising the following steps: 1, performing experimental research on the influence of shale formation development characteristics on mechanical properties; 2, researching the influence of the shale formation on the tensile property; 3, researching the influence of the shale formation on the compressive property; step 4, performing a longitudinal fracturing fracture network layer-crossing physical simulation experiment considering the strata stress barrier belt; 5, longitudinal fracturing crack net layer-penetrating finite element numerical simulation considering the strata stress barrier belt is carried out; 6, researching the influence rule of the lamina development characteristics on the hydraulic fracture crossing behavior; 7, establishing a fracturing performance evaluation index of the shale reservoir; and step 8, evaluating the combination distribution position of the dominant lamina of the target block and the compressibility of the reservoir. According to the method, the reserve utilization rate, the recovery rate and the yield rate of shale gas development are maximized, and theoretical basis and technical support are provided for efficient development of shale gas reservoirs.

The invention belongs to the technical field of mining engineering safety, particularly relates to an experimental research method for coal rock impact dynamic disasters of a filling prevention and control working face, and aims to solve the problem that the sudden fracture process of overlying strata is difficult to reproduce in the traditional coal mine impact dynamic disaster research. A PCL material is heated, an asbestosed wire gauze is drawn out, a drop hammer falls in an iron pipe, a two-dimensional similar simulation experiment platform for instantaneous fracture of the overlying hard roof of the coal seam is constructed, gravitational potential energy is converted into impact kinetic energy through impact of falling of the drop hammer, and coal rock stress mutation is induced. The method comprises the following steps: simulating the instantaneous caving condition of a top plate in an overlying strata structural instability state, and capturing the whole process of dynamic interaction of a filling body-coal rock system under a coal rock impact dynamic disaster by combining a sensor and a monitoring system; meanwhile, a filling material is introduced to support the goaf, coal rock bearing pressure experimental data before and after goaf filling are compared, and the protection effect of the filling material on the coal rock under the condition of instantaneous collapse of the overlying roof is studied.

In order to solve the problem of accurate simulation of sandstone fracture evolution and dynamic crystallization in geotechnical engineering experiment monitoring, the invention provides a sandstone internal dynamic crystallization controllable system and method based on force-flow coupling driving, and four defects of out-of-control crystallization position, confining pressure distortion, transportation blockage and monitoring limitation are solved. The system integrates core packaging, solution conveying, stress applying, crystallization restraining and fracture monitoring functions. A core packaging unit adopts a molecular sieve composite membrane to reduce interference, and an annular ERT electrode realizes millimeter-level fracture positioning; the capillary transport unit drives the solution to be directionally transported by using gradient ceramic layer aperture gradual change; the axial loading module realizes uniform confining pressure through cooperation of a weight and an elastic film; dry nitrogen is introduced into the evaporative crystallization module to constrain the crystallization range. The method comprises the steps of packaging, communication, solution injection, stress application, crystallization control and crack monitoring. A reliable platform is provided for complex engineering scene fracture evolution research, the experimental research range is expanded, and the correlation research comprehensiveness of sandstone is improved.

The application discloses a modeling and simulation method for surface morphology fractal growth of a nano-silver flexible film, and steps are as follows: 1, establishing a nano-silver flexible film surface morphology fractal growth model conforming to the surface morphology fractal growth of the nano-silver flexible film; 2, calibrating parameters of the model according to electron microscope scanning image data of the nano-silver flexible film obtained through experiments; and 3, verifying effectiveness and applicability of the model for simulating the surface morphology fractal growth of the nano-silver flexible film by using a morphology fractal dimension measurement technology.The model for the surface morphology fractal growth of the nano-silver flexible film can quickly simulate the surface morphology growth process of the nano-silver flexible film prepared by an in-situ reduction method, and can simulate the surface morphology fractal growth process of the film under different silver ion concentrations and reduction reaction time parameters.The simulation result of the model can guide experimental research on preparation of the nano-metal flexible film and accelerate the optimization speed of the preparation process.

The invention discloses a method for establishing a mouse radioactive jawbone injury animal model, which comprises the following steps of: performing tooth extraction operation, performing radiation treatment after one day, and performing Micro-CT (Computed Tomography) scanning, intraoral examination and histopathologic detection on the lower jawbone on the thirteenth day after radiation so as to determine that the radioactive jawbone injury mouse model is successfully constructed. The animal model has the advantages that the pathological process of human early radioactive jaw necrosis is accurately simulated; the model is stable, good in repeatability and suitable for large-scale experimental research; and a reliable, short-cycle and convenient-to-operate animal model is provided for the mechanism research of radioactive jaw necrosis and the development of new drugs.

This invention discloses a method for preparing a Ti-Mo-Cr alloy diffusion couple without stress-induced phase transformation, belonging to the field of titanium alloy diffusion technology. This invention utilizes hot isostatic pressing (HIP) technology, selecting appropriate process parameters to prepare diffusion couples with both ends being single-phase, exhibiting good adhesion and free from stress-induced phase transformation. On the one hand, this invention allows for the preparation of diffusion couples that meet experimental requirements by adjusting process parameters, thus enabling effective subsequent experimental research and avoiding blindly setting experimental parameters. On the other hand, it allows for precise control, greatly avoiding the occurrence of stress-induced phase transformation or gaps at the diffusion couple interface due to inaccurate parameter control during fixture preparation, which could lead to experimental failure. This invention enables the preparation of diffusion couples that conform to diffusion concentration gradient experiments, which can be used for subsequent electron probe microanalysis to further solve for the diffusion coefficient, facilitating the establishment of a titanium alloy diffusion kinetics database.

The application discloses a target plate clamping device and relates to the technical field of aircraft anti-penetration performance experimental research, which comprises a supporting seat, at least one pair of oppositely arranged fixing bosses, at least one pair of oppositely arranged loading blocks and adjusting bolts. The supporting seat has a first surface. The fixing bosses are fixed to the first surface, and each fixing boss is provided with a first through hole in the direction of opposite arrangement. The opposite arrangement direction of each pair of loading blocks is parallel to the opposite arrangement direction of the corresponding pair of fixing bosses. Each pair of loading blocks is located between the corresponding pair of fixing bosses, and each pair of loading blocks is movably attached to the first surface in the direction of opposite arrangement. An installation hole is formed in the loading block in the direction perpendicular to the first surface. A threaded hole is formed in the end of the loading block close to the adjacent fixing boss. The adjusting bolt is screwed through the first through hole and is screwed with the threaded hole. The adjusting bolt is used for driving the loading block to move so as to apply a force to the target plate.

This invention discloses a method for eliminating stress-induced phase transformation during the preparation of diffusion couples in Ti-V-Mo alloys, belonging to the field of titanium alloy diffusion technology. This invention utilizes spark plasma sintering technology, selecting appropriate process parameters to prepare diffusion couples with both ends being single-phase, exhibiting good adhesion and free from stress-induced phase transformation. On the one hand, this invention allows for the preparation of diffusion couples that meet experimental requirements by adjusting process parameters, thus effectively facilitating subsequent experimental research and avoiding blindly setting experimental parameters. On the other hand, it allows for precise control, greatly reducing experimental failures caused by inaccurate parameter control during fixture preparation. This invention enables the preparation of diffusion couples that conform to diffusion concentration gradient experiments, which can then be used for subsequent electron probe microanalysis to further solve for the diffusion coefficient, facilitating the establishment of a titanium alloy diffusion kinetics database.

The invention discloses a grating sensor performance parameter experimental research device which comprises an aluminum alloy fixing plate and further comprises a first displacement table fixing base and a second displacement table fixing base which are located at the top of the aluminum alloy fixing plate, and a first translation assembly, a second translation assembly and a frame body assembly are arranged at the top of the aluminum alloy fixing plate; according to the grating sensor performance parameter experimental research device, CCD imaging changes after the distance of the structure is adjusted, the influence of grating sensor performance parameters on imaging results is researched by observing CCD image changes, and the problem that the grating sensor performance parameters are lack of experimental research is solved; a foundation is laid for research and development of high-precision, high-resolution and quick-response grating measurement products, and the practical requirements of grating sensor research and development are met.

The application provides a method for identifying micro-aggregate structure in a heavy oil molecule simulation trajectory, which comprises the following steps: analyzing a molecular dynamics trajectory, identifying aromatic ring structures in heavy oil molecular components and calculating geometric centers of the aromatic ring structures, combining periodic boundary conditions, and applying an improved DBSCAN clustering algorithm to realize automatic identification and clustering of the aggregates; the clustering results are post-processed and optimized, the final aggregate set is generated after merging and sharing clusters, and the number, size distribution, morphological characteristics and dynamic evolution information of the aggregates are analyzed based on the structural characteristics of the aggregates. The method can accurately capture the pi-pi stacking behavior of heavy oil molecules, and further reveal the morphological characteristics, dynamic evolution law of heavy oil micro-aggregates and the influence of the micro-aggregates on the apparent viscosity of heavy oil, thereby providing theoretical support for the analysis of the viscosity-causing mechanism of heavy oil and the design of viscosity reducers, and complementing experimental research, and promoting the efficient development and green utilization of complex heavy oil systems.

The application discloses a method for constructing a digital rock gene library based on massive experimental data, and comprises the following steps: collecting different typical rock samples, carrying out relevant experimental research, obtaining relevant experimental data of the typical rock samples, and processing the relevant experimental data to form rock standardized data; collecting typical geological disaster data occurring in history and processing the geological disaster data to form historical disaster standardized data; collecting real-time dynamic monitoring data of the current geological disaster; and fusing and analyzing the three kinds of heterogeneous data sources and uniformly processing the three kinds of heterogeneous data sources to form the digital rock gene library. The application adopts the three kinds of heterogeneous data sources to construct the digital rock gene library, makes up for defects that data is incomplete and methods are single in the existing rock mechanics field, and leads to different analysis results, has strong broad-spectrum and high accuracy.

The invention belongs to the technical field of plant disease prevention and control, and particularly relates to application of epicatechin and protocatechuic acid in prevention and control of citrus huanglongbing. Through systematic experimental research and application verification, it is found that epicatechin and protocatechuic acid can remarkably inhibit the number of citrus huanglongbing pathogenic bacteria, have a good synergistic effect, can remarkably improve the overall health condition of citrus trees and have excellent application prospects and popularization value. As epicatechin and protocatechuic acid have the characteristics of being natural, environment-friendly and efficient, the epicatechin and protocatechuic acid show important application potential in the field of prevention and treatment of the citrus huanglongbing, and are expected to become novel key tools in the field. The discovery not only provides a new thought for green prevention and control of the citrus huanglongbing, but also provides powerful technical support for sustainable development of the global citrus industry, and is of great significance for guaranteeing stable development of the industry.

The present disclosure provides a wellbore instability analysis method based on big data, which relates to the field of wellbore instability. The wellbore instability prediction based on big data analysis and deep learning, combined with existing wellbore instability theory and experimental research results, finds the main control factors and related factors of wellbore instability in the studied block. Based on data classification, a big data model is established to improve the accuracy of analysis and prediction through big data learning. Through the application of the big data model, the deep learning technology is used for regional wellbore instability evaluation and research, and finally the regional wellbore instability evaluation and prevention technology based on big data is formed. The wellbore instability analysis tool based on big data analysis mainly provides the safety density window for preventing wellbore instability, the control analysis of hole diameter change, the optimization of drilling fluid performance and additive dosage, adjacent well data analysis, ECD analysis and drilling time effect analysis through data analysis, so as to reduce the hydration swelling effect of the target formation rock and prevent wellbore instability. The present disclosure is suitable for wellbore instability prediction.

The invention relates to a bacterial colony intelligent analysis method and device based on deep learning and a storage medium, which are applied to the technical field of microbiological detection and image analysis, and comprise the steps of performing model optimization on the characteristics of a bacterial colony image based on a YOLOv11 deep learning model in combination with a transfer learning method, remarkably improving the accuracy and robustness of bacterial colony detection, and improving the accuracy and robustness of bacterial colony detection. The problems of missing detection and false detection caused by overlapping of bacterial colonies, various forms and complex backgrounds can be effectively solved; the method supports the simultaneous recognition and classification statistics of a plurality of bacterial colonies, automatically generates a structured Excel report containing rich information, does not need manual secondary data arrangement, improves the standardization and traceability of bacterial colony analysis, and provides reliable data support for experimental research and detection evaluation. The full-process automation of bacterial colony detection, classification, counting and report generation is realized, manual intervention is not needed, the labor intensity of workers is greatly reduced, the bacterial colony analysis efficiency is improved, and the high-throughput detection requirement is met.

This invention relates to a base for ex vivo mouse brain slices with a specific angle and its design method, belonging to the field of design and manufacturing technology of life science experimental research equipment. It includes a hollow cylinder with a beveled surface on one side, the beveled surface having a specific angle, i.e., the angle between the inclined surface and the horizontal base is a specific value for the experimental research; the inner radius of the hollow cylinder is 5mm, the thickness is 0.5mm, and the total height is 20mm. This invention has a simple structure, low cost, is suitable for ex vivo mouse brains in a normal state, and allows for convenient and rapid replacement. It is reusable and can meet the needs of researchers, obtaining the target slice area and ensuring that the ex vivo brain slices contain the complete neural pathways required for the research.

The invention provides an equiaxial residual stress prediction method based on an indentation technology. Simulation software is used for conducting finite element simulation on various material parameter combinations under the stress-free condition and the material indentation process in different residual stress states, the influence rules of material mechanical property parameters and residual stress on a load-displacement curve are analyzed, and indentation characteristic parameters are extracted. Based on the laws, the invention provides a material mechanical property inversion identification method and a residual stress prediction model which do not need to know the material mechanical property and are fused with finite element simulation and a machine learning algorithm. The prediction method is formed by constructing a mapping relation among the indentation response, the material parameters and the residual stress and combining an inversion analysis means. According to the method, the mechanical property and residual stress of the material can be accurately predicted, the prediction error is small, and reliable technical support is provided for experimental research and engineering application.

The present invention discloses a method for establishing and verifying a theoretical model of an assembled elastically cured track bed track structure, comprising establishing a rail model, a sleeper model, a composite unit block model, an adjustment layer model, and a lower foundation model; assembling the adjustment layer model onto the lower foundation model, assembling the composite unit block model onto the adjustment layer model, assembling the sleeper model onto the composite unit block model, and assembling the rail model onto the sleeper model; connecting a spring model between the rail model and the sleeper model for simulating a fastener system and backfilling gravel; and assigning material parameters to obtain a theoretical model of an assembled elastically cured track bed track structure. The present invention can solve the problem of a lack of theoretical and experimental research methods for the service status of assembled elastically cured track beds in the prior art, achieve the purpose of establishing and verifying a theoretical model of an assembled elastically cured track bed, and provide scientific support for the research and promotion of assembled elastically cured track bed track structures.

The invention relates to a preparation method of a composite film state oil and gas reservoir visual model and application of the obtained model, in particular to the technical field of petroleum development and research, and the preparation method comprises the following steps: obtaining model parameters having a similar relationship with actual oil and gas reservoir parameters according to a similarity criterion; constructing a visual physical model of the complex membrane state strong heterogeneity oil and gas reservoir according to the model parameters having the similar relationship with the actual oil and gas reservoir parameters; wherein the similarity conditions of the model parameters obtained according to the similarity criterion comprise model geometric similarity, model boundary condition similarity, reservoir feature similarity, injection-production parameter similarity, fluid physical property similarity and oil-gas miscible state similarity. According to the method provided by the invention, the geologic structure, the fluid physical property and the mining condition of the complex membrane state strong heterogeneity oil and gas reservoir are simulated by virtue of a similarity principle, the obtained model can be used for a displacement experiment, and an effective model preparation method is provided for experimental research on development of the complex membrane state strong heterogeneity oil and gas reservoir.

The invention discloses a manufacturing method for a layered slope building block, relates to the technical field of layered slope simulation experiments, and aims to provide a precondition for tamping the building block by stirring matched similar materials to be in a wet and loose pellet state. And then the uniformly mixed similar materials are poured into the forming die box twice or multiple times and are flatly paved, so that the interiors and the surfaces of the building blocks can be uniformly tamped, the problems of local overpressure damage or non-uniform compactness and the like are avoided, and the excellent tamping effect of the building blocks is ensured. The building block tamping method has the advantages of being easy and convenient to operate, controllable in effect and high in consistency, through standardized steps and quantitative control, the uniform tamping and compacting effect of the thin-layer similar material building blocks can be guaranteed, the consistency of the mechanical properties of all the building blocks in the batch manufacturing process can be guaranteed, and the construction efficiency is improved. Efficient and stable technical support is provided for experimental research and engineering application, and the building block preparation quality and efficiency are remarkably improved.

The present application relates to a kind of ore-forming fluid transport and accumulation process simulation experimental device and method, belong to deposit geological technical field.The device is used to simulate the migration path of ore-forming fluid in the internal fault fold structure, transport and accumulation process, the spatial distribution of the formation of ore body / mineralized zone and ore-forming characteristics, explore the occurrence regularity of the internal structure system of ore body / mineralized zone, provide theoretical reference for actual ore body mining.Through systematic experimental research, more comprehensive and profound understanding is provided for deposit geological theory research and practical operation.In actual mineral exploration and development, the use of this simulation device helps to analyze and predict favorable exploration targets and target area, and provides more scientific and reliable technical support for mineral exploitation.

The invention discloses an experiment teaching system and method based on computer vision and sensor technology, and relates to the technical field of experiment teaching. According to the invention, definition and coverage support are carried out on multi-modal digital experiment contents, including implementation of experiment videos, experiment data, experiment courseware and experiment blackboard writing; the experiment teaching complexity of teachers is reduced, and the experiment classroom information transmission efficiency is effectively improved; on the basis of realizing a synchronous experiment process and data traceability, data fusion and intelligent inference are realized, and subjectivity and one-sidedness of evaluation in a current experiment operation process are solved; application mode derivation under various topologies is provided, and various experiment teaching scenes are covered; the system can be widely applied to the fields of experiments and related education, such as science education in a primary school stage, science teaching in a middle school stage, experiment operation evaluation, practical teaching in a vocational education stage, experiment research in colleges and universities and the like, and has great social influence and practical significance.

The application discloses an experimental device and experimental method for studying the disturbance of particle suspension caused by cleaning behavior, relates to the technical field of building environment, intelligent control and airflow solution model, and comprises a conveying device, a reciprocating cleaning device, a material supply device, a power unit, a control system, a data recording system and a storage system. The application can complete the experimental research on the disturbance of particle suspension caused by the cleaning behavior of particles through a simple control system, and can satisfy the experimental scheme requirements under various working conditions by programming the control system and replacing the reciprocating cleaning device, thereby providing convenience for the experimental research on the disturbance of particle suspension caused by the cleaning behavior. In addition, the application can automatically control after the experimental working condition and parameters are determined, thereby effectively reducing the workload of manual operation while ensuring the experimental efficiency and accuracy.

The invention discloses an application of NPVF in promoting the food intake of fishes. The application comprises the following steps: 1, cloning an NPVF precursor gene; 2, analyzing the information of the precursor gene; and 3, carrying out experimental analysis on the influence of the NPVF on the food intake of acipenser baerii and the expression quantity of an appetite regulation factor by adopting an intraperitoneal injection method. The NPVF precursor gene is cloned and subjected to biosignal analysis, the influence of the NPVF precursor gene on promoting feeding of the Siberian sturgeons is subjected to experimental research, and an efficient culture scheme is provided for aquaculture of the Siberian sturgeons, so that various metabolic diseases caused by insufficient energy intake in the development process of offspring seeds are avoided, the growth and development of the offspring seeds are promoted, and the survival rate of the offspring seeds is increased. Wide application prospects are realized.

The present application belongs to the technical field of geochemistry research in the field of petroleum exploration and development, and discloses a method for analyzing the causes of hydrogen sulfide in offshore oilfields and a method for experimental research on treatment measures, which effectively solves the problems of repeated work, logical confusion and the like in the causes and treatment of hydrogen sulfide in offshore oilfields. The method for experimental research on the causes of hydrogen sulfide in offshore oilfields comprises: (1) oil and gas source analysis; (2) discrimination of the causes of thermal chemical reduction of sulfate; (3) discrimination of the causes of thermal cracking of organic matter; (4) discrimination of the causes of microbial sulfate reduction; and (5) discrimination of the causes of thermal recovery. Different treatment measures are adopted according to different causes of hydrogen sulfide. The present application can accurately and reliably determine the causes of complex hydrogen sulfide in offshore oilfields by using various experimental analysis methods and simultaneously establishing a systematic research and analysis process.

The application belongs to the technical field of material dynamic mechanical property experiment clamp and provides a die device for impact forming experiment research of horizontal plate sample on a Hopkinson bar, which comprises a supporting part and an impact die part; the supporting part comprises a cushion block for placing the impact die part; the impact die part comprises a left impact die, a left pressing plate and a right pressing plate which are arranged on the cushion block correspondingly; the left pressing plate is located between the left impact die and the right pressing plate; and the left impact die is used for contacting with an incident rod of the Hopkinson bar. The die device for impact forming experiment research of horizontal plate sample on the Hopkinson bar has ideal use effect for impact forming experiment of difficult-to-deform plate materials under high strain rate.

The utility model relates to the technical field of chemical experiments, and discloses a green integrated experimental research instrument which comprises a plastic bottle, a bottle cap is in threaded connection with a bottle opening of the plastic bottle, a first injector is arranged on the left side of the upper end of the bottle cap, and a second injector is arranged on the right side of the upper end of the bottle cap. A first communicating pipe is fixedly connected to the middle of the upper end of the bottle cap, a first connecting piece is arranged at the bottom end of the first communicating pipe, and the bottom of the first connecting piece communicates with four second communicating pipes. According to the utility model, greenization, integration and miniaturization can be realized. The device can complete SO2 preparation, SO2 oxidability, reducibility, bleaching property, water solubility and other experiments at a time in a closed environment, the number of used medicines in the experiments is small, a series of SO2 property experiments can be completed by using a small amount of medicines, the miniaturized experiment concept is embodied, and meanwhile, a comparison experiment of SO2 and a BaCl2 solution is added in the experiment.

The invention discloses a rock impact test method considering cyclic damage history, which comprises the following steps: (1) under a preset quasi-static graded cyclic loading-unloading path, selecting an impact insertion opportunity according to a dimensionalized cyclic phase; (2) realizing a target dynamic strain rate and peak stress by adopting pulse shaping and energy calibration; (3) carrying out data processing by using a three-wave method and static-dynamic energy decomposition; (4) taking force balance and strain rate stability as receiving criteria; and (5) constructing a unified evaluation framework of the coupling energy index and the damage variable so as to obtain the strength / rigidity degradation, energy dissipation and damage mode evolution law of the material under the combined action of multiple cycle history and transient impact. According to the method, only the process and parameter control are limited, the specific device structure is not limited, and the method has the advantages that the process can be copied, parameters can be traced back, and indexes can be quantified, and is suitable for experimental research and standardized comparison of stability and impact resistance evaluation of underground engineering surrounding rocks.

The invention belongs to the field of safety culture education, and particularly discloses a safety culture construction teaching experiment research method and system. The system is based on a modular design framework, five core experiment modules are constructed around accident case analysis, safety culture similarity and similarity comparison, training design, carrier design and evaluation indexes, and functions of accident cause '2-4' model analysis, safety culture element diagnosis and improved strategy design are integrated. The system supports multi-level authority management, the learning depth is ensured through an experimental task point forced completion mechanism and page shortest dwell time limitation, and teaching closed-loop management and dynamic feedback are realized by combining automatic generation of an experimental report, intelligent scoring of after-class exercises and multi-dimensional data statistics of a teacher end. Through a mixed teaching mode and interactive task design, the internalization ability of students to the safety culture theory is effectively improved, the systematic analysis and practical innovation ability of enterprise safety culture construction is enhanced, and the cultivation of the practical innovation ability of the students is improved.

The application discloses a distributed semantic trajectory similarity connection method, which comprises the following steps: establishing a global index for positioning semantic similar trajectories in two data sets from the text dimension, the time dimension and the space dimension; selecting the pruning boundary of text similarity, time similarity and space similarity according to a given similarity threshold and the similarity weight value of each dimension; pruning the global index process, and batch-pruning trajectory pairs which lack common text items, have a time distance lower bound greater than the time boundary and have a space distance greater than the space boundary; based on the trajectory summary, re-pruning the trajectory pairs in the local index space node after batch-pruning; reconstructing all trajectories, calculating the real similarity between the trajectories and obtaining trajectory pairs satisfying the similarity threshold constraint for the candidate trajectory pairs after re-pruning; and the extensive experimental research on the real world semantic trajectory set shows that the method is obviously superior to the baseline in the efficiency and scalability.