12results about How to "Great engineering application value" patented technology

This invention relates to the fields of audio and video playback technology and network communication technology, specifically a dynamic control method and system for video playback caching. By introducing intelligent prediction models, dynamic weight allocation algorithms, and scene association mechanisms, it achieves precise adjustment of video player caching duration, download speed, and external parameters, thereby maximizing the utilization of the player's local cached content, improving bandwidth utilization, reducing CDN bandwidth costs, and minimizing playback stuttering. Furthermore, this invention provides dynamic parameter and intelligent algorithm configuration interfaces for external users, allowing them to adjust caching control strategies based on multiple different parameters and business scenarios to achieve the optimal caching strategy for their own business.

The present application relates to a kind of spot I type nugget fracture failure constitutive model construction method, belong to the fracture mechanics and numerical simulation method technical field of spot welding joint.The technical scheme of the present application is: the parameter construction of constitutive model is carried out, parameter is directly used for spot welding joint related finite element simulation;Spot welding joint is bonded with uniaxial tensile fixture, and the tensile experiment of nugget fracture form is completed under tensile testing machine and the load-displacement curve and maximum load are recorded;Finite element model is constructed and tensile displacement is calculated;Convert and correct stress-displacement curve in combination with measured nugget area, solve maximum tensile stress and fracture energy, parameter is substituted into model and the precision of replacement connection mode is verified.The beneficial effects of the present application are: the accurate construction of spot I type nugget fracture failure constitutive model is realized, which provides standardized mechanical parameter support for spot welding joint structure reliability design and welding process optimization, and significantly improves the accuracy and engineering application value of finite element simulation.

This invention provides a method for predicting the dominant frequency of blasting vibration by integrating parameter fluctuation processing and the Dream Optimization Algorithm (DOA), belonging to the field of underground engineering safety control technology. The system includes a data acquisition and uncertainty modeling module, a data preprocessing and feature construction module, a hyperparameter optimization module, and a prediction model training and result output module. The method obtains relevant parameters through on-site investigation and monitoring, and generates an extended sample set using a combination of probabilistic perturbation modeling and fuzzy triangular modeling. The data is preprocessed and features are selected. The DOA algorithm is used to globally search the hyperparameters of the Support Vector Regression (SVR) model, and the optimal hyperparameter combination is selected by combining a robustness fitness function. The SVR model is trained, and prediction results and uncertainty prediction intervals are generated. This invention can explicitly characterize the uncertainty of geological parameters, achieve efficient global optimization of hyperparameters, improve prediction accuracy, robustness, and generalization ability, and is applicable to different geological conditions and blasting scenarios. It can be extended to various blasting dynamic response prediction tasks.

This invention discloses a comprehensive evaluation platform for railway line schemes based on a large model, relating to the field of railway line planning technology. The invention includes a survey and design data collaboration module, a dual-model evaluation core module, a model output optimization module, and a database. The survey and design data collaboration module collects relevant data from various survey areas and constructs an evaluation system. The dual-model evaluation core module assesses the flood control and frost prevention effects of the survey areas based on summer precipitation and winter low-temperature conditions, obtaining scores. The model output optimization module combines the comprehensive evaluation score with the flood control and frost prevention scores to generate and screen candidate railway line schemes. This invention improves the accuracy of environmental assessment, data collaboration, and the scientific nature of scheme optimization in railway line evaluation. It deeply integrates environmental assessment of survey areas with railway line scheme optimization, enhancing the scientific nature, safety, and feasibility of railway line site selection, and reducing subsequent operation and maintenance costs.

This invention relates to a phase-sensitive optical time-domain reflectometer based on orthogonal frequency division multiplexing (OFDM) pulse coding. A continuous laser beam is split into a local path and a probe path via an optical coupler. The probe path, driven by a radio frequency signal, generates multiple frequency-orthogonal intensity-coded pulse sequences through an optical intensity modulator. These sequences are arranged sequentially in time, possessing the same symbol information but different chip sequences. The Rayleigh backscattered light generated by the pulse sequences entering the sensing fiber under test undergoes coherent interference with the local light in an optical bridge and polarization diversity module. The signal acquisition circuit utilizes an unmatched filter to achieve pulse compression and Rayleigh scattering signal separation, and synthesizes the results of the pulse coding sequences at each frequency to obtain the strain signal. Compared with existing technologies, this invention achieves pulse compression by designing an unmatched filter, improving the signal-to-noise ratio while maintaining spatial resolution. Furthermore, by synthesizing the results of orthogonal frequency pulse sequences, coherent fading is eliminated, achieving fading-free, high signal-to-noise ratio strain measurement.

The application relates to the technical field of computer application, in particular to an optimization method for quickly solving a motor train unit interchange plan. The method comprises the following steps: obtaining real-time state data of a motor train unit; constructing a time-space axis network of the motor train unit interchange plan based on the real-time state data of the motor train unit; establishing an original model of the motor train unit interchange plan based on actual state data of the motor train unit and the time-space axis network; the actual state data comprises real-time state data and maintenance state data of the motor train unit; establishing an aggregated optimization model based on the real-time state data of the motor train unit and the original model of the motor train unit interchange plan, the aggregated optimization model is based on the real-time state data of the motor train unit to obtain a solving result; constructing a disaggregated solving model based on the solving result of the aggregated model, the disaggregated solving model combines the aggregated result with the obtained actual state data to generate a specific real-name interchange plan.

This invention discloses a liquefied gas storage tank and a vessel for transporting liquefied gas. The liquefied gas storage tank includes a main shielding layer that contacts the liquefied gas on one side, a secondary shielding layer disposed on the other side of the main shielding layer, and at least one liquefied gas loading / unloading tower. The base of the liquefied gas loading / unloading tower includes: a lower part of the base body fixedly connected to the bottom wall; a corrugated plate of the secondary shielding layer connected to the lower part of the base body; and a closed end at one end of at least one corrugation of the secondary shielding layer facing the lower part of the base body. An upper part of the base body has mounting holes in the main shielding layer, through which the upper part of the base body is fixedly connected to the lower part of the base body. By opening mounting holes on the flat surface of the main shielding layer to achieve the installation of the pump tower base, the integrity of the corrugated structure of the main shielding layer is fully preserved, ensuring the expansion and contraction performance of the main shielding layer in low-temperature environments and improving the low-temperature sealing reliability of the storage tank.

This invention discloses an 800kV GIS (Gas-Insulated Switchgear) dual-sealing structure with separate main and auxiliary sealing functions, and a life-cycle design method suitable for high-altitude desert environments. The structure includes a GIS equipment shell and a flange. The flange is integrally installed at the connection end of the GIS shell. The flange connection area features a main sealing structure and an auxiliary sealing structure. The main sealing structure is located closer to the GIS shell forming the air chamber, while the auxiliary sealing structure is located closer to the external environment. This invention's dual-sealing structure with separate main and auxiliary sealing functions significantly reduces the risk of SF₆ leakage in the GIS equipment, improves the reliability of the sealing structure in low-pressure environments at high altitudes, delays the aging of sealing materials, and enhances the adaptability of the GIS equipment to windy, sandy, and temperature-differential environments.

This invention provides a method and system for dynamic monitoring of anthropogenically disturbed soil and water conservation patches based on a knowledge graph. The method specifically includes: constructing a dynamic knowledge representation framework: dividing soil and water conservation knowledge into static and dynamic knowledge, and establishing semantic associations between static and dynamic knowledge; constructing an ontology: defining entity categories, defining relationship types between entities based on the dynamic knowledge representation framework, and defining entity attributes; constructing an ontology structure containing entity categories, relationship types, and attribute constraints, and generating relationship annotation templates; knowledge extraction and fusion: extracting entities and relationships from remote sensing image data based on the relationship annotation templates, and fusing the extracted knowledge; constructing entity-relationship-attribute triples to build a knowledge graph; and assessing the risk of soil erosion in dynamically disturbed soil and water conservation patches based on the constructed knowledge graph. This invention provides a scientific basis for decision-making by regulatory authorities and has broad engineering application value.

The utility model relates to the technical field of ore feeding transportation of mine ore grinding systems, in particular to a novel feeding trolley hopper clamping prevention device which comprises a feeding trolley and a hopper clamping prevention device body, the hopper clamping prevention device body is installed on the side face of the feeding trolley, and a structural steel plate is fixedly installed on the side wall of the feeding trolley. Two pieces of angle steel are fixedly installed on the structural steel plate, a correlation switch is fixedly installed on each piece of angle steel, the two correlation switches are oppositely arranged in parallel, a wear-resisting lining plate is fixedly installed on the inner wall of the feeding trolley, the hinge is welded to the structural steel plate, the movable steel plate is welded to the hinge, and the movable steel plate is welded to the wear-resisting lining plate. The hinge can rotate the movable steel plate, the displacement rod can drive the movable steel plate, the movable steel plate can prevent the correlation switch from transmitting signals, and the iron plate machine and the belt conveyor stop running after the correlation switch is blocked. The feeding trolley solves the problem that hopper clamping faults are caused when a feeding trolley goes down a mine in the prior art.

The utility model relates to the technical field of bridge detection, and particularly discloses a bridge internal narrow space detection device which comprises a machine body, a driving device, an adjustable camera device and a controller. Wherein the driving device comprises motors and driving wheels, the driving wheels are detachably connected to the two sides of the fuselage, each driving wheel is connected with the corresponding independent motor, the adjustable camera device comprises a camera, a light supplementing lamp and a holder, the camera is detachably connected to the holder, the light supplementing lamp is arranged around the camera, and the light supplementing lamp is arranged around the holder. And the holder is fixed on the front end surface of the fuselage. And the controller is arranged in the machine body and has a wireless communication function. The motor, the camera, the light supplementing lamp and the holder are all connected with a controller, and the controller is connected with a power supply device arranged in the machine body. The bridge detection device can conveniently enter a narrow space in a bridge for detection, and the power assembly can be flexibly replaced, so that the bridge detection device adapts to different detection environments.

The application discloses a partial discharge diagnosis method based on regional clustering, which firstly extracts pulse repetitive discharge spectrum data and corresponding labels in a partial discharge training set and stores the data as a mapping matrix. Through a primary clustering function, corresponding selected region coordinate matrices are obtained. The selected region coordinate matrices are classified according to the labels, and the result is stored in a clustering data dictionary. The labels and the selected region coordinate matrices in the clustering data dictionary are iterated, and are sent into a secondary clustering function to obtain final diagnosis region coordinate matrices. Whether the collected PRPD spectrum data to be diagnosed is faulty is judged in combination with a discharge frequency threshold, a corresponding fault occurrence probability is calculated, and finally a partial discharge fault diagnosis result containing the fault occurrence probability is generated.