9 results about "Transportation models" patented technology

A large-model question answering method and apparatus for the transportation industry, and a device and a storage medium, relating to the interdisciplinary field of artificial intelligence and information security. The method comprises: on the basis of a pre-constructed security knowledge base, retrieving a transportation-related question to be processed; when the obtained retrieval result indicates that there is no reply information corresponding to the transportation-related question in the knowledge base, determining, on the basis of a preset question security interception strategy, whether to currently trigger a question interception operation; when an obtained first determination result indicates that the question interception operation is not to be triggered, performing, on the basis of a preset prompt, question enhancement on the transportation-related question; on the basis of a pre-fine-tuned target large transportation model, processing the obtained enhanced question to obtain target reply information; and on the basis of a preset answer security interception strategy, determining whether to currently trigger a reply interception operation corresponding to the target reply information, so as to complete a question answering operation on the basis of an obtained second determination result. The security and accuracy of question answering can be effectively improved.

The invention discloses an atmospheric pollution source area tracing method based on a track channel conveying model, and relates to the technical field of atmospheric environment monitoring and pollution tracing. The air pollution source area tracing method comprises the following steps: acquiring backward air mass trajectory data of a target receiving point; aiming at source region grid points passed by the track, calculating the average contribution concentration of each source region grid point to a target receiving point; based on the average contribution concentration data of the multiple tracks, the source region weight concentration of each source region grid point is calculated, and the source region weight concentration is obtained by introducing a transmission attenuation factor to carry out weighted normalization on the source region concentration; and comparing the source area weight concentration with a pollution threshold value in an ambient air quality standard, generating a pollution characteristic index, and identifying the source area grid point with the pollution characteristic index greater than 1 as a high-pollution potential source area. A physical conduction link between a source area and a receiving point is constructed, the pollutant concentration change in the gas mass conveying process is truly reduced, and accurate positioning of a potential pollution source area is achieved.

This invention belongs to the field of transportation technology and is a collaborative planning method for charging and swapping facilities for electric heavy-duty trucks in port collection and distribution scenarios. The method includes: establishing a deployment plan for charging and swapping facilities under the constraint of the system's total budget; establishing a transportation model and an energy consumption model based on container status and flow direction; establishing a macroscopic distribution model of charging demand to characterize the generation of potential charging demand and its spatial allocation among facilities; establishing a queuing time model and setting constraints based on fleet size; establishing an optimization model with the goal of maximizing the system's total profit; relaxing the optimization model and directly controlling the allocation of charging demand at each node through operational scheduling; decomposing the relaxed optimization model into independent node subproblems using Lagrange decomposition; and updating the Lagrange multipliers using a subgradient algorithm, iteratively coordinating each subproblem to converge to the optimal solution. This invention solves the problem of collaborative planning for charging and swapping facilities for electric container truck fleets in port collection and distribution scenarios.

This invention relates to an optimal scheduling method and system for an electro-hydrogen coupling system based on truck flexibility and relaxation-repair warm-start technology. The method includes: acquiring basic data of the electro-hydrogen coupling system; constructing a power system model, a hydrogen energy system model, a pipeline congestion management model, and a hydrogen truck transportation model, wherein the pipeline congestion management model is a truck-based pipeline congestion management model that treats hydrogen trucks as flexible resources; establishing constraints and constructing an optimal scheduling model with the goal of minimizing the total system operating cost over the entire scheduling cycle; transforming the optimal scheduling model into a convex programming model using a mixed-integer second-order cone programming reconstruction technique; and solving the convex programming model using a relaxation-repair warm-start algorithm, considering the physical state information of the system, to obtain the optimal scheduling result. Compared with existing technologies, this invention has the advantages of actively alleviating pipeline physical congestion and high computational efficiency.

The invention provides a deep vertical shaft double-air-duct press-in type air supply air duct position optimization method which comprises the following steps: (1) collecting parameters of a vertical shaft and air ducts, and calculating the blasting smoke throwing distance and the generated CO initial concentration according to the amount of explosive needed by blasting; (2) constructing a physical model matched with actual engineering parameters by adopting numerical simulation software based on the component transportation model, and setting different relative arrangement positions of double air ducts; (3) analyzing the derived simulation data at different moments and the related visual cloud atlas, counting the CO concentration condition in the working area, and fitting a curve of the CO concentration changing along with time; and (4) by taking the CO safe concentration threshold value as a reference, analyzing the ventilation time required by the standard reaching of the CO concentration of the operation area under each arrangement working condition, sorting and drawing a chart. According to the method, the ventilation efficiency change characteristics under different air duct arrangement angles can be effectively determined, and scientific reference is provided for optimal air duct arrangement scheme selection of various deep vertical shaft engineering double-air-duct press-in type air supply systems.

The invention belongs to the technical field of transportation, and relates to a collaborative planning method for a charging facility of an electric heavy truck for port gathering and distributing transportation, which comprises the following steps of: establishing energy complementing facility deployment under a system total budget constraint condition; establishing a transportation model and an energy consumption model according to the state and the flow direction of the container; establishing a macroscopic distribution model of energy supplement demands, and depicting generation of potential energy supplement demands and space distribution among facilities; establishing a queuing time model, and establishing constraint conditions according to the motorcade scale; establishing an optimization model by taking maximization of the total profit of the system as an optimization target; performing model relaxation on the optimization model, and directly controlling energy supplement demand distribution of each node through operation scheduling; decomposing the relaxed optimization model into independent node sub-problems by utilizing Lagrange decomposition; and updating the Lagrange multiplier by using a subgradient algorithm, and coordinating each sub-problem through iteration to converge to an optimal solution. According to the method, the problem of collaborative planning of the charging facilities of the electric container truck fleet in the port collection and distribution scene is solved.

The application provides a digital garment factory three-dimensional model building method and device, which comprises the following steps: based on the quantity of workstations required, a sewing workstation model is instantiated on a three-dimensional scene floor grid to obtain a sewing unit; based on the maximum rotating diameter and the maximum physical swing radius of the finished garment after hanging, a sweep radius is determined; based on the peripheral boundary of the sewing unit, a safety isolation ring line is generated outward with the sweep radius as the offset distance; a three-dimensional shelf model library is called in the area outside the safety isolation ring line, and a hanging shelf array is generated based on the finished garment storage capacity requirement; an AGV transportation model is instantiated based on the track data of the safety isolation ring line, collision analysis is performed based on the AGV transportation model and the safety isolation ring line, and an AGV navigation path is obtained; and based on the spatial position relationship of the AGV navigation path, the sewing unit and the multi-layer hanging shelf array, rendering is performed to generate a digital garment factory three-dimensional panoramic model. The application eliminates the safety hazards of mixed human-machine operation.

The application relates to a water quality regulation method, device and equipment for a water supply network terminal, which can accurately capture high-frequency water quality dynamics at the terminal of the network by coupling a high-resolution random user water demand model and a multi-component water quality reaction and transportation model considering longitudinal diffusion, and provides a reliable basis for accurate regulation; the multi-component water quality reaction and transportation model is used to screen a candidate scheme set, and a scheme with the lowest water resource consumption and the lowest economic cost is further screened by taking the minimization of total drainage volume as an optimization target, thereby showing great water saving potential and economic benefits and overcoming the defects of resource waste or poor flushing effect of a traditional flushing strategy; for the terminal of the network, which is a high-risk and difficult-to-manage key area, a targeted, dynamic optimization and fine management technical means is provided, and a change from traditional passive response and lag processing to prospective and active risk management based on model prediction is realized.

The invention relates to the technical field of pipeline gas explosion venting, in particular to a simulation method for venting of a square pipeline with a lateral guide pipe. The method comprises the following steps: S1, establishing a pipeline model comprising a main pipeline and a plurality of lateral conduits, and establishing an external environment area in a preset range outside the pipeline model; s2, performing grid division on the pipeline model; s3, importing a grid file, and setting a basic model; s4, setting a component transportation model, boundary conditions, a pressure and speed coupling method, a discrete method and overpressure and temperature monitoring; s5, an ignition area is established, and design is initialized; and S6, iterative calculation is carried out, post-processing is carried out on a calculation result, explosion overpressure and flame wave characteristics are obtained, and a flow field flow trace is displayed. The method solves the problem that discharge safety is not considered in existing pipeline explosion venting, and a theoretical basis is provided for engineering protection measures.