81 results about "Water model" patented technology

The present invention relates to water events modeling including flood, the number one natural disaster in the world. Specifically, the present invention generates models of water events consist of one or multiple outputs from various modeling processes. It also generates analytics of water events, and integrating the water models for machine and human-eyes consumption. Further, the present invention produces derivatives, tools, and informational services for various purposes, such as, flood risk assessment; flood determination; and insurance rating. The present invention is the process and systems of producing one or multiple models of water events and derivatives, based on various inputs. For modeling water events at a given location and in a timely fashion, the present invention prepares, aggregates, integrates, and maintains all relevant inputs in one system. The input data include various information, such as, water events' extent, flooded areas, flood plain, inundated areas, and measurement of water condition. The input datasets also include various other data, such as, terrain elevation data, land use land cover data, soil conductivity, water gauge measurements, and hydrologic regression equations for calculating flows. The inputs further include hydrologic modeling algorithms, hydraulic modeling algorithms, geospatial algorithms, and local or remote data of real-time water conditions acquired through machine services.

The invention discloses an urban water-logging analysis method and an urban water-logging analysis system in order to solve the problem in the existing water-logging analysis method that inaccurate results are caused as there is no accurate data of underground drainage facilities and a lot of variables in the model are simulated data. The method comprises the following steps: generating an urban space model containing all depressions according to urban space information; getting the water depth of each depression according to the acquired predicted total rainfall within a period of time T, the area of the depression and the underground pipeline information; judging whether the water depth is greater than a set threshold; and generating alarm information characterizing depression water-logging if the water depth is greater than the set threshold. According to the technical scheme, a rainfall model, a confluence model and an improved drainage model form a water model, the generalization problem of urban drainage system facilities in the traditional rainstorm water-logging mathematical model is solved, and the accuracy of water depth prediction is improved.

The invention provides an object-oriented hydrodynamic modeling element management method. The method comprises the steps of obtaining multi-class basic data of hydrodynamic modeling, and building an object-oriented model element of flood analysis modeling according to the multi-class basic data, wherein the object-oriented model element comprises a one-dimensional river network model element, a two-dimensional shallow water model element and a city pipe network model element, the one-dimensional river network model element comprises one-dimensional river network data and a hydrology sequence, the two-dimensional shallow water model element comprises two-dimensional grid data and a time sequence, and the city pipe network model element comprises a subsidiary catchment area, a pipe section, a node, a hydrology station network, a curve set, a time mode and LID control; providing creating, deleting, drawing and importing functions for each model element. According to the object-oriented hydrodynamic modeling element management method, by obtaining basic data related to flood, a one-dimensional city pipe network, a two-dimensional city pipe network, a one-two dimension-coupled city pipe network and a pipe network two-dimensional model element are built, so that a flood analysis model which is suitable for country pipe networks and city pipe networks is conveniently put up, and the flood analysis model is suitable for subsequent flood analysis of different areas.

Method for removing air wave noise from shallow water controlled source electromagnetic survey data, using only the measured data and conductivity values for sea water (140) and air. The method is a calculation performed numerically on CSEM data and resulting in an estimate of those data that would have been acquired had the water layer extended infinitely upward from the seafloor. No properties of the sub-sea sediments are used. Synthetic electromagnetic field data are generated for (a) an all water model (141) and (b) an air-water model (146-147) of the survey region. These simulated results are then used to calculate (148-150) electromagnetic field values corresponding to a water-sediment model with water replacing the air half space, which represent measured data adjusted to remove air wave noise.

The invention relates to an optimization technology of a circulating water conveying system, which carries out detection, analysis and technical optimization to the prior circulating water conveying system, and comprises three steps: 1. data collection of the circulating water conveying system: the data collection of the technical indicators of each part in the circulating water conveying system is carried out by a tool; 2. an analysis technology of the circulating water conveying system comprises a basis and means, and an analysis content, the basis and the means are used for establishing a model of the circulating water conveying system or a local solid water model, the analysis content is to judge whether the water conveying system has local circulation or high and low pressure mixing, and to carry out the analysis and the calculation to the unnecessary water loss; 3. the optimization technology of the circulating water conveying system is to carry out optimization to a pump station, a pipeline, a cooling tower, a water pool, a valve and back pressure in the circulating water conveying system. The optimization technology of the invention, by the data collection of each device or line in the water conveying system and carrying out the comparison and the analysis, can find out the unreasonable devices or lines to propose an improved technical proposal and provide a new object to replace the original devices or the lines, thus reducing the energy consumption.

The invention provides a one-dimensional river network generalization and high-performance one-two-dimensional coupled flood analysis method, comprising the steps of establishing a one-dimensional river network model, a confluence type unit model, a whole basin river network coupling model and a two-dimensional shallow water model. Zero-dimensional storage and nodal equations are computed, and control condition model elements are selected. The control effects of weir, sluice and pump on flow are analyzed by using control condition model elements. When the two-dimensional shallow water model isnumerically discretized, the position of variables in the computational grid is determined, and the flux, bottom slope source and friction drag source in the two-dimensional shallow water model are calculated. A spatial second-order accuracy scheme is constructed and a variety of boundary conditions are set. According to the data, a set of flood control control system is formed, and the numericalsimulation of the operation mode of engineering control is carried out to achieve the effective simulation and forecast of flood.

The invention relates to a robust adaptive autopilot control algorithm for a navigation simulator. Aiming at various ship models in navigation simulator training, a nonlinear mathematic model for ship motion is obtained based on half theoretical calculation and half experimental result, and the nonlinear mathematic model considers the interferences of wind, wave, current, and the like and relates to a low-speed shallow-water model. The designed autopilot algorithm is based on a closed-loop gain shaping simple robust control algorithm and is a new ship autopilot robust adaptive control algorithm having robustness and adaptability by combining a neurotic network direct controlling training method. The robust adaptive autopilot control algorithm has adaptability by considering the robustness of a ship motion control algorithm as well as the complexity of ship navigation and solves the problem that the prior algorithm has either robustness or adaptability and can not have both.

Taught herein is a virtual toy fighting device integrating a positioning receiver comprising a host toy device 2, a host remote-control operation device 6 and a opponent toy device 22, wherein the host toy device 2 and the opponent toy device 22 comprise a positioning receiver 3 and a positioning receiver 33 for receiving positioning information, respectively. The invention is applicable for fighting a combat game between air-to-air, air-to-land, air-to-water, land-to-land, water-to-surface, and land-to-water models, in a single user, or multiple user environment (one-to-one, one-to-many and many-to-many), and thereby widens the entertainment range of the game. This invention has wide applications in the areas of toy tools, simulators, training models, and so on.

The invention discloses a magnetic resonance system and a method for detecting the performance of a radio frequency coil thereof. The magnetic resonance system comprises at least one receiving link. Each receiving link is connected with a coil and a low noise amplifier in series, bi-directional couplers are connected between the coils and the low noise amplifiers in series, and testing signals are connected into the bi-directional couplers through diverter switches. According to the magnetic resonance system and the method for detecting the performance of the radio frequency coil thereof, the bi-directional couplers and the diverter switches are arranged so that the scattering parameter of the coil can be measured, the resonant frequency and the quality factor Q value of the coil can be calculated, coil faults can be judged rapidly and conveniently, imaging operation like water model placement is needless, the method is simple and practicable, and results are reliable.

The invention discloses a method for obtaining drain basin unit lines by utilizing complete two-dimensional shallow water equation sets. According to the method, a hydrological problem is solved by utilizing a hydrodynamic way. The method comprises the following steps of: firstly discretizing a two-dimensional shallow water equation set to establish a high-resolution two-dimensional shallow watermathematic model, so as to ensure that the two-dimensional shallow water model is capable of correctly simulating slope runoff processes; carrying out elevation assignment and roughness factor assignment by adoption of a triangular unstructured grid division calculation area; in order to avoid the problem of non-conservative drainage basin outlet water yield caused by drainage basin depression impounding, setting continuous time interval net rainfall processes as model input conditions; setting a drainage basin outlet as a free falling outflow condition; carrying out two-dimensional shallow water mathematic model calculation after setting a drainage basin initial state; after the calculation is ended, enabling a flow process at the drainage basin outlet as an S curve of the drainage basin;and obtaining a time interval unit line of the drainage basin by utilizing a conversion formula. The method is capable of covering the shortages of existing hydrological methods, and providing a newway for flood confluence analysis and calculation of regions without hydrological data.

The invention discloses a movable sand-adding and wave-making muddy water model test device with an automatic sand-removing function and a method. The movable sand-adding and wave-making muddy water model test device comprises a test water tank system, a wave-making system, a sand-adding and sand-removing system, a monitoring system and a control system. The wave-making system adopts the arrangement that a movable type wave-making machine is combined with a fixed type wave-making machine, and a vertical type energy dissipation box is combined with a slope type energy dissipation net, and simulation of a three-way regular wave and a multiway irregular wave can be achieved; the sand-adding and sand-removing system can achieve sand adding in a multi-section and movable mode, and can achieve the automatic sand-removing function; and the monitoring system and the control system can achieve closed-loop control of the device, so that the device achieves a simulation test where sand adding is synchronously matched with the waves according to a given sand-adding spatial and temporal process curve. According to the movable sand-adding and wave-making muddy water model test device with the automatic sand-removing function and the method, multi-direction and multi-waveform waves can be generated, further the stability of test sand-adding can be guaranteed, the functions of automatic, movable type and multi-direction wave-making and sand-adding are achieved, test water-sediment can be circularly utilized, the automatic sand-removing function is achieved, and the test cost is effectively reduced.

The invention discloses a method for establishing an irradiation source model based on irradiation beam characteristics of medical linear accelerators. The method is characterized in that the dosage of the medical linear accelerator to be modeled in a standard water model is measured to obtain dosage measurement data in a typical rule view first; a Monte Carlo model of the known medical linear accelerator is established based on parameters of the known medical linear accelerator; a photon energy spectrum of the medical linear accelerator to be modeled, a contamination electron spectrum of the known medical linear accelerator and the synthesis proportion of a photon source and a contamination electron source of the medical linear accelerator to be modeled are obtained respectively, the outgoing particle angle distribution law of the medical linear accelerator to be modeled is obtained, and then the irradiation source model of the medical linear accelerator to be modeled is formed. The irradiation source model is established on the basis of the irradiation beam characteristics of the known medical linear accelerator and the measurement data of the medical linear accelerator to be modeled, so that dependency on the internal structure of the medical linear accelerator to be modeled is avoided.

The invention discloses a method for two-dimensional geometric correction of a magnetic resonance image. The method includes: forming a water model, and recording number and position information of mesh points of the water model to serve as number and position information of initial control points; collecting multiple water model images in different areas of the magnetic resonance image by the aid of the water model, and extracting the number and the position information of control points in each water model picture; enabling the controls points of the water model images to correspond to the mesh points of the water model; combining the multiple water model images according to the different areas of the magnetic resonance image, computing deformation quantity between the position information of the mesh points and the position information of the control points, and estimating a deformation field according to the deformation quantity; and correcting the magnetic resonance image according to the deformation field. The method has the advantages that a small-sized water model can be used for parameter-free correction of large-sized imaging areas, and a calibration process of magnetic resonance image correction is improved.

The application provides a magnetic resonance imaging system radio-frequency calibration method and a magnetic resonance imaging system radio-frequency calibration device. The method comprises the following steps: carrying out iterative scanning in a first search scope with preset basic amplitude as an initial amplitude value of a radio-frequency pulse applied, and collecting a first echo amplitude signal of a specified spin echo in a first correction scope; judging whether there is a minimal value in the first echo amplitude signal; and when there is a minimal value in the first echo amplitude signal, acquiring a radio-frequency amplitude value corresponding to the minimal value, and taking the radio-frequency amplitude value as a first pulse calibration value for correcting a 90-degree flip angle. According to the application, the currently known basic radio-frequency amplitude obtained from a water model is taken as an initial value, there is no need for iterative search within the full scope of 0-180 degrees, the scope of iteration and calibration time are reduced, and the efficiency of calibration is improved.

The invention relates to a method for acquiring spherical harmonic coefficient of gradient field of magnetic resonance imaging system, which comprises the following steps of : (a) constructing a water model coordinate system selecting a mark point Pc(u0, v0) closest to the image center as the original point Op, selecting the u axis direction of an MRI image as the c axis direction, selecting the v axis direction in the image as the r axis direction, and selecting the direction forming a right-handed coordinate system with the c and the r axes as the s axis direction; (b) calculating the MRI coordinates of the mark point Pi according to the water model coordinate system by following steps: (1) ignoring the rotation of the water model in the plane thereof and the translation of the original point; (2) considering the rotation by a theta angle in the plane of the water model around the center of Op and a shaft in the direction of a scan layer slice; and (3) considering the translation of the coordination original point of the water model; and (c) obtaining a linear equation group concerning spherical harmonic coefficients a and b if the magnetic field intensity parameters gamma, theta, phi and image coordinates of a certain point are known, and calculating the coefficients a and b by solving the linear equation group.

The invention discloses a multifunctional continuous casting water model test device which comprises a bracket and a water tank arranged on the bracket, wherein the water tank consists of a water tank A, a water tank B and a water tank C; the water tank A, the water tank B and the water C are communicated with each other through a tee joint; the tee joint is provided with a control valve of the water tanks A and C and a control valve of the water tanks B and C; the water tank C is communicated with a simulation container arranged at a lower end through a bottom water outlet; the bottom of the simulation container is provided with a water outlet which is connected with a collecting pipe through a pipeline; the collecting pipe is connected with a water pump; the water pump is connected with the water tank A and the water tank B through a water inlet pipe respectively; and the water pipe is provided with a water inlet control valve of the water tank A and a water inlet control valve of the water tank B respectively. The test device has the advantages that: the requirement of simulation research on a molten steel flow field in a ladle is met, the simulation research of a molten steel flow field in a pouring box and the simulation research of a molten steel flow field in a crystallizer can be realized, simulation researches are particularly performed on the ladle replacing process of the ladles during continuous casting and the molten steel difference among different ladles, and multiple functions of a water tank system are realized.

Method for removing air wave noise from shallow water controlled source electromagnetic survey data, using only the measured data and conductivity values for sea water (140) and air. The method is a calculation performed numerically on CSEM data and resulting in an estimate of those data that would have been acquired had the water layer extended infinitely upward from the seafloor. No properties of the sub-sea sediments are used. Synthetic electromagnetic field data are generated for (a) an all water model (141) and (b) an air-water model (146-147) of the survey region. These simulated results are then used to calculate (148-150) electromagnetic field values corresponding to a water-sediment model with water replacing the air half space, which represent measured data adjusted to remove air wave noise.

The invention discloses a method for measuring the grounding resistance of a grounding grid, which belongs to a method for measuring the grounding resistance of a grounding grid in a power plant and a substation. Geological survey soil resistivity or water conductivity to prepare model conductive medium; according to the electric field geometric simulation theory of Laplace equation, the length of the grounding grid can be enlarged in equal proportions at the beginning of the design of the repower plant or distribution station project Or shrink, provide improvement measures for the design of the grounding grid, predict the grounding resistance after the grounding grid is installed, and optimize the design when the performance of the grounding resistance is met, further reduce the project cost risk, and the measurement cost is disclosed, which realizes The technology of measuring the grounding resistance of the grounding network is economical, and the invention can be directly applied to various electric places, and has a wide range of applications.

The invention is suitable for a special effect technology of consumption type electronic products and provides a method and device for generating a water wave special effect and electronic equipment. The method comprises the following steps of: acquiring a set water wave parameter and establishing a grid model according to the acquired water wave parameter, wherein the water wave parameter comprises the width and height of a water wave image, the amplitude of a water wave, the frequency of the water wave and the phase of the water wave; reading image data and storing the image data in the grid model; converting a two-dimensional grid model into a three-dimensional water wave model according to the two-dimensional coordinate of each grid point in the grid model and the water wave parameter; and projecting the water model model on a screen for displaying. In the embodiment of the invention, the generated water wave is obtained by converting a three-dimensional water wave, so that the obtained water wave has a three-dimensional effect and is closer to a real water wave, and better vision experience is achieved.

The invention relates to a preparing method for steel smelting system water model casting powder for experimental use. The technical scheme comprises the steps of firstly, adding foam particles into the steel smelting system water model; then, adding high-viscosity mixed oil by a water port; afterwards, adding low-viscosity mixed oil by the water port to obtain the water model casting powder for experimental use composed of a foam particle layer, a high-viscosity mixed oil layer and a low-viscosity mixed oil layer successively from top to bottom, so as to simulate the corresponding powder dregs layer, sintering layer and liquid dregs layer in the casting powder of the steel smelting system. The high-viscosity mixed oil is mixed oil composed of plant oil and melted abandoned animal oil, and the low-viscosity mixed oil is a mixed oil composed of plant oil and kerosene. Besides the preparing method for steel smelting system water model casting powder for experimental use is low in cost and simple in technology, the prepared steel smelting system water model casting powder for experimental use has the characteristics of variable viscosity and variable density, better accords with the structure characteristics of the casting powder in the real steel smelting process, and simulates casting powder motion and slag entrapment in the steel smelting system more veritably and vividly.

The invention discloses a combined water and fire scheduling method of considering optimal abandoned water of cascade hydropower stations. The method comprises the steps of: 1) collecting all output parameters of the hydropower stations and thermal power stations, and uploading the same to a scheduling center, wherein the parameters include climbing rates of the thermal power stations, output of the hydropower stations and the thermal power stations, storage outflow of the hydropower stations, water levels, water storage capacity, abandoned-water flow and the like; 2) fitting function relationships among upstream water levels, the water storage capacity, downstream water levels, the storage outflow and the like by the scheduling center; 3) establishing an optimal-abandoned-water model of the cascade hydropower stations and a power generating cost minimization model of combined water and fire scheduling; and 4) calculating optimal output parameters of the hydropower stations and the thermal power stations, formulating an optimal scheduling plan, and issuing scheduling instructions to adjust the output parameters of the hydropower stations and the thermal power stations. According tothe method of the invention, a water resource allocation strategy of combining the optimal abandoned water and forced abandoned water is adopted, the abandoned-water characteristics of the cascade hydropower stations are utilized, water resource utilization maximization is realized, thermal power generation costs are reduced, complementary running of hydropower and thermal power is realized, andeconomy of system running and a utilization rate of water resources are improved.

The invention relates to an aboveground vegetation ecological water estimation method based on airborne LiDAR and Sentinel-2A data, solves the hydrological effect problem of vegetation from a macroscopic level, undoubtedly is beneficial exploration and attempt, and comprises the following steps: step S10, selecting a research area, and collecting field sample plot survey data; s20, 18 characteristic indexes are extracted from Sentinel-2A remote sensing data, and a vegetation canopy ecological water model is constructed; s30, according to the field survey data, a nonlinear model is adopted to construct a coniferous tree and broad-leaved tree breast height-tree height conversion model; step S40, acquiring single-tree vertical structure information through airborne LiDAR data; s50, constructing an airborne LiDAR vegetation stem and branch ecological water inversion model; and step S60, combining the Sentinel-2A vegetation canopy ecological water with airborne LiDAR vegetation stem and branch ecological water to obtain an above-ground vegetation ecological water reserve result. Compared with a single passive remote sensing source, the above-ground vegetation ecological water reserve result has the advantage that the accuracy of the above-ground vegetation canopy, stem and branch ecological water estimation technology is greatly improved.

A filter for separating particles from cooling water in a nuclear plant of light water model. The filter has an inlet end (2) and an outlet end (3) and allow flowing through of the cooling water in a flow direction % from the inlet end to the outlet end. The filter comprises a plurality of channels (5) extending mainly in the flow from the inlet end to the outlet end. Each of the channels comprise a first (6) channel section provided closer to the inlet end, a second (8) channel section arranged closer to the outlet end, and an intermediate section (7) provided between the first and the second channel section. The intermediate section (7) has an extension d2 in a direction x transversely to the flow direction, which is essentially larger than the extension d2.

The invention discloses a design method of a molten iron KR desulfurization stirrer, which comprises the following steps: firstly, calculating the molten iron depth of a molten iron tank according tothe average diameter D and the rated maximum molten iron loading capacity of the molten iron tank; calculating to obtain the impeller diameter and the blade effective height b of the new stirrer, andthen calculating the structural parameters of the new stirrer; according to the maximum allowable rotating speed of the stirrer to be offline and the stirring rotating speed of the new stirrer, determining the stirring rotating speed regulation and control range of the stirring device; checking and correcting the maximum loading capacity of the fixed molten iron tank; calculating theoretical stirring power and model selection determination of the new stirrer according to related parameters of the new stirrer; and carrying out empirical correction on the structural size of the new stirrer. According to the invention, through water model tests of stirrers with different blade structures and blade numbers and statistical analysis of industrial application data, an empirical correction methodof the blade number and the blade structures is determined, and optimal stirring, mixing and dispersing effects and KR desulfurization reaction dynamic conditions of stirrers with different structuresare ensured.

The invention belongs to the technical field of steel manufacturing, and particularly relates to a component change prediction method and system for a special steel type mixed casting blank, and particularly relates to a component change prediction method for a special steel type mixed casting blank. The method comprises the following steps of: collecting a mixed casting blank sample, and analyzing the component change of the mixed casting blank sample; acquiring the tundish residual steel quantity and the tundish steel production capacity, and fitting a mixing degree function model according to the component change, the tundish residual steel quantity and the tundish steel production capacity; acquiring the continuous casting pulling speed and the width of the mixed casting blank sample, and fitting a liquid core impact depth function model according to the component change, the continuous casting pulling speed and the width; and according to the mixing degree function model and the liquid core impact depth function model, predicting the initial position and the final position of the mixed casting blank, wherein the mixing degree function model and the liquid core impact depth function model are established without depending on laboratory digital analog calculation or water model experiments, so that the prediction accuracy is high.

The invention belongs to the technical field of waterlogging models, and particularly relates to an waterlogging model prediction method based on a firefly algorithm, and the method comprises the steps: 1, training a weight and a threshold of a neural network through employing a training error of the neural network as a fitness function of a firefly individual, and obtaining an optimal parameter;2, constructing a waterlogging prediction model by using the optimal parameters obtained in the step 1; according to the firefly algorithm-based waterlogging prediction model provided by the invention, training the weight and the threshold of the neural network by adopting the firefly swarm algorithm, and performing waterlogging prediction by adopting the trained neural network model. According tothe method, the defects that a traditional rainfall ponding model needs a large amount of basic data information, requires elaborate hydrological and physical processes and the like are overcome, meanwhile, the defect that a neural network is prone to falling into local minimum is overcome, and the method has important significance in accurate prediction of urban inland inundation and acceleration of the process of a smart city.

The invention relates to a vortex prevention device for relieving a fluid vortex, and provides a device which can prevent fluid from producing vortex and the vortex from being expanded, which can be applied to various fields and applied to a position close to a ladle or tundish casting nozzle in the metallurgical industry. The device is characterized in that: one or more table bodies which are made of a corrosion-resistant refractory material are placed close to the ladle or tundish casting nozzle; and the section of each table body can have a rectangular shape or other polygonal shapes. The theoretical basis of the device is that: due to geocentric deflecting force produced by earth rotation and gravitational attraction, a funnel-shaped vortex is formed close to the nozzle at the final stage of casting of molten steel. Different placement schemes are available for different geographic positions. The scheme is that: a flow field which is completely reverse to that produced by the vortex is forcibly arranged at the bottom of a container, so the formation of the vortex is suppressed. Through water model experiments, obvious effect is achieved, and particularly the run-through height is halved. The device substantially suppresses the expansion of the vortex, so the purity of the molten steel and the metal yield can be simultaneously improved. The device provides powerful guarantee for subsequent tundish metallurgy and continuous casting production.

The invention discloses a polyamide thermal barrier strip preparation technology, which mainly comprises the steps: formulation of raw materials, formation of alloy particles, drying, extrusion, pressurized flow distribution of a flow distribution plate and water model cooling formation; namely, the formulated raw materials are mixed and refined to alloy particles in a double screw extruder while even mixing is guaranteed, the alloy particles are dried in vacuum by using a drier, the alloy particles dried in the previous step are extruded to the flow distribution plate by using an extruder, a pressurization device is utilized to pressurize melts in an inner cavity of the flow distribution plate to achieve distribution, thereby ensuring adequate pressure inside the melts, a plurality of melts enter a water model cooling device under the action of the pressure of the extruder, and the water model cooling device instantaneously cools a plurality of melts from about 300 DEG C to 60 to 80 DEG C in order to achieve instant formation of the polyamide thermal barrier strip. The preparation technology with simple process can achieve instant and fast formation of a plurality of laminated polyamide thermal barriers, which dramatically enhances production efficiency and simultaneously ensures the quality of formed objects.

The invention discloses an underground water model output uncertainty analysis method in combination of a frequency analysis method and a sensitivity analysis method. The frequency analysis process comprises a parameter estimating process and a supposed checking process, wherein a typical distribution function in 7 is selected as an alternative probability density function, the supposed checking is carried out, and a proper probability density function is selected for the underground water level sequence. The sensitivity analysis method comprises stepwise regression analysis and mutual entropy analysis; the stepwise regression analysis can be used for analyzing the trend of the uncertain importance of an input variable, and the mutual entropy analysis can be used for well identifying the uncertainty factor. The method can be used for making up the deficiency in research content of the traditional uncertainty analysis method, analyzing the probability distribution characteristic and identifying the key uncertainty factor influencing the variable probability distribution, thus the production and source of the underground water model uncertainty can be well understood, feedback is provided for the data acquiring work of the underground water model, and the uncertainty of the model is reduced.

The invention relates to a calculating method for determining the gas content of gas-liquid two-phase flow in a ladle. The method includes the steps of determining a two-dimensional geological model of a water model according to actual technological parameters of the ladle, determining the gas injection flow Qm in the water model, establishing a gas-liquid two-phase flow model and a gas-liquid interaction force model, and obtaining a distribution map of the gas content in the water model and a gas-liquid phase flow field. By means of the method, the gas content and overflow speed of gas in anoutlet of the ladle can be calculated, the liquid-phase injection amount caused by gas overflow is analyzed, the influences of the gas flow of an injection gun and the insertion depth of the injectiongun on the gas content, the overflow speed and the injection amount can be detected by changing the gas flow of the injection gun and the insertion depth of the injection gun, all the technological parameters are accurately adjusted in real time, and the accident occurrence rate is reduced.