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1454 results about "Distribution rule" patented technology

Definition of the Empirical Rule. The empirical rule states that for a normal distribution, nearly all of the data will fall within three standard deviations of the mean. The empirical rule can be broken down into three parts: 68% of data falls within the first standard deviation from the mean. 95% fall within two standard deviations.

Nature scene image classification method based on area dormant semantic characteristic

The invention discloses a method for the classification of natural scene images on the basis of regional potential semantic feature, aiming at carrying out the classification of the natural scene images by utilizing the regional potential semantic information of the images and the distribution rule of the information in space. The technical proposal comprises the following steps: firstly, a representative collection of the classification of the natural scene images is established; secondly, sampling point SIFT feature extraction is carried out to the images in the representative collection of the classification of the natural scene images to generate a general visual word list; thirdly, the regional potential semantic model of an image is produced on the representative collection of the classification of the natural scene images; fourthly, the extraction of the regional potential semantic feature of the image is carried out to any image; finally, a natural scene classification model is generate, and classification is carried out to the regional potential semantic feature of the image according to the natural scene classification model. The method inducts the regional potential semantic feature, thus not only describing the regional information of image sub-blocks, but also including the distribution information of the image sub-blocks in space; compared with other methods, the method of the invention can obtain higher accuracy, and no manual labeling is needed, thus having high degree of automation.
Owner:NAT UNIV OF DEFENSE TECH

Liquid hydrocarbon mercaptan removal technique capable of deeply removing total sulfur

The invention relates to a liquid hydrocarbon mercaptan removal technique capable of deeply removing total sulfur, in particular to a sweetening technique for liquefied gas in an oil refinery. The oil refining liquid hydrocarbon refers to components of liquefied gas and light gasoline, wherein the liquefied gas is a raw material for producing MTBE, and the light gasoline is a component for producing high-cleanness gasoline. In order to solve the problem of high total sulfur in the oil refining MTBE and the light gasoline, according to the shape and the distribution rule of sulfocompounds in the liquid hydrocarbon, processes such as functional reinforcement of a recycle solvent, three-phase mixed reinforced regeneration, regenerated catalyst and extractant separation and recycle solvent deoxidization and the like are adopted in the conventional process of liquid hydrocarbon extraction, oxidization and mercaptan removal, so the technical effects of reinforcing the mercaptan removal depth, improving carbonyl sulfide removal rate, and avoiding forming disulphide in the extracting, saving energy and reducing emission and the like are achieved. Thus, the liquid hydrocarbon can be deeply desulfurated, the problem of high total sulfur in the oil refining MTBE and the light gasoline is solved and the slag discharging quantity in the conventional process is greatly reduced.
Owner:HEBEI REFINING TECH CO LTD

Strengthening and reinforcing method of high-ground-pressure soft rock laneway by hierarchical grouting

The invention relates to a strengthening and reinforcing method of a high-ground-pressure soft rock laneway by hierarchical grouting. Aiming at the deformation damage and crack distribution rules of laneway wall rock of high-ground-pressure soft rock, a hierarchical grouting mode for a shallow layer and a deep layer is adopted to hierarchically and emphatically strengthen and reinforce the shallow layer and the deep layer by grouting. The method comprises the following steps of: firstly, carrying out shallow-hole low-pressure grouting to a laneway shallow-layer gap development zone and then carrying out deep-hole high-pressure grouting to deep rock bodies; constructing shallow-hole grouting with small grouting pressure so that grout is scarcely diffused into the deep part, and grouting passages, such as a deep gap of the deep part and the like, are well preserved without blockage; and adopting a double-component chemical grout malisan with easy dispersion and strong permeability in constructing deep-hole grouting to realize deep high-pressure grouting on the basis of a formed grout-stopping shielding shell formed by former-period shallow-hole grouting so that the distribution compactness and the dispersion evenness of the grout in the deep grouting are improved, and the strengthening effect of the deep grouting on the wall rock is effectively improved. The method is simple and easy to implement.
Owner:CHINA UNIV OF MINING & TECH

Physical simulation method and physical simulation experimental device for oil and gas charging of fracture-cave carbonate reservoir

ActiveCN105089657AChange the filling flow rateChange pressureSurveyConstructionsMonitoring systemKarst
The invention provides a physical simulation experimental device for oil and gas charging of a fracture-cave carbonate reservoir. The physical simulation experiment device comprises a fracture-cave model, an experiment table with a window, surrounding rock and a camera shooting and monitoring system, wherein the fracture-cave model comprises simulation caves in different sizes and simulation fractures in different sizes, and the simulation caves are communicated through the simulation fractures; the fracture-cave model is arranged in the experiment table with the window, and the simulation caves in at least one side of the fracture-cave model are visible through the window of the experiment table; the surrounding rock surrounds the fracture-cave model to form the fracture-cave carbonate reservoir in a simulating manner; and the camera shooting and monitoring system is used for detecting and adjusting changes of both the flow rate and pressure in the charging process and recording images, displayed in the window, of the fractures and the caves in the charging process. The invention further provides a physical simulation method for oil and gas charging of the fracture-cave carbonate reservoir, and the physical simulation method employs the experimental device. According to the physical simulation method and the physical simulation experimental device for oil and gas charging of the fracture-cave carbonate reservoir, an oil-gas-water distribution rule can be obtained according to such parameters as karst, fractures, crude oil density and oil-gas-water distribution.
Owner:PETROCHINA CO LTD

Device and method for thickened oil deposit gas injection huff-puff oil extraction physical simulation experiments

ActiveCN102748018AReliable dataReliable Research PlatformBorehole/well accessoriesControl systemModel system
The invention discloses a device and method for thickened oil deposit gas injection huff-puff oil extraction physical simulation experiments. The device comprises an injection system, a model system, an output control system and a data collection and control system, wherein the injection system is connected with the model system so as to inject formation water, crude oil and huff-puff gas into the model system, the outlet end of the model system is connected with the output control system, the output control system is used for controlling the output of oil-gas mixtures of the model system and calculating gas flow and oil production in the outputted oil-gas mixtures, the model system is further connected with the data collection and control system, and the data collection and control system is used for collecting pressure, temperature and huff-puff gas flow data in a model body and monitoring and processing data in real time. The device can be used for truly simulating processes of injecting gas into a stratum, soaking and extracting indoors and monitoring pressure and pressure gradient distribution rules of different positions from the well bottom of a gas injection well to the far end of the stratum in gas injection and extraction simulation processes.
Owner:PETROCHINA CO LTD

Flow rate level prediction method based on convolutional neural network deep learning

The invention provides a flow rate level prediction method based on convolutional neural network deep learning. The method comprises the following steps that: selecting an impact factor which is potentially related to the inflow flow rate of a reservoir as an input set; carrying out sample set classification and original input dataset construction; carrying out standardized processing on the original input dataset in the sample set; building a multilayer convolutional neural network; taking mean square error minimization as a loss function to determine prediction accuracy; carrying out networkparameter training; carrying out network performance testing; checking prediction accuracy; carrying out the rolling learning training on model parameters; automatically saving a learning training achievement, and automatically updating the knowledge record of a real-time library; and through a network model, carrying out calculation to obtain a final flow rate level prediction result. By use ofthe method, low-layer characteristics are combined to form high-layer characteristic fusion, so that an objective can be subjected to advanced abstract description, a data input pattern and a spatialand temporal distribution rule can be found through automatic learning, and therefore, the method can be effectively applied to the field of drainage basin water regimen forecasting.
Owner:CHANGJIANG SURVEY PLANNING DESIGN & RES

Optimization method for determining proportion of mixing light oil into heavy oil of ultra-deep well and light hydrocarbon mixer thereof

The invention discloses an optimization method for determining the proportion of mixing light oil into heavy oil of an ultra-deep well and a light oil mixer thereof. The method comprises the steps of: 1) establishing a multi-phase flow comprehensive pressure drop calculation model and a correction model; 2) deriving a calculation method for the temperature gradient of a fluid in a shaft of a light oil mixing well; 3) performing the multi-phase flow calculation of bent well sections of the ultra-deep well, and calculating the distribution rule of parameters in a borehole shape; 4) establishing an analysis model of production performance of mixing the light oil into the heavy oil; and 5) optimizing the proportion and production parameters of mixing the light oil into the heavy oil. The method realizes the simulation and analysis to the production performance of mixing the light oil into the heavy oil of the ultra-deep well. The production performance of mixing the light oil into the heavy oil of the ultra-deep well are quantificationally analyzed and simulated and the distribution rule of parameters such as pressure, density and velocity along the shaft can be obtained. The method can optimize the proportion and the production parameters of mixing the light oil into the heavy oil according to the productivity of an oil well. The optimum light oil mixing proportion and mixing pressure are preferably selected. The method and the mixer have extremely strong industrial applicability.
Owner:CHINA PETROLEUM & CHEM CORP +1
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