4 results about "Multiple methods" patented technology

The invention discloses a water supply pipe network water hammer early warning method and system, relates to the technical field of pipe network safety monitoring, and solves the technical problem that a water hammer phenomenon judgment result is inaccurate due to the fact that multiple analysis methods for adapting to specific application scenes do not exist in the prior art. A water hammer triggering mechanism is determined through a steady-state pressure multiple method, and whether a first water hammer state occurs or not is judged based on the water hammer triggering mechanism; if yes, judging whether a second water hammer state occurs or not through a pressure slope method; performing water hammer phenomenon identification through a long and short time window method; judging whether a pre-water hammer phenomenon occurs or not; obtaining a shortest path through a dynamic time warping algorithm, obtaining warping pressure data through the shortest path, and judging whether a pre-water hammer phenomenon occurs in combination with a square correlation coefficient; judging whether a water hammer event occurs or not according to the early warning signal; according to the method, mutual verification is carried out in the water hammer event judgment through multiple judgment mechanisms, and the judgment accuracy and reliability are improved.

The application relates to the field of element fusion, and discloses a multi-method marine element fusion assimilation system based on multi-source observation data, which is used for solving the problems of limited adaptability, rigid fusion strategy and insufficient physical consistency of an existing single assimilation method. The system comprises the following steps: performing bias correction and quality control on multi-source original observation data to form a standardized observation set; independently generating corresponding single-method analysis fields and uncertainty fields by parallel operation of at least two assimilation methods; for each spatial grid point, generating a consensus field based on the numerical values of all single-method analysis fields, and calculating dynamic fusion weights according to the deviation degrees of the analysis values and the uncertainty of each method and the consensus field; and weighting and fusing the single-method analysis fields by using the weights. The application realizes adaptive fusion of the advantages of multiple methods, and significantly improves the precision and physical consistency of the marine analysis field.

The invention relates to the field of element fusion, and discloses a multi-method ocean element fusion assimilation system based on multi-source observation data, which is used for solving the problems of limited adaptability, rigid fusion strategy and insufficient physical consistency of the existing single assimilation method. Comprising the following steps: performing deviation correction and quality control on multi-source original observation data to form a standardized observation set; operating at least two assimilation methods in parallel to independently generate a corresponding single-method analysis field and an uncertainty field; aiming at each space grid point, generating a consensus field based on the numerical values of all single-method analysis fields, and calculating a dynamic fusion weight according to the analysis value of each method and the degree of deviation between the uncertainty and the consensus field; and carrying out weighted fusion on each single-method analysis field by utilizing the weight. According to the method, adaptive fusion of advantages of multiple methods is realized, and the precision and physical consistency of a marine analysis field are remarkably improved.

A quantitative evaluation method for in-situ gas content and occurrence state in shale / coal formations based on multi-method coupling includes the following steps: 1. Establishing an in-situ analytical experimental setup; 2. Implementing the in-situ analytical experimental procedure; 3. Data processing and parameter summarization; 4. Evaluating in-situ gas content using the USBM method; 5. Evaluating in-situ gas content using the polynomial method; 6. Evaluating in-situ gas content using the ACF method; 7. Evaluating in-situ gas content using the MCF method; 8. Evaluating in-situ gas content using the isotope fractionation method (CIF method); 9. Comparative analysis and comprehensive evaluation of the results from multiple methods. This method establishes a novel approach for the quantitative identification of adsorbed / free gas based on the isotope fractionation mechanism, achieving accurate quantitative characterization of in-situ gas content and gas occurrence state in deep unconventional reservoirs. It provides a scientific basis for reserve assessment, selection of favorable targets, and optimization of development schemes, and is applicable to both deep shale gas and deep coal gas.