4results about How to "Reliable theoretical basis" patented technology

This invention discloses a method for monitoring the state trends of hydropower units based on two-stage signal decomposition and the IBiLSTM model. The method involves collecting vibration signals from the hydropower units for preprocessing; constructing the ITGCOA optimization algorithm and designing a fitness function; using the ITGCOA optimization algorithm to adaptively optimize the SVMD and BAACMD models, achieving initial decomposition of the preprocessed signal and secondary decomposition of the sub-mode component with the highest center frequency obtained from the initial decomposition; calculating the fuzzy entropy values ​​of the remaining sub-mode components for reconstruction; and fusing the high-frequency feature sub-sequences obtained from the secondary decomposition with the reconstructed feature sub-sequences to construct the input sequence of the prediction model. This input sequence is then used to construct the IBiLSTM prediction model for monitoring the state trends of hydropower units, achieving high-precision prediction. Compared with existing technologies, this invention improves the efficiency and accuracy of hydropower unit state trend prediction, accurately warns of abnormal unit operating conditions, ensures the safe and stable operation of the units, and improves the overall efficiency of the power plant.

This invention discloses a method for detecting the structure of iron powder combustion products, belonging to the field of detection methods. This method measures elemental iron (Fe). 0 The content of ferrous iron (Fe) was determined. 2+ The content of ferric iron (TFe) was determined; the content of total iron (TFe) was calculated; and the content of ferric iron (Fe) was calculated. 3+ The content of oxide components was calculated, including ferrous oxide, ferric oxide, and magnetite. The radii of elemental iron, ferrous oxide, ferric oxide, and magnetite were also calculated. Reliable physical and chemical analysis units were used to obtain measurement data, and then mathematical calculations were performed to obtain accurate and reliable information on the composition and structure of iron powder oxidation products, providing a solid theoretical basis for the application of iron powder as a metal particle fuel.

The one or more embodiments of the specification provide a cell radiosensitivity determination method, comprising: adopting a preset cell cycle arrest method to process a plurality of cell test groups of target cells respectively, to obtain a plurality of cell test groups with different G1 phase proportions; wherein the G1 phase proportion is the proportion of cells in the G1 phase in the cell test group; performing a radiation operation on the plurality of cell test groups, and determining a cell biological index in each cell test group after the radiation operation; based on the G1 phase proportion of each cell test group and the corresponding cell biological index, constructing a data model for indicating the corresponding relationship between the G1 phase proportion and the cell biological index of the target cell, for evaluating the radiation sensitivity of the target cell.

The invention discloses a turbine pump health state detection method based on a fusion trend sensitivity index, belongs to the technical field of turbine pump vibration detection, solves the technical problem of inaccurate health state characterization, and comprises the following steps: obtaining an acceleration signal and a displacement signal of a turbine pump in a hot test run process of an engine; processing the acceleration signal, and calculating to obtain an acceleration signal feature; adopting a two-dimensional holographic spectrum algorithm to extract displacement signal features; and the acceleration signal features and the displacement signal features are fused, a fusion trend sensitivity index is obtained, and the health state of the turbine pump of the liquid rocket engine is obtained. The method is used for judging the health state of the turbine pump of the engine and managing the operation of the engine.