4results about How to "Reduce computational workload" patented technology

The invention provides an extraction method, an extraction system and extraction equipment for a key fragment of a metal organic framework material. The extraction method comprises the following steps: obtaining a crystal structure file of the metal organic framework material; converting the crystal structure into a crystal diagram; obtaining a key fragment sub-graph according to the crystal graph and an extraction rule; based on the key fragment subgraph, identifying a hydrogen deficiency site, obtaining a hydrogen deficiency site coordination environment, complementing hydrogen atom information, and obtaining a key fragment; and associating the crystal structure of the metal organic framework material with the key fragment to obtain a database, thereby completing the extraction of the key fragment of the metal organic framework material. According to the technical scheme provided by the invention, the key fragments of the metal organic framework material can be accurately and effectively extracted, so that the metal organic framework structure database is established and is used for calculating and analyzing an electronic structure and screening the metal organic framework material with special performance.

The application is a kind of water pump water turbine runner variable load and start-stop machine fatigue damage conversion method. The application relates to the technical field of water pump water turbine operation safety and life assessment, and aims at the engineering difficulty that the existing technology cannot quantitatively equivalent conversion of fatigue damage caused by variable load operation and start-stop machine working condition fatigue damage. The application constructs a typical working condition sample set by discretizing the unit load interval, establishes a runner multi-physical field coupling finite element model; the linear interpolation method is used to analyze the stress response of the actual random variable load interval and the equivalent symmetric cyclic stress; based on the Miner linear cumulative damage theory and the power law relationship of material S-N curve, the damage conversion coefficient of variable load cycle is derived; and then the total equivalent start-stop machine number is obtained. The application realizes the unified quantification of variable load and start-stop machine fatigue damage, and the total equivalent start-stop machine number can be directly used as the unified evaluation index of runner life assessment, which provides a scientific basis for water pump water turbine unit operation and maintenance decision and overhaul plan.

The invention provides an offshore wind plant DC current collection system topology evaluation and decision-making method and device based on combination weighting and TOPSIS, and the method comprises the steps: obtaining a plurality of alternative topology schemes, constructing a comprehensive evaluation index system, and carrying out the preprocessing of all indexes in the comprehensive evaluation index system, and obtaining a standardized index matrix; based on the standardized index matrix, obtaining the subjective weight of each index by adopting an analytic hierarchy process, and obtaining the objective weight of each index by adopting an entropy evaluation method; fusing the subjective weight and the objective weight based on a preset fusion principle to obtain a combined weight; performing hard screening on the alternative topology schemes based on preset engineering constraints; based on the combined weight, comprehensively evaluating the alternative topology schemes subjected to hard screening by adopting an approximate ideal solution sorting method, and calculating the relative closeness of each alternative topology scheme to the positive ideal solution and the negative ideal solution; and based on the relative close degree, outputting a comprehensive score, a scheme sequence and an optimal recommendation scheme of the alternative topology scheme.

This invention discloses a method for assessing the technical condition of highway bridges based on matrix operations, belonging to the fields of bridge engineering and computer application technology. Based on a four-level hierarchical assessment system, this invention constructs a matrix operation model framework. Through complete matrix chain operations—creating an initial matrix, a defect scaling matrix, a deduction matrix, a sorting matrix, an actual deduction matrix, and a component score matrix—it unifies steps such as component defect deduction, the impact of multiple defects, and weight synthesis into a standardized matrix transformation process. Then, it calculates component technical condition scores, constructs component score vectors, and combines weight corrections to calculate structural scores and overall bridge scores. Finally, it determines the bridge's technical condition level by referring to a grading table. This invention transforms the complex assessment process into standardized matrix operations, significantly improving assessment efficiency and accuracy, and achieving automation and standardization of the assessment process.