2results about How to "Narrow down the collection" patented technology

The application discloses a network fault root cause positioning method and operation and maintenance equipment, relates to the technical field of network fault positioning, and is used for improving the accuracy of network fault root cause positioning.In the method, the operation and maintenance equipment constructs an elastic backtracking window associated with a network topology delay, combines a time-space alignment drift degree to quantify a cause-effect relationship, establishes a more reasonable log searching interval for each candidate root cause node, reduces time axis out-of-range time sequence misplacement of a preset window range, avoids a situation that related technology is difficult to capture the correlation between the two, and improves the accuracy of network fault root cause positioning.

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.