Method for extracting feature string, device, network apparatus, and storage medium
US11379687B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2018 |
| Grant date | Jul 5, 2022 |
| Priority date | — |
| Expiry date | Sep 15, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are a method for extracting a feature string, a device, a network apparatus, and a storage medium. The method comprises: determining, for each candidate feature string, a transition probability for each pair of adjacent characters in the candidate feature string according to a first-order Markov transition probability matrix; detennining a transition entropy value of the candidate feature string according to the transition probability of each pair of adjacent characters and the logarithm of the transition probability; and labeling a candidate feature string having a transition entropy value greater than a pre-determined threshold as a first usable feature string, and using a valid first usable feature string as an extracted target feature string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.