A long-term prediction method of ntft-ha sea level considering tidal evolution

Through the NTFT-HA long-term sea level prediction method, combined with the harmonic pseudo-continuation and standard time-frequency transform NTFT, the problems of edge effect and frequency offset in tidal prediction are solved, and higher-precision long-term tidal prediction is achieved, supporting accurate prediction of sea level and marine military activities.

CN118228583BActive Publication Date: 2025-10-10INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
2 Cites 0 Cited by

Patent Information

Application Number
CN202410331145.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-03-22
Publication Date
2025-10-10
Estimated Expiration
2044-03-22

AI Technical Summary

Technical Problem

Existing tidal prediction methods have edge effects and frequency offset problems in long-term predictions, resulting in low prediction accuracy and inability to accurately reflect the long-term evolution trend of tides.

Method used

The harmonic pseudo-continuation method is combined with the standard time-frequency transform (NTFT) and harmonic analysis (HA). Through the NTFT-HA long-term sea level forecast method, the edge effect is avoided, the long-term evolution trend of the main tidal components is obtained, and the prediction accuracy is improved.

Benefits of technology

The accuracy of long-term tidal predictions has been improved, which can more accurately reflect the long-term evolution trend of tides and provide technical support for future sea level predictions.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application provides a long-term prediction method of NTFT-HA sea level considering tidal evolution, adopts a harmonic pseudo-continuation HPC method to avoid edge effect of standard time-frequency conversion NTFT, considers long-term evolution trend of main tidal components on the basis of long-term prediction by using harmonic analysis HA, combines the time-varying nature of harmonic constants obtained by the standard time-frequency conversion NTFT with the high frequency resolution of the harmonic analysis HA, improves the long-term prediction accuracy of the marine tide, and provides technical support for future sea level prediction and marine military activities.
Need to check novelty before this filing date? Find Prior Art