3 results about "Convergence zone" patented technology

This application provides a method for analyzing and mapping thunderstorm disaster areas, including: acquiring data on the cross-sectional width distribution of valleys, data on the radius of curvature of the centerline, and data on the lateral position of the near-surface wind convergence zone within the valley; integrating the acquired data into a unified dataset; calculating the ratio of the radius of curvature to the valley width based on the radius of curvature data and valley width data in the unified dataset, identifying sharp bends where the ratio exceeds a preset threshold, and identifying potential asymmetric convergence areas; based on the location of the convergence center where the convergence zone gathers towards the outside of the bend, shifting the lateral positioning axis of the thunderstorm landing area from the valley floor centerline to the location of the convergence center, generating a corrected landing area positioning axis; and combining the adjusted thunderstorm landing area coordinates with the valley width distribution data to generate a landing area positioning layer in the disaster mapping, smoothing the boundaries of areas with high curvature, and forming a thunderstorm disaster landing area distribution map.

The invention provides a tropical convergence zone feature analysis method based on rainfall data, and belongs to the field of data analysis. The rainfall analysis problem of the tropical convergence zone is solved; the specific method comprises the following steps: obtaining standardized data; extracting a core characteristic index of the ITCZ from the standardized data; according to the core characteristic index of the ITCZ, predicting the future precipitation of the central latitude region; calculating water vapor flux and divergence of a central latitude area, and judging a corresponding relation between rainfall and water vapor polymerization: if a rainfall peak value is consistent with a flux convergence peak, indicating that the system is controlled by water vapor conveying; if excursion exists, the influence of thermal driving or sea temperature abnormity is explained, then the contribution proportion of specific humidity and wind speed to flux is decomposed, and the cause of ITCZ is obtained; according to the invention, through analysis and digital modeling of the rainfall data of the ITCZ area, the cause of the ITCZ is disclosed, and meteorological prediction of the ITCZ area is facilitated.

This invention relates to the field of meteorological radar signal processing and nowcasting technology, and proposes a near-term gale intelligent early warning system, method, and storage medium based on radial velocity characteristics. The system includes: a radar data preprocessing module for reading weather radar base data and constructing a radial velocity matrix; a semantic segmentation module for performing convergence zone semantic segmentation on the radial velocity matrix using an improved U-Net semantic segmentation network to identify retreating velocity zones and approaching velocity zones; an instance segmentation module for performing connected component analysis on the semantic segmentation results, extracting retreating velocity zone instances and approaching velocity zone instances, and calculating geometric parameters and velocity statistical characteristics; a convergence pair matching module for matching retreating velocity zone instances and approaching velocity zone instances based on spatial location and velocity gradient constraints to identify mid-level radial convergence characteristics; and an early warning decision module for calculating early warning indicators based on convergence intensity and vertical continuity, and classifying gale warning levels.