Method for excavating tropical cyclone motion track channel

A technology for tropical cyclones and moving trajectories, which is applied in the fields of climate sustainability, fluid dynamics experiments, and testing of machine/structural components. It can solve problems such as limited clustering methods and difficult evaluation of trajectory data similarity

Inactive Publication Date: 2010-07-07
SHENZHEN INST OF ADVANCED TECH
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Problems solved by technology

However, for different data types, the clustering methods are not the same, especially for the trajectory data type, the clustering methods invented at present are still quite limited, and each has certain defects and limitations. One of the reasons is that the trajectory data is faced with similarity evaluation. problem

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  • Method for excavating tropical cyclone motion track channel
  • Method for excavating tropical cyclone motion track channel
  • Method for excavating tropical cyclone motion track channel

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Embodiment Construction

[0025] The method for excavating the track channel of the tropical cyclone is mainly explained below in conjunction with the accompanying drawings.

[0026] Such as figure 1 As shown, the method for mining the tropical cyclone track channel includes the following process steps:

[0027] A. The track of the tropical cyclone is divided into grids, and the sub-track fragments of the tropical cyclone are obtained.

[0028] Firstly, the grid is used to segment the space and the track of the tropical cyclone. In the space gridding step, the entire planar space is divided into m×n grid unit spaces. In the fragmentation step of the full track, the complete track of the tropical cyclone is divided at the boundary of each grid unit to form sub-trajectories, so that each sub-track belongs to a certain grid unit. The segmentation method traverses all data points of all trajectories in order to determine whether adjacent data points exist in the same grid unit, so as to decide whether t...

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Abstract

The invention provides a method for excavating a tropical cyclone motion track channel, which comprises the following steps: A, segmenting the space and a tropical cyclone motion track by a grid to obtain segments of tropical cyclone motion sub-tracks; B, computing the similarity between the tropical cyclone motion sub-tracks by using the adjusted discrete Frechet distance; C, hierarchically clustering the tropical cyclone motion sub-tracks to obtain track clusters of the tropical cyclone motion sub-tracks; and D, connecting the track clusters of the tropical cyclone motion sub-tracks to obtain the tropical cyclone motion track channel. The method can effectively discover the tropical cyclone motion track channel, combines historical tropical cyclone path data to excavate the tropical cyclone motion behavior mode in specific areas, provides a direct and effective tool for analyzing and predicting typhoon disaster, and provides decision support for disaster prevention and reduction.

Description

【Technical field】 [0001] The invention relates to a method for excavating a track channel of a tropical cyclone. 【Background technique】 [0002] Tropical cyclones are a general term for non-frontal vortices with organized convection and definite cyclonic circulation generated on tropical or subtropical oceans, including tropical depressions, tropical storms, severe tropical storms, typhoons, strong typhoons and super strong typhoon. The research on the moving behavior patterns of tropical cyclones has significant significance for predicting and classifying the moving of tropical cyclones. As a spatio-temporal pattern of moving objects, track channel can determine the directional space area that is frequently visited, and the track channel of tropical cyclone is the directional space area frequently visited by tropical cyclone. [0003] Data mining is to extract or mine knowledge from a large amount of data. As an important method of data mining, cluster analysis can divide...

Claims

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Application Information

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IPC IPC(8): G06F17/30G01M10/00
CPCY02A90/10
Inventor 朱浩瀚罗军
Owner SHENZHEN INST OF ADVANCED TECH
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