Nonlinear method for describing urban surface landscape structures

Abstract

The invention relates to a nonlinear method for describing urban surface landscape structures. The method comprises the following steps of: 1, temperature retrieval: calculating a radiation energy value, a radiation brightness temperature and a surface temperature; 2, selecting a temperature difference via a measure in thermal field pattern study, assuming that an image comprises M*N pixels, using a group of square boxes with different scales <epsilon> to cover (M / <epsilon>*N / <epsilon>) the whole image area, calculating the temperature difference <delta>T<epsilon>=(Tmax-Tmm) / <epsilon>, imaging <delta>T<epsilon>=(Tmax-Tmm) / <epsilon> as the height of a curved surface of the image, carrying out covering by using <delta>T<epsilon>+1 boxes, and then solving an area measure by using <micron>(<epsilon>)=(<delta>T<epsilon>+1) / <sigma>(<delta>T<epsilon>); 3, assuming that q is greater than -10 and smaller than 10, calculating a partition function xq(<epsilon>), solving a quality index number <tau>(q) in a log-log coordinate system; 4, calculating <alpha>(q) by using a formula <alpha>(q)=(<tau>(q+1)-<tau>(q-1)) / 2; 5, calculating f(<alpha>) by using a formula f(<alpha>)=q<alpha>(q)-<alpha>(q); and 6, describing texture parameters.

Description

technical field [0001] The invention relates to a method for modeling the texture structure of urban thermal environment field. Background technique [0002] Heat islands are created by cities themselves. In addition to the influence of external weather conditions such as wind speed and air pressure, this "itself" should refer to the urban surface structure, the spatial structure or arrangement of ground buildings, and human factors. In the process of urban development, changes in the surface structure inevitably change the distribution of solar radiation, resulting in differences in surface radiation and atmospheric temperature between cities and suburbs. The difference in temperature between cities and suburbs is the so-called urban heat island effect, which has long been received people's attention. [0003] On the one hand, changes in the surface structure lead to changes in land cover types, such as soil ground changing to cement ground, vegetation reduction, etc. Stu...

AI Technical Summary

Problems solved by technology

Although both landscape ecology and fractal can describe the pattern of urban thermal field and reflect the scale characteristics of urban thermal field, landscape ecology lacks the consideration of self-similarity and singularity measurement of thermal field itself, while single fractal cannot Reflecting the multi-scale characteristics of the thermal field

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