Nonlinear method for describing urban surface landscape structures

A landscape structure and non-linear technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as single fractals failing to reflect the multi-scale characteristics of thermal fields

Inactive Publication Date: 2017-07-07
XUCHANG UNIV
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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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  • Nonlinear method for describing urban surface landscape structures
  • Nonlinear method for describing urban surface landscape structures
  • Nonlinear method for describing urban surface landscape structures

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Embodiment Construction

[0028] The following is a specific description of the present invention according to the implementation examples.

[0029] Calculate the urban thermal environment field according to the following steps:

[0030] 1. Temperature inversion: calculate radiant energy value, radiant brightness temperature, and ground temperature;

[0031] 2. The measurement in this thermal field pattern study selects the regional temperature difference. Assuming that the image is M×N pixels, a set of square boxes with different scales ε is used to cover the entire image area (requires (M / ε)×(N / ε ) pieces), calculate the temperature difference ΔT in each box ε =(T max -T min ) / ε, put ΔT ε Imagine as the height of the image surface, and then use ΔT ε +1 box to cover, you can use μ(ε)=(ΔT ε +1) / ∑(ΔT ε +1) to obtain the area measure;

[0032] 3. Take -10q (ε), seek quality index τ(q) in double logarithmic coordinate system;

[0033] 4. Use the formula α(q)=(τ(q+1)-τ(q-1)) / 2 to calculate α(q); ...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 高歆
Owner XUCHANG UNIV
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