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Water supply pipe network planning evaluating method on basis of species distribution

A water supply pipe network and evaluation method technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of lack of quantitative evaluation indicators in the planning and layout of the pipe network, and achieve the effect of scientific planning and design results.

Inactive Publication Date: 2013-03-13
GUANGZHOU URBAN PLANNING & DESIGN SURVEY RES INST
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This method has a clear theoretical basis, but it lacks relevant quantitative evaluation indicators for the planning and layout of the pipe network, and it has not completely shaken off the shackles of experience.

Method used

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  • Water supply pipe network planning evaluating method on basis of species distribution
  • Water supply pipe network planning evaluating method on basis of species distribution
  • Water supply pipe network planning evaluating method on basis of species distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In the study of fractals, there are many ways to measure the fractal dimension. For the graphs with a large number of bifurcations, such as rivers and water supply pipe networks, it is suitable to use the method of changing the observation scale to obtain the fractal dimension. The box counting method is easy to calculate and has a wide range of applications, so the box counting method is used for calculation.

[0045] Let F be a non-empty bounded subset on Rn, N δ (F) is the minimum number of sets with a maximum diameter of δ that can cover F, then the fractal dimension D of F is:

[0046] D = Lim δ → 0 Ln N δ ( F ) - Lnδ - - - ( ...

Embodiment 2

[0074] like figure 1 , 3 As shown, according to the calculation method of Embodiment 1, this embodiment calculates the example of the water supply network of the M project, and evaluates the layout of the water supply network at the current stage according to the calculation results, and optimizes the layout of the water supply network at the same time.

[0075] The range of the selected fractal scale invariant area is [100m, 10000m], and the initial grid size is set to 10000m×10000m.

[0076] (1) First run the box counting method VB program written for this research, and enter the pipe network fractal calculation system;

[0077] (2) Select and open the pipe network CAD file that requires fractal research;

[0078] (3) if Figure 4 As shown, enter the operation interface to perform grid calculation, and enter the lower left corner of the calculation grid (click with the mouse)

[0079] Input grid final equal fraction: 64

[0080] Enter the initial grid side length: 10000...

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Abstract

The invention relates to a water supply pipe network planning evaluating method on the basis of species distribution, which is characterized by comprising the following steps of: carrying out system initialization; opening a water supply pipe network planning drawing to be evaluated, which is in a dwg format; selecting a pipe network in the drawing as a set to be calculated; inputting calculating parameters into an AutoCAD prompt; calculating a fractal dimension D and a theoretic optimal dimension D<optimal> of the water supply pipe network; and according to the fractal dimension D and the theoretic optimal dimension D<optimal> of the water supply pipe network, which are obtained by calculation, automatically judging whether the water supply pipe network is reasonably planned and arranged, and outputting an evaluation conclusion. The calculated and evaluated rationality of the planning and the arrangement of the water supply pipe network of a specific project is utilized, and the water supply pipe network is further improved according to an optimal direction, so that the purpose of optimizing the planned result of the water supply pipe network is achieved.

Description

technical field [0001] The invention relates to water supply network planning, in particular to a method for evaluating whether the water supply network planning based on shape distribution is reasonable. Background technique [0002] The existing water supply network planning is often based on the experience of laying out pipelines along urban roads. The pipeline network layout of some projects is too dense, and the pipeline network layout of some projects is too sparse. In fact, the water supply network has an optimal distribution form, and the water supply network under the optimal distribution form is the most economical under the premise of satisfying the use function. The growth form of the water supply network has fractal characteristics, and the "fractal theory" can be applied to study the optimal distribution of the water supply network. [0003] Mandelbrot (MandeLbrot) once gave such a definition to fractal: a fractal is a shape whose components are similar to the...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 冯炳燕熊秋文
Owner GUANGZHOU URBAN PLANNING & DESIGN SURVEY RES INST
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