Small town three-dimensional space performance evaluation method

Abstract

The invention discloses a small town three-dimensional space performance evaluation method, and relates to the technical field of town performance evaluation. Comprising the steps of obtaining three dimensions of town performance as three system layers of space performance evaluation respectively, obtaining town data information, screening important indexes based on the data information in combination with the three system layers, and constructing a town performance three-dimensional evaluation system and a three-dimensional space model based on the three system layers and the corresponding important indexes. And calculating town data information based on the town performance three-dimensional evaluation system to obtain performance points, putting the performance points into the three-dimensional space model, and analyzing the performance points to obtain town performance evaluation. The method can provide an effective thought for urban ecological environment protection, social and economic development and space optimization.

Description

Technical Field

[0001] The present invention relates to the technical field of town performance evaluation, and in particular to a three-dimensional space performance evaluation method for a small town. Background Art

[0002] In the field of urban and rural planning, most of the technical methods for spatial performance evaluation use the Delphi method, the analytic hierarchy process (AHP), the entropy weight method, etc. to determine the weights of indicators, and use research methods in economics and ecology to quantify spatial performance, such as the SBM model in data envelopment analysis, the pressure-state-response model (PSR), and the multivariate regression model. Most of the performance studies on a specific functional space in a city use the ArcGIS platform to conduct quantitative evaluation through methods such as GIS spatial analysis and mathematical quantitative models. However, the current technical methods tend to focus on the comprehensive performance evaluation of towns, ignoring the static balance and dynamic coordination evaluation of spatial performance, and these methods are relatively unintuitive and difficult to understand.

[0003] Therefore, it is an urgent problem for those skilled in the art to propose a three-dimensional spatial performance evaluation method for small towns to solve the defects of the existing technology. Summary of the invention

[0004] In view of this, the present invention provides a three-dimensional spatial performance evaluation method for small towns, which can provide effective ideas for urban ecological environment protection, social and economic development and spatial optimization.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A small town three-dimensional space performance evaluation method includes the following steps:

[0007] S1. Obtain the three dimensions of urban performance as three system layers of spatial performance evaluation;

[0008] S2, obtain town data information, and select important indicators based on the data information and the three system layers;

[0009] S3. Construct a three-dimensional evaluation system and a three-dimensional spatial model of urban performance based on the three system layers and corresponding important indicators;

[0010] S4. Calculate town data information based on the three-dimensional town performance evaluation system to obtain performance points;

[0011] S5. Place the performance points into a three-dimensional spatial model and analyze them to obtain town performance evaluation.

[0012] In the above method, optionally, the dimensions in S1 include: ecology, economy and society.

[0013] In the above method, optional methods for obtaining town data information in S2 include: on-site surveys, government departments and open source data collection.

[0014] In the above method, optionally, generating performance points in S4 includes:

[0015] S41. Determine the original value of the evaluation index;

[0016] S42. Standardize the indicator data and perform dimensionless processing on the indicators;

[0017] S43. Determine the weight of the indicators based on the subjective and objective comprehensive weighting method;

[0018] S44. Calculate the ecological performance evaluation value, social performance evaluation value and economic performance evaluation value corresponding to the three dimensions of urban performance respectively to obtain the performance of the town.

[0019] In the above method, optionally, in S42, the Min-max standardization method is used to standardize the indicator data.

[0020] The above method,optionally, the town evaluation in S5 includes static comprehensive evaluation and balance analysis;

[0021] Static comprehensive evaluation is used to obtain the static performance value of the three-dimensional space of the town;

[0022] Balance analysis is used to obtain the equilibrium state of the three dimensions of urban spatial performance.

[0023] It can be seen from the above technical solution that, compared with the prior art, the present invention provides a three-dimensional spatial performance evaluation method for small towns, which has the following beneficial effects: the present invention obtains the static performance value of the three-dimensional space of the town through static comprehensive evaluation, analyzes the dynamic development trend of the spatial performance of grassland towns through the static performance value of continuous time, and then obtains the equilibrium state of the three dimensions of the spatial performance of grassland towns through balance analysis, providing effective ideas for urban ecological environment protection, social and economic development and spatial optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 A flow chart of a small town three-dimensional space performance evaluation method disclosed in the present invention;

[0026] Figure 2A three-dimensional space model diagram disclosed in the present invention;

[0027] Figure 3 This is a three-dimensional evaluation system diagram of urban performance disclosed in the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In this application, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] Reference Figure 1 and Figure 2 As shown, the present invention discloses a method for evaluating the three-dimensional space performance of a small town, comprising the following steps:

[0031] S1. Obtain the three dimensions of urban performance as three system layers of spatial performance evaluation;

[0032] S2, obtain town data information, and select important indicators based on the data information and the three system layers;

[0033] S3. Construct a three-dimensional evaluation system and a three-dimensional spatial model of urban performance based on the three system layers and corresponding important indicators;

[0034] S4. Calculate town data information based on the three-dimensional town performance evaluation system to obtain performance points;

[0035] S5. Place the performance points into a three-dimensional spatial model and analyze them to obtain town performance evaluation.

[0036] Furthermore, the dimensions in S1 include: ecology, economy and society.

[0037] Furthermore, the methods of obtaining urban data information in S2 include: field surveys, government departments, and open source data collection.

[0038] Further, see Figure 3 As shown, the three-dimensional evaluation system of urban performance in S3 includes the construction of three system layers: social space system, economic system and ecological system;

[0039] The social-spatial system layer is divided into population concentration, spatial structure and policy management; the economic system layer is divided into resource development and land use; and the ecosystem layer is divided into environmental emissions and environmental governance.

[0040] Specifically, population concentration is the population intensity index and population migration index determined based on population size, density and urbanization rate;

[0041] The spatial structure is the spatial morphological suitability index and spatial morphological expansion index determined based on the average patch area and the average growth rate of built-up area land;

[0042] Policy management is a management index and policy index determined based on safety service levels and public participation.

[0043] Resource development is an economic intensity index and resource security index determined based on GDP per capita and the proportion of non-agricultural industries;

[0044] Land use is the land use intensity index and transportation support index determined based on the site's GDP and land development intensity.

[0045] Environmental emissions refer to the environmental quality index and pollution load index determined based on the emission compliance rate of pollution sources and the air quality compliance rate;

[0046] Environmental governance is an ecological constraint index and ecological governance index determined based on vegetation coverage and land desertification ratio.

[0047] Furthermore, the performance points generated in S4 include:

[0048] S41. Determine the original value of the evaluation index;

[0049] S42. Standardize the indicator data and perform dimensionless processing on the indicators;

[0050] S43. Determine the weight of the indicators based on the subjective and objective comprehensive weighting method;

[0051] S44. Calculate the ecological performance evaluation value, social performance evaluation value and economic performance evaluation value corresponding to the three dimensions of urban performance respectively to obtain the performance of the town.

[0052] Furthermore, the Min-max normalization method is used in S42 to normalize the indicator data.

[0053] Specifically, Min-max normalization is based on the maximum value Max and the minimum value Min of the original data, normalizing the original value X to X ij , divided into positive indicator standardization and negative indicator standardization, the expression is:

[0054] Positive indicator normalization:

[0055] Negative indicator normalization:

[0056] Furthermore, the dimensionless processing in S42 includes: ij is the jth evaluation index in year i, u ij is the dimensionless value of the jth indicator in the i-th year, and the expression is:

[0057]

[0058] Among them, a maxj 、a minj are the optimal and worst values ​​of the j-th indicator respectively.

[0059] Furthermore, in S43, the subjective and objective comprehensive weighting method is a combination of the entropy method and the hierarchical analysis method.

[0060] Specifically, according to the relative importance level table of TLSaaty, each indicator is analyzed and judged; by comparing the indicators two by two, a judgment matrix is ​​formed, and the weight is calculated. In order to reduce the interference of subjective factors on the judgment matrix and logic and ensure the logical accuracy of the judgment matrix construction, the constructed judgment matrix needs to be checked for consistency: First, the maximum eigenvalue λ in the judgment matrix is ​​calculated. max And the consistency index CI, the expression is:

[0061]

[0062] Then calculate the consistency ratio CR, the expression is:

[0063]

[0064] Among them, RI is the average random consistency index; if CR < 0.1, the judgment matrix is ​​consistent, otherwise the judgment matrix needs to be corrected and reconstructed. Secondly, the entropy weight method is used to calculate the indicator weight. According to the definition of information entropy, the discrete degree of the indicator and the degree of influence on the comprehensive evaluation of grassland urban space performance can be judged according to the size of the information entropy of each indicator, and the weight of each indicator can be calculated by the entropy value to provide a basis for the comprehensive evaluation of grassland urban space performance. Among them, the information entropy of the jth indicator e j , the expression is as follows:

[0065]

[0066] Where K is a constant, the expression is: The weight w of the jth indicator j The expression is:

[0067]

[0068] Finally, the weight of the sample index is calculated by the weighted summation formula

[0069] Furthermore, the town evaluation in S5 includes static comprehensive evaluation and balance analysis;

[0070] Static comprehensive evaluation is used to obtain the static performance value of the three-dimensional space of the town;

[0071] The dynamic development trend of grassland town spatial performance is analyzed through the static performance value of continuous time;

[0072] Balance analysis is used to obtain the equilibrium state of the three dimensions of urban spatial performance.

[0073] Furthermore, the static comprehensive evaluation includes: the ecological, economic and social performance evaluation values ​​in the i-th year are x i ,y i and z i , the expression is as follows:

[0074]

[0075] Among them, P j Refers to the weight corresponding to each indicator, j = 1, 2, 3, ..., 15. In the three-dimensional evaluation model of grassland town spatial performance, the best performance point M0 = (5, 5, 5), the worst performance point is (1, 1, 1), and any performance point M i =(x i ,y i ,z i ), where x i ,y i ,z i ∈[1,5], the performance distance is calculated from any performance point. The smaller the performance distance, the greater the static performance evaluation value, that is, the better the static performance of the urban space. The performance distance expression is:

[0076]

[0077] Furthermore, static balance refers to the equilibrium state of grassland town spatial performance in a certain period of time. The degree of static balance is expressed by performance point M. i The distance D from the line x=y=z i As the evaluation criteria, the expression is:

[0078]

[0079] Where s is the direction vector of the straight line x=y=z. i The smaller it is, the higher the degree of static balance in the i-th year.

[0080] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0081] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A three-dimensional spatial performance evaluation method for small towns, characterized in that: The following steps are involved: S1. Obtain the three dimensions of urban performance as three system layers of spatial performance evaluation; S2, obtain town data information, and select important indicators based on the data information and the three system layers; S3. Construct a three-dimensional evaluation system and a three-dimensional spatial model of urban performance based on the three system layers and corresponding important indicators; S4. Calculate town data information based on the three-dimensional town performance evaluation system to obtain performance points; S5. Place the performance points into a three-dimensional spatial model and analyze them to obtain town performance evaluation.

2. A small town three-dimensional space performance evaluation method according to claim 1, characterized in that: The dimensions in S1 include: ecology, economy and society.

3. A small town three-dimensional space performance evaluation method according to claim 1, characterized in that: The methods of obtaining urban data information in S2 include: field surveys, government departments and open source data collection.

4. A small town three-dimensional space performance evaluation method according to claim 1, characterized in that: The performance points generated in S4 include: S41. Determine the original value of the evaluation index; S42. Standardize the indicator data and perform dimensionless processing on the indicators; S43. Determine the weight of the indicators based on the subjective and objective comprehensive weighting method; S44. Calculate the ecological performance evaluation value, social performance evaluation value and economic performance evaluation value corresponding to the three dimensions of urban performance respectively to obtain the performance points of the town.

5. A small town three-dimensional space performance evaluation method according to claim 4, characterized in that: In S42, the Min-max standardization method is used to standardize the indicator data.

6. A small town three-dimensional space performance evaluation method according to claim 1, characterized in that: The town evaluation in S5 includes static comprehensive evaluation and balance analysis; Static comprehensive evaluation is used to obtain the static performance value of the three-dimensional space of the town; Balance analysis is used to obtain the equilibrium state of the three dimensions of urban spatial performance.

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