Unbalanced data resampling method for ecological environment evaluation

An ecological environment and resampling technology, which is applied in the direction of instruments, calculations, character and pattern recognition, etc., can solve the problems of unsatisfactory classification results and the failure to consider the distribution of data sets, etc., to achieve high accuracy, improve quality, and increase the true positive rate Effect

Active Publication Date: 2021-08-24
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

These methods have a certain degree of randomness when synthesizing new minority classes, without considering the distribution of the data set, so the final classification results may not be ideal

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  • Unbalanced data resampling method for ecological environment evaluation
  • Unbalanced data resampling method for ecological environment evaluation
  • Unbalanced data resampling method for ecological environment evaluation

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Embodiment Construction

[0042] A kind of unbalanced data resampling method oriented to ecological environment evaluation of the present invention comprises the following steps:

[0043]Step 1. Collect ecological environment data and standardize the ecological environment data of each instance;

[0044] Standardization refers to the feature scaling process in feature engineering. The size difference between the indicators of the ecological environment data is sometimes very large. When the levels of the indicators are very different, if the original indicator value is directly used for analysis, the higher value will be highlighted. The role of higher indicators in the comprehensive analysis relatively weakens the role of indicators with lower numerical levels. In the case of not calculating the weight, the contribution of each indicator to the discrimination of a certain instance is equal. If these indicators are not standardized, then these values ​​with great differences will form an error message ...

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Abstract

The invention relates to an unbalanced data resampling method for ecological environment evaluation, which comprises the following steps of: 1, acquiring ecological environment data, and standardizing the ecological environment data of each instance; 2, calculating the data density of each instance and the quantity difference d between the majority class and the minority class; 3, calculating the distribution unbalance degree DI and the number unbalance degree IR of the minority class and the majority class; 4, performing oversampling on the minority class; and 5, undersampling the majority classes. The method has the advantages that the data density of each instance in the data set is used for measuring the uniformity degree of distribution, and oversampling and undersampling are carried out according to the unbalance degree of data distribution, so that the purpose of balancing data is achieved; the ecological environment data is further balanced, the quality of the data set is improved, and when the ecological environment quality evaluation is carried out, the accuracy is higher, and the true positive rate is increased.

Description

technical field [0001] The invention relates to the technical fields of ecological environment evaluation technology and data processing, in particular to an unbalanced data resampling method for ecological environment evaluation. Background technique [0002] Ecological environment assessment is to select representative, comparable and operable evaluation indicators and methods according to specific purposes, and to conduct qualitative or quantitative analysis and judgment on the quality of ecological environment. The types of ecological environment quality assessment mainly include: ecological security assessment, ecological risk assessment, ecosystem health assessment, ecosystem stability assessment, ecosystem service function assessment, and ecological environment carrying capacity assessment. Eco-environmental evaluation technology is generally realized by comprehensive evaluation technology, generally including principal component analysis method, fuzzy evaluation meth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06F18/10
Inventor 季一木苗冬冬张澳生徐鹤李鹏王汝传
Owner NANJING UNIV OF POSTS & TELECOMM
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