Method and apparatus for predicting dissolved oxygen in aquaculture

Abstract

The invention provides a method and apparatus for predicting dissolved oxygen in aquaculture. The method comprises: collecting dissolved oxygen data of an aquaculture pond; carrying out ensemble empirical mode decomposition on the dissolved oxygen data to obtain a high-frequency term, an intermediate-frequency term, a low-frequency term and a residual component; carrying out modeling on the high-frequency term and the intermediate-frequency term by using a least square support vector machine and carrying out dissolved oxygen prediction; carrying out modeling on the low-frequency term by using a mind-evolutionary-computation-based optimized BP neural network and carrying out dissolved oxygen prediction; carrying out modeling on the residual component by using a gray forecasting model and carrying out dissolved oxygen prediction; and superposing prediction results of the least square support vector machine, the mind-evolutionary-computation-based optimized BP neural network, and the gray forecasting model to obtain a prediction value of dissolved oxygen in aquaculture. Therefore, the changing situation of the dissolved oxygen can be obtained accurately; and because the high-frequency term, the intermediate-frequency term, the low-frequency term and the residual component are predicted by using different dissolved oxygen prediction methods, accurate prediction of dissolved oxygen data in aquaculture can be improved.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to an aquaculture dissolved oxygen prediction method and device. Background technique [0002] China is a big country in aquaculture, and the guarantee of the output and quality of aquatic products depends on whether the quality of aquaculture water is suitable for the survival of aquatic organisms. Many factors can affect water quality, including dissolved oxygen, ammonia nitrogen levels, pH, nitrates, artificial feeding, pesticide application, rainfall, and solar radiation. Dissolved oxygen is an essential condition for the survival of aquatic organisms. When the concentration of dissolved oxygen is lower than 3mg / L, fish will die. Therefore, it is of great significance to study the prediction method of dissolved oxygen in aquaculture water quality. [0003] There are many existing prediction methods, which are mainly divided into two types: the first type is traditional predi...

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Problems solved by technology

However, the existing prediction methods all have a large amount of calculation and a high error accumulation rate, which does not meet the needs of aquaculture enterprises for short-term prediction of water quality.

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