Abstract
Determination of ammonia nitrogen content in water is the basic item of the environmental water pollution, and is the key index to evaluate the water quality. This article designs a water quality monitoring system based on the on-line automatic ammonia nitrogen monitoring system, and establishes a forecasting model based on the weighted least squares support vector machine algorithm. The weighted least squares support vector machine algorithm increases the weight parameter setting, improves the speed and accuracy of prediction learning, and improves the robustness. In this article, a comparison between neural network model and weighted least square support vector machine model is made, which shows that the weighted least squares support vector machine model has better prediction accuracy.
Highlights
With the rapid development of social economy, water pollution has become an important environmental monitoring content
The weighted least squares support vector machine (WLS-SVM) is applied to the analysis of ammonia nitrogen content, and the model is established to improve the accuracy of the data
This article introduces that during on-line monitoring system on the water quality, the Weighted least squares support vector machine (WLS-SVM) model is applied to the analysis and prediction of ammonia nitrogen content measurement data
Summary
With the rapid development of social economy, water pollution has become an important environmental monitoring content. The method of on-line water quality and ammonia nitrogen content determination system [1] is often used in electrochemical method or the method of spectro photometry. Electrochemical method is based on the electrode sensor, the determination of the size of. Y. Wang the ammonia sensor electrode, the indirect determination of ammonia nitrogen content. Nessler’s points spectro photometric method based on light chromaticity determination, mercuric iodide and potassium iodide solution will react with ammonia and will generate red brown compound, chroma and water content of ammonia and nitrogen in a proportional relationship. The disadvantages of the method of spectro photometry [2] are that the reagent cost is relatively high, the determination time is long, the determination data are small, and the determination process is easy to be influenced by the environmental changes and other factors
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