Water quality toc concentration analysis method based on rbm regression

Abstract

The invention discloses an RBM regression-based water TOC (total organic carbon) concentration analysis method. The method comprises the following steps: acquiring the spectrum data of lights emitted by a light source, going through TOC solutions with different known concentrations multiple times to obtain the absorption spectrum data corresponding to every concentration; respectively calculating the absorbance of the spectrum data; inputting all absorbance values to a restricted Boltzmann machine as training samples, and training to obtain a trained restricted Boltzmann machine corresponding to different iterations and reconstructed training samples corresponding to the different iterations; combining the reconstructed training samples to form new training samples, sending the new training samples to a BP nerve network model, and training to obtain a trained BP nerve network model; and processing a test sample in a sample training mode, combining the reconstructed test sample to form a new test sample, sending the new test sample to the BP nerve network model, and testing to obtain the TOC concentration of a solution to be detected. The method improves the TOC concentration inversion precision, improves the repeatability and the portability of a concentration inversion algorithm, and meets online detection precision requirements.

Description

technical field [0001] The present invention relates to water quality TOC concentration detection, specifically a water quality TOC concentration analysis method based on RBM regression. , that is, the inversion of solution TOC concentration when the traditional method has a large problem. Background technique [0002] TOC (Total Organic Carbon) is a comprehensive index that characterizes the total amount of organic matter in a water body. It represents the sum of the organic matter contained in the water body and directly reflects the degree of pollution of the water body by organic matter. At present, TOC measurement has been widely used in monitoring rivers, lakes and oceans. For the quality control of surface water, drinking water, industrial water, etc., TOC is also an important measurement parameter. In fact, TOC measurement has become the main detection method for water quality control in the world. In 2003, the four ministries and commissions of the state have offi...

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Problems solved by technology

from Figure 4 It can be seen from the figure that when the TOC concentration ranges from 0mg / L to 100mg / L, although the graph of the calculation result is basically linear, when inverting with a straight line at this time, there will be a large error in individual concentrations (see Table 1), and the accuracy of these concentrations can not meet the requirements

Since the existing methods can no longer meet the accuracy requirements of TOC solution concentration inversion, a new high-precision method is urgently needed to complete the online detection of TOC solution

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