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Method for softly measuring dioxin concentrations by adoption of case-based reasoning

A soft-sensing and case-based technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as slow training speed, poor application effect of soft-sensing methods, lack of certain hidden layers and number of nodes, etc., to achieve Improved accuracy, beneficial effects for real-time applications

Inactive Publication Date: 2018-05-29
BEIJING UNIV OF TECH
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Problems solved by technology

However, when using neural network modeling, there is a lack of effective methods for determining the hidden layer and the number of nodes; the support vector machine modeling method for large data sets, the training speed is slow, and the selection of parameters is uncertain; The choice is a problem
Therefore, the application of these soft-sensing methods is ineffective

Method used

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  • Method for softly measuring dioxin concentrations by adoption of case-based reasoning
  • Method for softly measuring dioxin concentrations by adoption of case-based reasoning
  • Method for softly measuring dioxin concentrations by adoption of case-based reasoning

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Embodiment Construction

[0049] The sample data comes from 11 groups of data of a certain waste incineration treatment plant. Taking the leave-one-out cross-validation as an example, the specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0050] like figure 1 As shown, a soft-sensing method for dioxin concentration using case-based reasoning includes the following steps:

[0051] (1) Use mutual information method to select feature variables; for 11 sets of historical data obtained (including 13 feature variables x 1 ~x N And the corresponding data of dioxin concentration y, the 13 characteristic variables include: furnace temperature x 1 , Smoke temperature at bag outlet x 2 , Boiler outlet flue temperature x 3 , flue gas flow x 4 and the oxygen content in the flue gas x 5 , water content x 6 , carbon monoxide content x 7 , carbon dioxide content x 8 , sulfur dioxide content x 9 , Nitrogen oxide content x 10 , Hyd...

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Abstract

The invention discloses a method for softly measuring dioxin concentrations by adoption of case-based reasoning. The method comprises the following steps of: (1) selecting feature variables by adoption of a mutual information method; (2) distributing weights of the feature variables by adoption of the mutual information method; (3) obtaining a target case; (4) calculating a similarity between thetarget case and a source case by adoption of an Euclidean distance-based similarity assessment method, and retrieving K similar cases according to a K-neighbor method; (5) reusing dioxin concentrationvalues of the K similar cases to obtain a dioxin concentration soft measurement value of the target case; (6) taking the target case and the corresponding dioxin concentration soft measurement valueas a new source case and storing the new source case in a case library for next dioxin concentration solution; and (7) repeating the steps (3) to (6) so as to realize the real-time prediction of the dioxin concentration.

Description

technical field [0001] The invention belongs to the technical field of municipal solid waste incineration, and in particular relates to a soft measurement method of dioxin concentration using case reasoning, and further relates to a method of feature selection and weight distribution using mutual information, and then using case reasoning technology to analyze the dioxin concentration in the process of waste incineration A method for real-time measurement of the concentration of dioxins produced. Background technique [0002] In recent years, with the increasing urban population density in my country, the construction of urban solid waste treatment facilities has been significantly accelerated. The national medium- and long-term science and technology development plan proposes to develop unconventional pollutant control technology, waste and other resource utilization technology, and establish a technology demonstration model for the development of circular economy. Municip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16C20/70
Inventor 严爱军耿庆杰
Owner BEIJING UNIV OF TECH
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