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Sparse limited non-negative matrix decomposition algorithm based ultrafiltration membrane water treatment prediction method

A non-negative matrix decomposition, sparse limited technology, applied in electrical digital data processing, special data processing applications, computing and other directions, can solve problems such as difficult to determine network topology, achieve fast prediction speed, high optimization accuracy, adaptability good performance and predictability

Inactive Publication Date: 2015-10-28
HOHAI UNIV
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Problems solved by technology

However, ANN has the following disadvantages: 1. The prediction result is only a local minimum, not a global minimum; 2. It is difficult to determine its network topology; 3. It is prone to overfitting problems

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  • Sparse limited non-negative matrix decomposition algorithm based ultrafiltration membrane water treatment prediction method
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  • Sparse limited non-negative matrix decomposition algorithm based ultrafiltration membrane water treatment prediction method

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[0033] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] Such as figure 1 The basic flow chart of the present invention shown is based on the ultrafiltration membrane water treatment prediction method of the sparse restricted non-negative matrix factorization algorithm, comprising the following steps:

[0035] Step 1: Establish a predictive model for the ultrafiltration membrane wastewater treatment process using the sparse-restricted non-negative matrix factorization algorithm. The specific process is as follows:

[0036] First, define the objective function F of the sparse restricted non-negative matrix factorization algorithm:

[0037] F(W,H)=||V-WH|| 2 =∑ ij [V ij -(WH) ij ] 2 (1)

[0038] In formula (1), V is the input data sample set, W is the feature matrix, H is the projection sparse matrix; Vij Represents the element in row i, column j of V.

[0039] Initialize the feat...

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Abstract

The invention discloses a sparse limited non-negative matrix decomposition algorithm based ultrafiltration membrane water treatment prediction method. Firstly, a sparse limited non-negative matrix decomposition algorithm is utilized to construct a prediction model for a membrane distillation wastewater treatment process; secondly, a GA algorithm is utilized to optimize parameters of the prediction model in a pseudo-steady state and a non-steady state respectively; thirdly, the optimized prediction model is utilized to predict the change trend of the membrane flux and the membrane pollution resistance and to analyze the influence of basic operation parameters of membrane distillation on the membrane flux and the membrane pollution resistance in the pseudo-steady state and the non-steady state respectively; and finally, a prediction result is subjected to sensitivity analysis calculation to determine leading factors which influence the membrane flux and the membrane pollution resistance. According to the method, the sparse limited non-negative matrix decomposition algorithm is utilized to predict the change situations of the membrane flux and the membrane pollution resistance in real time, and the influence of the basic operation parameters of membrane distillation on the membrane flux and the membrane pollution resistance is clarified and quantified.

Description

technical field [0001] The invention belongs to the field of ultrafiltration membrane technology and sewage and wastewater treatment, and in particular relates to an ultrafiltration membrane water treatment prediction method based on a sparse restricted non-negative matrix decomposition algorithm. Background technique [0002] In recent years, membrane separation technology has developed rapidly, including nanofiltration membranes, ultrafiltration membranes, and reverse osmosis membranes. Their rapid development provides new ways for urban sewage treatment and industrial wastewater treatment. The ultrafiltration membrane screening process is driven by the pressure difference on both sides of the membrane, and the ultrafiltration membrane is used as the filter medium. The pores only allow water and small molecular substances to pass through and become the permeate, while the substances in the original solution that are larger than the micropore diameter of the membrane surfac...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G06N3/12
Inventor 陈琳刘畅朱亮靳斌斌
Owner HOHAI UNIV
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