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Underground water organic pollution source inversion method based on hyper-heuristic homotopy algorithm

A homotopy algorithm, groundwater technology, applied in design optimization/simulation, multi-objective optimization, CAD numerical modeling, etc., can solve the problems of lack of understanding and mastery, acquisition, difficulty of key parameters of organic pollutants, etc., to reduce calculation errors , improve computing efficiency, and achieve the effect of accurate simulation and prediction

Pending Publication Date: 2022-07-05
JILIN UNIV
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Problems solved by technology

[0003] However, groundwater is buried in the underground rock-soil medium, and groundwater pollution usually has the characteristics of concealment and discovery lag, resulting in people's lack of understanding and grasp of the status of groundwater pollution sources, and the migration process of organic pollutants in the groundwater system involves Many key parameters are difficult to obtain directly through current measurement methods

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  • Underground water organic pollution source inversion method based on hyper-heuristic homotopy algorithm
  • Underground water organic pollution source inversion method based on hyper-heuristic homotopy algorithm
  • Underground water organic pollution source inversion method based on hyper-heuristic homotopy algorithm

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Embodiment 1

[0148] Example 1: An organically polluted submerged aquifer can be generalized into a homogeneous and isotropic three-dimensional multiphase flow model; there is no natural boundary near the contaminated site, and the boundary is delineated at a position where the impact of pollutant migration can be ignored; Among them, the northeast boundary and southwest boundary are generalized as a type of boundary; the southeast boundary and the northwest boundary are composed of flow surfaces, which are generalized as zero-flux boundaries; the lower part of the calculation simulation area is an aquifer, which can be generalized as zero-flux boundaries. The upper part is the phreatic surface, which is the water exchange boundary. Because the thickness of the aquifer changes slowly along the direction of groundwater flow, it is generalized as an aquifer of equal thickness; the physical and chemical parameters of water and organic pollutant chlorobenzene are shown in Table 1;

[0149] Table...

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Abstract

The invention relates to an underground water organic pollution source inversion method based on a hyper-heuristic-homotopy algorithm, and the method comprises the following steps: building an underground water organic pollution multiphase flow migration numerical model according to observation data, and determining to-be-inverted pollution source characteristics, aquifer parameters and the value range of each variable in the model; preparing a training sample set; training a single machine learning substitution model of the multiphase flow numerical model; establishing a combined intelligent substitution model; establishing a non-linear programming optimization model for pollution source characteristic and aquifer parameter inversion identification, and coupling the integrated learning intelligent substitution model into the non-linear programming optimization model; solving the optimization model by using a hyper-heuristic homotopy algorithm, and carrying out inversion identification on a to-be-solved pollution source characteristic value and a to-be-solved aquifer parameter value; according to the method, the problem of underground water organic pollution source and multiphase flow migration parameter inversion can be solved, and a technical guarantee is provided for accurate simulation and prediction of spatial and temporal distribution of organic pollutants in underground water.

Description

technical field [0001] The invention relates to the technical field of groundwater numerical simulation inverse problems, in particular to a groundwater organic pollution source inversion method based on a hyperheuristic-homotopy algorithm. Background technique [0002] Organic pollutants have the characteristics of low water solubility, high toxicity and high interfacial tension. After entering the groundwater system, they will accumulate and stay at the top or bottom of the aquifer (the location of accumulation depends on the density of the pollutants being less than or greater than that of water). During the process, it is continuously dissolved and released into the water, causing serious and lasting pollution. In the actual remediation process of organic pollution, it is often faced with the difficulties of low pollutant removal rate, long time-consuming remediation process and high remediation cost. Therefore, it is particularly important to formulate a reasonable and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27G06F111/06G06F111/10
CPCG06F30/27G06F2111/10G06F2111/06
Inventor 王宇卞建民孙晓庆
Owner JILIN UNIV
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