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Locating method of pollution source close to lake shore side

A positioning method and pollution source technology, which is applied in the field of pollution source positioning, can solve problems such as low work efficiency, long time consumption, and large data storage

Inactive Publication Date: 2014-08-06
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the measured value of the historical moment and the measured value of the current moment to participate in the least square numerical calculation at each measurement moment. However, as the number of measurements increases, the amount of data will increase sharply, and there will be repetition and complexity at different measurement moments. The least square numerical calculation of the method, so this method has a large amount of data storage, low work efficiency and long time consumption

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  • Locating method of pollution source close to lake shore side
  • Locating method of pollution source close to lake shore side
  • Locating method of pollution source close to lake shore side

Examples

Experimental program
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Embodiment 1

[0096] A method of locating pollution sources close to the shore of a lake. The concrete steps of this method are:

[0097] Step 1. Set up a Cartesian coordinate system on the horizontal plane with the shore as the vertical axis and perpendicular to the shore as the horizontal axis. Assuming that the pollution source releases pollutants continuously from time τ at (α, β), the mass flow rate of the pollution source is Q, and the abscissa of the pollution source α, the vertical coordinate of the pollution source β, the initial diffusion time τ of the pollution source and the mass flow rate of the pollution source Q is the unknown quantity to form the vector X to be sought, and the vector to be sought X=(α,β,τ,Q) T ; The total number of sensor nodes is 8, and the sensor nodes have measured the water body ion concentration at 5 moments in total, and 8 sensor nodes (x i ,y i )(i=1,...,8) at t k (k=1,...,5) See Table 1.1 for the water ion concentration measured at all times.

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Embodiment 2

[0231] A method of locating pollution sources close to the shore of a lake. The concrete steps of this method are:

[0232] Step 1. Set up a Cartesian coordinate system on the horizontal plane with the shore as the vertical axis and perpendicular to the shore as the horizontal axis. Assuming that the pollution source releases pollutants continuously from time τ at (α, β), the mass flow rate of the pollution source is Q, and the abscissa of the pollution source α, the vertical coordinate of the pollution source β, the initial diffusion time τ of the pollution source and the mass flow rate of the pollution source Q is the unknown quantity to form the vector X to be sought, and the vector to be sought X=(α,β,τ,Q) T ; The total number of sensor nodes is 8, and the sensor nodes have measured the water body ion concentration at 9 moments in total, and 8 sensor nodes (x i ,y i )(i=1,...,8) at t k (k=1,...,9) See Table 2.1 for the water ion concentration measured at all times.

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Abstract

The invention relates to a locating method of a pollution source close to a lake shore side. According to the technical scheme, the water body ion concentration z =(x_t,y_t,t_k )(i=1...N) measured by N sensor nodes at the moment tk, the posteriori estimate X k-1=((alpha) (k-1), (beta) (k-1), (tao) (k-1), Q (k-1),)T of a vector X to be solved at the moment tk-1 and the error covariance matrix P (k-1) at the moment of tk-1 are processed through a dynamic data processing module to obtain the posteriori estimate X k=((alpha) (k), (beta) (k), (tao) (k), Q (k),)T of the vector X to be solved at the moment tk and the error covariance matrix P (k) at the moment tk; the posteriori estimate and the error covariance matrix at the moment of T(k+1)are solved, and the dynamic data processing module is called for again until the posteriori estimate X L=((alpha) (L), (beta) (L), (tao) (L), Q (L),)T at the moment TL and the error covariance matrix Q (L),)T at the moment TL are worked out. Thus, (alpha) (L) is the x-coordinate of the pollution source and (beta) (L) is the y-coordinate of the pollution source. The locating method has the advantages of being easy to realize, high in locating precision, high in working efficiency, short in consumed time and the like.

Description

technical field [0001] The invention belongs to the technical field of pollution source positioning. Specifically, the invention relates to a method for locating pollution sources close to the shore of a lake. Background technique [0002] Lakes are an important water source for industrial and agricultural water and drinking water for residents. In recent years, the frequent occurrence of water pollution incidents has aroused widespread concern of human beings, and the pollution of lake water has brought immeasurable losses to society, economy and people's lives. Since the pollution of lake water mainly comes from the coastal discharge of industrial wastewater, waste residue and domestic garbage, the location of pollution sources close to the shore of the lake is of great significance for the protection of water resources. [0003] The existing pollution source location methods near the lake shore include: approximate function method and nonlinear least squares method. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G01N33/18
Inventor 柴利李微杨君
Owner WUHAN UNIV OF SCI & TECH