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A method for inversion of earth resistivity measurement data based on simplex firefly method

A technology of geodetic resistance and measurement data, which is applied in the field of inversion of earth resistivity measurement data based on the simplex firefly method, which can solve the problems of enhancing the local search ability of the algorithm and speeding up the convergence speed of the algorithm.

Active Publication Date: 2017-02-15
STATE GRID CORP OF CHINA +3
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Problems solved by technology

[0006] The invention provides a method for inverting earth resistivity measurement data based on the simplex firefly method, which overcomes the problem that the inversion result of the classical optimization method is only a local solution in the initial value range, and makes up for the insufficient local search ability of the artificial firefly algorithm disadvantages, thereby enhancing the local search ability of the algorithm and speeding up the convergence speed of the algorithm

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  • A method for inversion of earth resistivity measurement data based on simplex firefly method
  • A method for inversion of earth resistivity measurement data based on simplex firefly method
  • A method for inversion of earth resistivity measurement data based on simplex firefly method

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[0032] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0033] The invention provides a method for inverting earth resistivity measurement data based on the simplex firefly method, comprising the following steps:

[0034] Step 1: Assuming that there are p (p=20n-20 recommended) fireflies in the 2n-1 dimensional search space of n-level horizontal multi-layer soil inversion, where n is a natural number greater than or equal to 2, for each individual firefly Initialize first, that is, randomly specify the position of fireflies, and specify the luciferin value of each firefly as a constant l 0 .

[0035] Step 2: Use the formula (1) to get the position Θ of the i-th firefly in the t-th iteration i (t) corresponding objective function value f RMS-error (Θ i (t)) converted to fluorescein values;

[0036] l i (t)=(1-η)l i (t-1)+γf RMS-error (Θ i (t)) (1)

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Abstract

The invention provides an algorithm for inverting earth resistivity measurement data on the basis of a simplex firefly algorithm. The algorithm comprises the steps that first, the position and luciferin value of each firefly individual are initialized; second, the luciferin value of each firefly individual is updated; third, neighborhoods of the firefly individuals are divided; fourth, the probability of the i-th firefly moving towards the j-th firefly in a neighbor set is determined; fifth, the firefly individual j is selected through a roulette method, and the i-th firefly is moved to update the positions of the fireflies; sixth, optimal fireflies in N neighbors conduct simplex local search according to a fluctuation range of a search radius with current positions as centers; seventh, if an objective function value of soil inverting is already smaller than a set error, a result is output directly, and if not, the second step is executed again to update the luciferin values after the optimal fireflies conduct the simplex local search. The algorithm can increase local search capability and increase convergence speed.

Description

[0001] technology neighborhood [0002] The invention relates to the technical field of earth resistivity inversion in electric power system, in particular to a method for inverting earth resistivity measurement data based on simplex firefly method. Background technique [0003] At present, the quadrupole method is widely used in the power system as the measurement method of earth resistivity. Since there is no uniform resistivity soil in reality, the apparent resistivity measured by the quadrupole method varies with the pole distance. The process of inferring soil structure parameters from measured apparent resistivity is called inversion. At present, the soil inversion methods of power system mainly include steepest descent method, least square method, BFGS quasi-Newton method and genetic algorithm, and the application of new optimization methods is not yet perfect. [0004] The simplex method belongs to the traditional optimization method, and its basic idea is to compare...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06N3/00
Inventor 阮羚潘卓洪冯天佑童歆杨琪吴边李伟文习山鲁海亮
Owner STATE GRID CORP OF CHINA
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