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Multi-target railway logistics center function area layout method based on exponential normalization

A technology of logistics center and layout method, applied in the direction of gene model, data processing application, instrument, etc., can solve the problem of inability to guarantee synchronization reduction, etc., and achieve the effect of feasibility guarantee

Inactive Publication Date: 2019-06-21
XUZHOU NORMAL UNIVERSITY
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Problems solved by technology

When the Manhattan distance is the largest (d ij = d max ), corresponding to the minimum adjacency (b ij =0), when the Manhattan distance is the smallest (d ij =0), it corresponds to the maximum adjacency (b ij = 1), that is to say, it is impossible to have d at the same time ij = d max and b ij = 1, so it cannot be obtained at the same time and there is no guarantee and Synchronous reduction of

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  • Multi-target railway logistics center function area layout method based on exponential normalization
  • Multi-target railway logistics center function area layout method based on exponential normalization
  • Multi-target railway logistics center function area layout method based on exponential normalization

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[0069] Such as figure 1 As shown, a kind of multi-objective railway logistics center functional area layout method based on exponential normalization of the present invention comprises the following steps:

[0070] Step A: Use the differential evolution algorithm to update M solutions, and each solution corresponds to a multi-objective railway logistics center functional area layout scheme. Here, it is stipulated that each solution is represented by a row vector X=(x 1 ,...,x n ,x n+1 ,...,x 2n ,x 2n+1 ,...,x 3n ) form, the number of variables in the solution is N=3n, and n is the number of functional areas. x i (i=1,2,...,n) is a 0-1 variable, x i =1 means that the i-th functional area is placed horizontally, xi =0 means that the i-th functional area is placed vertically, and x i (i=n+1,n+2,...,2n) is a real number variable, representing the abscissa of the i-th functional area, x i (i=2n+1,2n+2,...,3n) is a real number variable, representing the ordinate of the i-t...

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Abstract

A multi-target railway logistics center function area layout method based on exponential normalization comprises the steps that A, generatingM solutions and corresponding each solution to a multi-target railway logistics center function area layout scheme; B, adjusting the solution according to the fixed constraint, the functional region boundary constraint and the logistics center entrance and exit constraint; C, performing exponential conversion and normalization on the material carrying cost and the comprehensive relation of the solution before and after updating, constructing a penalty function by combining the normalized objective function and the minimum distance constraint violation quantity, and reserving the solution with a lower penalty function value before and after updating; and D, if the current updating frequency reaches a preset value, selecting a solution with a minimum penalty function value as an optimal scheme, and if not, repeating the steps A to C. Through the exponential normalization method, the problem that in the multi-objective optimization process, the material carrying cost and the comprehensive mutual relation between functional areas of the railway logistics center are difficult to balance is successfully solved, and the operation efficiency of the railway logistics center is improved.

Description

technical field [0001] The invention relates to a layout method for a functional area of ​​a railway logistics center, in particular to a multi-objective layout method for a functional area of ​​a railway logistics center based on exponential normalization. Background technique [0002] The railway logistics center is a logistics center that is adjacent to the railway freight station and relies on railway transportation. The center takes various logistics activities in the process of railway transportation as its main work, such as the carriage, distribution, storage, transportation and delivery of goods, and provides basic functions, value-added functions and auxiliary functions according to actual needs. The basic functional area of ​​the railway logistics center includes the tally area, circulation processing area and storage area, the value-added functional area includes the transaction display area, truck parking lot and office service area, and the auxiliary functional...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/30G06N3/12
Inventor 邹德旋
Owner XUZHOU NORMAL UNIVERSITY
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