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Soil moisture characteristic parameter calculating method based on a staging tabu searching algorithm

A soil moisture and optimization algorithm technology, applied in the agricultural field, can solve the problems of poor convergence speed and universality of the taboo algorithm, and achieve the effect of improving soil water utilization rate and improving soil water utilization rate

Inactive Publication Date: 2012-09-26
CHINA AGRI UNIV
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Problems solved by technology

Although the tabu algorithm avoids falling into local optimum by establishing a tabu table, the convergence speed and universality of the basic tabu algorithm are poor.

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  • Soil moisture characteristic parameter calculating method based on a staging tabu searching algorithm
  • Soil moisture characteristic parameter calculating method based on a staging tabu searching algorithm
  • Soil moisture characteristic parameter calculating method based on a staging tabu searching algorithm

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] Optimization algorithms are generally used to solve optimization problems. The so-called optimization problem refers to designing an objective function and selecting parameters so that the objective function reaches the minimum value.

[0026] Optimization algorithms are generally divided into classical optimization algorithms and heuristic optimization algorithms. Among them: the classical optimization algorithm uses a feasible solution as the initial value, and searches for the optimal value according to the determined search strategy. Classical algorithms use local information (such as a single initial point and its derivatives, etc.) for optimization, making i...

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Abstract

The invention provides a soil moisture characteristic parameter calculating method based on a staging tabu searching algorithm. The soil moisture characteristic parameter calculating method comprises the steps of: S1, acquiring soil saturated hydraulic conductivity and saturated moisture content; S2, calculating unsaturated hydraulic conductivity of soil and soil moisture diffusion rate; S3, establishing a one-dimensional soil moisture movement mathematical model; S4, obtaining the theoretical value calculation formula theta (a, b and m) of soil moisture content; S5, determining practical measured value theta of the soil moisture content; S6, optimizing according to theta (a, b and m) in the S4 and S5 and improved staging tabu algorithm, so as to determine the optimal value of a, b and m; and S7, bringing the optimal value in the S6 in the S3 to calculate the soil moisture characteristic parameter. With the method disclosed by the invention, the one-dimensional soil moisture movement rule can be determined under negative pressure sub-irrigation condition, thus instructing and further improving a negative pressure sub-irrigation system, improving the soil moisture utilization rate and further improving the soil moisture rate.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a method for calculating characteristic parameters of soil moisture, in particular to a method for calculating characteristic parameters of soil moisture based on a staged taboo optimization algorithm. Background technique [0002] Soil water movement is a complex process, which is closely related to many factors such as irrigation methods, soil conditions and external environment. Under specific irrigation conditions, the study of soil moisture movement is of great significance for understanding soil moisture distribution, improving irrigation systems, and improving water use efficiency. [0003] In the study of soil moisture movement simulation, usually under specific irrigation conditions, soil composition and external environmental conditions, experimental methods are used to establish empirical formulas to simulate soil moisture movement laws, or existing mature formul...

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Application Information

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IPC IPC(8): G01N33/24
Inventor 冀荣华王枫辰祁力钧李道亮李想
Owner CHINA AGRI UNIV
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