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Fuzzy Hierarchical Fishery Damage Assessment Method Based on Gray Relation

A gray correlation and fuzzy hierarchical technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as the assessment of fishery damage levels of thermal drainage from power plants that have not yet been discovered

Active Publication Date: 2020-11-24
YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there is no introduction to the method of assessing the damage level of fishery by temperature and drainage of power plants. This invention perfects the lack of this research section in history, and has a good reference value for subsequent correlation research.

Method used

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  • Fuzzy Hierarchical Fishery Damage Assessment Method Based on Gray Relation
  • Fuzzy Hierarchical Fishery Damage Assessment Method Based on Gray Relation
  • Fuzzy Hierarchical Fishery Damage Assessment Method Based on Gray Relation

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Embodiment

[0074] figure 1 The process of fishery damage assessment of thermal discharge of power plants is given, and the specific steps are as follows:

[0075] Step 1: Construct the fishery damage assessment index model of power plant thermal drainage.

[0076] Combining literature and expert opinions, this embodiment divides the power plant thermal drainage fishery damage assessment index model into three layers: the first layer is the target layer, the second layer is the criterion layer, and the third layer is the index layer;

[0077] The target layer is the overall damage to the fishery caused by the temperature and drainage of the power plant; the criterion layer includes 2 influencing factors: water environment quality and fishery biological resources loss; the indicator layer is specific to the 2 influencing factors of the criterion layer Described, the water environment quality factors mainly include chemical oxygen demand, pH, dissolved oxygen, temperature, and residual ch...

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Abstract

The invention provides a grey correlation based fuzzy hierarchy estimation method for damages to fishery by thermal discharge of a power plant and belongs to a field of environment protection. The method includes steps of analyzing strong correlation factors of damages to fishery by thermal discharge of the power plant and establishing a fishery damage estimation indicator system; utilizing a grey correlation principle to calculate indicator correlation degree and to further construct a fuzzy relation matrix of fishery damage indicators; employing an improved analytic hierarchy model to obtain fishery damages caused by thermal discharge and weight vectors of the indicators corresponding to the different factors; combining the obtained indicator weight vectors with the fuzzy relation matrix of the fishery damage indicators via blurring operators by using a fuzzy synthesis method and performing comprehensive estimation on fishery damages caused by thermal discharge of the power plant. According to the invention, three mathematic estimation methods including grey correlation, fuzzy mathematics and analytical hierarchy process are combined together organically, so that the three estimation methods complement each other and also enhance the reliability of the estimation of fishery damages caused by thermal discharge of the power plant.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a method for assessing fishery damage caused by temperature and drainage of power plants in fuzzy levels based on gray correlation. [0002] technical background [0003] The nuclear / thermal power plants distributed along the seashore mainly use seawater to cool the generator sets. The seawater that passes through the condensation system heats up rapidly and is discharged into the sea again. The temperature of the seawater discharged into the sea is higher than the original temperature of the surrounding water body. This phenomenon Called warm drainage discharge. Temperature rise and residual chlorine in warm drainage are the two factors that have the greatest impact on the surrounding sea environment, and usually cause lethal or sub-lethal effects on fish. [0004] The invention is a method for evaluating fishery damage caused by thermal discharge of power pla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/02
CPCG06Q10/06393G06Q50/02
Inventor 崔正国曲克明陈碧鹃陈聚法赵俊
Owner YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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