1)  grey state decision making model

2)  grey situation decision

1.
In order to avoid the influence of people′s subjective factors and to provide objective evaluation basis to the selection of exploitation technology,this article use the grey situation decision to built multi-objective comprehensive decision matrix,then make decision by calculating the comprehensive effect measure.

2.
The principle of grey situation decision and its applied method in environmental quality assessment were expounded briefly, and the question of the influence on underground water quality in the area of Yujiagou of the leachate of the dumping area of open pitcoal mine of Xinqiu in Fuxin was studied in this paper.

3.
The paper discusses the principle and application of the grey situation decision method to discern the mine shaft water invasion resource.

3)  gray condition decision

4)  grey situation decision-making

1.
89 dtex x 38 mm), using the handle model of multi-objective grey situation decision-making is optimized.

2.
Tactics agent decision-making model is presented in the paper by using grey situation decision-making theory.

5)  gray state strategy

1.
Based on Heilongjiang statistic almanac,with gray theory and statistic analysis methods,it establishes the model of Heilongjiang,with which the best gray state strategy has been got and the farmers’non-agriculture work action has been analyzed.

2.
The basic principle of gray state strategy method and its application in selecting position of engineering of wood transportation by water were discussed in this paper, which can overcome the limitations of traditional methods and get more scientific and reasonable result

6)  Gray situation decision

1.
The universality of gray situation decision is analyzed based on general system theory.

2.
Synthetically considering both sides of characters and the principle of the plan for artillery firepower, this paper probes into the application of gray situation decision theory in optimization.

 灰色模型greymodels   从灰色系统中抽象出来的模型。灰色系统是既含有已知信息，又含有未知信息或非确知信息的系统，这样的系统普遍存在。研究灰色系统的重要内容之一是如何从一个不甚明确的、整体信息不足的系统中抽象并建立起一个模型，该模型能使灰色系统的因素由不明确到明确，由知之甚少发展到知之较多提供研究基础。灰色系统理论是控制论的观点和方法延伸到社会、经济领域的产物，也是自动控制科学与运筹学数学方法相结合的结果。