In this paper, we have discussed the critical output and critical price of grey profit and loss by grey system theory, it is significant to deal with the uncertainly. factors in economic system.

本文利用灰色系统理论，讨论了灰色盈亏平衡的临界产量和临界价格，为处理经济系统中的不确定因素进行了尝试。

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In addition, the system can also forecast the danger state of certain unit by grey prediction theory.

除此之外，本系统还可以用灰预测理论对某一单元的危险状态进行预测。

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On the basis of log geology evaluation and norm, combining with the log data, the method to evaluate oil gas reservoirs exactly is presented by using grey system theory.

本文利用测井资料，依据测井地质评价油气储层的分析准则，提出灰色理论精细评价油气储层的处理方法和解释系统。

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