基于开世界假设，提出了一个通用的不确定性推理和决策框架。
Based on the assumption of open world, a general framework of reasoning and decision-making with uncertainty is given.
但公允价值因与经济环境联系紧密，涉及诸多假设和不确定性等原因，在理论研究和实务应用中难度极大。
But fair value is close to the economic environment, which involves many reasons such as hypotheses and uncertainty etc, has many difficulties in study in the theory applied with practice.
假设的不确定性和外部干扰的上界是未知的。
The upper bounds of the uncertainties and external disturbances are assumed to be unknown.
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