可信性理论是研究模糊现象的一个数学分支。

Credibility theory is a branch of mathematics for studying the behavior of fuzzy phenomena.

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目前，许多理论界和应用界的学者都致力于研究可信性理论。

Presently, many scholars who study theory or application commit themselves into the research of credibility theory.

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基于可信性理论和两阶段模糊优化方法，提出一类新的模糊生产计划模型。

Based on credibility theory and two-stage fuzzy optimization method, this paper presents a new class of fuzzy production planning model.

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