... 闭项 closed term 对乘积闭合 closed under product 对集合闭包闭合 closed under set closure ...
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Secondly, under the certain assumption, the closed form solution of the product is obtained.
其次在一定假设下，对产品进行定价，获得定价闭合解；
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This research on closed-loop supply-chain under the final product price fluctuations with robust optimization is divided into three parts.
本文对最终产品价格波动下闭环供应链的鲁棒研究共有三个部分。
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