The later is a nonlinear multiobjective programming, and it is called B Transportation Problem.

后者是一类非线性多目标规划问题，我们把它称为B运输问题。

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B-transportation problem is to minimize total transportation cost subject to that all of the goods should be transported from each source to each destination as quickly as possible.

运输问题是研究在保证货物尽快运抵目的地的前提下使总运费最少的运输问题。

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