...课作业、群体决策支援、最佳化问题、网际网路 [gap=1120]Keywords：Timetabling, group decision support, optimization problem, internet ...
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使用变分法，推导出这种最佳化问题的必要条件。
Using calculus of variationS, necessary conditions of the optimization problem are developed.
如果您留意这些警告，就可避免许多最佳化问题。
You can avoid many optimization problems if you heed these warnings.
给出了在气冷引线最佳化问题中求解热平衡方程的方法。
The solution of the heat balance equation for gas cooled current leads is presented.
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