通过对一类相当复杂的变分方程问题的研究并利用其有关结论，我们证明了新模型最佳控制的存在性并刻划出其结构。
From studying some kind of quite complex variational equation problems and applying the conclusion, we prove that the optimal control of new model is existent and characterize its structure.
探讨了不同变量组合的各方程的相关性，证明三元组合为最佳；
The study on the correlativity among equations of different variable combinations suggests that ternary combination is the optimal one.
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