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.
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。
Aiming at present problems, the author also studied the hysteresis control system based on voltage vector control and its corresponding scheme.
又针对目前存在的问题，研究了基于电压矢量控制的滞环控制系统及方案，其基本内容如下。
This paper expounds its necessity and puts forward the corresponding countermeasure and shows the problems that should be paid attention to in the control.
本文阐述了工程造价确定和控制的必要性，提出了相应的对策，并指明了工程造价控制中应注意的问题。
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