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。
This method can characterize the deposit gyration of thin interbeds and explore local structure of thin interbeds.
该方法既能刻画薄互层的沉积旋回，同时也能用于研究薄互层内部的局部结构。
TEM and XRD were used to characterize the microstructure and crystal structure of carbon spheres.
采用TEM和XRD对碳球的微观结构和晶体结构进行表征。
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