提出了一种新的基于有理二次样条曲线的图像放大方法。
In this paper, a new method which based on the curves of rational quadratic splines was presented to enlarge images.
研究了一体化二次变频收发信机中各种组合频率干扰的产生原因：主要是由于混频器和放大器的非线性。
This paper investigates various combined frequency interference in integrated and double-converted transceivers, and points out that the reason is the non-linearity of frequency mixer and amplifier.
借助于高放大倍率的二次复型组织，观察了LF6铝合金超塑变形后的表面晶粒组织。
With the secondary duplicated model structure with high magnification, the surface grain structure of LF6 aluminum alloy superplastically deformed is observed.
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