Photonic RF phase shifters based on OTTD (optical true time delay), heterodyne mixing technique and vector sum technique were introduced. The principles and features were proposed and analyzed.

介绍了基于光实时延迟线、基于外差混频技术和基于矢量和技术的光子射频移相器，对其工作原理和技术特点作了分析。

youdao

But in sum, now at home and abroad, seismic reduction technique of hybrid control for aseismatic structure is still placed in experiment and theories research stage.

但从总体而言，目前国内外在抗震结构混合控制减震技术方面还处于试验及理论研究阶段。

youdao

It was especially to sum up applied research and practical technique of insect hormone and antihormone in the Chinese sericologica production.

特别对昆虫激素及抗激素类物质在我国蚕业生产中的应用研究与实用化技术做了总结。

youdao

Such an attack is easily sustained if, as the Ehrlichs do, the technique is to sum up a complex view in a sentence and then attack it as parody.

ECONOMIST: Green plus red-tape makes brown