Directivity of uniformly excited , equally spaced linear arrays .

均匀激励等间隔线性阵列天线之指向性。

This dissertation presents the research and applications of microstrip coupler with high directivity .

本论文主要在研究高指向性微带结构及其应用。

There are some problems in the scholarship system , such as great disparity , strong group directivity , the defects of national scholarship policy .

奖学金制度存在着差别较大、群体指向性强和国家级奖学金政策缺陷等问题。

The waveguide shape of the tweeter and sound axis control guarantee wide directivity , so you pick up the high-quality sounds wherever you are positioned .

高音喇叭和声音控制保证轴形波导宽指向性，所以你拿起高质量无论身处何地定位声音。

The establishment question situation , can spiritedly cause the classroom , the knowledge simple to be easy to understand , its intense practice directivity is extremely obvious .

创设问题的情境,能使课堂生动活泼、知识浅显易懂,其强烈的实践指向性是极其明显的。