美 英 un.前后比 英汉 网络释义 un. 1. 前后比
ratio n.[C] 比率,比例 Back ad. 向后,在后;回,回原处;以前 ; n. 背,背部;背后,后面 a. 后面的 vt. 支持 back n. 1. 后部;后面;背面;反面 2. 人体的背部,脊椎骨;动物的脊背 3. 后襟 4. 椅子的靠背;椅背 5.(足球等)后卫. adj. 1. 位置在后的 2. 以前的,过去的 back to back ...
front-to-back ratio 英 [frʌnt tu bæk ˈreɪʃiəʊ] 美 [frʌnt tu bæk ˈreɪʃioʊ]前后比；（定向天线的）方向性比; 方向性比；前后不一致比
front-to-back ratio 英文front-to-back ratio 中文【电】 前后比
1) front to back ratio 方向性比2) front-to-back ratio 方向性比,前后比3) Direction ratio 方向比值4) direction comparison 方向比较 1. A wide area protection algorithm based on direction comparison is proposed. 提出了一种基于方向比较原理的广域继电保护算法。 2. As an example,the ...
The front‐to‐back ratio (FBR) of a compact dual‐polarized antenna is improved for 5G new radio (NR) base‐station applications. A rim made of partially reflective surfaces is introduced to improve the FBR. A meta‐surface and a parasitic element are employed to lower the antenna height....
1) front to back ratio 前后辐射比2) radiological consequence 辐射后果 1. Aimed at a special situation of a research reactor with high power to be constructed in the suburb of a big city,the acceptance criteria on the radiological consequences of severe accidents in China Advanced Research ...
The radiation characteristics of this antenna are very good, with afront-to-backratio >18db and cross polarization level <-18db. 文章介绍了一种中心频率为3GH的微带准八木天线,这种天线的辐射性能非常好,其前后比大于18dB,交叉极化电平小于-18dB,这些性能都已经通过FDTD仿真得到验证。
1.It also describes the working principle and relative acoustics performance of the tri-modal directional transducer, and gives the test results of directivity,transmitting voltage response,fore-and-aft amplitude ratio,efficiency,etc.描述了三模态换能器的工作原理和有关声学性能,给出了指向性、发射电压响...
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