查询词典 impedance

A novel V-shaped slot antenna with a small right-angle triangle of supplementary slot is presented. The slot clement is fed by an arrow-shaped terminal of a microstrip line printed on the other side of substrate, and its good impedance matching is achieved by adjusting the area of this triangular supplementary slot.

提出了一种新颖的V形微带缝隙天线，地板上开一个直角V形缝隙，在V形缝隙的顶角处附加一个小直角三角形补偿隙，通过改变三角形补偿隙面积的大小可以对天线阻抗匹配进行优化，由基片另一侧的箭形微带线终端对缝隙单元馈电。

The results of numerical modeling indicate that the thin film microstrip lines with finite ground width have good broad band characteristics and the characteristic impedance, attenuation constant and effective dielectric constant have small change with the finite ground width changing.

作者用该程序对有限接地面薄膜微带线进行了时域仿真，结果显示在保证传输模不受干扰的情况下，在较宽频带范围内有限接地面对微带特性有微弱影响。

The rules of the cold-test characteristics changing with helix pitch are also studied and it turns out that, with increasing helix pitch, the phase velocity increases linearly, the interaction impedance changes nonlinearly and the attenuation constant decreases nonlinearly. At the same time, with the limitation of the synchronism between the electron beam and the electromagnetic wave, the change of pitch is small and therefore an approximate linear relation can be introduced.

研究表明：相速几乎随螺距增大而线性变大，互作用阻抗与螺距是非线性的关系，衰减常数随螺距增大而非线性地减小；由于在维持电子注与电磁波速度同步的限制下，螺距变化的幅度不可能很大，因此可近似按线性关系来处理互作用阻抗及衰减常数与螺距之间的关系。

Methods: Audition, acoustic impedance and pure tone audiometer were measured in 32 cases after adenoidectomy.

对32例行腺样体切除后患儿进行听力、声阻抗、纯音测听方面的检查。

Methods: Audition, acoustic impedance and pure tone audiometer were measured in 32 cases after adenoidectomy. Results: Twenty??

对32例行腺样体切除后患儿进行听力、声阻抗、纯音测听方面的检查。

Audiometer:Pure Tone Audiometer, Impedance Audiometer

听力计：纯音听力计、阻抗听力计

Results:Of the 40 patients enrolled in this study, 79 patients were analyzed with impedance audiometry.

结果：79耳符合声阻抗分析条件。

Methods 166 high-risk newborns were tested with DPOAE. Those who failed in DPOAE were tested with Impedance Audiometry immediately.

对166例高危新生儿在出生后进行畸变产物耳声发射检查，未通过的新生儿立即行声阻抗测试。

All patients underwent hearing tests including pure tone audiometry and impedance audiometry before and after RT.

所有病例放疗前后均经耳部检查，电测听及声阻抗测听，放疗后随访时间为6~24个月。

The aim of this dissertation is to develop a measure system of dispersion and interaction impedance, which has high measure precision and automatism.

因此，研制出一套高度自动化、具有较高测量精度的冷参量在线测量系统就成为行波管科研生产单位的迫切需求，这也是本论文的工作目标。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了