查询词典 impedance

The Airy function is used to calculate the plasma impedance and the grill-plasma scattering matrix is deduced, then the coupling properties of the HT-7 LHCD MJ launcher are studied with the antenna scattering matrix and the grill-plasma scattering matrix based on the liner coupling theory. The average power reflection coefficient, directivity, power spectrum are obtained for different edge plasma densities and for different phasings between main waveguides.

采用线型耦合理论，用艾黎函数计算了等离子体阻抗，推导出常规波导阵对等离子体的散射矩阵，并利用它和天线自身的散射矩阵研究了HT-7装置低杂波多结波导阵天线的耦合特性；计算了其平均功率反射系数、方向性系数和功率谱与等离子体边缘密度和主波导相位差等参数的关系。

However, due to the load, grid parameters and system operation are continuous alterative, the methods which based on element parameters and harmonic impedance calculation is still not mature enough.

但是由于负荷、电网参数以及系统运行的不断变化，基于系统元件参数的谐波阻抗计算方法仍然不太成熟。

Electrochemical impedance spectroscopy was used to investigate the electrical response of the cells under excitation with an alternating current voltage source was measured and analyzed in a wide frequency range (10 mHz-100kHz).

因为目前所使用的染料和电解液都是针对二氧化钛所开发的，虽然氧化锌具有比二氧化钛更有好的光电性质，但目前氧化锌染料敏化太阳能电池的转换效率仍无法超越二氧化钛。

Irrespective of their impedance headphones and loudspeakers can have very different efficiencies which means that the electrical signal is converted more or less effectively to acoustic anergy.

如果不考虑喇叭和耳机的阻抗的话，在效率上将会有非常大的差别，就是说：相同的电信号有可能转换成更多或更少的声能。

Under the given condition of acoustic driver, the acoustic field including oscillating pressure, volume flow rate and acoustic impedance in resonator was theoretically reconstructed by using the two-microphone method. The experiment results validate that this method is applicable and accurate for the positions with non pressure antinode and node in resonator. The maximum errors near antinode and node area are up to 12.4%.

在给定双声源条件下，采用双传感器法对该系统谐振管中的声场参数（包括声压、质点速度、当地声阻抗等）分布进行理论声场重构，并通过实验分析，证实了该方法在等径谐振管内非声压腹点和节点处的适用性和准确性，而在声压腹点和节点处的误差最大达到12.4%。

At present, more than 200 employees, has production capacity of laminates 30, 1:13 aperture ratio to achieve the highest and second-order with the production of HDI technology; and thick, thick copper, mix board, the board high-frequency, high TG board , High-precision impedance board has a wealth of experience in production.

目前公司员工200余人，已具备生产30层板的能力，孔径比最高做到1：13，并具备生产HDI二阶技术；并对厚板、厚铜板、混压板、高频板、高TG板、高精度阻抗板有丰富的生产经验。

But the direction of out-of-step central location can't be judged only by the voltage magnitude or the magnitude of apparent impedance that reflected voltage magnitude.There's strong coupling between reactive power and voltage.

对等值两机系统，落在失步机群之间电气连线上的失步中心是在一次失步振荡周期中失步断面联络线上出现电压最低值的点。

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。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。