查询词典 impedance

Constant value of vena contracta coefficient has been employed in the well-used quasi-steady models for computing the nonlinear acoustic impedance of the orifice. However, this nonrealistic assumption degrades the accuracy of the theoretical models.

常用的小孔声学非线性效应的准定常模型采用不随声强变化的vena收缩系数，这种不合实际的假设影响了非线性声阻的计算精度。

In this thesis, the problems of impedance matching are studied based on the theory of nonreciprocal transmission lines, the broadband matching methods of nonreciprocal transmission lines are put forward.

本文在非互易传输线理论的基础上，对非互易传输线的阻抗匹配问题进行了研究，提出了非互易传输线宽带匹配的方法。

First, the related concepts about theory of nonreciprocal transmission lines are introduced, including the nonreciprocal transmission line equations, the characteristic parameters and some important parameters, which can lay a theoretical foundation for impedance matching.

首先介绍了非互易传输线理论的相关概念，包括非互易传输线方程，特性参数、重要参量等，为阻抗匹配问题的研究打下理论基础。

Through the comparison, we use traveling-wave method to measure dispersion and nonresonant perturbation method to measure interaction impedance.

测量系统采用虚拟仪器的设计思想，由测量平台、伺服电机、矢量网络分析仪、计算机等硬件组成，用LabView完成了系统软件设计。

The dispersion and interaction impedance of two kinds of helical slowwave structure with vane-loaded are measured by using nonresonant perturbation method in 4～18 GHz with Aglient 8510C vector network analyzer.

螺旋线行波管由于其具有高功率、高增益、高效率和宽频带的特点，在电子对抗和通讯等领域具有广泛的应用。

Development of a 100 kV low impedance and nonuniformly lumped parameter Blumlein PFN.

kV低阻抗非均匀集中参数Blumlein脉冲形成网络的研制。

The NOVO seems to be less affected by impedance, and handles them all well.

NOVO的表现不太受阻抗的影响，高低阻都能应付好。

Purpose To study the significance of measuring the respiratory impedance in bronchial asthma patients by impulse oscillometry method.

目的探讨脉冲振荡技术法测定支气管哮喘患者呼吸阻抗的价值。

Objective: To measure the variation and significance of respiratory impedance and pulmonary ventilation function in patients with bronchial asthma by impulse oscillometry before or after the bronchial provocation test, investigate the relationship between the IOS method and bronchial provocation test, and evaluate the clinical significance in bronchial asthma by IOS method.

目的：应用脉冲振荡法测定支气管哮喘患者在支气管激发试验前后的呼吸阻抗及肺通气功能参数的变化规律和临床意义，探讨IOS测定方法能否作为支气管激发试验的判断方法以及IOS测定参数在哮喘诊断中的价值。

Impulse oscillometry ; bronchial asthma ; respiratory impedance

脉冲振荡技术；支气管哮喘；呼吸阻抗

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。