品质因数

This thesis has been discussed the Integrated Passive Devices including the capacitor and the inductor characteristics, as well as one of their variables such as the circle number, the width, the space, the radius and the capacitor area has been changed to investigate their scattering parameter, inductance, capacitance and Q-factor.

本论文内容主要是讨论整合式被动元件中的电感与电容之特性，并试著改变单一变因如圈数、线宽、线距、半径、及电容面积，并分别讨论其反射系数、电感值、电容值及品质因数。

The on-line density measurement technology with microwave has been narrated as a key part. We has deduced relations between permittivity、the load Q-factor and resonant frequency. And the electromagnetic field for closed cavity 、open cavity has been analyzed. we also discuss the design of cavity that is used in experiment、means for how to stir electromagnetic wave and choice of diameter/length ratio for cavity.

接着重点说明了微波在线密度测量原理，基于麦克斯韦方程组深入推导了微扰情况下介电常数与谐振频率，有载品质因数的关系；分别讨论了封闭谐振腔和开孔谐振腔中的电磁场以及微扰方法中所使用的谐振腔的设计及设计中激励方式、腔长/半径的选择等若干关键问题。

Quality factor is one of the important parameter of resonant circuits.

0引言谐振电路中一个非常重要的参数就是品质因数Q。

The assembly of tuning fork and optical fiber probe is used to perform the shear force distance control.

粘接音叉和光纤探针的胶粘剂对由石英音叉和光纤探针构成剪切力控距体系的品质因数有明显的影响。

The calls of non-passerine are some kinds of monotonous dull vocalizations with the characteristics of low and deep frequency, single syllable, low basic frequency and with no ability of modulation in frequency and amplitude. Most of the calls are monotonous and low quality mainly based on the basic song. Compare the vocal of sub-oscine passerine with non-passerine, they have some similar aspects, but the former possesses of stronger capability of vocal control.

非鸣禽的叫声低沉而单调，音节种类单一，基本音频率低，缺乏频率调制以及幅度调制的能力，叫声的品质因数很低，不悦耳，大多为以基本音为主的单音调低音品叫声，亚鸣禽的叫声与非鸣禽近似，但在控声能力方面又有所提高。

A computing model was constructed by using ANSYS on personal compeers to study the RF resonant frequency and quality factor. The influence of the tuning capacitor gap,the cavity mesh and the model construction method were also discussed.

以PC机为平台，采用ANSYS软件进行建模，对腔体的谐振频率、空载品质因数进行了研究，探讨了微调电容间距、网格剖分精度以及建模方法对计算结果的影响。

The transfer function of the LLC resonant converter can be obtained by using the circuit impedance, ratio of resonant inductance, and quality factor.

其后级之半桥LLC谐振式转换器藉由推导电路阻抗、谐振电感比例值与品质因数得到转移函数，以及利用适当的谐振电路的设计与切换频率的调变的方式达到输出电压稳定，并且令功率开关具有零电压切换之功用，以降低功率开关的切换损失。

Magnetic cores with high quality factor and good inductance charicteristic vs frequency were obtained and a series of cores with respective properties can be prepared by changing the proportion of two powders.

通过混合可以得到品质因数较高、电感频率特性较好的复合磁粉芯，并且随着混合比例的变化，可以获得一系列具有连续磁性能的磁粉芯。

Therefore , the quality factor , the inductance in unit area and the current handling capability of the series parallel inductors were observably improved without extra technology .

多点并联结构有效地增加了等效金属层的厚度，串联结构增加了线圈之间的互感值，从而可以在不增加额外工艺成本的条件下显著提高平面电感的品质因数，单位面积电感值和电感线圈的电流承受能力。

It is composed of six parts: PCI Bus interface module, signal generator, signal adjustor, gain and phase detector, A/D conversion module and control and data process module. The system can measure the gain and phase curves of the crystal with the frequency range from 1MHz to 150 MHz. Crystal parameters can also be calculated, such as resonant frequency, series resistance, shunt capacitance, motion capacitance, motion inductance and Q factor, etc.

该测试卡以 IEC 444 标准为测量原理，由 PCI 总线接口模块、信号发生器、信号调理模块、增益相位检测电路、A/D 转换模块等部分组成，能够有效测量 1MHz～150 MHz 频率范围的晶振的增益与相位特性、串并联谐振频率、等效电阻、动态电容、动态电感、品质因数和负载频率等主要电参数。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。