查询词典 amplitude contraction

Variation of the amplitude of a carrier wave in correspondence to fluctuations in the audio or video signal being transmitted.

一个载波的幅度随着发送的声频或视频信号的涨落而变化。

The most important of the most commonly used analog modulation is the sine wave as a carrier perspective modulation and amplitude modulation.

最常用最重要的模拟调制方式是用正弦波作为载波的幅度调制和角度调制。

Variation of the amplitude of a carrier wave in correspondence to fluctuation s in the audio or video signal being transmitted.

一个载波的幅度随着发送的声频或视频信号的涨落而变化。

The effect of plasma densities and plasma collision frequencies on the field amplitude,field phase and reflection coefficient of the cavity is computed and analysed.It is clearly shown that the absorption of plasma to microwave is increase...

数值计算结果表明，在一定的等离子体密度下，随着等离子体碰撞频率的提高，等离子体对微波场的吸收增大，此种开放式的结构可有效地在腔中形成有利于微波等离子体产生的驻波场。

Methods DPOAE were recorded in 112 ears of healthy newborns with CELESTA 503 Cochlear Emission Analyzer. Results The prevalence of DPOAE was 91.3%.When the fo was from 750 to 4 000 Hz,the incidence of detectability was highest and amplitude was stable.

采用耳声发射分析仪Celesta 503对正常新生儿112耳及正常听力成人126耳进行DPOAE听力图测试，Medisoft96统计学分析。

The dips deriving from transformer energizing can be distinguished via ST contour easily, and the dips caused by faults or motor inductions are classified using corrected first central moment and phase angle curve of amplitude envelope vectors from S-matrix.

利用S变换时频等值线图可以容易地识别由变压器激磁引起的电压凹陷；对于由各种故障和感应电机启动引起的凹陷，通过求取S矩阵幅值包络向量的修正一阶中心矩和相位变化曲线实现了分类。

The diffraction theory of Kirchhoff is applied to the four-pinhole aperture diffraction screens, the intensity, the zero-contour of the real and imaginary parts of complex amplitude and the phase distribution in deep Fresnel diffraction region are simulated, and it is found that the bright spots in interference field show central symmetry distribution. When the observation plane close to the diffraction screen, the zero-value points of light intensity can form line segment, on which the eccentricities of the light intensity isoline are close or equal to 1, the intensity changes very fast on both sides of the zero-line of light intensity.

利用基尔霍夫衍射理论计算了四圆孔径衍射屏在菲涅尔深区形成的的干涉光场的强度、零值线和相位的分布，发现干涉光场亮斑关于中心呈对称分布，在距离衍射屏较近的观察面上，光强值为的零点组成光强零值线段，该线段上光强等值线的离心率都接近或等于1，其两侧的光强值变化非常剧烈。

The independent equations of the amplitude spectrum and phase function of orthogonal filter banks were sought through function axial symmetry decomposition and centrosymmetry decomposition technique.

采用函数中心对称和轴对称分解方法分别研究了正交滤波器组间的幅频和相频特性的独立方程。

Then, the characteristic of DMS parameters transmission evolving in dispersion map, which including amplitude, width, chirp and energy of pulse, are studied. With help of the numerical methods, it not only can be validated the results of guiding. center "breathing" soliton transmission theory, but also proved that robustness of DMS in changefully averaged dispersion value line.

结合数值计算方法研究了DMS参量如幅度、脉宽、啁啾以及脉冲能量在色散管理周期内演化特性，该结果传输系统的稳定传输的特性，从而不但验证了导引中心"呼吸"孤子传输理论的结果，而且证明DMS在不同的平均路径色散条件下的鲁棒性。

Scalar network analyzer is a kind of intelligent instrument based on frequency sweep test technology that used to measure the amplitude-frequent cy characteristic of linear system.

标量网络分析仪是一种基于扫频测量技术，用于测量线性系统幅频特性的智能化仪器。

I was up all night because I was in pain, she said.

我整夜，因为我在疼痛，她说。

A crow caws /craoks.

乌鸦叫。 51-论文网