查询词典 spectrum

After deriving the equatio ns of reflectan ce spectrum of compressional and shear waves for thin beds at an arbitrary incid ence angle , the equations of reflectance spectrum of compressional wave for a thin be d are reduced at zero incidence angle .

通过采用实际地震子波为输入子波，对单个楔状体薄层、互层组楔状体地质模型进行了纵波合成记录制作。

The familiar spectrum that exists in nature is the rainbow: the white sunlight can be shown to have a spectrum of a continuous range of colors from the short to high frequency.

彩虹是自然界中最为人所熟悉的光谱：太阳的白光可视为由低到高频率的连续光谱。

A directional spectrum of the reflection coefficients is suggested and an empirical formula of the directional spectrum of the reflection coefficients for slope breakwaters are given by the model tests.

通过分析研究，提出了波浪场反射系数方向谱的概念，并由模型试验结果给出了斜坡堤前反射系数方向谱的经验公式。

The time-history velocity response signal of pile can be decomposed by Sym wavelet. The power spectrum value can be extracted from some specified spectrum range. These values from one signal makes up the characteristic vector representing this signal. The relationship between characteristic vector of pile and pile defect type can he established by using BP artificial neural network. Abundant time-history velocity response signals of pile can be acquired by numerical simulation method.

利用Sym小波对基桩速度响应时程曲线进行小波分解，对指定频带上的信号分量进行特征值提取，提取的特征值为反映各频带范围内体现能量分布的功率谱均值，提取的特征值可构成反映信号特征的特征向量，同时利用BP人工神经网络的非线性映射特性建立特征向量和基桩缺陷类别之间的一种对应关系。

At the same time, we studied the influence of quantum interference on the squeezing spectrum of the resonance fluorescence emitted from a V-type three-level atom and a -type four-level atom which are driven by coherent fields. We showed that quantum interference can greatly enhance squeezing in the components of phase quadratures at atomic frequency and change the squeezing spectrum .

同时，我们还研究了量子干涉对V型三能级和型四能级原子共振荧光压缩谱的影响，结果表明，量子干涉可显著加强原子跃迁频率分量的相位压缩效应和改变压缩谱的形状。

The emission spectrum a harmonically trapped two-level atom driven by a single mode standing-wave field with small Lamb-Dicke parameter is investigated, we discuss the effects of the atomic c.m. motion on the emission spectrum.

本文研究了在Lamb-Dicke参数较小的情况下单模驻波光场驱动的俘获二能级原子发射谱，讨论了原子质心运动对原子发射谱的影响。

We show that the atomic c.m motion dont affect the atomic spectrum phase sensitivity when there is no correlation between atomic cm. motion and the field. With the increase of the average energy for atomic cm. motion, the peaks of the emission spectrum move towards each other, their heights change according to the state of the field and atomic motion. While there is correlation between atomic c.m.

当原子质心运动与光场无关联时，原子质心运动不影响原子发射谱对原子偶极矩和光场相对相位的敏感性，随着原子质心运动平均能量的增加，原子发射谱峰间的相对距离变小，峰高的变化与原子质心运动和光场所处的状态有关。

The association between asthma and broad-spectrum antibiotic use was statistically significant; the association with narrow-spectrum antibiotics was not.

哮喘和广谱抗生素的应用的关系有这显著的统计学差异；但窄谱抗生素去没有关系。

In order to study the spilt spectrum of Zeeman effect experiment, the method for the spilt spectrum line of Hg(546. 1 nm) in magnetic field is analyzed based on quantum theory analysis and CCD image disposal.

为了研究塞曼效应的谱线分裂情况，用量子理论和CCD图像相结合的方法分析了Hg(546.1 nm)谱线在外磁场中的分裂。

About the light, I would talk about the colour spectrum, and I remember looking at a Monet painting The Cliffs of Deauville, and he had obviously painted the light up from the rain at the cliffs of Deauville, so what you looked at was rain in an impressionistic way falling over the cliffs, which took you right through the colour spectrum.

关于光，我想谈论一些关于光谱的问题，我记得看过莫奈《杜维尔的悬崖》这幅画，很明显他把悬崖上雨水反射的光线描绘了出来，所以你看到的是雨水以一种印象派的方式流下悬崖，这种方式令观者感受到光的变幻。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"