spectrum ['spektrəm]

spectrum的基本解释

n.

光谱, 系列, 范围, (比喻)范围

• They could look at the spectra of the light the moons reflected.
• 他们可以观察月亮反射的光的光谱。

• There is a wide spectrum of opinions on this question.
• 在这个问题上有着各种不同的意见。

spectrum所属的单词分类

Astronomy / 天文 [220]

white giant  ·  visual magnitude  ·  red dwarf  ·  pole star  ·  outer planets  ·  orbital inclination  ·  orbital eccentricity  ·  muttnik  ·  interstellar dust  ·  inner planets

Color / 颜色 [118]

kelly green  ·  celadon  ·  jungle green  ·  burnt umber  ·  shamrock  ·  chartreuse  ·  yellow  ·  wisteria  ·  white  ·  wheat

与spectrum相关的网络例句 [注：此内容来源于网络，仅供参考]

To further understand and correctly master the notion of marginal spectrum in Hibert-huang transform, the linear property of marginal spectrum is demonstrated, an mistake to the notion of marginal spectrum in some documents is pointed out, and a new viewpoint about the essential difference between marginal spectrum and Fourier frequency spectrum is put forward by which the amplitude of Fourier frequency spectrum only represents the probability that a frequency objectively exists in a signal while the amplitude of marginal spectrum decides whether a frequency objectively exists in a signal.

为了深入理解和正确掌握希尔伯特－黄变换（Hilbert-Huang Transform，简称HHT）中的边际讲概念，证明了边际谱的线性性质，指出了文献中对边际谱概念的一种误解，提出了边际普与Fourier频谱之间本质区别的一种的新观点，即Fourier频谱的幅值只能反映频率在信号中实际存在的可能性大小，而边际谱的幅值则能真实反映频率在信号中是否存在。

Aiming at this problem, the concept of the second order power spectrum was proposed based on the characteristic of the amplitude tune with periodical notch spectrum in thin layer and theoretically researched. The corresponding relationship between the thickness of thin layers and the maximum value of second order power spectrum was established. The theoretical criteria and method for the thickness estimation by second order power spectrum were given. The second order power spectrum map is made by the energy relationship between the thickness of thin layers and the second order power spectrum, and the time responding to strong energy on the map is the time of thin layer.

为此，从薄层振幅调谐具有周期性陷频谱特征出发，提出了二阶功率谱的概念，从理论上对薄层的二阶功率谱特征进行了研究，建立了薄层厚度与二阶功率谱极大值之间的对应关系，给出了利用二阶功率谱进行薄层厚度预测的理论依据和方法，即根据薄层厚度和二阶功率谱的能量关系制作二阶功率谱图，图上强能量团对应的时间即为薄层时间厚度。

In the aspect of the study of the application of HHT method, This dissertation has done three part of jobs: first, the Elcentro strong ground motion which is in common use in earhtquake engineering is analyzed by HHT method, getting its amplitude-frequency-time distribution and the comparison between the HHT marginal spectrum and Fourier spectrum is also made; second, the typical nonlinear system defined by the Duffing equation is analyzed by HHT method, getting its numerical value's amplitude-frequency-time distribution and the comparison between the HHT marginal spectrum and Fourier spectrum is also made; third, define the stationary degree of non-stationary signals making use of 3-D time-frequency spectrum and marginal spectrum, the stationary degree curve of Elcentro seismic recording is protracted according to its defining formula, the stationary degree curve of Elcentro seismic recording which change with time is protracted according to similiar definition.

在HHT方法的应用研究方面，本文做了三部分的工作：首先，利用HHT方法分析了地震工程中常用的Elcentro非平稳强震记录，得到了该记录的振幅－频率－时间分布特性，并将得到的边际谱与傅立叶谱做了比较；其次，应用HHT方法分析了典型的非线性系统－Duffing方程，得到了该方程数值解的振幅－频率－时间分布特性，并将得到的边际谱与傅立叶谱做了比较；最后，利用三维时频谱与边际谱定义了非平稳信号的平稳度，并依照其定义式绘制了Elcentro地震波记录的平稳度曲线，依照类似与依赖与频率变化的平稳度定义，初步尝试编程绘制了Elcentro地震波随时间变化的平稳度曲线。

与spectrum相关的网络解释 [注：此内容来源于网络，仅供参考]

Spectrum：光谱

1666 年牛顿证明一束白光可分为一系列不同颜色的可见光,而这一系列的光投影到一个屏幕上出现了一条从紫色到红色的光带. 牛顿导入"光谱"(spectrum)一词来描述这一现象. 牛顿的研究是光谱科学开端的标志.

Spectrum：频谱

"频谱"(Spectrum)是指声音中所含泛音的数量以及 各个泛音在强度上的相对关系. 声音的频谱可以用专门的分析仪器显示出

Spectrum：谱

熟悉线性代数的朋友知道,代数中一个很重要的概念叫做"谱"(Spectrum). 一个矩阵的很多特性和它的谱结构--就是它的特征值和特征向量是密切相关的. 因此,当我们获得一个图的矩阵表达之后,就可以通过研究这个矩阵的谱结构来研究图的特性.

Spectrum：光

经过改良Private Structure电光(Spectrum)系列内衣宣传海报Private Structure全新电光(Spectrum)系列将炎热夏季花俏的烫花与缤纷的色彩配搭统统收敛,早秋第一时间带给你丝丝质朴气息,色彩却依然保留下彩虹光泽.

absorption spectrum：吸收光谱

以波长 为横坐标,吸光度A为纵坐标作图,可得一曲线,即为吸收光谱(absorption spectrum)或称吸收曲线(absorption curve),右图为不同浓度时三(邻二氮菲)合铁(II)配离子的吸收光谱.