查询词典 spectral analysis

As important ways for numerical solutions of partial differential equations, spectral methods have been developed rapidly in the past several decades. They not only have been widely applied to numerical simulations in various fields such as physics, mechanics, aerology, oceanics etc, and their theories of numerical analysis also tend to perfect.

作为数值求解的一种手段，谱方法在近几十年得到了蓬勃的发展，它不仅被广泛运用于物理、力学、大气、海洋等领域的数值计算，而且它的数值分析理论也不断地趋于完善。

Based on the analysis mentioned above, arc light sensing was introduced into practical welding process systematically and was improved with spectral method for the first time.

在GTAW过程中，建立了弧光信号同弧长的对应关系。

All these compounds were characterized by azeotrope and elemental analysis, as well as by spectral measurements.

对所制成的衍生物均采用了共沸混合物分析、元素分析和光谱测定等进行了表征。

However, this polynomial regression model suffered from thecolor metameric problem. Herewith, to minimize the metamerism, a model was developed based on the principal component analysis and back-propagation artificial neural network for scanner spectral characterization, which could reconstruct more accurate spectrum in comparison with the related international experimental results.

但是，扫描仪的多项式回归色度特征化模型存在同色异谱问题，因此本文提出了基于主元分析法和神经网络技术实现扫描仪颜色光谱特征化的算法模型，解决了同色异谱的问题，并且获得了比国际上同类研究更高的图像光谱重构精度。

The visible spectrum of Mo in Ti-based alloy was analyzed by a digital spectroscope. Mo 553.31nm and Ti 551.44nm were selected as spectral lines for analysis and comparison. Samples of Ti-based alloys with different Mo contents were analyzed quantitatively. The data indicated that the ratio of intensities between analytical spectrum and comparison spectrum has a positive relationship with the content of Mo.

使用数字化看谱镜对钛合金中钼元素可见光谱进行了分析测定，选用M0553.31nm和Ti551.44nm作为分析谱线和比较谱线，对不同Mo元素含量的钛合金样品进行了定量分析探索，数据显示分析谱线和比较谱线的强度比值与Mo元素含量成正比关系。

The spectral response of the demultiplexer is calculated by using a rigorous coupled wave analysis method.

对修正了相位的光栅，采用严格耦合波分析，计算了光折变全息应用于波分复用的频谱响应。

This method is founded on the frequency domain model of DS-UWB array signals. The spatial spectral function is then derived for analysis.

该方法建立在直接序列超宽带系统阵列信号的频域模型。

The row details in line sequence, the line details in row sequence and the diagonal details in z sequence.resultsthe frequency spectral data and the image texture information were provided with image detection and wavelet analysis of the lymph node enlargements in face and neck, as well as the quantitative data descriptions of the texture of the foci or the normal tissue.

结果通过对面颈部肿大淋巴结的图像测定和小波技术分析，提供了频谱数据及图像的纹理分析信息，获取了病灶区域与正常组织纹理定量的数据描述。

Open Path (line-of –sight) Gas Detection employing electro-optical "spectral finger-print" analysis of the atmosphere uses the Differential Optical Absorption Spectroscopy technique in a unique method.

用于光电一体化的"光谱指纹图"大气分析的开路式气体检测器使用了差分吸收光谱技术这种独家专利技术。

Besides, in the analytic process, it also utilizes power spectral density diagram, time frequency analysis diagram and modal stabilization diagram to assist the reach.

分析过程中并以时间历时图、功率频谱密度图、时谱图及模态稳定图来辅助观察分析。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。