查询词典 spectral

Firstly, a generalized spectral dyadic Green's function formulation of multidielectric-layer structures is derived with three dimension sources, which is a set of closed form formulas, and is different from available iterative expressions for two dimension source.

论文从理论和实验上系统地研究了多介质层单频和双频微带天线，推导出新的理论计算公式，提出有效的数值计算方法，研制出新型式的双频微带天线，得。。。

Moreover, we introduce an auxiliary operator, and then by means of its spectral properties and theory of perturbations of bounded linear operators to prove that there is a sequence of generalized eigenvector system which forms a Riesz basis for Hilbert state space.

通过引入一个辅助算子，利用它的谱性质以及有界线性算子的扰动理论，得到系统的广义本征向量的完整性以及Riesz基性质。

First, each shape is represented by the eigenvectors of an appropriately defined affinity matrix based on approximated geodesic distance, forming a spectral embedding which achieves normalization against rigid-body transformations, uniform scaling, and shape articulation (i.e., pose changing). This procedure is called the pose-oblivious transform.

首先，针对每一个形状都基于谱嵌入的方法求得其相应的谱嵌入表示，这里的谱嵌入是基于以近似测地距离为基础构造出的仿射矩阵的特征向量得到的，这一过程称为姿态无关变换，经过这一变换，模型的形状的描述符就具备了刚体变换不变、均匀缩放不变和姿态无关的特性。

The general formulae are constructed for studing the geometric anisoplanatism of an adaptive optics by the transverse spectral filtering method.

利用横向谱滤波方法给出了研究自适应光学几何非等晕性的一般关系式。

This paper proposes a cluster analysis approach based on geometric probability, which determines the classification number directly according to the distributive characteristics of pixels in the spectral space by utilizing geometric probability and gradually generates the hierarchical classification system beginning at the top level.

本文提出基于几何概率的聚类分析方法，该方法运用几何概率直接根据像元在灰度空间中的分布特征决定分类数，按照先分大类、后分小类、逐层细分的顺序确定分类方案。

In the text, the Spectral element method is used to model the seismic wave propagation, which is based on a weak formulation of the elastic mechanics equation. It combines the geometrical flexibility of the Finite element method and the accuracy of the pseudospectral method.

本文采用谱元法对横向同性介质中的地震波进行模拟，该方法基于弹性力学方程弱形式基础之上，具有有限元适应任意复杂介质模型的韧性和伪谱法的精度。

We got the regression models of GHI and visible light/infrared light,based on the PCs correlated to plot spectral reflection and GHI,which indicate community gross and grazing degradation.

3表征群落总量、放牧退化的主成分和GHI与植被光谱反射值有相当的相关性，由此得到GHI与可见光、红外光因子的回归模型。

These systems make use of ultra-short duration pulses which yield a bandwidth on the order of gigahertz signals characterized by extremely low power spectral densities.

超宽带系统利用极短的脉冲(＜1ns)来产生GHz级的带宽和十分低的功率谱密度。

Numerical weather forecasts Global spectral model Distributed and shared memory parallelization Global analysis and assimilation

数值天气预报；全球谱模式；分布共享并行；全球分析同化

The fluorescence spectra for whole blood,erythrocyte and hemoglobin from healthy and fresh experimental mice under the wavelength of 407nm (Δλ 1/2≈18nm) excitation are measured by a grating spectrometer,and their emitting mechanism and spectral characteristic are investigated.

引 言利用光诱导产生的荧光光谱了解生物大分子的结构或诊断生物组织病变已经盛行很多年了，在临床上荧光显微镜和血细胞计数器等仪器已经成了检查人的身体健康状况的基本工具。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷