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Through detailed calculation and analysis of the dispersion characteristic of the noble metals like Au and Ag, we found that the group velocity combined with the group refractive index can change from negative to positive with increase of the photons energy in the visible Drude region and has the spectral property which is in agreement with the experimental results obtained in this work.

通过对贵金属Au和Ag的光学常数的色散特性分析和数值计算，发现在可见光的Drude光谱区，表征光子能量传播方向的群速度和群折射率的值会随光子能量的增大而发生从负到正的改变，这与本论文研究的实验测量和观察结果相符合。

It is specially pointed Out that the comb filter has the property of preserving spectral shape of noise from Σ－△A/D moodulation.

给出了梳状滤波器的设计方法，作为一个例子对地震仪中广泛采用的Σ－△A／D转换器CS5324中的梳妆滤波器进行了分析说明。

Due to all-phase FFT's excellent property of inhibiting spectral leakage, the proposed method is also feasible in the cases of dense spectrum distribution.

由于全相位FFT具有抑制频谱泄漏的优良特性，因此该法适合于密集频率分布场合。

Using the theoretical knowledge of spectral response and property evaluation way, the on-line measurement results are analyzed and some conclusions are obtained. The properties of domestic and foreign NEA phocathodes are compared, and the reasons causing low performance of domestic NEA photocathodes are discussed.

第四章首先介绍了评价NEA光电阴极特性的参量，包括参量的意义、测量方法及当前NEA光电阴极的参量水平，在此基础上阐述了NEA光电阴极性能评估的实现方法和途径，最后简介了NEA光电阴极性能评估实验系统的设计和研制。

In order to maximize the ratio of the received signal power to the noise and interference power, an optimization method, which uses the criteria of minimizing the highest side-lobe, is proposed to optimize the DWMT filter banks. Design results indicate that this method has better spectral separation property.

本文按照接收信号噪声干扰比最大的系统设计要求，采用滤波器组最大副瓣最小化准则，提出了一种用于DWMT系统的滤波器组优化方法，结果显示具有较好的频谱隔离特性。

According to static stability and avoiding the singularity induced bifurcation, saddle-node bifurcation, and Hopf bifurcation in power systems, this paper presents mathematical models for stability equilibrium solutions based on the semismooth property of spectral functions in mathematics.

针对电力系统中静态稳定和避免奇异诱导分岔、Saddle-Node分岔、Hopf分岔几类典型的系统稳定问题，基于数学上谱函数的半光滑特性，建立了系统稳定平衡解的数学模型。

In this work, Ag/TiO_2 was opted, the synthesis and UV-Vis. spectral property of nanoparticles with titanium dioxide as the covering shell and silver as the inner core were discussed.

论文以Ag/TiO2为体系，重点研究以二氧化钛为包覆层、金属银为核的纳米粒子的合成与制备，着重讨论了其紫外一可见光吸收性能。

In experiment,with the excitation of visible light 514.5nm and near infrared light 785nm respectively,the SERS spectrum of the 4-MBA molecule with 10~(-6)M is demonstrated,thus the broad spectral SERS property is validated.

实验中通过可见光514.5nm和近红外光785nm的激励，演示了对10~(-6)M的4MBA分子SERS信号的测量，验证宽谱的特性。

Sign symmetric matrix;anti sign symmetric matrix;weakly sign symmetric matrix;spectral property

符号对称矩阵；反符号对称矩阵；弱符号对称矩阵；特征值

With X ray powder lens of report of diffractive, scanning, hot analysis, infra-red spectrum is mixed the structure of child of fluorescent and spectral token and property.

用X射线粉末衍射、扫描电镜、热分析、红外光谱和荧光光谱表征产物的结构和性质。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。