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Starting from the Huygens-Fresnel diffraction integral,the spectral shifts and spectral switches of femtosecond optical pulses in Young′s interference experiment are studied and analyzed numerically.

从惠更斯-菲涅耳衍射积分公式出发，对飞秒光脉冲在杨氏实验中的光谱移动和光谱开关做了研究和数值分析。

The spectral curve vs invariant mass is becoming wider and the peak is shifted towards the high invariant mass region with the increase of temperature. However, in ultra high temperature or density envi- ronment, the peak is shifted towards lower region and the curve is changed narrower with the increase of temperature. In the invariant mass region M 憕.-?0.4 GeV?.6 Ge1~, the spectral function is enhanced very much. which contributes to the interpretation of dilepton enhancement results in relevant experi

结果显示高温高密强子物质环境对其有非常重要的影响：ρ谱函数在温度或密度不太高时谱函数曲线变宽，并且峰朝不变质量高的方向移动；在极端高温或高密情况下谱函数却变窄，并且峰朝不变质量低的方向移动，在不变质量M～0.4-0.6 GeV区间谱函数有比较明显的增强，这有助于解释双轻子产生的相关实验现象。

When the CDOM concentration ρ≥150mg/L, the excitation and emission wavelengths in the SFS spectrograms moved blue with decreasing CDOM concentration, and the SFS spectral shapes also changed; when ρ50mg/L, the excitation and smission wavelegths in the SFS spectrograms didn't move, and the SFS spectral shapes were invariant, but the fluorescence intensity decreased with decreasing CDOM concentration.

不同质量浓度CDOM水溶液的SFS显示，当质量浓度ρ≥150mg/L时，随着质量浓度降低，激发和发射波长也向短波长方向移动，其谱形也发生变化；当ρ50mg/L时，激发和发射波长不发生漂移，谱形不变，荧光强度随质量浓度降低而降低。

A novel method for redshift determination and spectral line identification of celestial spectra is presented, which is based on the knowledge of feature spectral lines.

该文给出了一种基于知识的天体光谱的红移测量和谱线证认方法。

The frequency spectrum is composed by not the continual spectral line,each spectral line represents a harmonic component.

频谱是由不连续的谱线组成，每条谱线代表一个谐波分量。

Compared with the methods based on spectral line matching, this method is lesssensitive to the quality of spectral line extraction.

该方法首先利用提取出的谱线

Astronomical spectral analysis and recognition mainly includespectral classification, parameter measurement and spectral line identification.

天体光谱的自动分析与识别主要包括光谱分类、参数测量和谱线证认。

Redshift determination and spectral line identification are the most important partsin spectral recognition.

红移测量和谱线证认是天体光谱自动识别中最重要的内容。

Compared with the existing methods based on spectral line matching, the proposed method has a lower dependence on the quality of spectral line extraction.

实验结果表明：此方法的鲁棒性较好，性能优于基于谱线匹配的方法。

Methods: Used the method of ultraviolet spectral line group, the UV spectral of the solutions extracted by four different kinds of solvents.

应用紫外谱线组法，测试9种老鹳草在4种不同溶剂中的紫外吸收光谱。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。