查询词典 spectral

A menu of 10+ spectral estimators from Steve Kays textbook, Modern Spectral Estimation, 1988, is available to choose from.

菜单10 +谱估计，从史蒂夫凯的 S教科书，现代谱估计， 1988年，是可供选择。

Therefore we have optimized the experimental system and the working status of instrument.2 The near-field SERS spectra and images for the [Ru_3]~(2+) molecule adsorbed on silver nanoparticle substrate were achieved. Based on the results, some specific phenomena for near-field SERS were found. By observing the near-field SERS spectra collected at different location at the nano-scale, the different spectral characteristics which are caused by the local environmental differences of molecules have been found. On the substrate, the highly SERS active sites are much more than SEF hot spots, and the distribution of them is not entirely consistent. This phenomenon could be explained by the influences of several factors including the different enhancement efficiencies existed for SERS and SEF, the quenching effects for fluorescence by the metal substrate and metal-coated tip, and the presence of different numbers of probing molecules in SERS and SEF.3 It is of interest that the near-field and far-field SER spectra demonstrate several distinctively different spectral features.

由于SNOM与SERS的结合在技术上将面临很多实际困难，例如近场激发信号极其微弱、纳米级微弱光谱的收集对实验精度和环境稳定性的苛刻要求等，因此我们对实验体系和仪器工作状态分别进行了优化。2获得了银纳米粒子SERS基底上[Ru_3]~(2+)分子在纳米尺度下的近场SERS光谱和图像，从中可以发现一些近场SERS效应特有的现象：通过观察不同位置得到的近场SERS光谱可以发现，在纳米尺度下，由于分子所处局域环境不同而体现出不同的光谱特征；此基底具有极高SERS活性的位点远多于表面增强荧光热点，且两者的分布并不完全一致。

From these analyses, we found that the spectral index is higher than,and gained that the evolution of AGNS could be from high-energy objects to the low-energy objects,such as BL Lac objects to the low-polarizble Quasar. In the paper, we also studied the possible correlations of the redshift and the spectral index and flux densities for different wavebands.

同时本论文还对活动星系核的各波段的流量密度进行了分析，得出：活动星系核的演化是由流量密度大的天体演化到流量密度小的天体；活动星系核的各波段辐射流量存在线性相关性，尤其是BL Lac的各波段辐射流量的线性相关特别突出。

The results show that the normal total emissivity of T700 carbon fiber and T300 surface desizing carbon fiber are lower than T300 original sample, and the variation of spectral emissivity is in three wavebands, spectral emissivity is in three wavebands, this is related with the microstructure of carbon fiber.

结果表明：T700碳纤维和经过表面除胶后的T300碳纤维样品，其法向总发射率有所降低，光谱发射率基本在三个波段范围内变化，这与碳纤维的微结构有关。

The results show that the extent of loose structure can be changed by different fiber distribution, the normal spectral emissivity and total emissivity of carbon fiber perform by adopting ply yarn process and carbon felt were higher than carbon cloth perform, and the normal spectral emissivity and total emissivity of porous C/C performs reinforced by short-cut fiber were also relatively superior to that reinforced by carbon fiber cloth.

结果表明，不同的纤维排布改变了样品的结构松散程度，多股线排布的碳素纤维预制体及碳毡的法向光谱发射率和法向总发射率均优于碳素纤维布预制体，短切纤维增强碳/碳多孔坯体的法向光谱发射率和法向总发射率优于碳布增强坯体。

It illustrates that the vertical resolution of absorption band wing can be increasedby computing spectral channel weighting function when the wing of the spectral channelnarrow down.

利用高光谱分辨率数据，光谱通道宽度变窄，计算权重函数，揭示出高光谱可以提高吸收带翼区的垂直分辨能力，同时可作为研制我们高光谱红外大气探测器选择波段的依据。2。

Based on studying the influencing factor on the spectral width of echo signal of airdar16000 wind profiler radar, and extracting the spectral width contributing by turbulence, the turbulent dissipation rate can be estimated.

分析了airdar16000风廓线雷达的回波功率谱谱宽的影响因素，提取出湍流贡献的谱宽加宽，并由此计算湍流耗散率。

The experiment also shows that it is possible to get oil spill imaging from near ultra-violet to red spectral region with optimal spectral band selecting, but the violet-blue region is a best band, then blue-green, and the red region is poor for oil spill imaging.

实验还表明，选择最佳光谱段组合，从光谱近紫外区到红区均能获取海面油溢图像，其中以紫蓝光谱区最为理想，近紫外区和蓝绿光谱区次之，红区较差。

Two basic struture capable of providing two-dimensional spectral form t and their performance such as wavelenth accuracy, spectral resolution, energy throughput, stray light were diss〓ussed throretically.

提出实现二维光学分布的两种方法，并对有关特性，如波长准确性、分辨率、通光能力、杂散辐射等在理论上作了分析。

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.

摘要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。

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％。