查询词典 reflectivity

The severe storms on the squall line had large radar reflectivity and high tops of echoes. There was a divergence at lower level, a convergence at middle level, and a divergence at upper level in the velocity cross section of the squall. The VIL (Vertical Integrated Liquid water) of the storms increased rapidly to a large value, which is a good indictor of hailstorm. When the probability of severe hail is larger than 30% according to the hail index products, a hail storm is very likely to happen. The convergence line in the boundary can trigger and intensify convections.

结果表明：飑线是在有利的天气形势下发生的，飑线上强风暴的强度大、高度高；飑线速度剖面图中显示有低层辐散、中层辐合、高层辐散的特征；垂直累积液态水含量迅猛增加到比较大的数值对冰雹预报有很好的指示意义；在冰雹指数产品中以强冰雹概率大于30%作为冰雹预警门限则有较好的效果；边界层辐合线起到了触发对流和加强对流的作用。

Experiments of stimulated Brillouin scattering for pulse compression and energy reflectivity in K9 glass and fused silica.

K9玻璃与熔融石英中纵向受激布里渊散射的脉宽压缩和能量提取效率。

By simulating the natural conditions and building up a database of backscattering coefficient and emissivities using IEM model, it is found that when ratio of rms height and correlation length is in some certain range, the ratio of backscattering coefficient to reflectivity is linear or polynomial with surface roughness.

分析所建立的数据库后，得出在0.2＜均方根高度＜1.7，均方根坡度＜0.2和2.0＜均方根高度＜4.0，0.2＜均方根坡度＜0.4两种情况下后向散射系数与反射率之比与土中国科学院遥感应用研究所博卜学位论文壤粗糙度的关系。

A fiber grating is used for output of resonant cavity with 60% reflectivity.

反射率为60%的光纤光栅用作光纤激光器谐振腔的输出，3dB带宽为016nm。

A fiber grating is used for output of resonant cavity with 60% reflectivity. Its 3 dB-bandwidth is measured as 0.16 nm.

反射率为60%的光纤光栅用作光纤激光器谐振腔的输出，3 dB带宽为0.16 nm。

It is shown that it is difficulty to differentiate each vegetation type among sub-tropical evergreen forest, sub-tropical coniferous forest and sub-tropical deciduous forest because of the mixture of their tree spectra. According to the reflection index in the wavelengths of 750 nm to 1 100 nm, the tree species can be divided into 4 groups with descend in reflectivity. Each tree specie can be differentiated from each other according to its slope of the spectrum curve and its reflection index in the wavelengths of 770 nm to 1 010 nm for each forest vegetation type. The unique first order derivative feature can be used to identify litsea, alder, fir, red birch, southwest birch, large schima confertiflora, taiwania flousian and small leaf schima confertiflora.

研究表明：亚热带常绿阔叶林、亚热带针叶林和亚热带落叶阔叶林等植被类型，因其树种间光谱特征混淆严重，而难以彼此区分；根据其反射率在750~1 100 nm范围上的差异，可将其归为4类；就各植被类型而言，其树种间在光谱曲线坡度，以及在770~1 010 nm范围上具有显著差异，可据此将其区分；木姜子、桤木、杉木、红桦、大叶木荷、秃杉和小叶木荷等因具有独特的光谱一阶导数特征，据此可以识别提取。

The temporal evolution in transient reflectivity change ?嵇/R is composed of two relaxing parts: a fast component with time sub picoseconds and a slow component with time constant ranging from tens of ps to hundreds of ps.

瞬时反射率的变化主要由两个部份所构成：弛缓时间在次皮秒级(sub-picosecond)的快弛缓行为，以及弛缓时间在数十到百个皮秒的慢弛缓行为。

The model considers as many factors as possible, including nonuniform distribution of photon intensity and carrier density along active region, gain spectral dispersion, spontaneous emission spectrum and facet reflectivity, and is applicable under the condition that the pulse width of injecting signal is wider than 10 picoseconds. It provides a convenient and effective theoretical platform for SOA dynamic characteristic study.

该模型考虑光子密度和载流子浓度沿有源区的非均匀分布、增益谱色散性、自发辐射噪声谱和端面反射率，适用于脉冲宽度高于10ps的信号输入的情况，为后续研究SOA动态特性提供了方便而有效的理论验证平台。

The dramatic installation relies on the scale of the structure and on the reflectivity of the inner walls of the cut-outs which creates a ricocheting effect.

戏剧性的安装依靠规模和结构上的削减内壁反射奏它创建一个记着效果。

With FDDA method, the precipitation echo reflectivity field gained by observation and three dimension wind field as well as other parameters obtained by retrieval are put into the usual mesoscale or smallscale numerical model, so that the inner structure of mesoscale or smallscale weather system is better researched and precipitation is estimated more exactly.

2利用四维同化方法，将单多普勒天气雷达观测得到的降水回波的反射率场以及用反演技术得到的三维风场及其它变量，加入到通用的中小尺度数值模式中，以便更好地研究中小尺度天气系统的内部结构，预测其演变，并提供更精确的降水估计。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。