反射率

Multiple linear stepwise regression technique was used to analyze the relationships between SPAD values and the reflectance spectra.

采用可见-近红外光谱仪分析了油菜叶片的光谱特性，建立了油菜叶片光谱反射率与SPAD值之间的定量分析模型。

The results showed that there was a significant linear correlation between SPAD value and chlorophyll content; SPAD value varied significantly between two varieties.

结果表明；苹果叶片的叶绿素含量与SPAD值呈线性相关；品种间的SPAD值和光谱反射率都存在差异。

Design of transmissivity and reflectivity automatic measuring system［J］.

透反射率自动化测量系统设计［J］。

The function of 3dB fiber loop mirror in fine wavelength partition is studied. With this theory, a novel narrow linear band, dual-wavelength switchable Er-doped fiber laser is realized.2. An unpumped Er-doped fiber and broadband fiber Bragg grating with high reflectivity is served as an auto-tracking filter, where the space hole-burning effect appears when the laser signal travels and forms standing wave, thus the generation of multi-longitudinal-mode is suppressed. Then the high birefringence fiber loop mirror is introduced to act as comb-liked wavelength filter.

主要包括：1、发现3dB光纤环镜的精细波长分割作用，并利用这种分割机制，研制成功一种窄线宽、双波长可转换的掺铒光纤激光器。2、利用未受泵浦的掺铒光纤以及宽带高反射率的光纤布喇格光栅做自动跟踪滤波器，当穿行其中的激光信号构成驻波时，出现了空间烧孔效应，从而抑制了多纵模的产生，引入高双折射光纤环镜做梳状波长滤波器。

The effect of HgCdTe composition ununiformity on X-ray reflectivities is studied.

用X射线动力学理论研究了组分不均匀对HgCdTe材料X射线反射率的影响。

The other one retrieves vertical velocity from the reflectivity using statistical algorithm and assimilates the vertical velocity taking Richardson's equation as observational operator. It is found that the vertical velo city derived by the former is usually too weak while the later gets the distinct three dimensional convective structure of meso-scale system with strong vertical velocity.

其一是采用Richardson方程通过水平风场、温度和气压来对垂直速度进行诊断，其二是利用统计方法由观测的反射率因子反演出垂直速度后，再采用Richardson方程作为观测算子对反演的垂直速度进行同化。

A simple and inexpensive optical fiber vibrometer with reflectivity and illuminating power compensation was presented.

介绍了一种结构简单、价格低、带有反射率和亮度补偿的光纤振动计。

Results of experiments show that this optical fiber vibrometer is suitable for dynamic mensurement ,capable of making compensation of target surface reflectivity ,illuminating power and mean distance between probe and target surface.

实验结果表明，这一方法适宜于动态测量，可以实现被测表面反射率、入射亮度及探头与被测表面间平均距离的补偿。

The measurement of reflectance is at 3B1 line of synchron radiation devices in Beijing High Energy Physical institute, Chinese Academy of Science.

多层镜反射率的测量是在中国科学院北京高能物理研究所的同步辐射装置的3B1束线上进行的。

The dielectric function and complex refractive, reflectivity, and absorption coefficients of anatase TiO2 dominated by electron interband transitions are analyzed in terms of the precisely calculated band structure and density of states.

利用精确计算的能带结构和态密度分析了电子带间跃迁占主导地位的锐钛矿相TiO2的介电函数、复折射率、反射率和吸收系数，理论计算得到的结果与实验测量结果基本一致。

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％。